1. How the conduit pipes are specified?
A Length in metre
B Wall thickness in mm
C Inner diameter in mm
D Outer diameter in mm
2. What is the fusing factor for rewireable fuse?
A 1.1
B 1.4
C 2.1
D 2.5
3. What is the purpose of underwriter’s knot for pendent holder connection?
A Avoid loose connections
B Increase mechanical strength
C Prevent excessive cap cover pressure
D Reduce the strain from the terminals of accessories
4. What is the type of fuse?
B High rupturing capacity fuse
C Ferrule contact cartridge fuse
D Diazed screw type cartridge fuse
5. What is the name of electrical accessory?
B Edison screw type holder
C Angle swivel lamp holder
D Goliath Edison screw lamp holder
6. What is the name of symbol used in wiring circuit?
B Fuse
C Pull switch
D Plug and socket
7. Which type of load is protected by the L-series MCB?
A Motors
B Geyser
C Hand tools
D Air conditioner
8. Which type of switch is used in the circuit?
B Two-way switch
C Intermediate switch
D Multiposition switch
9. What is the effect of low current rated cable used to connect higher current load?
A Voltage drop increases
B Load current increases
C Voltage drop decreases
D Cable damage due to heat
10. What is the name of the conduit accessory?
B Solid elbow
C Inspection Bend
D Inspection elbow
11. How many two way switches with intermediate switch are used to control one lamp from three different places?
A 1
B 2
C 3
D 4
12. What is the advantage of concealed wiring?
A Easy to maintain
B Less voltage drop
C High insulation resistance
D Protection against moisture
13. What is the name of the diagram?
B Layout diagram
C Wiring diagram
D Circuit diagram
14. What is the fusing factor for high repturing capacity fuses (HRC)?
A 1.0
B 1.1
C 1.4
D 1.7
15. Which type of relay can be operated at both A.C and D.C?
A Ferred relay
B Thermal relay
C Impulse relay
D Dry reed relay
16. What is the name of the accessory used in electrical appliances?
B Three pin plug
C Iron connector with direct entry
D Flat connector with side entry
17. What is the name of the accessory symbol?
B Two way switch
C One way switch two poles
D Multi position switch single pole
18. What is the purpose of the flexible cords in domestic wiring?
A Concealed wiring
B Permanent connection
C Run cable through holes in ceiling
D Connection transportable appliances
19. Which type of circuit breaker is used above 100 A current rating?
A Miniature Circuit Breaker (MCB)
B Earth Leakage Circuit Breaker (ELCB)
C Moulded Case Circuit Breaker (MCCB)
D Residual Current Circuit Breaker (RCCB)
20. What is the purpose of tin coating on copper fuse wire?
A Withstand high temperature
B Increase the fusing factor
C Prevent oxidation of copper wire
D Increase the mechanical strength
21. What is the name of the four insulated conductors group?
A Pair
B Core
C Quad
D Layer
22. How many two way switches are required in godown wiring circuit to control four lamps?
A 2
B 3
C 4
D 5
23. Why tree system of wiring most suitable for multistoryed building?
A Easy load balancing
B Constant voltage distribution
C Offers minimum voltage drop
D Easy in fault finding with many fuses
24. Which is used as a filler material for fixing screw hole on ceiling?
A Paper
B Nylon
C Cement
D Poly vinyl chloride
25. What is the symbol indicates?
B Ceiling fan
C Bracket fan
D Exhaust fan
26. What is the name of the relay?
B Dry reed relay
C Electromagnetic relay
D Mercury wetted contact relay
27. What is the name of the diagram?
B Wiring diagram
C Installation plan
D Schematic diagram
28. Where the Iron Clad Double Pole (ICDP) main switch is used?
A Large industrial installations
B Control main or branch circuits
C Single phase domestic installations
D Three phase power circuit installations
29. Which electrical accessory belongs to general classification of accessories?
A Fuse
B Ceiling roses
C Intermediate switch
D Pendent lamp holder
30. Which is the application of DC series MCB?
A AC motor
B DC motor
C Locomotives
D Air conditioners
31. What is the term for the time taken by a fuse to interrupt the circuit in fault?
A Time factor
B Fusing factor
C Cut-off factor
D Fusing current
32. Which place the Tree system of wiring is most suitable?
A Godown wiring
B Industrial wiring
C Domestic wiring
D Multi storied building
33. What is the maximum PVC conduit size to make safe cold bending?
A 12 mm
B 19 mm
C 25 mm
D 50 mm
34. Why separate wiring is recommended for home theatre wiring and power wiring?
A Avoid electrical fire
B Reduce power loss
C Avoid electrical interference
D Maintain voltage level constant
35. What is the name of the lighting circuit?
B Corridor lighting wiring
C Godown lighting wiring
D Staircase lighting wiring
36. What is the tool used to bend conduits?
A Hickey
B Coupler
C Pipe vice
D Bench vice
37. What is the expansion of MCB?
A Minute Control Breaker
B Miniature Circuit Breaker
C Minimum Current Breaker
D Maximum Current Breaker
38. What is the purpose of ELCB?
A Detects the fault in circuit
B Monitors the residual current
C Protects the equipment from over load
D Protects from short circuit fault
39. What is the purpose of the fuse cut out provided at the incoming power supply?
A To ensure the line is not over loaded
B To maintain the stabilised supply voltage
C To protect the circuit from the leakage current
D To protect the human beings from electric shock
40. What is the use of die stock set?
A Cut external threads on square pipe
B Cut internal threads on cylindrical pipe
C Cut external threads on cylindrical pipe
D Cut internal threads on rectangular pipe
41. Which classification of accessory the ceiling rose is classified?
A Outlet accessories
B Safety accessories
C Holding accessories
D General accessories
42. What is the purpose of the circuit diagram in wiring installation?
A To show the physical position of accessories
B To estimate the various accessories in the circuit
C To inform the reader quickly what for the circuit is designed
D To show the schematic connection of the circuit for a specific task
43. Which electrical equipment is provided with L series MCB?
A General lighting
B Motors
C Air conditioner
D Halogen lamp
44. Why the looping-back (loop in) method is preferred in domestic wiring installation?
A Easy to identify the faults
B No separate joints are used
C More number of tappings can be taken
D More number of sub-circuits can be made
45. What does the symbol marked X indicate?
B Number of switches to be connected
C Number of battern (or) pipe to be fixed
D Number of clamps (or) clips to be fixed
46. What is the name of wiring method?
B Looping back method
C Loop in method using 3 plate ceiling rose
D Loop in method using 2 plate ceiling rose
47. What is the name of the diagram?
B Godown wiring
C Hostel wiring
D Tunnel wiring
48. What is the type of relay?
B Dry reed relay
C Latching relay
D Electromagnetic relay
49. Calculate the earth fault loop impedance, if the ELCB tripping current is 30 mA?
A 166 ohm
B 1666
C 16.66
D 16666
50. What is the type of wiring?
B Cleat wiring
C PVC conduit wiring
D PVC casing and capping wiring
51. What is length of thread on rigid conduits as per BIS?
A 9mm - 20mm
B 11mm - 27mm
C 13mm - 25mm
D 15mm - 30mm
52. Which type of conduit used for gas tight explosive installation?
A Flexible conduits
B Rigid steel conduits
C Rigid non-metallic conduits
D Flexible non-metallic conduits
53. What is the function of circuit breaker?
A Making contact at normal condition
B Making contact at abnormal condition
C Breaking automatically at abnormal condition
D Physical breaking contact at abnormal condition
54. What is the function of bimetallic strip in MCB?
A Over load protection
B Short circuit protection
C Over voltage protection
D Earth leakage protection
55. What protection offered by residual current circuit breaker?
A Protection from shock
B Protection from over load
C Protection from short circuit
D Protection from leakage current
56. Which wiring is suitable for temporary installations?
A Cleat wiring
B Concealed wiring
C PVC conduit wiring
D Metal conduit wiring
57. Where the phase conductor is looped in looping system of wiring?
A Switch box
B Junction box
C Distribution box
D Socket connection
58. How many link clips are packed in cardboard boxes as per BIS rules?
A 50 clips
B 75 clips
C 100 clips
D 150 clips
59. What is the application of the wiring circuit?
B Two lamps controlled by one switch
C Two lamps controlled by two switches
D One lamp bright and two lamp dim operation
60. What is the reason for home theatre wiring not to run along with power wiring?
A Avoid leakage current in home theatre wiring
B Control temperature in home theatre wiring
C Avoid electrical interference in audio, video system
D 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?
A Remain same
B Increases
C Decreases
D Infinity
62. Which types of accessories are used to operate a portable appliance?
A Safety accessories
B Holding accessories
C Outlet accessories
D Controlling accessories
63. Which insulation is necessary for proper function and basic protection?
A Double insulation
B Functional insulation
C Reinforced insulation
D Supplementary insulation
64. Which type of accessories of fuse is comes under?
A Controlling accessories
B Holding accessories
C Safety accessories
D Outlet accessories
65. What is the expansion of ECC?
A Earth Conductor Continuity
B Earth Continuity Conductor
C Earth Carrying Conductor
D Earth Continuity Cable
66. Which type MCBs suitable for halogen lamps?
A L series MCBs
B G series MCBs
C DC series MCBs
D L and G series MCBs
67. Which type of lamp holder is used for the lamps above 300 watts?
A Edison screw holder
B Goliath screw holder
C Angle holder
D Brachet holder
68. What is the expansion of AWG?
A American Wire Gauge
B American Wire Grade
C American Wire Group
D American Wire Guard
69. What is the name of BIS symbol?
B Two way switch
C Intermediate switch
D Multi - position switch
70. What is the type of diagram?
B Circuit diagram
C Installation plan
D Layout diagram
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