Oil switches are employed for_____________?

A. low currents circuits
B. low voltages circuits
C. high voltages and large currents circuits
D. all circuits

A fuse in a motor circuit provides protection against__________?

A. overload
B. short-circuit and overload
C. open circuit, short-circuit and overload
D. none of the above

On which of the following effects of electric current a fuse operates ?

A. photoelectric effect
B. electrostatic effect
C. heating effect
D. magnetic effect

The fuse rating is expressed in terms of_____________?

A. current
B. voltage
C. var
D. kva

The power loss is an important factor for the design of_______________?

A. transmission line
B. motor
C. generator
D. feeder

The material used for fuse must have_____________?

A. low melting point and high specific resistance
B. low melting point and -low specific resistance
C. high melting point and low specific resistance
D. low melting point and any specific resistance

A fuse is connected_______________?

A. in series with circuit
B. in parallel with circuit
C. either in series or in parallel with circuit
D. none of the above

The steady state stability of the power system can be increased by_____________?

A. connecting lines in parallel
B. connecting lines in series
E. using machines of high impedance
D. reducing the excitation of machines

Series capacitors are used to_________________?

A. compensate for line inductive reactance
B. compensate for line capacitive reactance
C. improve line voltage
D. none of the above

The torque produced in induction type relay (shaded pole structure) is_____________?

A. inversely proportional to the current
B. inversely proportional to the square of the current
C. proportional to the current
D. proportional to square of the current