Electrical house wiring MCQ:

49)	Energy metre for connected, has ________ terminals

a. 2

b. 4

c. 6

d. 8

Ans. b

50)	Aluminium conductor cables can be joined by

a. gas welding

b. soldering

c. compression

d. thermit welding

Ans. c

51)	The fluorescent tube in comparison to tungsten filament lamp has the advantage of

a. low cost

b. longer life

c. simple installation

d. more brightness

Ans. b

52)	MCB is a device that provides definite protection to the wiring installation and sophisticated equipment against

a. overcurrent

b. short circuit

c. theft

d. both a and b

Ans. d

53)	MCB stands for

a. main circuit board

b. main circuit breaker

c. miniature circuit breaker

d. all of these

Ans. c

54)	Which are the main reason to failure of any lamp

a. defective starter

b. defective choke

c. defective and loose holders

d. any of the above

Ans. d

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Electrical house wiring MCQ:

 

43)	The rating of fuse wire is always expressed in

a.  volts

b. amperes

c. ampere volts

d. ampere hours

Ans. b

44)	A fuse is normally a

a. power limiting device

b. voltage limiting device

c. current limiting device

d. power factor correcting device

Ans. c

45)	PVC cables are usually used for

a. internal wiring of buildings and workshops

b. 6.6 KV

c. 11 KV

d. 33 KV

Ans. a

46)

A fuse is

a. always connected in series with the circuit

b. always connected in parallel with the circuit

c. normally connected in series with the circuit

d. normally connected in parallel with the circuit

Ans. a

47)	Which support for overhead transmission line has the least life

a. wooden poles

b. fabricated steel structure

c. RCC poles

d. steel poles

Ans. a

48)	The insulating material most commonly used for power cables is

a. PVC

b. paper

c. rubber

d. all of the above

Ans. a

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Electrical house wiring MCQ:

Common house wiring question and answer following below

37) Galvanized steel wire is usually used as

a. stay wire

b. earth wire

c. structural component

d. all of the above

Ans. d

38)	HV transmission line uses

a.  pin type insulators

b. suspension insulators

c.  both a and b

d.  none of the above

Ans. c

39) Which of the following types of wiring is preferred for workshop lighting ?

a. casing capping wiring

b. batten wiring

c. concealed conduit wiring

d. surface conduit wiring

Ans. c

40) As per recommendation of ISI the maximum load that can be connected in one sub circuit is

a. 800 watts

b. 1000 watts

c. 1600 watts

d. 500 watts

Ans. a

41)	The cheapest system of internal wiring is ______ wiring

a. cleat

b. casing capping

c. CTS or TRS

d. conduit

Ans. a

42)

A fuse is

a. normally inserted in phase wire

b. normally inserted in neutral wire

c. never inserted in neutral wire

d. never inserted in phase wire

Ans. c

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Electrical house wiring MCQ:

31)  What is the factor of safety used for current ratings in a power installation?

a. 1

b. 5

c. 7

d. 2

Ans. d

32)  Which material is used for wiring continuous bus bar?

a. Aluminium

b. Copper

c. both a & b

d. none of these

Ans. a

33) Which set of rules are to be verified on the completion of wiring on any new installation?

a. Indian electricity rules,1950

b. Indian electricity rules, 1956

c. Indian electricity rules,1960

d. None of these

Ans. b

34)  Which statement is true, with respect to the motor installation?

a. Wood work is used for mounting switchgears

b. All equipment used in power wiring shall be of iron clad.

c. Looping of conductors is usually made.

d. The length of flexible conduit is more than 3 m

Ans. d

35)  In an electric line, a switch is connected to which of the following wire?

a. Earth

b. Phase

c. Neutral

d. Not connected

Ans. b

36) A lighting sub-circuit has 100 W lamps. If the rated current of the fused in this circuit is 5 A, the maximum number of light points on this circuit without violating regulations and safety should be

a. 8

b. 9

c. 14

d. 16

Ans. a

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