ELECTRICIAN (THEORY) SEMESTER-III JULY 2018

ELECTRICIAN

(THEORY)

SEMESTER-III

JULY 2018

Which of the following is not a part of the
Alternator's specification plate ?
(a) Voltage
(b) Phase
(c)KVA 
(d) Type of winding
Answer: (d) Type of winding
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A single phase Hysteresis motor can run at.......
(a) Synchronous speed only
(b) Sub synchronous speed only
(c) Synchronous and super synchronous speed
(d) Synchronous and sub synchronous speed
Answer: (a) Synchronous speed only

The direction of rotation of Hysteresis motor
 is reversed by............
(a) Reversing supply leads
(b) Shift shaded pole with respect to main pole
(c) Both (a) & (b)
(d) None of these
Answer: (b) Shift shaded pole with respect to main pole

The motor used in domestic mixer grinder is................
(a) DC motor
(b) Induction motor
(c) Universal motor
(d) Synchronous motor
Answer:  (c) Universal motor

A Stepper motor is a.....
(a) DC motor
 (b) Two phase motor
(c) Single phase motor
 (d) Multi phase motor
Answer:
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The slip ring induction motors have..............rotor.
(a) Phase wound
(b) Squirrel cage
(c) Squirrel cage with winding
(d) Diamond coil wound
Answer: (a) Phase wound

The difference between the speed of a rotating
magnetic field and the associated rotor is called .............
(a) Split
(b) Salient pole
(c) Slip
(d) Pul1 out tor(lue •
Answer: (c) Slip

If the voltage is reduced to half, the torque
developed by an induction motor will be
reduced to..................
(a) 1/4 of original torque
(b) 1/2 of original torque
(c) 1/8 of original torque
(d) 2/3 of original torque
Answer:
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In a three phase induction motor, the cage bars
of the rotor are arranged in an offset
pattern to the axis of rotation in order to prevent ...............
(a) Torque fluctuation
(b) Over heating
(c) Speed variation
(d) Voltage drop on load
Answer: (a) Torque fluctuation

The variation of power factor with respect to the field
current is called ...............
(a) V curve
(b) Inverted curve
(c) Hysteresis curve
(d) Circle diagram
Answer: (b) Inverted curve

When asynchronous motor is running at
synchronous speed, the damper winding
produces.................
(a) Damping torque 
(b) Eddy current torque
(c) Torque aiding the developed torque
(d) No torque
Answer: (d) No torque
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A motor which can conveniently be operated
at lagging as well as leading power factor is
the...................
(a) Squirrel cage induction motor
(b) Wound rotor induction motor
(c) Synchronous motor
(d) DC shunt motor
Answer: (c) Synchronous motor

A synchronous motor is operating on no load
at unity power factor. If the field current is
increased, power factor will become............
(a) Leading and current will decrease
(b) Leading and current will increase
(c) Lagging and current will decrease
(d) Lagging and current will increase
Answer: (a) Leading and current will decrease

The frequency of ripple in the output voltage of a
three phase Half controlled bridge rectifier
depends on the................
(a) Firing angle
(b) Load inductance
(c) Load resistance
(d) Supply frequency
Answer: (d) Supply frequency

A PWM switching scheme is used in a three phase inverter to........
(a) Reduce total harmonic distortion with modest filtering
(b) Reduce low order harmonics and increase high order harmonics
(c) Minimize the load on DC side
(d) Increase the life of the batteries
Answer: (b) Reduce low order harmonics and increase
                 high order harmonics

Which of the following is a Shell type of transformer lamination?
(a) T & I type
(b) E & T type
(c) U & I type
(d) T & U type
Answer: (d) T & U type
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For a given number of poles(2) and armature conductors,
a hp winding will carry.............a wave winding.
(a) More current than
(b) Same current as
(c) Less current than
(d) Half the current than
Answer:  (a) More current than

An Eight pole duplex lap winding will have ......... parallel paths.
(a)  8
(b) 12
(c)  32
(d)  16
Answer:  (d)  16

In a simplex wave winding the number of
parallel paths is equal to
(a) Number of poles in the machine
(b) Two
(c) Number of pair poles
(d) One
Answer: (b) Two

The number of parallel paths in simplex lap
winding is equal to...
(a) Two
(b) Number of poles
(c) Number of pair poles
(d) One
Answer: (c) Number of pair poles
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In a lap winding, the number of brushes required
is equal to............
(a) Number of coils
(b) Number of pairs of poles
(c) Number of poles
(d) Commutator  pitch
Answer: (c) Number of poles

In a wave winding, the commutator pitch is
approximately equal to..................
(a) Twice the pole pitch
(b) Thrice the pole pitch
(c) Half the pole pitch
(d) Pole pitch
Answer: (a) Twice the pole pitch

The AC armature winding of an alternator
operates at........the field winding.
(a) The same voltage as
(b) Much higher voltage than
(c) Much less voltage than
(d) Half the voltage than
Answer: (b) Much higher voltage than
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The stator of an alternator is wound for..........on the stator.
(a) A more number of poles than
(b) Less number of poles than
(c) The same number of poles as
(d) Twice the number of poles
Answer: (c) The same number of poles as

The Damper windings are used in the alternators to ……
(a) Reduce eddy current loss
(b) Achieve synchronism
(c) Reduce winding losses
(d) Prevent hunting
Answer: (d) Prevent hunting
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The AC armature winding of an alternator is.................
(a) Always star connected .   
(b) Star delta connected
(c) Generally delta connected
(d) Pi connected
Answer: (a) Always star connected
While testing a Fluorescent tube starter with series
testing board, the starter is considered good if the lamp................
(a) Glows continuously
(b) Does not glow at all
(c) Continuously flickers
(d) Glows initially then turns off permanently
Answer: (c) Continuously flickers

The illurnination power of a lighting source is measured in.
(a) Lumen
(b) Candela
(c) Foot candle
(d) Candle power
Answer: (d) Candle power
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As per IE rules, the lighting load in a sub-circuit
of the house wiring should not be than.........watts.
(a) 1500W
(b) 1200W
(c) 1000W
(d) 800W
Answer: (d) 800W

As per IE rules, the load in a power sub-circuit in
house wiring is normally restricted to........watt
and number of outlets to.........
(a) 5000, two
(b) 3000, two
(c) 4000, three
(d) 4500, four
Answer: (b) 3000, two

In a Fluorescent tube fixture, if the tube does
not strike a glow but both filaments glow
red, the possible defect is............
(a) Opened choke coil
(b) Short circuited choke coil
(c) Starter contacts permanently opened
(d) Starter contacts permanently shorted
Answer: (d) Starter contacts permanently shorted

The electrical wiring in factories and industries
is done by.........,.
(a) Cleats
(b) Casing capping
(c) Surface metal conduit
(d) Surface PVC conduit
Answer: (c) Surface metal conduit

The magnetic operating limit of C-type of
MCB’s is..........times of the rated current.
(a) 5 to 10
(b) 20 to 30
(c) 3 to 5
(d) 10 to 20
Answer: (a) 5 to 10
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Which one of the following lamps has the
longest operating life?
(a) LED lamp
(b) Fluorescent tube light
(c) CFL
(d) Incandescent lamp
Answer: (a) LED lamp

When the Growler is connected with 230 V,
AC supply and armature is placed over it,
the arrangement behaves like a....................
(a) Potential Divider
(b) AC Motor
(c) Transformer .
(d) DC Bridge
Answer: (c) Transformer
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A motor normally fitted to a domestic
vacuum cleaner is.............motor.
(a) Universal
(b) Cage Induction
(c) Wound rotor
(d) Shunt Wound
Answer: (a) Universal

The type of single-phase induction motor
 having the highest power factor at full load
is....:..............
(a) Shaded pole type
(b) Split-phase type
(c) Capacitor-start type
(d) Capacitor-run type
Answer: (d) Capacitor-run type

The method of braking an induction motor by
interchanging the supply to two of the
stator phase windings is called..................
(a) Plugging
(b) Stopping
(c) Commutation
(d) Retarding
Answer: (a) Plugging

If a three phase induction motor is switched on with
one phase disconnected, the motor will ................
(a) Run at low speed
(b) Burn Out
(c) Run at High Speed
(d) Not Run
Answer: (b) Burn Out
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The running of induction motors at slow and
steady speed much less than the actual
speed  is known as.
(a) Crawling
(b) Damping,
(c) Sinking
(d) Ageing
Answer: (a) Crawling
The distribution of load between two alternators
operating in parallel can be changed by
changing...............
(a) Phase sequence .
(b) Field excitation of alternators
(c) Current direction
(d) Driving torques of prime movers
Answer: (d) Driving torques of prime movers

A 3-phase synchronous motor connected to
AC mains is running at full load and unity
power factor. If its shaft load is reduced by half,
with field current held constant, its new
power factor will be.........
(a) Unity
(b) Leading
(c) Lagging
(d) Dependent upon motor parameters
Answer: (b) Leading
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The starting torque of slip-ring induction motor
can be increased by inserting a suitable ……..
in series with the rotor circuit of the motor,
(a) Capacitor
(b) Resistance
(c) Inductor
(d) Overload relay
Answer: (b) Resistance

The Growler instrument is made in ...............
type of iron core.
(a)  E & I
(b) Shell
(c) T&U
(d) H
Answer: (d) H

The voltage regulation of an alternator with power
factor of 0.8 lagging is ……. at unity power factor.
 (a) Greater than
(b) The same as
(c) Smaller than
(d) 100%
Answer: (a) Greater than
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A ceiling fan uses.......
(a) Capacitor start motor
(b) Universal motor
(c) Capacitor start and capacitor run motor     
(d) Split-phase motor
Answer: (a) Capacitor start motor

The voltage regulation of an alternator is larger
than that of a DC generator because of ..................
(a) Large armature resistance
(b) Large leakage reactance
(c) Complex effects of armature reaction
(d) Small armature resistance
Answer: (c) Complex effects of armature reaction

[f the excitation an alternator operating in
parallel with other alternators, is increased
above the normal value of excitation, its .........
(a) Output current decreases
(b) Power factor becomes more lagging
(c) Power factor becomes more leading 
(d) Output KW decreases
Answer: (b) Power factor becomes more lagging

Jan18 WIREMAN THEORY SENIESTER-II

Jan18 WIREMAN THEORY
SENIESTER-II

The advantage of moving coil permanent magnet type instrument is-
a) Law power consumption
b) No hysteresis loss
c) Efficiency eddy current damping
d) All of these

The internal resistance of an ammeter is-
a) Zero
b) Very low
c) Very high
d) Infinite

The moving iron type voltmeter and ammeter are suitable to measure the potential difference and current in-
a) A.C. circuit only b) D.C. circuit only
c) Both a.c. and d.c. circuits
d) None of these

Ammeter falls under the category of-
a) Indicating instruments
b) Recording instrument
c) Integrating instruments
d) Standard instrument

In moving iron type instrument because of hysteresis in the iron parts of the moving   system, the readings are-
a) Higher on descending value but lower on ascending values
b) Higher on ascending values but lower on descending values
c) Higher on both ascending as well as descending values
d) Lower on both ascending as well as descending values

Ohm meter is-
a) A meter to record ohm
b) Used to measure resistance
c) Combination of ohm and meterd) An indicating instrument

In a moving iron type ammeter the coil has-
a) Large number of turns of thick wire
b) Large number of turns of thin wire
c) Few turns of thin wire
d) Few turns of thick wire

Volt meter resistivity is defined
a) Reciprocal of full scale. deflection current
b) Volt per ohm
c) Ohms per volt
d) It is degree of sensitiveness to impulse change

Which of the following instrument is undesirable for measurement of AC value?
a) Moving iron repulsion type
b) Moving iron attraction type
c) Dynamometer type
d) Permanent magnet moving coil type

Maximum current measured by the clip on ammeter is -
a) 700 Amp
b) 500 Amp
c) 800 Amp
d) 1000 Amp

For the measurement of voltage and current in the ratio frequency range, suitable instrument is-
a) Moving iron type
b) Moving coil type
c) Electro thermic type
d) Electrostatic type

The wattmeter which cannot be used on D.C. circuit is-
a) Thermal wattmeter
b) Electrostatic wattmeter
c) Induction wattmeter
d) Electro — dynamic wattmeter

In a megger when not in operation, the needle shows a resistance of-
a) Zero ohm
b) 100 ohm
c) 555 ohm
d) Infinity

The resistance of the shunt for an ammeter is usually of the order of-
a) 1000 ohm and above
b) 100 ohm and above
c) Less than 100 ohm
d) Less then 1 ohm

Instrument current transformer is used to operate -
a) Volt meter
b) Watt meter
c) Ohm meter
d) Ammeter

Vibrating reeds are employed in-
a) Frequency meter
b) Power factor meter
c) Synchroscope
d) Megger

Vibrating reed frequency meter operates on the principle of-
a) Phenomena of electrical resonance
b) Phenomena of mechanical resonance
c) Variation of impedance of an inductive coil circuit with the variation in supply frequency
d) None of these

A Weston frequency meter is a-
a) Dynamometer type instrument b) Moving coil instrument
c) Moving iron instrument
d) Induction instrument

Which wiring system is inside of wall?
a) P.V.C. wiring
b) Batten wiring
c) Concealed wiring
d) Pipe wiring

In house wiring all lighting switch are of capacity rating of -
a) 6 amp.
b) 16 amp.
c) 32 amp.
d) None of these

Green coloured cable indicates -
a) Phase line
b) Neutral line
c) OK line
d) Earthing connection

According to I.S.I. the maximum power load in a sub — circuit should not be more than-
a) 1000 W or two points
b) 2000 W or two points
c) 3000 W or four points
d) 500 W or one point

What is the maximum number of lighting points that can be connected in a circuit?
a) 10 b) 05 c) 08 d) 12

Light point is fixed from the ground level to height of-
a) 2.75 mtr.
b) 2.5 mtr.
c) 2.13 mtr.
d) 1.8 mtr.

Which type of wiring is done in workshop?
a) Conduit pipe wiring
b) Cleat wiring
c) Batten wiring
d) L.C.C. wiring

Earth connection can be available from-
a) Pole/Ground
b) Meter
c) Fuse
d) Switch Board

Red colour wire is used as -
a) Earth wire
b) Phase wire
c) Neutral wire
d) Insulated wire

Cleat wiring is used for-
a) Temporary lighting at dry places
b) Permanent lighting at dry places
c) Both used (a) and (b)
d) None of these

Refrigerator, Air conditioner, Microwave oven, washing machine :need socket/plug with the minimum capacity of
a) 16 amp.
b) 2.5 amp.
c) 6 amp.
d) 10 amp.

Which material is used for wiring continuous busbar?
a) Aluminum
b) Copper
c) Both (a) and (b)
d) None of these

For what voltage level are the screwed conduit circuit used-
a) Less than 250 volt
b) For voltage between 250 volt- 600 volt
c) For voltage above 600 volt
d) None of these

Which among these is a method of wiring?
a) Joint box
b) Tee system
c) Loop in system
d) All of these

An electric bulb can work from-
a) D.C. supply only
b) A.C. supply only
c) Battery Supply only
d) Al of these

Lux is a unit of illumination-
a) It is equal to foot candle
b) It is less than foot candle
c) It is more than foot candle
d) It has no relation with foot candle

Light-
a) Is a form of electricity energy b) Is a form of heat energy
c) Consist of electromagnetic waves
d) Consist of shooting particles

Colour of light depends upon-
a) Wave length
b) Frequency of the wave
c) Speed of the light
d) (a) and (b) above

One foot candle is equal to-
a) 1/10 lux
b) 10 lux
c) 100 lux  
d) 1000 lux


In a sodium vapour lamp, the discharge is first started in the-
a) Neon gas
b) Nitrogen gas
c) Argon gas
d) Krypton gas

Which lamp cannot sustain much voltage fluctuation?
a) Incandescent lamp
b) Fluorescent lamp
c) Mercury vapour lamp
d) Sodium vapour lamp

Filament lamp at starting will take current-
a) Equal to its full running current
b) Less than its full running current
c) More than its full running current
d) None of these

Illumination of one lumen per sq. meter is called-
a) Ft. candle
b) Candela
c) Lux
d) Lumen, meter

The following discharge lamp needs separate choke:
a) Fluorescent lamp
b) Sodium vapour lamp
c) Mercury vapour lamp
d) All of these lamps

Fluorescent tube is coated from inside with white powder. This is done to-
a) Change the colour of light emitted to white
b) Improve che appearance
c) Increase the light radiations due to secondry emission
d) Improve its life


Which part is the "brain" of the computer?
a) Monitor
b) CPU
c) RAM
d) ROM

The permanent memory built into your computer is called -
a) RAM
b) CPU
c) ROM
d) CD - ROM

Which of the following is not an input device?
a) Monitor
b) Keyboard
c) Joystick
d) Microphone

Which of the following is not an output device?
a) Monitor
b) Printer
c) Speaker
d) Keyboard

Which device allows your computer to talk to other computer over a telephone line as well as access the internet?
a) RAM
b) CD-ROM drive
c) Modem
d) Hard drive

Which of the following is an operating system you would be using on the computer?
a) Internet Explorer
b) Netscape
c) Microsoft word
d) Microsoft windows

Which of these is not a computer manufacturer?
a) IBM
b) Applé
c) Microsoft
d) Sun

Jan18 WELDER THEORY SEMESTER -II

Jan18 WELDER THEORY
 SEMESTER -II

Unlike TIG welding, MIG welding (a) Requires no flux
(b) Requires no post-weld cleansing
(c) Uses consumable electrodes
(d) Provides complete protection from atmospheric contamination

In Gas Metal Arc welding, the electrode extended from the end of the contact tip to the arc is known as -
(a) Electrode length
(b) Electrode extension
(c) Electrode retention
(d) Electrode projection

Argon and helium are the two commonly used inert gases. Which one is preferred for
h.'flG welding of copper?
(a) Helium
(b) Argon
(c) No preference
(d) Mixture of helium and argon

All commercially available electrodes contain deoxidizing metals. Which of the following is deoxidizing metal?
(a) Silicon
(b) Manganese
(c) Titanium
(d) All of these

MIG welding process is becoming increasingly popular in welding industry because of
(a) Its easy operaüon
(b) Its high metal deposition rate
(c) Its low initial cost
(d) Both its easy operation and its high metal deposition rate

Projection welding can be regarded as a mass production form of welding.
(a) Upset
(b) Spot
(c) Seam
(d) Butt

Which of the following is NOT true about globular metal transfer mode in Gas Metal Arc welding?
(a) It uses inexpensive C02
(b) It can weld at high speed
(c) Both (a) and (b)
(d) It gives less spatter

Metals like columbium can be easily welded by welding process.
(a) TIG
(b) MIG
(c) Flash
(d) Electron beam

Which of the following welding processes is used for welding of sheet metals in  automobile and aircraft industries?
(a) Shielded metal arc welding
(b) Gas tungsten arc welding
(c) Thermit welding
(d) Resistance welding

Which of the following is an example of fusion welding?
(a) Arc welding
(b) Forge welding
(c) Resistance welding
(d) Thermit welding with pressure

What is the form of flux used in submerged arc welding?
(a) Paste
(b) Powder
(c) Granulated
(d) Coil

The type of filler metal normally used in submerged arc welding is -
(a) Cored wire
(b) Bare wire
(c) Lightly coated wire
(d) Heavily coated wire

Which two items in MIG welding would need to be changed if the size of mild steel wire  electrode is changed from 0.9 mm to 1.2 mm?
(a) Contact tip and shroud
(b) Contact tip and drive rollers
(c) Gas diffuser and drive rollers
(d) Gas bottle and earth clamp

MAG process differs from NflG in that it uses  instead of inert gases.
(a) Hydrogen
(b) Nitrogen    
(c) C02
(d) All of these

Electroslag welding is -
(a) An arc welding process
(b) A gas welding process
(c) A non-arc welding process
(d) A resistance welding process

Electroslag welding is done in -
(a) Flat position
(b) Overhead position
(c) Vertical position
(d) Any position

In atomic hydrogen welding a single phase AC arc is maintained between two  electrodes.
(a) Carbon steel
(b) Copper
(c) Tungsten
(d) Aluminium

Which statement applies to thermit welding?
(a) It needs no external source of current
(b) It is suitable for joining parts having heavy cross — section
(c) The slag formed in this process is A1203
(d) All of these

Steel is an alloy of -
(a) Chromium and iron
(b) Sulphur and phosphorous

(c) Iron and carbon
(d) Manganese and riickel

Post — heating of weld is applied -
(a) Immediately after welding
(b) Before welding  
(c) During welding
(d) None of these

What does the tem 'pass' refer to as regards welded joint?
 (a) Depression in base metal (c) Shape of weld bead
(b) Each layer of weld bead deposited (d) Distance from electrode to metal

Metal particles expelled during welding are called -
(a) Porosity
(b) Overlap
(c) Spatter
(d) Undercut

The process of heating to a certain temperature and then quenching in order to make the
metal tough is the heat treatment process called -
(a) Hardening
(b) Annealing
(c) Tempering
(d) Normalizing

For submerged arc welding, what is the effect of raising arc voltage but keeping all other parameters the same?
(a) Weld bead width will increase
(b) Depth of penetration will increase
(c) Weld bead width will decrease
(d) Depth of penetration will decrease

What steps can be taken to prevent welding hazards in workshop?
(a) Idenüfy risks
(b) Evaluate hazards
(c) Establish control methods
(d) All of these

Thermit welding uses what to work?
(a) Oxygen and acetylene combined to form a flame
(b) Resistance of two metals held under pressure
(c) Enveloping tungsten using hydrogen gas
(d) An exothermic reaction between aluminium powder and metal oxide

Rotation of one of the workpieces to be joined is required in -
(a) Thermit welding
(b) Electroslag welding
(c) Friction welding
(d) TIG welding

Nickel based hardfacing alloys -
(a) Increase wear resistance
(b) Are highly resistant to corrosion
(c) Increase hardenability
(d) Cannot be deposited on carbon and heat steels

Metal with highest resistivity and lowest conductivity is -
(a) Copper
(b) Iron
(c) Nickel
(d) Titanium

The purpose of backing material at the root of a weld is -
(a) To support molten weld metal (c) To prevent lack of fusion
(b) A heat sink (d) All of these

In welding, the area of base metal melted as determined on a cross-section of the weld is the -

(a) Heat — affected zone (c) Dead zone
(b) Fusion zone (d) Twilight zone
Contd.. ..5/

18/A/C/SO/2/E
32. In TIG welding the electrode manipulated by the welder is -
(a) Made of tungsten (c) Both (a) and (b)
(b) Not consumed (d) None of these
33. When visually inspecting the root bead of a single V butt weld it should be checked for(a) Lack of root penetration (c) Tungsten inclusion
(b) HAZ hardness (d) Slag
34. A burn — through in a welded joint may occur if
(a) Current is too low (c) Root gap is too large
(b) Root face is too large (d) Arc voltage is too high
35. If a welding inspector detects a type of imperfection not allowed by the application standard, he should -
(a) Ask for explanation
(b) Reject the wéld

(c) Prepare a concession request
(d) Reject the weld only if he considers it to be harmful
36. If the unit of power is expressed in watt, which of the following is a correct relationship?
(a) Power (watt) = Ampere x Volt (c) Power (watt) = Volt x Ohm
(b) Power (watt) = Ampere x Ohm (d) Power (watt) = Ampere x Volt x Ohm
37. If 100 mm thick plates are to be welded, which of the following processes should be selected so as to get high production rate with square edge preparation?
(a) Electroslag welding (c) TIG welding
(b) C02 welding (d) Friction welding
38. In which of the following non-destructive methods, there is no need for supply of electricity?
 (a) X — ray test (c) Dye penetrant test
(b) Ultrasonic test (d) Hydraulic pressure test
...6/
18/NC/S-2/2/E -6-
39. The limitation of electron beam welding is    (a) High equipment cost
(b) The size of work chamber is a constraint
(c) Rapid solidification rate can cause cracking in some materials  (d) All of these
40. Protective equipment not suitable for eye protection from welding radiation includes -
(a) Welding helmet with filter plates (c) Safety goggles with filter plates
(b) Clear safety goggles (d) Protective screens
41. Which of the following is not considered a type of metal transfer for GMAW?
 (a) Short circuiting (c) Globular
(b) Spray (d) Droplet
42. The main types of welding joints are -
 (a) Flat, square, angled, upright and vertical
(b) Horizontal, single-V, double-V, T-joint and overhead

  (c) Butt, lap, corner, T-joint and edge joint
 (d) Butt, single bevel, double bevel, plasma and edge joint
43. The main positions for welding pipes are -
  (a) IG, 2G, 3G, 4G (c) IF, 2F, 5G, 6G  (d) IG, 2G, 5G, 6G
44.The height of the weld face above the base metal in a groove weld is called as (a) Crown (c) Buildup (b) Weld reinforcement (d) Face
45. A triangular — shaped weld symbol represents what type of weld?
(a) Fillet weld (c) Flare groove
(b) Bevel groove (d) V — groove
46. Which of the following should be removed in order to obtain a good dye penetrant test?
 (a) Varnish (c) Plating
(b) Oxides (d) All of these
 Contd....7/-
  18/NC/S-2/2/E
47. Which type of test uses a weighted pendulum which strikes a notched test specimen?
(a) Brinnel test (c) Tensile test
(b) Fatigue test (d) Charpy impact test
48. In electron beam welding to eliminate the defect porosity, which has to be adjusted?
(a) Spot size (c) Weld penetration
(b) Deflection (d) Focal position / focus current
49. Which one of the following tests makes use of sound waves?
(a) Radiographic test (c) Dye penetrant test
(b) Ultrasonic test (d) Magnetic particle test
50. The process of hammering the weld metal immediately after it is deposited is called    (a) Tinning (c) Pressing
(b) Peening (d) Dressing

Jan18 WIREMAN THEORY SENIESTER-II

Jan18 
WIREMAN THEORY
SENIESTER-II


The advantage of moving coil permanent magnet type instrument is-
a) Law power consumption
b) No hysteresis loss
c) Efficiency eddy current damping
d) All of these

The internal resistance of an ammeter is-
a) Zero
b) Very low
c) Very high
d) Infinite

The moving iron type voltmeter and ammeter are suitable to measure the potential difference and current in-
a) A.C. circuit only
b) D.C. circuit only
c) Both a.c. and d.c. circuits
d) None of these

Ammeter falls under the category of-
a) Indicating instruments
b) Recording instrument
c) Integrating instruments
d) Standard instrument

In moving iron type instrument because of hysteresis in the iron parts of the moving   system, the readings are-
a) Higher on descending value but lower on ascending values
b) Higher on ascending values but lower on descending values
c) Higher on both ascending as well as descending values
d) Lower on both ascending as well as descending values

Ohm meter is-
a) A meter to record ohm
b) Used to measure resistance
c) Combination of ohm and meter d) An indicating instrument

In a moving iron type ammeter the coil has-
a) Large number of turns of thick wire
b) Large number of turns of thin wire
c) Few turns of thin wire
d) Few turns of thick wire

Volt meter resistivity is defined
a) Reciprocal of full scale. deflection current
b) Volt per ohm
c) Ohms per volt
d) It is degree of sensitiveness to impulse change

Which of the following instrument is undesirable for measurement of AC value?
a) Moving iron repulsion type
b) Moving iron attraction type
c) Dynamometer type
d) Permanent magnet moving coil type

Maximum current measured by the clip on ammeter is -
a) 700 Amp
b) 500 Amp
c) 800 Amp
d) 1000 Amp

For the measurement of voltage and current in the ratio frequency range, suitable instrument is-
a) Moving iron type
b) Moving coil type
c) Electro thermic type
d) Electrostatic type

The wattmeter which cannot be used on D.C. circuit is-
a) Thermal wattmeter
b) Electrostatic wattmeter
c) Induction wattmeter
d) Electro — dynamic wattmeter

In a megger when not in operation, the needle shows a resistance of-
a) Zero ohm
b) 100 ohm
c) 555 ohm
d) Infinity

The resistance of the shunt for an ammeter is usually of the order of-
a) 1000 ohm and above
b) 100 ohm and above
c) Less than 100 ohm
d) Less then 1 ohm

Instrument current transformer is used to operate -
a) Volt meter
b) Watt meter
c) Ohm meter
d) Ammeter

Vibrating reeds are employed in-
a) Frequency meter
b) Power factor meter
c) Synchroscope
d) Megger

Vibrating reed frequency meter operates on the principle of-
a) Phenomena of electrical resonance
b) Phenomena of mechanical resonance
c) Variation of impedance of an inductive coil circuit with the variation in supply frequency
d) None of these

A Weston frequency meter is a-
a) Dynamometer type instrument b) Moving coil instrument
c) Moving iron instrument
d) Induction instrument

Which wiring system is inside of wall?
a) P.V.C. wiring
b) Batten wiring
c) Concealed wiring
d) Pipe wiring


In house wiring all lighting switch are of capacity rating of -
a) 6 amp.
b) 16 amp.
c) 32 amp.
d) None of these

Green coloured cable indicates -
a) Phase line
b) Neutral line
c) OK line
d) Earthing connection

According to I.S.I. the maximum power load in a sub — circuit should not be more than-
a) 1000 W or two points
b) 2000 W or two points
c) 3000 W or four points
d) 500 W or one point

What is the maximum number of lighting points that can be connected in a circuit?
a) 10 b) 05 c) 08 d) 12

Light point is fixed from the ground level to height of-
a) 2.75 mtr.
b) 2.5 mtr.
c) 2.13 mtr.
d) 1.8 mtr.


Which type of wiring is done in workshop?
a) Conduit pipe wiring
b) Cleat wiring
c) Batten wiring
d) L.C.C. wiring

Earth connection can be available from-
a) Pole/Ground
b) Meter
c) Fuse
d) Switch Board

Red colour wire is used as -
a) Earth wire
b) Phase wire
c) Neutral wire
d) Insulated wire

Cleat wiring is used for-
a) Temporary lighting at dry places
b) Permanent lighting at dry places
c) Both used (a) and (b)
d) None of these

Refrigerator, Air conditioner, Microwave oven, washing machine :need socket/plug with the minimum capacity of
a) 16 amp.
b) 2.5 amp.
c) 6 amp.
d) 10 amp.

Which material is used for wiring continuous busbar?
a) Aluminum
b) Copper
c) Both (a) and (b)
d) None of these

For what voltage level are the screwed conduit circuit used-
a) Less than 250 volt
b) For voltage between 250 volt- 600 volt
c) For voltage above 600 volt
d) None of these


Which among these is a method of wiring?
a) Joint box
b) Tee system
c) Loop in system
d) All of these

An electric bulb can work from-
a) D.C. supply only
b) A.C. supply only
c) Battery Supply only
d) Al of these

Lux is a unit of illumination-
a) It is equal to foot candle
b) It is less than foot candle
c) It is more than foot candle
d) It has no relation with foot candle

Light-
a) Is a form of electricity energy b) Is a form of heat energy
c) Consist of electromagnetic waves
d) Consist of shooting particles

Colour of light depends upon-
a) Wave length
b) Frequency of the wave
c) Speed of the light
d) (a) and (b) above

One foot candle is equal to-
a) 1/10 lux
b) 10 lux
c) 100 lux  
d) 1000 lux


In a sodium vapour lamp, the discharge is first started in the-
a) Neon gas
b) Nitrogen gas
c) Argon gas
d) Krypton gas

Which lamp cannot sustain much voltage fluctuation?
a) Incandescent lamp
b) Fluorescent lamp
c) Mercury vapour lamp
d) Sodium vapour lamp

Filament lamp at starting will take current-
a) Equal to its full running current
b) Less than its full running current
c) More than its full running current
d) None of these

Illumination of one lumen per sq. meter is called-
a) Ft. candle
b) Candela
c) Lux
d) Lumen, meter

The following discharge lamp needs separate choke:
a) Fluorescent lamp
b) Sodium vapour lamp
c) Mercury vapour lamp
d) All of these lamps

Fluorescent tube is coated from inside with white powder. This is done to-
a) Change the colour of light emitted to white
b) Improve che appearance
c) Increase the light radiations due to secondry emission
d) Improve its life

Which part is the "brain" of the computer?
a) Monitor
b) CPU
c) RAM
d) ROM

The permanent memory built into your computer is called -
a) RAM
b) CPU
c) ROM
d) CD - ROM

Which of the following is not an input device?
a) Monitor
b) Keyboard
c) Joystick
d) Microphone

Which of the following is not an output device?
a) Monitor
b) Printer
c) Speaker
d) Keyboard

Which device allows your computer to talk to other computer over a telephone line as well as access the internet?
a) RAM
b) CD-ROM drive
c) Modem
d) Hard drive

Which of the following is an operating system you would be using on the computer?
a) Internet Explorer
b) Netscape
c) Microsoft word
d) Microsoft windows

Which of these is not a computer manufacturer?
a) IBM
b) Applé
c) Microsoft
d) Sun

Jan18 MECHANIC MOTOR VEHICLE THEORY SENESTER III

Jan18 MECHANIC MOTOR VEHICLE THEORY SENESTER III

A mechanism which enables to the rotary motion of one shaft to another shaft at the same axis is called —
a) Crank
b) Differential
c) Clutch
d) Fly wheel

The main advantage of a good clutch is —
a) Good power transmission
b) Rapid engagement
c) Rapid disengagement
d) Large size

The cushioning springs in clutch plate are used to reduce
a) Vibrations
b) Jerks
c) Vehicle speed
d) NC ne of these

The clutch disc is positioned between the flywheel and the
a) Engine
b) Crankshaft
c) Pressure plate
d) Differential

The diaphragm clutch is generally used in
a) Modem cars
b) Dual mass flywheel
c) Tractors
d) Automatic transmission

"Clutch slippage" when the clutch is engaged is particJlarly noticeable —
a) At low speed
b) At Idling
c) During acceleration
d) While starting the engine

Most ofthe vehicles having automatic transmission, connect the engine to the gearbox through
a) Multi-plate clutch
b) Dog clutch
c) Magnetic clutch
d) Fluid clutch (fluid coupling or torque converter)

The synchronizer hub is attached with main shaft through
a) Synchronizer key
b) Shifl fork
c) Synchronizer ring
d) Splines inside the hub
If the tractive effort is the highest -(ör a given velocity, then vehicle must be in —
a) Top gear
b) Third gear
c) Second gear
d) First gear

The component in the torque converter which allows multiplication of the torque is -
a) Pump
b) Stator
c) Turbine
d) Impeller

The main disadvantage of sliding mesh transmission is —
a) High noise level
b) Low mechanical efficiency
c) High skilled required by the driver
d) All of these

The purpose of synchromesh mechanism is to
a) Run the driving and driven gear shafts at different speed
b) Synchronize the speed of driving and driven gear shafts
c) Increase the torque
d) Decrease the torque

In simple planetary gear, the member which increases the torque is —
a) Ring — gear
b) Sun-gear
c) Planet carrier
d) None of these

In a torque converter, the maximum torque multiplication occurs at --
a) Stop
b) Low speed
c) Medium speed
d) High speed

The functions of Electronically controlled automatic transmissions is to
a) Downshift automatically when going downhill to control speed
b) Up shift automatically when braking on a slippery surface
c) Prevent the up shift when taking a turn
d) All ofthe above

In Hydraulic fluid controlled automatic transmission, the shifting of gears is based on
a) Govemor and throttle pressure b) Only governor pressure
c) Only throttle pressure
d) None of these

The probable cause for gear jumps out of mesh is.
a) Weak spring or fork rod
b) Flywheel housing and gearbox out of alignment
c) Worn out teeth of sleeve or gears
d) Any of the above

Interlocking mechanism is provided in the shift mechanism of manual transmission is to-
a) Prevent shifting of two gears simultaneously
b) Prevent shifting of reverse gear
c) Facilitate the gear selection
d) All of the above

In a simple gear train if number of idle gear is even then the direction of motion of driven gear will be-
a) Same as driving gear
b) Opposite to the driving gear
c) Depending on number of teeth on the driving gear
d) Depending on number of teeth on the driven gear

The smaller gears inside the differential casing are-
a) Pinion gears
b) Sun gears
c) Ring gears
d) None of these

The type of rear axle used in trucks is-
a) Semi floating b) Fully floating
c) Three quarter floating
d) None of these

The limited slip differential (LSD) mechanism comes in action when-
a) Driving on bumpy roads
b) One tyre encounters a slippery section of road
c) When cornering at high speed
d) All of the above

In most of the modern cars which type of drive is employed on the wheels-
a) Front 2 — wheel drive
b) Rear 2 — wheel drive
c) 4 — wheel drive
d) All wheel drive

Most popular manual steering gear for cars is-
a) Worm and wheel type
b) Worm and nut type
c) Rack and Pinion type
d) Re — circulating ball type

One purpose of re-circulating ball type steering gear is to reduce-
a) Toe out during tum
b) Operating friction
c) Operating cost
d) None of these

The power steering pump is-
a) Belt driven by camshaft
b) Chain driven by crank shaft
c) Chain driven by cam shaft
d) Belt driven by crank shaft

The purpose of caster is to-
a) Ensure steering stability
b) Reduce the rolling resistance which the tyres may encounter during a tum
c) Enables the vehicle to be towed easily
d) Cancel the tendency of toe-out

The elecm)nic power steering (EPS) system control unit controls the assist motor based on signals of-
a) Road resistance, steering turning speed and vehicle speed
b) Road resistance, steering turning direction and engine speed
c) Road resistance, steering turning direction and vehicle speed
d) Road resistance, steering turning speed and engine speed

The effect of excessive camber is-
a) High steering alignment torque   b) Hard steering
c) Too much traction d) Un even tyre wear

The function which allows the driver to raise or lower the steering wheel is-
a) Power steering system
b) Tilt steering system
c) Air bag system
d) Rack and pinion type steering system

Which of the following can be adjusted by modifring the tie — rod attachment length?
a) Camber
b) Caster
c) Toe-in or Toe-out
d) Steering gear ratio

The name of component that connects the rack to the steering knuckles is-
a) Tie rod
b) Sector arm
c) Pivot
d) Spline

The vehicle ride will be comfortable if-
a) Un-sprung weight is kept minimum
b) Un-sprung weight is kept maximum
c) Sprung weight is kept minimum
d) Vehicle weight is kept minimum

The spring commonly used in modern cars is-
a) Semi elliptical leaf spring
b) Coil spring
c) Quarter elliptical leaf spring
d) Elliptical leaf spring

The part which permits variation in the distance between the spring eyes of a leaf spring   as the spring flexes, is called-
a) U — bolt b) Shackle

c) Leaf d) Bush

In which type of suspension the compressed air is necessary-
a) Rigid axle suspension
b) Air suspension
c) Mc-Persion strut suspension
d) Double wishbone suspension

A damper is also known as-
a) Torsion bar
b) Spring
c) Stabilizer
d) Shock absorber

An under -- inflated tyre wear out more-
a) Near centre
b) Near edge
c) In cross section
d) In lateral direction

The part ofthe tyre which contacts the road surface is called-
a) Carcass
b) Bead
c) Tread
d) Ply

The term "ply rating" with reference to a tyre refers to the-
a) Actual number of plies
b) Recommended inflation pressure
c) Aspect ratio
d) Rated strength

The efficiency of mechanical brakes is usually-
a) 30-40%
b) 40-50%
c) 50-60 %
d) 60-70%

'Brake Fade' is-
a) Loss of pedal free play
b) Loss of hydraulic fluid
c) Loss of co-efficient of friction
d) Change of colour of the lining due to oil soaked by lining


The brake bleeding process removes from the hydraulic brake system.
a) Air
b) Vacuum
c) Excess fluid
d) Excess pressure

The role of Antilock Brake System (ABS) is that-
a) It reduces the vehicle's stopping distances
b) It minimizes brake fade
c) It maintains directional control during braking by preventing the wheels from locking
d) It prevents nose during braking and thereby postpones locking of the wheels

When the hydraulic brake pedal is pressed by the driver and feels 'spongy' it indicates that-
a) Brake shoe clearance is excessive
b) System contains air
c) System is in good condition
d) Brake fluid require change

Which of the following problem is caused due to wheel imbalance?
a) Steering wheel vibration
b) Poor acceleration
c) Reduced fuel efficiency
d) Road noise

The purpose oftyre rotation on automobile is to-
a) Avoid ply separation
b) Equalize wear
c) Get better ride
d) None of these

If driving incense for a privately driven vehicle is expired then you can get your license renewed for a maximum period of-
a) 3 years from the date of expiry b) 4 year from the date of expiry
c) 5 years from the date of expiry d) 6 years from the date of expiry

For a new petrol run private vehicle, the initial fitness certificate is valid for-
a) 20 years
b) 15 years
c) 10 years
d) 05 years

The violation of which road signs is a legal offence?
a) Mandatory sign
b) Cautionary signs
c) Informatory signs
d) Any of these

Jan18 MECHANIC AGRICULTURE MACHINERY, MECHANIC MOTOR VEHICLE THEORY SEMESTER -1

Jan18 MECHANIC AGRICULTURE MACHINERY, MECHANIC MOTOR VEHICLE THEORY
SEMESTER -1

What is first aid?
a) Completing a primary survey
b) The first help given to injured
c) Assessment of loss
d) Treating an injured

The following is indirect cost of accident: -
a) Money paid for treatment
b) Compensation paid
c) Cost of lost time of injured
d) All of these

Class A fire consists of fire due to: -
a) Wood
b) Oil
c) Transformer
d) Chemical

Minimum reading taken by micrometer screw gauge is: -
a) 0.1 cmb) 0.01 mm
c) 0.1 mmd) 0.01 m

Which of the following is hardest material?
a) Copper
b) Ceramics
c) Steel
d) Diamond

File used for wood work is: -
a) Single cut file
b) Double cut file
c) Rasp cut file
d) None of these

What is mean by the rate of flow of an electric charge?
a) Electric current
b) Electric potential
c) Electric resistance
d) None of these

Which type of nut prevents slipping while tightening?
a) Square nut
b) Hexagonal nut
c) Castle nut
d) None of these

Annealing improves: -
a) Grain size
b) Mechanical properties
c) Electrical properties
d) All of these

Which of the following joints have high corrosion resistance?
a) Welded joint  
b) Riveted joint
c) Bolted joint
d) None of these.

An "n" type semiconductor is: -
a) Positively charged
b) Negatively charged
c) Electrically neutral
d) None of these

The positive plates of nickel iron cell is made by:
a) Nickel hydroxide
b) Lead peroxide
c) Ferrous hydroxide
d) Potassium hydroxide

Which one is best suited to extinguishing oil or flammable liquid fire?
a) Soda acid
b) Vaporizing liquid
c) Foam
d) Dry chemical

Range of measuring tape is:
a) 1 meter
b) Several meters
c) 2 meters
d) 1 Kilometer

Cutting forces at the cutting tool can be measured by: -
a) Dynamometer
b) Viscosity meter
c) Sine bar
d) Combination set

Check list for job safety analysis consists of:
a) Work area, material, machine, tools
b) Men, machine, material, tools
c) Men, machine, work-areas, tools
d) Men, work area, material, tools
 
A connecting rod is made by: -
a) Casting  
b) Drawing
c) Forging
d) Extrusion

Minimum reading of Vernier calipers is: -
a) 1 mm  
b) I cm
c) 0.1 mm
d) 0.1 cm

What is the unit of potential difference?
a) Ohm
b) Volt meter
c) Volt
d) Ampere meter

Which one is the example of plastic welding?
a) Gas welding
b) Arc welding
c) Forge welding
d) Thermit welding

Which of the following cutting condition is more affects the tool wear?
a) Cutting speed
b) Feed
c) Depth of cut
d) None of these

A battery consists of:
a) Diodes
b) Circuits
c) Generator
d) Number of cells

Industrial safety management is the branch of management which is concerned with hazards from the industries.
a) Reducing
b) Controlling
c) Eliminating
d) All of these

Which of the following tools are generally manufactured by powder metallurgy?
a) Low carbon steel
b) High carbon steel
c) Abrasives
d) Cemented carbide

When a pure semiconductor is heated, its resistance
a) Goes up
b) Goes down
c) Not changed
d) Can't say

A screw jack is used where do we need
a) Rotational motion
b) Linear motion
c) Both (a) & (b)
d) None of these

The clearance angle is provided on the tools due to: -
a) Strength the tool
b) Shear off the metal
c) For easy flow of chips
d) Prevent the tool from rubbing on work piece

The following is used to check the diameters of holes:
a) Plug gauge
b) Ring gauge
c) Slip guage
d) Standard screw pitch gauge

In oxy-acetylene welding colour of oxygen cylinder is: -
a) Red
b) Maroon
c) Black
d) Brown

Materials are softened by: -
a) Carburising
b) Tempering
c) Normalising
d) Annealing

Which property is used to oppose the flow of current?
a) Potential difference
b) Capacitance
c) Inductance
d) Resistance

The following class of fire occurs in electrical equipment: -
a) Class A fires
b) Class B fires
c) Class C fires
d) All of these

Which type of thread is used in screw jacks?
a) V thread
b) Acme thread
c) Square thread
d) None of these

Water is used to extinguish?
a) Class A fires
b) Class B fires
c) Class C fires
d) All of these

The following is generally provided with limit switch to prevent motion beyond preset   limit: -
a) Hoists
b) Machine tables
c) Conveyors
d) All ofthese

Sulphation in a lead acid battery occurs due to: -
a) Heavy charging
b) Fast charging
c) Slow charging
d) Incomplete charging

Which one of the following sequences will give the best accuracy as well as surface finish?
a) Drilling, Reaming, Grinding
b) Drilling, Boring, Grinding
c) Drilling, Reaming, Lapping
d) Drilling, Reaming, Electroplating

What is the SI unit of electric current?
a) Ampere
b) Ohm
c) Faraday
d) None of these

Which one is not the pan of a two stroke petrol engine?
a) Piston
b) Valves
c) Connecting rod
d) Spark plugs

Acetylene can be prepared by chemical reaction between: -
a) Water & calcium carbide
b) Water & chemical carbonate
c) Hydrogen & calcium carbide
d) Hydrogen & chemical carbonate

Which flame is suitable for welding of nonferrous metals?
a) Oxidising flame
b) Carbuising flame
c) Neutral flame
d) None of these

As the temperature of a transistor goes up, the base emitter resistance: -
a) Decreases
b) Increases
c) Remains the same
d) None of these

What is the frequency of domestic power in India?
a) 105 Hz
b) 60 Hz
c) 210 Hz
d) 50 Hz

The capacity of a cell is measured in
a) Ampere
b) Ampere-hour
c) Watts
d) Watts-hours

The following is not used to measure angles: -
a) Bevel protector
b) Calibrated levels
c) Clinometers
d) Optical flats

Which of the following gas mixture is not used in Gas Tungsten arc welding?
a) Argon-Helium
b) Argon-Nitrogen
c) Argon-Hydrogen
d) Argon-Carbon dioxide

Heat engine uses energy to produce mechanical work.
a) Thermal
b) Fluid
c) Kinetic
d) Electric

The degree of closeness of the measured value of certain quantity with its true value is known as: -
a) Accuracy
b) Precision
c) Standard
d) Sensitivity

In an automobile engine, indication of knocking is available in the form of:
a) Light
b) Gas
c) Sound
d) None of these

A transistor is a operated device.
a) Current
b) Voltage
c) Both (a) & (b)
d) None of these