1. The function of circuit breaker is ?

to safe guard the circuit

to On and Off the circuit

to safe human life

None of these

Answer: to safe guard the circuit

Explanation:


2. Wiring clips are usually made of ?

copper

steel

Brass

aluminium

Answer: steel

Explanation:


3. The switch unit need not be on the what type of wire ?

Phase

Neutral

earth

any of the options

Answer: Neutral

Explanation:


4. One unit of electrical energy equals ?

1Kwh

1Wh

10 Wh

100 Wh

Answer: 1Kwh

Explanation:


5. Filaments of electric bulbs are usually made of ?

Nichrome

carbon

copper

tungsten

Answer: tungsten

Explanation:


6. Insulation resistance is expressed by ?

ohm

milli ohm

mega ohm

micro ohm

Answer: mega ohm

Explanation:


7. In which of the following equipments, current rating is not necessary ?

circuit breaker

relay

Isolator

load break switch

Answer: Isolator

Explanation:


8. Which type of fan used between dust collector and chimney in thermal power plant ?

Forced draft

Induced draft

Ceiling fan

Table fan

Answer: Induced draft

Explanation:


9. Who invented the electric bulb ?

Tesla

Marconi

Edison

Benjamin

Answer: Edison

Explanation:


10. Incandescent lamp is filled by ?

argon gas

oxygen gas

carbon di-oxide

Sulphur oxide

Answer: argon gas

Explanation: