Basic wiring practice MCQ Question and Answer | ITI ELECTRICIAN

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ITI ELECTRICIAN | Basic wiring practice MCQ

1.

How the conduit pipes are specified?

1. Length in metre
2. Wall thickness in mm
3. Inner diameter in mm
4. Outer diameter in mm ,

2.

What is the fusing factor for rewireable fuse?

1. 1.1
2. 1.4
3. 2.1
4. 2.5

3.

What is the purpose of underwriter’s knot for pendent holder connection?

1. Avoid loose connections
2. Increase mechanical strength
3. Prevent excessive cap cover pressure
4. Reduce the strain from the terminals of accessories

4.

What is the type of fuse?

1. Knife edge cartridge fuse
2. High rupturing capacity fuse
3. Ferrule contact cartridge fuse
4. Diazed screw type cartridge fuse

5.

What is the name of electrical accessory?

1. Bracket holder
2. Edison screw type holder
3. Angle swivel lamp holder
4. Goliath Edison screw lamp holder

6.

What is the name of symbol used in wiring circuit?

1. Link
2. Fuse
3. Pull switch
4. Plug and socket

7.

Which type of load is protected by the L-series MCB?

1. Motors
2. Geyser
3. Hand tools
4. Air conditioner

8.

Which type of switch is used in the circuit?

1. One-way switch
2. Two-way switch
3. Intermediate switch
4. Multiposition switch

9.

What is the effect of low current rated cable used to connect higher current load?

1. Voltage drop increases
2. Load current increases
3. Voltage drop decreases
4. Cable damage due to heat

10.

What is the name of the conduit accessory?

1. Solid bend
2. Solid elbow
3. Inspection Bend
4. Inspection elbow

11.

How many two way switches with intermediate switch are used to control one lamp from three different places?

1. 1
2. 2
3. 3
4. 4

12.

What is the advantage of concealed wiring?

1. Easy to maintain
2. Less voltage drop
3. High insulation resistance
4. Protection against moisture

13.

What is the name of the diagram?

1. Installation plan
2. Layout diagram
3. Wiring diagram
4. Circuit diagram

14.

What is the fusing factor for high repturing capacity fuses (HRC)?

1. 1.0
2. 1.1
3. 1.4
4. 1.7

15.

Which type of relay can be operated at both A.C and D.C?

1. Ferred relay
2. Thermal relay
3. Impulse relay
4. Dry reed relay

16.

What is the name of the accessory used in electrical appliances?

1. 2 Pin plug
2. Three pin plug
3. Iron connector with direct entry
4. Flat connector with side entry

17.

What is the name of the accessory symbol?

1. Bell push switch
2. Two way switch
3. One way switch two poles
4. Multi position switch single pole

18.

What is the purpose of the flexible cords in domestic wiring?

1. Concealed wiring
2. Permanent connection
3. Run cable through holes in ceiling
4. Connection transportable appliances

19.

Which type of circuit breaker is used above 100 A current rating?

1. Miniature Circuit Breaker (MCB )
2. Earth Leakage Circuit Breaker (ELCB)
3. Moulded Case Circuit Breaker (MCCB)
4. Residual Current Circuit Breaker (RCCB)

20.

What is the purpose of tin coating on copper fuse wire?

1. Withstand high temperature
2. Increase the fusing factor
3. Prevent oxidation of copper wire
4. Increase the mechanical strength

21.

What is the name of the four insulated conductors group?

1. Pair
2. Core
3. Quad
4. Layer

22.

How many two way switches are required in godown wiring circuit to control four lamps

1. 2
2. 3
3. 4
4. 5

23.

Why tree system of wiring most suitable for multistoryed building?

1. Easy load balancing
2. Constant voltage distribution
3. Offers minimum voltage drop
4. Easy in fault finding with many fuses

24.

Which is used as a filler material for fixing screw hole on ceiling?

1. Paper
2. Nylon
3. Cement
4. Poly vinyl chloride

25.

What is the symbol indicates?

1. Table fan
2. Ceiling fan
3. Bracket fan
4. Exhaust fan

26.

What is the name of the relay?

1. Impulse relay
2. Dry reed relay
3. Electromagnetic relay
4. Mercury wetted contact relay

27.

What is the name of the diagram?

1. Layout plan
2. Wiring diagram
3. Installation plan
4. Schematic diagram

28.

Where the Iron Clad Double Pole (ICDP) main switch is used?

1. Large industrial installations
2. Control main or branch circuits
3. Single phase domestic installations
4. Three phase power circuit installations

29.

Which electrical accessory belongs to general classification of accessories?

1. Fuse
2. Ceiling roses
3. Intermediate switch
4. Pendent lamp holder

30.

Which is the application of DC series MCB?

1. AC motor
2. DC motor
3. Locomotives
4. Air conditioners

31.

What is the term for the time taken by a fuse to interrupt the circuit in fault?

1. Time factor
2. Fusing factor
3. Cut-off factor
4. Fusing current

32.

Which place the Tree system of wiring is most suitable?

1. Godown wiring
2. Industrial wiring
3. Domestic wiring
4. Multi storied building

33.

What is the maximum PVC conduit size to make safe cold bending?

1. 12 mm
2. 19 mm
3. 25 mm
4. 50 mm

34.

Why separate wiring is recommended for home theatre wiring and power wiring?

1. Avoid electrical fire
2. Reduce power loss
3. Avoid electrical interference
4. Maintain voltage level constant

35.

What is the name of the lighting circuit?

1. Tunnel lighting wiring
2. Corridor lighting wiring
3. Godown lighting wiring
4. Staircase lighting wiring

36.

What is the tool used to bend conduits?

1. Hickey
2. Coupler
3. Pipe vice
4. Bench vice

37.

What is the expansion of MCB?

1. Minute Control Breaker
2. Miniature Circuit Breaker
3. Minimum Current Breaker
4. Maximum Current Breaker

38.

What is the purpose of ELCB? ELCB

1. Detects the fault in circuit
2. Monitors the residual current
3. Protects the equipment from over load
4. Protects from short circuit fault

39.

What is the purpose of the fuse cut out provided at the incoming power supply?

1. To ensure the line is not over loaded
2. To maintain the stabilised supply voltage
3. To protect the circuit from the leakage current
4. To protect the human beings from electric shock

40.

What is the use of die stock set?

1. Cut external threads on square pipe
2. Cut internal threads on cylindrical pipe
3. Cut external threads on cylindrical pipe
4. Cut internal threads on rectangular pipe

41.

Which classification of accessory the ceiling rose is classified?

1. Outlet accessories
2. Safety accessories
3. Holding accessories
4. General accessories

42.

What is the purpose of the circuit diagram in wiring installation?

1. To show the physical position of accessories
2. To estimate the various accessories in the circuit
3. To inform the reader quickly what for the circuit is designed
4. To show the schematic connection of the circuit for a specific task

43.

Which electrical equipment is provided with L series MCB?

1. General lighting
2. Motors
3. Air conditioner
4. Halogen lamp

44.

Why the looping-back (loop in) method is preferred in domestic wiring installation?

1. Easy to identify the faults
2. No separate joints are used
3. More number of tappings can be taken
4. More number of sub-circuits can be made

45.

What does the symbol marked X indicate?

1. Number of wires run on the limb
2. Number of switches to be connected
3. Number of battern (or) pipe to be fixed
4. Number of clamps (or) clips to be fixed

46.

What is the name of wiring method?

1. Joint box method
2. Looping back method
3. Loop in method using 3 plate ceiling rose 3
4. Loop in method using 2 plate ceiling rose 2

47.

What is the name of the diagram?

1. Staircase wiring
2. Godown wiring
3. Hostel wiring
4. Tunnel wiring

48.

What is the type of relay?

1. Impulse relay
2. Dry reed relay
3. Latching relay
4. Electromagnetic relay

49.

Calculate the earth fault loop impedance, if the ELCB tripping current is 30 mA?

1. 166 
2. 1666 
3. 16.66 
4. 16666 

50.

What is the type of wiring?

1. CTS wiring
2. Cleat wiring
3. PVC conduit wiring
4. PVC casing and capping wiring

51.

What is length of thread on rigid conduits as per BIS?

1. 9mm - 20mm
2. 11mm - 27mm
3. 13mm - 25mm
4. 15mm - 30mm

52.

Which type of conduit used for gas tight explosive installation?

1. Flexible conduits
2. Rigid steel conduits
3. Rigid non-metallic conduits
4. Flexible non-metallic conduits

53.

What is the function of circuit breaker?

1. Making contact at normal condition
2. Making contact at abnormal condition
3. Breaking automatically at abnormal condition
4. Physical breaking contact at abnormal condition

54.

What is the function of bimetallic strip in MCB ?

1. Over load protection
2. Short circuit protection
3. Over voltage protection
4. Earth leakage protection

55.

What protection offered by residual current circuit breaker?

1. Protection from shock
2. Protection from over load
3. Protection from short circuit
4. Protection from leakage current

56.

Which wiring is suitable for temporary installations?

1. Cleat wiring
2. Concealed wiring
3. PVC conduit wiring
4. Metal conduit wiring

57.

Where the phase conductor is looped in looping system of wiring?

1. Switch box
2. Junction box
3. Distribution box
4. Socket connection

58.

How many link clips are packed in cardboard boxes as per BIS rules?

1. 50 clips 50
2. 75 clips 75
3. 100 clips 100
4. 150 clips 150

59.

What is the application of the wiring circuit?

1. Two lamps dim operation only
2. Two lamps controlled by one switch
3. Two lamps controlled by two switches
4. One lamp bright and two lamp dim operation

60.

What is the reason for home theatre wiring not to run along with power wiring?

1. Avoid leakage current in home theatre wiring
2. Control temperature in home theatre wiring
3. Avoid electrical interference in audio, video system
4. Reduce the power consumption in power supplies

61.

What will happen to the value of earth resistance if length of the earth pipe is increased?

1. Remain same
2. Increases
3. Decreases
4. Infinity

62.

Which types of accessories are used to operate a portable appliance?

1. Safety accessories
2. Holding accessories
3. Outlet accessories
4. Controlling accessories

63.

Which insulation is necessary for proper function and basic protection?

1. Double insulation
2. Functional insulation
3. Reinforced insulation
4. Supplementary insulation

64.

Which type of accessories of fuse is comes under?

1. Controlling accessories
2. Holding accessories
3. Safety accessories
4. Outlet accessories

65.

What is the expansion of ECC?

1. Earth Conductor Continuity
2. Earth Continuity Conductor
3. Earth Carrying Conductor
4. Earth Continuity Cable

66.

Which type MCBs suitable for halogen lamps?

1. L series MCBs
2. G series MCBs
3. DC series MCBs
4. L and G series MCBs

67.

Which type of lamp holder is used for the lamps above 300 watts?

1. Edison screw holder
2. Goliath screw holder
3. Angle holder
4. Brachet holder

68.

What is the expansion of AWG?

1. American Wire Gauge
2. American Wire Grade
3. American Wire Group
4. American Wire Guard

69.

What is the name of BIS symbol? BIS

1. Lamp
2. Two way switch
3. Intermediate switch
4. Multi - position switch

70.

What is the type of diagram?

1. Wiring diagram
2. Circuit diagram
3. Installation plan
4. Layout diagram