Higher Study | Electrician and Wireman

Practice Higher Study | Electrician and Wireman on Bissoy — browse topics below and open any question.

Electrical Machines Power Systems Electrical Networks Light and Illumination Electrical Wiring

Questions

What is the full form of MCB?

ক

Miniature contact breaker

খ

Mini circuit breaker

গ

Miniature circuit breaker

ঘ

Mini contact breaker

What is the function of breather in a transformer?

ক

To provide oxygen inside the tank

খ

To cool the coils during reduced load

গ

To cool the transformer oil

ঘ

To arrest flow of moisture when outside air enters the transformer

Which of the following acts as a protection against high voltage surges due to lightning and switching?

ক

Horn gaps

খ

Thermal overload relays

গ

Breather

ঘ

Conservator

A wrist grounding strap contains which of the following:

ক

Surge protector

খ

Capacitor

গ

Voltmeter

ঘ

Resistor

ঙ

None of the above

By which of the following a bus-bar is rated?

ক

Current only

খ

Current and voltage

গ

Current, voltage and frequency

ঘ

Current, voltage, frequency and short time current

Which of the following materials is not used for transmission and distribution of electrical power?

ক

Copper

খ

Aluminium

গ

Steel

ঘ

Tungsten

Temperature coefficient of resistance is expressed in terms of

ক

ohms/°C

খ

mhos/ohm°C

গ

ohms/ohm°C

ঘ

mhos/°C

Which of the following materials has the highest electrical conductivity?

ক

Diamond

খ

Silver

গ

Graphite

ঘ

Wood