மாணவர்களே வினாக்கள் வீடியோ வடிவில் உங்களுக்காக கிளிக் செய்யுங்கள் லிங்கை


மாணவர்களே வினாக்கள் வீடியோ வடிவில் உங்களுக்காக கிளிக் செய்யுங்கள் லிங்கை
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T/R S 3

Turner theory sem 3 jan 2016 questions

High carbon steel tools are used for turning at............
A  higher cutting speed than HSS   B  lower cutting speed than HSS
C  same cutting speed as HSS         D  same cutting speed as carbide tipped tool

Carbon percentage in a HSS tool is
A  0.-2to0.3%   B  0.6 to 0.75%   C  0.75 to 1.0%  D  1 to 2 %

The most commonly used proportions of the alloying elements in HSS are............
A  18% tungsten 4% chromium 1% vanadium
B  18% chromium 4% cobalt 1 % tungsten
C  18% cobalt 4% tungsten 1 % chromium
D  18% vanadium 4% carbon 1 % cobalt

Easiness in machining with regard to tool life, surface finish and power consumption is called.............
A machinability   B hardenability  C  rate of metal removal   D  surface finish rating

The working principle of the dial test indicator is............
A  the linear motion is converted into reciprocating motion using slotted link
B  the linear motion is converted into rotary motion using rack and pinion
C  magnifications of small variation using lenses
D  magnifications by electronic means

Chip breaker in a tool is given to.................
A  break the chips into small pieces     B  have continuous chip
C  have curled chip                             D  have straight chip

Other name for ball turning is.............
A  form turning    B  convex turning   C  spherical turning  D  profile turning

A jig is a special device which..........
A  holds the job     B  locates the cutting tool   C  guides the tool
D  holds supports, locates job and guides the tool

The type of jig in which base plate is not available is................
A  plate jig    B  box jig    C  post jig   D latch jig

Sine bar is made of..........
A  high carbon steel  B high speed steel    C nickel steel     D stabilized chromium steel

The length of sine bar is the distance between..............
A one end to another end of the sine bar  B diagonal cross length of the sine bar
C centre to centre between the rollers      D outside to outside between the rollers

The purpose of the holes provided on the sides of the sine bar is for.........
A  easy handling
B  supporting the slip gauge
C  using as a reference while setting
D  to reduce the weight as well as to clamp the work piece

Calculate the rpm, when cutting speed is 120m/min and the diameter of work is 80mm.
A 402  B 442   C 482   D 502

Determine the machining time where / = 350, n = 637, s = 0.05 mm and cs= 130 m/min.
A 8.78 min   B 10.98 min    C 12.98 min    D 14.98 min

Which one of the following grade of slip gauge is recommended for workshop use?
A 00  B 0  C i  D ii

Negative rake angle is used for.
A  finishing cut  B  light depth of cut  C  medium depth of cut  D  heavy depth of cut

Standard wheel marking is given below. A 60 J8 V, where the letter, where V represent.............
A abrasive  B grain   C grit   D bond

Aluminium oxide grinding wheels are used to grind material of...........
A  low tensile strength    B  medium tensile strength
C  high tensile strength   D   carbide tipped tool

The minimum dimension that can be measured in inside micrometer is......
A   13.00 mm  B  20.00 mm  C  25.00 mm  D  38.00 mm

The least count of the inside micrometer is.........
A  0.001 mm   B  0.01 mm C  0.10 mm  D   1.00 mm

A lubricant is used with the objective of..............
A  increasing fractional heat
B  increasing resistance
C  decreasing fractional resistance
D  providing direct contact

A lubricant can posses high...................
A volatility     B acidity    C oiiiness   D rusting agent

A good lubricant should have.............
A  low viscosity - index B  high viscosity - index
C  low fire point  D  high volatility

Most important property of lubricating is..........
A  its fire point     B  cloud point    C  oiliness   D  viscosity index

A fixed steady rest is used to support........
A  the tool rigidly to avoid chatter during operation
B  long shafts that are being threaded for their full length
C  support work pieces during facing large diameter work pieces with short length
D  support long work pieces held in chuck, to perform operation at the overhanging end

To fix an irregular shaped work piece on a lathe, which one of the following accessories is used?
A  3 jaw chuck    B  Driving plate   C  Face plate   D Catch plate

The function of a travelling steady is to..........
A  prevent bending of long shafts due to cutting force
B  avoid load on the lathe centres while turning long job
C   reduce the load on the cutting tool while turning
D  ensure to turn at higher cutting speed than recommender

Which one of the following statement refers to the tool line?
A  Time between starting and finishing job
B  Total time for turning work including regrinding of tool
C  Time between two successive regrinds
D  Time between starting of metal cutting and tool wear cut

To cut two start thread, a 24 teeth driver gear is fixed at stud as driver gear. After completion of first start and before starting of second start, the driver gear must be turned to........
A 24 teeth   B 18 teeth  C 12 teeth   D  6 teeth

The distance through which a screw thread advances axially in one turns is called........
A  pitch of thread    B  lead of thread     C  depth of thread  D  diameter of thread

The diameter of the external screw thread is checked by............
A  screw pitch gauge  B  thread ring gauge  C  screw thread micrometer   D  vernier caliper

The pitch of 3 start thread is the lead divided by...........
A 1  B 2   C 3   D 4

Tool maker's buttons are made of.
A plastic  B  cast iron   C  hardened steel  D bronze

Tool maker's buttons are used to...........
A  adjust the slackness in the guide ways of cross slide
B  alter the tool height
C  align the work for boring to a given datum
D  alter align between centres

A screw thread is formed on a cylindrical
surface by cutting.........
A  helical grooves  B  V - grooves   C  square grooves  D  half round grooves

The setting of lathe tool which respect to the work axis effects the value of.........
A  rake angle and clearance angle     B   rake angle and cutting angle
C  cutting angle and clearance angle  D  cutting angle and side rake angle

The width of the tool used to cut 10 mm pitch square thread is.........
A  10 mm B   7.5 mm C   5 mm  D  2.5 mm

The tip of a cemented carbide tool is joined on the shank by...............
A welding   B brazing   C soldering   D  clamping with screw

By which one of the following, a rnulti - start, thread is cut on a lathe?
A Chaser   B  Single - point tool   C  Die head  D  Split die

Which one of the following screw threads forms has an included angle of 29° between the flank of thread?
A  B.A thread    B  Acme thread   C  Butters thread  D  Knuckle thread

The special gear of 127 teeth or 63 teeth may be used to cut metric threads in a lathe having British lead screw is..........
A idle gear    B change gear    C translating gear  D compound gear

The major diameter of a square thread is 40 mm pitch is 5 mm. What is the minor diameter?
A   30 mm  B  32 mm  C  35 mm   D   36 mm

Turner theory sem 3 jan 2018 questions

The angle on which the strength of tool depend is-
a) Rake angle b) Clearance angle
c) Cutting angle d) Lip angle

The negative rake is usually provide on-
a) High carbon steel tool b) High speed steel tool
c) Cemented carbide tool c) All of these

Negative rake are used for-
a) Carbide tools b) Heavy tools
c) Harder material d) All of these

The angle made by the face of the tool and plane parallel to the base of Gutting tool is

called-
a) Rake angle
c) Cutting angle
b) Clearance angle
d) Lip angle

The cutting fluid mostly used for machining alloy steel is-
a) Water b) Soluble oil
c) Dry d) Sulphured mineral oil

The factor which affects the tool life is-
a) Tool geometry b) Cutting speed
c) Feed rate d) All of these

The tool life is said to be over if-
a) Surface finish is poor
b) There is sudden increase in cutting force and power consumption
c) Overheating and fuming due to heat of friction starts
d) All of the above

A grinding wheel is said to be of______if the abrasive grain can be easily dislodged.
a) Soft grade b) hard grade
c) Medium grade d) All of these

The Hard grade grinding wheels are denoted by the letters,
a) AtoH b)ItoP
c) QtoZ d)AtoP

A Coarse grained grinding wheel is used to grind-
a) Hard and brittle materials b) Soft and ductile materials
c) Hard and ductile materials d) Soft and brittle materials

For fast removal of materials during grinding a_grinding wheel is used.
a) Coarse grained b) Fine grained
c) Medium grained ' d) All of these

The purpose of Jig and fixture is to-
a) Increase production rate
c) Increase machining accuracy
b) Enable employ less skilled operators
d) All of these

A good lubricant for thread cutting operation is-
a) Mineral lard oil b) Water soluble oil
c) Graphite d) White lead

Tool life is most affected by machine-
a) Cutting speed
c) Feed and depth
b) Tool geometry
d) Microstructure of material being cut

It is possible to correlate tool life with the following property of the metai-
a) Grain size b) Toughness
c) Hardness d) Microconsitiuent

Tungsten content in the High speed steel tool cutting tool material
a) 16% b)4%
c) 18% d)0.6%

18-4-1 high speed steel contains following element in the ratio of 18-4-1.
a) Tungsten, Chromium, and vanadium      b) Chromium, vanadium, and Tungsten
c) Vanadium, Tungsten, and Chromium      d) None of these

The characteristics that enable one material to cut another is its relative-
a) Toughness b) Hardness
c) Resilience d) Ductility

High speed steel tool material contains carbon-
a) 0.6-1.0% b)2-4%
c) 4-6% d)6-10%

The angle between the face of tool, and line tangent to the machined surface at the cutting
point is known as-
a) Rake angle b) Cutting angle
c) Clearance angle d) Lip angle

Chip breakers are provided on cutting tools-
a) For safety of operators b) To minimize heat generation
c) To permit short segment chips d) To increase tool life

Tool life is said to be over when-
a) Finish of work becomes too rough
b) Cutter looks dull
c) Chips become blue
d) A certain amount of wear or cratering occurs on the flank

The grit, grade and structure of grinding wheels for specific operation are based on-
a) Grinder clearance b) Spindle size of the grinder
c) Diameter of wheels d) Speed at which the wheel is to be used

When it is required to run a grinding wheel safely at very high speed. Following bond
should be used-
a) Vitrified  b) Resinoid and Rubber
c) Shellac d) Silicate

Which of the following is not the angle measuring device?
a) Angle plate b) Sine bar
c) Angle gauge d) Screw thread micrometer

Accurate centering of work mounted in an independent chuck can be determined by using
a-
a) Centre gauge
c) Dial indicator
b) Height gauge
d) Micrometer

A sine bar is used to measure-
a) Surface roughness b) Gear profiles
c) Internal tapers d) External tapers

The purpose of using borax in brazing is-
a) Dissolve oxides when heating the work
b) Prevent the spelter from melting too quickly
c) Increase fluidity of braze material
d) Accelerate the formation of oxides on the work

When brazing is carried out-
a) A joint is made between two parts by molten spelter
b) The edges of the joint melt and run together
c) Spelter forms an alloy with flux
d) Flux acts as a connecting material

In soldering the melting point of filter metal is-
a) Below 420°C b) Above 420°C
c) Below 520°C d) Above 520°C

The composion of soft solder is-
a) Lead-37%, tin 63% b) Lead-67%, tin 37%
c) Lead-70%, tin 30% d) Lead-50%, tin 50%

Best coolant and lubrication for bras:-, copper and bronze i
a) Soluble oil
b) Water, soluble oil or sulphur based mineral oils
c) Mineral and fatty oils
d) Dry

Which of the following operations can be used on Centre lathe.
a) Grinding b) Milling

c) Drilling d)Allofthese .

In lathe, form tools are used to produce.
a) Cylindrical surfaces
b) Tapered surfaces
c) The surfaces which are neither cylindrical nor tapered
d) Threads

The following are the function of a jig-
a) Holding b) gating
c) Guiding d)Alloftnese

A fixture does not-      .     ' .
a) Holds the workpiece b) Locate the workpiece
Guide the tool «D All of these


Jigs are not used in-
a) Drilling b> Reaming
c) Tapping d) Milling

The following jig can be used for several different work pieces and operations,
a) Template jig b) Multi-station jig
c) Index jig d) Universal jig

A fixture is defined as a device which-
a) Hold and locale a workpiece and guide and controls one or more cutting tools
b) Hold and locate a workpiece during an inspection or for manufacturing a operation
c) Is used to check the accuracy of workpiece
d) All of the above

Multi thread are used to secure-
a) Low efficiency
c) High load lifting capacity
b) High efficiency
d) High mechanical advantage

External taper can be accurately measured with the help ol
a) Sine bar and slip gauges b) Dividing h
c) Precision balls and height guage d) Combinati

The axial advancement in one rotation of screw part is known as-------- of the threads.
a) Pitch
c) Pitch diameter
b) Lead
d) Helix angle

The distance from a point on one thread to the corresponding point on the next thread is
called.
a) Lead b) Pitch
c) Turn d) Crest

The angle included by the flanks of the thread-
a) Angle of thread b) Depth of thread
c) Depth of cut d) Slope of thread

Best coolant and lubrication for aluminium.
a) Soluble oil
b) Water, soluble oil or sulphur based mineral oils
c) Mineral and fatty oils or soluable oils
d) Dry

The diameter of a finish turned shaft can best be checked with a-
a) Combination set b) Dial indicator
c) Height gauge d) Micrometer screw gauge

The thread micrometer measures-
a) The major diameter of thread b) The minor diameter of thread
c) The effective diameter of thread d) The rod diameter of thread

A screw thread is designated as 1" B.S.P. thread, in 1 inch B.S.P. thread what 1"
indicates?
a) Major diameter of thread b) Minor diameter of thread
c) Pitch diameter of thread d) Hole diameter of Pipe

In a sine bar the standard length is measured from-
a) Edge to edge v
b) Between inner circumference of two buttons
c i Between out circumference of two buttons
d) Between the centers of two buttons

Work is usually required to be held in a vertical position for layout. For this purpose,It is
ciamped to-
a) Surface plate b) A machine bed
c) An angle plate d) A V block

Turner theory sem 3 jan 2017 questions

Which of the material generally used to manufacture twist drills?
a. HSS b. Carbide steel c. Diamond d. Cast steel

Which one of the following tool angle is provided to avoid rubbing of the body of the
with the work piece?
a Rake angle b. Helix angle c. Clearance angle     d. None ot these

HSS is tempered at:-
a. 220°C to 230°C     b. 230°C to 270°C    c. 280°C to 400°C    d. 550°C to 600°C

The commonly used proportions of alloying elements in HSS are-
a. 18% tungsten, 4% chromium and 1% vanadium
b. 18% chromium, 4% tungsten and 1% vanadium
c. 18% vanadium, 4% chromium and 1% tungsten
d. 18% cobalt, 4% chromium and 1% vanadium

Which one of the following tests is carried out after overhauling and reconditioning
machines?
a. Periodic acceptance test b. Geometrical test only
c .Performance test only d. None of these

The chip breaker on a lathe tool is essential when turning :-
a. Soft material b. Ductile material
c. Cast iron d. Hardened materials

Which one of the following is used to clamp the job in relation to the tool in mass production?
a jjo b. Fixture c. Housing d. Gauges

The tool made of cemented combide wear out faster at-
a. Slow speed b. Medium speed      c. Fast speeds d. Very fast speeds

Which one of the following is NOT the property of a good lubricant?
a. No change in viscosity due to variation in temperature
b. Reduces friction between machine parts
c. Takes up the surface pressure between sliding parts
d. Becomes thicker after prolonged use

The permissible deviation for leveling of machine is>
a. 0.03/100 mm b. 0.03 / 200 mm       c. 0.03 / 300 mm       d. 0.03 / 400 mm

Which one of the following factors will NOT influence the selection of the cutting speed?
a. Diameter of the work piece b. Work piece material
c. Tool material d. Operation to be performed

The hardening temperature of HSS tool
a. 1250°C b. 950°C  c. 850°C d. 750°C

Which among the following factors governs the selection of feed when turning a work piece?
a. Tool geometry b. Surface finish required
c. Types of coolant required d. All of these

If the pitch of a led screw is 6 mm and the pitch of the thread to be cut is 1.25 mm. then the
change of gears required are:-
a. Driving gears 40 & 120and Driven gears 50 & 20
b. Driving gears 50 & 20 and Driven gears 40 & 120
c. Driving gears 50 & 120 and Driven gears 40 & 20
d. Driving gears 40 & 20 and Driven gears 50 & 120

Which among the following statements is NOT correct:-
a. Jig is used for drilling operation b. Jig is used for planning operation
c. Jig is used for indexing operation d. Jig is used for boring operation


A sine bar is a precision instrument used to check the angular accuracy of tapered
components. Four or five equally spaced holes are drilled on the body of this sine
purpose of these holes is to:-
a. Handle the sine bar with ease b. Reduce the weight of the sine bar
c. Prevent distortion of the top surface        d. Add appearance to the sine bar

A fixed steady rest is used to:-
a. Support the tool rigidly to avoid chatter during operation.
b. Support long shafts that are being threaded for their full length.
c. Support workpieces during facing large diameter work pieces with short length.
d. Support long workpieces held in chuck, to perform operations at the overhanging end.

Rake angle is not provided on a form tool used to produce taper on a work piece. The reason
for this is-
a. To reduce grinding time of the tool
b. To reduce wastage of tool material
c. Taper angle is not affected by re-sharpening
d. For the tool to have large wedge angle

Which one of the following materials is used for manufacturing centre drills?
a. Cast steel b. High speed steel   c. Mild steel d. Cast iron

For plain turning a 60 mm diameter work piece using HSS tool with recommended cutting
speed of 30 meters/ min, the rpm should be>
a. 80 rpm b. 192 rpm c.l59rpm d. 318 rpm

Ratchet stop in the micrometer helps to
a. Control the pressure b. Lock the spindle
c. Adjust zero error d. Hold the work piece

In the process of soldering, you have noticed thatsolder not sticking to sufficiently heated
copper soldering bit when rubbed over solder bar. What step do you take to overcome the
problem?
a. Pre- heat the solder b. Clean the bit thoroughly
c. Change the soldering bit shape d. Rub the bit over solder for longer period

A lathe half centre is used:-
a. To support the work piece always b. To turn long work piece
c. Because it is easy to lubricate the work piece      d. To face the work piece up to the end
of the centre hole

A jig is a device which:-
a. Locate the work piece. b. Holds and supports the work piece
c. Guides the cutting tool d. Does all of these

Which one of the following is used for checking run out of the internal taper of machine
spindle?
a. Dial test indicator
b. Test mandrel and dial test indicator
c. Precision height gauge
d. Test mandrel and precision height gauge

During marking, the reference surface is provided by :-
a. Sketch of the job b. Work piece
c. Marking off table surface d. Surface gauge

Which one of the following tool angles is provided to avoid rubbing of the body of the tool
with the work piece:-
a. Rake angle b. Clearance angle    c. Helix angle d. None of these

Which among the following is NOT the purpose of a grease?
a. Carry away heat produced in bearing
b. Prevent metal-to-metal contact and reduce friction
c. Prevent entry of foreign material i.e. dust, dirt etc. in the bearing
d. Provide a cushion to a load and shocks

The slots provided on angle plate for:-
a. Accommodating bolts b. Hanging with hooks
c. Reducing its weight d. Aligninng the work

Preventive maintenance is-
a. The overall lubrication and repair work carried out by the maintenance
section in advance of the machine coming to breakdown
b. The maintenance work for any fault noticed during the work
c. Done to prevent the maintenance of machines
d. None of the above

You want to fix an irregularly shaped work piece on a lathe, which one of the following
accessories is the most appropriate?
a. Three-jaw self-centering chuck b. Driving plate
c. Faceplate d. Catch plate

Carbide tipped tool used for turning hard material is provided:-
a. Side rake angle b. Zero rake angle
c. Positive rake angle d. Negative rake angle

Major defference between the Surface plate and marking plate is :-
a. Surface plate is harder than marking plate
b. Surface plate is more precise than marking plate
c. Both Surface plate and marking plates are precise
d. Marking plate is harder than surface plate

A sine bar is available in standard sizes. Which one of the following is NOT a standard size
of the sine bar:-
a. 100mm b. 200 mm c. 300 ram d. 250 mm

Correct geometry of cutting tool is essential for its cutting efficiency. State the reason why
positive top rake and side rake are provided in its tool geometry:-
a. Increase tool life b. Reduces cutting force on the tool
c. Easy flow of chip d. Reduces friction and temperature generation

Find the time required to turn a job -
a. 2 minute 300 mm long from dia 40 mm to 38 mm
b. 2.5 min while the machine is running at 900 rpm
c. 1.98 min permissible depth of cut is 1 mm
d. 1.5 min feed is 0.16 mm/rev

A traveling steady is fixed at the saddle of a lathe. What is the function ol this steady rest:-
a. To prevent bending of long shafts due to cutting force.
b. To avoid load on the lathe centres while turning long shafts.
c. To reduce the load on the cutting tool while turning,
d. To ensure to turn at higher cutting speeds than recommended.

Carbide tipped tool with blue marking is used on a lathe. Which one of the following
materials can be machined with this tool:-
a. Brass b. Grey cast iron c. Steel d. Plastic

Which one of the following is NOT the use of the dial test indicator?
a. To check the parallelism of finished components
b. To compare the dimensions of finished components
c. To check concentricity of round components
d. To measure the dimensions of finished components

Which among the following tests is carried out after overhauling and reconditioning of
machine:-
a. Periodic acceptance test b. Geometrical test only
c. Performance test only d. None of these

The marking plate is made up of:-
a. High speed steel b. Hardened steel
c. Cast iron d. Granite

Lock nut in the micrometer is provided to:-
a. Control the movement of the spindle
b. Lock the reading after setting it over the work piece
c. Measure the work piece accurately
d. Lock the micrometer when it is not in use

Which type of holding device is suitable for holding eccentric job>
a. Three-jaw chuck b. Four-jaw chuck
c. Faceplate d. Magnetic chuck

Inserted HSS tool bits are more useful for the operation :-
a. Boring b. External threading
c. Internal threading d. All of these

Tool maker's buttons are used for:-
a. Aligning the work piece for boring to a given datum
b. Setting the tool at correct centre height
c. Adjusting the slackness in the guide ways of cross-slide
d. Holding the work piece firmly

TURNER THEORY
SEM-3 JAN2018

1. The angle on which the strength of tool depend is ...
a) Rake angle
b) Clearance angle
c) Cutting angle
d) Lip angle

The negative rake is usually provide on ......
a) High carbon steel tool
b) High speed steel tool
c) Cemented carbide tool
d) All of these

Negative rake are used for ...
a) Carbide tools
b) Heavy tools
c) Harder material
d) All of these

The angle made by the face of the tool and plane parallel to the base of cutting tool is   called .....
a) Rake angle
b) Clearance angle
c) Cutting angle
d) Lip angle

The cutting fluid mostly used for machining alloy steel is ......
a) Water
b) Soluble oil
c) Dry
d) Sulphured mineral oil

The factor which affects the tool life is .......
a) Tool geometry
b) Cutting speed
c) Feed rate
d) All of these

The tool life is said to be over if ....
a) Surface finish is poor
b) There is sudden increase in cutting force and power consumption
c) Overheating and fuming due to heat of friction starts
d) All of the above

A grinding wheel is said to be of ............. if the abrasive grain can be easily dislodged.
a) Soft grade  
b) Hard grade
c) Medium grade  
d) All of these

The Hard grade grinding wheels are denoted by the letters.
a) A to H
b) I to P
c) Q to Z
d) A to P

A Coarse grained grinding wheel is used to grind ......
a) Hard and brittle materials
b) Soft and ductile materials
c) Hard and ductile materials
d) Soft and brittle materials

For fast removal of materials during grinding a
........... grinding wheel is used
a) Coarse grained
b) Fine grained
c) Medium grained
d) All bf these

The purpose of Jig and fixture is to ........
a) Increase production rate
b) Enable employ less skilled operators
c) Increase machining accuracy
d) All of these

A good lubricant for thread cutting operation is ......
a) Mineral lard oil
b) Water soluble oil
c) Graphite
d) White lead

Tool life is most affected by machine .......
a) Cutting speed
b) Tool geometry
c) Feed and depth
d) Microstructure of material being cut

It is possible to correlate tool life with the following property of the metal ........
a) Grain size
b) Toughness
c) Hardness
d) Microconsitiuent

Tungsten content in the High speed steel tool cutting tool material is ..........
a) 16%  b) 4%   c) 18%   d) 0.6%

18-4-1 high speed steel contains following element in the ratio of 18-4-1.
a) Tungsten, Chromium, and vanadium 
b) Chromium, vanadium, and Tungsten
c) Vanadium, Tungsten, and Chromium 
d) None of these

The characteristics that enable one material to cut another is its relative .......
a) Toughness
b) Hardness
c) Resilience
d) Ductility

High speed steel tool material contains carbon .......
a) 0.6-1.0%
b) 2-4%
c) 4-6%
d) 6-10%

The angle between the face of tool, and line tangent to the machined surface at the cutting point is known as .........
a) Rake angle
b) Cutting angle
c) Clearance angle
d) Lip angle

Chip breakers are provided on cutting tools .........
a) For safety of operators
b) To minimize heat generation
c) To permit short segment chips
d) To increase tool life

Tool life is said to be over when .......
a) Finish of work becomes too rough
b) Cutter looks dull
c) Chips become blue
d) A certain amount of wear or cratering occurs on the flank

The grit, grade and structure of grinding wheels for specific operation are based on .......
a) Grinder clearance
b) Spindle size of the grinder
c) Diameter of wheels
d) Speed at which the wheel is to be used

When it is required to run a grinding wheel safely at very high speed. Following bond should be used .......
a) Vitrified
b) Resinoid and Rubber
c) Shellac
d) Silicate

Which of the following is not the angle measuring device?
a) Angle plate
b) Sine bar
c) Angle gauge
d) Screw thread micrometer

Accurate centering of work mounted in an independent chuck can be determined by using
a) Centre gauge
b) Height gauge
c) Dial indicator
d) Micrometer

A sine bar is used to measure .......
a) Surface roughness
b) Gear profiles
c) Internal tapers
d) External tapers

The purpose of using borax in brazing is ...........
a) Dissolve oxides when heating the work
b) Prevent the spelter from melting too quickly
c) Increase fluidity of braze material
d) Accelerate the formation of oxides on the work

When brazing is carried out ........
 a) A joint is made between two parts by molten spelter
b) The edges of the joint melt and run together
c) Spelter forms an alloy with flux d) Flux acts as a connecting material

In soldering the melting point of filter metal is .......
a) Below 420°C
b) Above 420°C
c) Below 520°C
d) Above 520°C

The composion of soft solder is ..........
a) Lead-37%, tin - 63%
b) Lead-67%, tin - 37%
c) Lead-70%, tin - 30%
d) Lead-50%, tin - 50%

Best coolant and lubrication for bras, copper and bronze is .....
a) Soluble oil
b) Water, soluble oil or sulphur based mineral oils
c) Mineral and fatty oils
d) Dry

Which of the following operations can be used on Centre lathe?
a) Grinding
b) Milling
c) Drilling
d) All of these

In lathe, form tools are used to produce.
a) Cylindrical surfaces
b) Tapered surfaces
c) The surfaces which are neither cylindrical nor tapered
d) Threads

The following are the function of a jig ........
a) Holding
b) Locating
c) Guiding
d) All of these

A fixture does not .......
a) Holds the workpiece
b) Locate the workpiece
c) Guide the tool  
d) All of these

Jigs are not used in ........
a) Drilling
b) Reaming
c) Tapping
d) Milling

The following jig can be used for several different work pieces and operations.
a) Template jig
b) Multi-station jig
c) Index jig
d) Universal jig

A fixture is defined as a device which ........
a) Hold and locate a workpiece and guide and controls one or more cutting tools
b) Hold and locate a workpiece during an inspection or for manufacturing a operation
c) Is used to check the accuracy of workpiece
d) All of the above

Multi thread are used to secure ......
a) Low efficiency
b) High efficiency
c) High load lifting capacity
d) High mechanical advantage

External taper can be accurately measured with the help of .......
a) Sine bar and slip gauges
b) Dividing head
c) Precision balls and height guage
d) Combination set

The axial advancement in one rotation of screw pan is known as of the threads.
a) Pitch
b) Lead
c) Pitch diameter
d) Helix angle

The distance from a point on one thread to the corresponding point on the next thread is called.
a) Lead
b) Pitch
c) Turn
d) Crest

The angle included by the flanks of the thread ........
a) Angle of thread
b) Depth of thread
c) Depth of cut
d) Slope of thread

Best coolant and lubrication for aluminium.
a) Soluble oil
b) Water, soluble oil or sulphur based mineral oils
c) Mineral and fatty oils or soluable oils
d) Dry

The diameter of a finish turned shaft can best be checked with a ........
a) Combination set
b) Dial indicator
c) Height gauge
d) Micrometer screw gauge

The thread micrometer measures........
a) The major diameter of thread b) The minor diameter of thread
c) The effective diameter of thread  
d) The rod diameter of thread

A screw thread is designated as 1" B.S.P. thread, in 1 inch B.S P. thread what 1"   indicates?
a) Major diameter of thread
b) Minor diameter of thread
c) Pitch diameter of thread
d) Hole diameter of Pipe

In a sine bar the standard length is measured from.......
a) Edge to edge
b) Between inner circumference of two buttons
c) Between out circumference of two buttons
d) Between the centers of two buttons

Work is usually required to be held in a vertical position for layout. For this purpose, lit is
clamped to ........
a) Surface plate
b) A machine bed
c) An angle plate  
d) A V block



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