Basic wiring practice-Electrical Engineering (MCQ) questions and answers

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.2.1
C. 1.4
D. 2.5

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

A. 1.4
B. 2.1
C.1.1
D. 2.5

4. What is the type of fuse?

A. Knife edge cartridge fuse
B. High rupturing capacity fuse
C.Ferrule contact cartridge fuse
D.Diazed screw type cartridge fus

5.What is the name of symbol used in wiring circuit?

A.Link
B. Fuse
C. Pull switch
D. Plug and socket

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

A.Air conditione
B.Motors
C. Hand tools
D. Geyser

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

A. Cable damage due to heat
B. Voltage drop increases
C.Load current increases
D. Voltage drop decreases

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

A. 4
B. 3
C. 1
D. 2

9. What is the advantage of concealed wiring?

A. Protection against moisture
B.Easy to maintain
C. Less voltage drop
D. High insulation resistance

10.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

11.What is the name of the accessory symbol?

A. Bell push switch
B.Two way switch
C. One way switch two poles
D. Multi position switch single pole

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

A.Concealed wiring
B. Permanent connection
C. Connection transportable appliances
D. Run cable through holes in ceiling

13. 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)

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

A. 2
B. 3
C. 4
D. 5

15.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

16. What is the name of the diagram?

A.Layout plan
B.Wiring diagram
C. Schematic diagram
D.Installation plan

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

A.Single phase domestic installations
B. Large industrial installations
C. Control main or branch circuits
D.Three phase power circuit installations

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

A. Time factor
B. Fusing factor
C. Fusing current
D.Cut-off factor

19. Which place the Tree system of wiring is most suitable?

A.Multi storied building
B. Godown wiring
C.Industrial wiring
D. Domestic wiring

20.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