Higher Study | Utilization of Electrical Energy

Practice Higher Study | Utilization of Electrical Energy on Bissoy — browse topics below and open any question.

Questions

Which of the following relations is correct?

ক

NI = Sφ

খ

NS = Iφ

গ

Nφ = SI

ঘ

NI = S/φ

Which of the following is not a type of resistance welding?

ক

Seam

খ

Projection

গ

Electro-slag

ঘ

Spot

Which of the following braking systems on the locomotives is costly?

ক

Regenerative braking on electric locomotives

খ

Vacuum braking on diesel locomotives

গ

Vacuum braking on steam locomotives

ঘ

All braking systems are equally costly

Which of the following should be used for extinguishing electrical fires?

ক

Water

খ

Carbon tetrachloride fire extinguisher

গ

Foam type fire extinguisher

ঘ

CO<sub>2</sub> fire extinguisher

Which of the following methods of heating is not dependent on the frequency of supply?

ক

Induction heating

খ

Dielectric heating

গ

Electric resistance heating

ঘ

All of the above

Induction heating process is based on which of the following principles?

ক

Thermal ion release principle

খ

Nucleate heating principle

গ

Resistance heating principle

ঘ

Electromagnetic induction principle

Which of the following will happen if the thickness of refractory wall of furnace is increased?

ক

Heat loss through furnace wall will increase

খ

Temperature inside the furnace will fall

গ

Temperature on the outer surface of furnace walls will drop

ঘ

Energy consumption will increase