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### Wireman theory sem 2 july 2015 questions

Wireman theory sem 2  july 2015 questions

Which fire extinguisher is suitable for a live electrical fire?
A Halon    B Water    C Foam    D Liquid chemical

You have taken permit to work on a over head line and the overhead line switched 'off. Before undertaking the repair work on the OH line, you have to
A  equip yourself with insulated gloves
B  earth the line conductors
C  measure the line to ground insulation resistance
D  earth metai O.H line poles

Which artificial resuscitation method is suitable to the victim, whose mouth closed tightly?
A  Schafer's method    B  Mouth to mouth method
C  Nelson's Method    D  Holgen- Nelson Method

There are several factors are caused for electric shocks. What is the prime reasons for seventy of electric shock?
A  The magnitude of voltage is more
B  The magnitude of current and duration of contact
C  The magnitude of the body resistance is high
D  The magnitude of the load current of the circuit

What is the another name of single ended open jaw adjustable spanner?
A  Double ended spanner    B  Monkey wrench
C  Ring spanner                  D  Socket (box) spanner

Which type of Insulating tapes are available in sheets and rolls and used for motor connecting leads?
A  Varnished cambric tapes   B  Rubber tape   C  Friction tape    D  PVC tape

A solid substance (conductor) or an insulated conductor subjected to tensile stress with or without screen is called..............
A cable     B core    C wire    D insulating tape

If the cable contains one or more cores each formed as a group of wires, having small diameter is known as...............
A cable  B wire C flexible cable  D armoured cable

As per NEC, the phase apparatus (output) A.C system in Alpha-numeric notation is represented as...................
A)  U L2> L3, N     B)  R, Y. B, N     C)  A, B, C, N   D)  U. V, W, N

Though four branch circuits are planned for a domestic installation, only one cable was connected from the four circuits to the neutral link. This wiil result in.........................
A  all lamps give more than normal brightness   B  over loading of the phase cable
C  saving of cable for the customer                     D  neutral conductor gets over heated

As per IS recommendations, the distribution boards should not be fixed at a height not more than a certain value from floor level. What is this height?
A 1.0 metre    B 1.3 metre    C 2.0 metre    D 2.25 metre

Normal current capacity of a certain cable is 16 Amperes. If the circuit is protected by the course excess current protection, then the current capacity of the cable will be....................
A 12 A     B 13A    C 16A   D 20 A

The main switch is used in single phase supply is to be provided with..............
A  fuse in both line and neutral
B  a fuse in the line and a link in the neutral
C  a link in the line and a fuse in the neutra!
D  thicker fuse wire in the phase and thinner fuse wire in the neutral

What is the name of the material used for harnessing cables while making wiring connection of motor?
A  P.V.C saddles      B  P.V.C straps      C  P.V.C trays     D  P.V.C casting

For finding the earth resistance of an earth electrode 20v test voltage is used. Four tests are conducted under different distance / position of spikes. Current measured in each test is 3.8A, 1.9A,2.6Aand3.1A Which one of the calculated value of resistance to be considered?
A Lowest resistance value        B Hi&hest resistance value
C Average of the four values    D Average of highest and lowest values

Which device is the examples for coarse excess current protection?
A MCB   B HRC    C Cartridge fuse    D Rewirablefuse

The fusing factor for HRC fuse is............
A 2.0   B 1.7   C 1.4   D 1.1

The main advantage of concealed wiring than the surface conduit wiring is that..................
A it requires less material   B fault location and rectification is easy
C installation cost is less D inspection more easy

The only wiring which can be taken through shortest route in the roof and requires less right angle bends is......................
A casing and capping       B batten wiring
C conduit surface wiring   D conduit concealed wiring

In wiring installation system tree system is most suitable for.....................
A  multi-storey building             B  single storey building
C  guest house accommodation  D  multi room bungalows

The leakage current flowing in an installation is due to................
A  improper earthing    B high earth loop impedance  C  insulation failure   D  low earth resistance

What is the purpose of Earth leakage circuit breaker in building wiring  installation?
A It protects the appliances from excess current
B It prevents the waste of electrical energy consumption
C It stabilises the supply voltage
D It protects the energy meter from short circuit

For pipe earthing the minimum length of pipe electrode should not be less than........................
A  2.0 m    B  2.5 m   C  3.0 m  D 3.5 m

For plate earthing, the size of the plate should not be less than..................
A  600 mm x 600 mm   B 400 mm x 400 mm  C 300 mm x 300 mm  D 200 mm x 200 mm

What is the name of the temperature regulating component of an Automatic electric iron?
A Pressure plate    B Thermostat   C Solid plate   D Heating element

The purpose of terminal connectors used to...........................
A divide into number of branch circuits
B provide earth connecting of the wiring system
C extend the length of the wire without jointing
D provide the neutral connections of the wire

The ceiling fan makes noise during running due to....................
A defective or leaky capacitor                  B  open in regulator resistor /switch
C worn out bearing and absence of grease    D  low applied voltage

The capacitor used in the fan motor is to be connected is.....................
A  series to the starting winding   B  parallel to the starting winding
C  series to the main winding       D  parallel to the main winding

As per BIS the measured insulation resistance of any wiring installation should not be less than...............
A 100 ohm    B 1000 ohm     C 100 k.ohm    D 1000 k.ohm

The height of the bottom of switch board installed from the floor shall be not less than.............
A 900 mm (3 feet)      B 1200 mm (4 feet)
C 1350mm (4.5 feet)   D 1500 mm (5 feet)

Equipment earthing is necessary to give protection against....................
C  the danger of electric shocks       D  the high temperature of the conductors

The earth tester works on the principles of.......................
A potential dividing method   B fall of potential method
C fall of resistance method      D current dividing method

Which type of distribution system is suitable for flats and other commercial buildings which is continued through out the height of the building?
A  Bus bar chamber                   B  Raising mains
C  Vertical distribution mains    D  Bare conductors in trunk age

As per IE rules, the voltage at the point of commencement of supply in the case of high or Extra high voltage, shall not vary more than..............
A 12.5 percentage    B 10.0 percentage   C 5.0 percentage  D 2.5 percentage

The clearance between the conductors of opposite polarity or phase and between the conductors shall be at least.......................
A  5.0 cm    B  3.5 cm   C  2.5 cm  D  2.0 cm

The cross sectional area of copper conductor for power wiring shall be not less than............
A   0.5 mm2    B   1.15 mm2    C  1.5 mm2  D  2.5 mm2

The material is used in an electric oven as heating element is.....................
A copper   B brass   C eureka    D nichrome