WIRING PRACTICE

How the conduit pipes are specified? Length in meter Wall thickness in mm Inner diameter in mm Outer diameter in mm

What is the fusing factor for rewireable fuse? 1.1 1.4 2.1 2.5

What is the purpose of underwriter's knot for pendant holder connection? Avoid loose connections Increase mechanical strength Prevent excessive cap cover pressure Reduce the strain from the terminals of accessories

What is the type of fuse?

Knife edge cartridge fuse High rupturing capacity fuse Ferrule contact cartridge fuse Diazed screw type cartridge fuse

What is the name of electrical accessory?

Bracket holder Edison screw type holder Angle swivel lamp holder Goliath Edison screw lamp holder

Which type of load is protected by the L-series MCB? Motors Geyser Hand tools Air conditioner

Which type of switch is used in the circuit?

One way switch Two way switch Intermediate switch Multi position switch

What is the effect of low current rated cable used to connect higher current load? Voltage drop increases Load current increases Voltage drop decreases Cable damage due to heat

What is the name of the conduit accessory?

Solid bend Solid elbow Inspection bend Inspection elbow

How many two way switches with intermediate switch are used to control one lamp from three different places? 1 2 3 4

What is the advantage of concealed wiring? Easy to maintain Less voltage drop High insulation resistance Protection against moisture

What is the fusing factor for high rupturing capacity fuses (HRC)? 1.0 1.1 1.4 1.7

Which type of relay can be operated at both A.C and D.C? Ferred relay Thermal relay Impulse relay Dry reed relay

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

2 Pin plug Three pin plug Iron connector with direct entry Flat connector with side entry

What is the name of the accessory symbol?

Bell push switch Two way switch One way switch two poles Multi position switch single pole

What is the purpose of the flexible cords in domestic wiring? Concealed wiring Permanent connection Run cable through holes in ceiling Connection transportable appliances

Which type of circuit breaker is used above 100 A current rating? Miniature Circuit Breaker (MCB) Earth Leakage Circuit Breaker (ELCB) Moulded Case Circuit Breaker (MCCB) Residual Current Circuit Breaker (RCCB)

What is the purpose of tin coating on copper fuse wire? Withstand high temperature Increase the fusing factor Prevent oxidation of copper wire Increase the mechanical strength

What is the name of the four insulated conductors group? Pair Core Quad Layer

How many two way switches are required in godown wiring circuit to control four lamps 2 3 4 5

Why tree system of wiring most suitable for multistoryed building? Easy load balancing Constant voltage distribution Offers minimum voltage drop Easy in fault finding with many fuses

Which is used as a filler material for fixing screw hole on ceiling? Paper Nylon Cement Poly vinyl chloride

What is the symbol indicates?

Table fan Ceiling fan Bracket fan Exhaust fan

What is the name of the relay?

Impulse relay Dry reed relay Electromagnetic relay Mercury wetted contact relay

Where the Iron Clad Double Pole (ICDP) main switch is used? Large industrial installations Control main or branch circuits Single phase domestic installations Three phase power circuit installations

Which electrical accessory belongs to general classification of accessories? Fuse Ceiling roses Intermediate switch Pendent lamp holder

Which is the application of DC series MCB? AC motor DC motor Locomotives Air conditioners

What is the term for the time taken by a fuse to interrupt the circuit in fault? Time factor Fusing factor Cut-off factor Fusing current

Which place the Tree system of wiring is most suitable? Godown wiring Industrial wiring Domestic wiring Multi storied building

What is the maximum PVC conduit size to make safe cold bending? 12 mm 19 mm 25 mm 50 mm

Why separate wiring is recommended for home theater wiring and power wiring? Avoid electrical fire Reduce power loss Avoid electrical interference Maintain voltage level constant

What is the name of the lighting circuit?

Tunnel lighting wiring Corridor lighting wiring Godown lighting wiring Staircase lighting wiring

What is the tool used to bend conduits? Hickey Coupler Pipe vice Bench vice

What is the expansion of MCB? Minute Control Breaker Miniature Circuit Breaker Minimum Current Breaker Maximum Current Breaker

What is the purpose of ELCB? Detects the fault in circuit Monitors the residual current Protects the equipment from over load Protects from short circuit fault

What is the purpose of the fuse cut out provided at the incoming power supply? To ensure the line is not over loaded To maintain the stabilised supply voltage To protect the circuit from the leakage current To protect the human beings from electric shock

What is the use of die stock set? Cut external threads on square pipe Cut internal threads on cylindrical pipe Cut external threads on cylindrical pipe Cut internal threads on rectangular pipe

What is the purpose of the circuit diagram in wiring installation? To show the physical position of accessories To estimate the various accessories in the circuit To inform the reader quickly what for the circuit is designed To show the schematic connection of the circuit for a specific task

Which electrical equipment is provided with L series MCB? General lighting Motors Air conditioner Halogen lamp

Why the looping-back (loop in) method is preferred in domestic wiring installation? Easy to identify the faults No separate joints are used More number of tappings can be taken More number of sub-circuits can be made

What is length of thread on rigid conduits as per BIS? 9mm - 20mm 11mm - 27mm 13mm - 25mm 15mm - 30mm

Which type of conduit used for gas tight explosive installation? Flexible conduits Rigid steel conduits Rigid non-metallic conduits Flexible non-metallic conduits

What is the function of circuit breaker? Making contact at normal condition Making contact at abnormal condition Breaking automatically at abnormal condition Physical breaking contact at abnormal condition

What is the function of bimetallic strip in MCB? Overload protection Short circuit protection Over voltage protection Earth leakage protection

What protection offered by residual current circuit breaker? Protection from shock Protection from over load Protection from short circuit Protection from leakage current

Which wiring is suitable for temporary installations? Cleat wiring Concealed wiring PVC conduit wiring Metal conduit wiring

Where the phase conductor is looped in looping system of wiring? Switch box Junction box Distribution box Socket connection