Top 250+ Solved Testing and Commissioning of Electrical Equipment’s MCQ Questions Answer
Q. 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
Q. Admittance relay is _______ relay.
a. impedance
b. directional
c. non-directional
d. none of the above
Q. 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
Q. If the fault occurs near the impedance relay, the VII ratio will be
a. constant for all distances
b. lower than that of if fault occurs away from the relay
c. higher than that of if fault occurs away from the relay
d. none of the above
Q. 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
Q. The steady state stability of the power system can be increased by
a. connecting lines in parallel
b. connecting lines in series
c. using machines of high impedance
d. reducing the excitation of machines
Q. The inductive interference between power and communication line can beminimized by
a. transposition of the power line
b. transposition of the communication line
c. both (A) and (B)
d. increasing the distance between the conductors
Q. The power loss is an important factor for the design of
a. transmission line
b. motor
c. generator
d. feeder
Q. 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
Q. H.R.C. fuse, as compared to a rewirable fuse, has
a. no ageing effect
b. high speed of operation
c. high rupturing capacity
d. all of the above
Q. On which of the following effects of electric current a fuse operates ?
a. Photoelectric effect
b. Electrostatic effect
c. Heating effect
d. Magnetic effect
Q. An isolator is installed
a. to operate the relay of circuit breaker
b. as a substitute for circuit breaker
c. always independent of the position of circuit breaker
d. generally on both sides of a circuit breaker
Q. 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