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.Management Sciences
Category: Electrical Engineering Mcqs
To limit the operating temperature an electrical machine should have proper____________?
A. voltage rating
B. current rating
C. power factor
D. speed
If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling?
A. Loose
B. Tight
C. Critical
D. None of the above
After proper turn on of thyristor____________?
A. gate signal is always present
B. gate signal must be removed
C. gate signal should present but can be removed
D. none of the above.
An alternator coupled to a __________ runs at slow speed, as compared to as compared to others.
A. diesel engine
B. hydraulic turbine
C. steam turbine
D. gas turbine
In a phase shift oscillator, the frequency determining elements are _______________?
A. L and C
B. R, L and C
C. R and C
D. None of the above
In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will_____________?
A. become unstable
B. draw excessive armature current and may burn out
C. fall out of synchronism and come to stand still
D. run as induction motor
For driving high inertia loads best type of induction motor suggested is_____________?
A. slip ring type
B. squirrel cage type
C. any of the above
D. none of the above
D.C. generators are connected to the busbars or disconnected from them only under the floating condition________________?
A. to avoid sudden loading of the primemover
B. to avoid mechanicaljerk to the shaft
C. to avoid burning of switch contacts
D. all above
In the circle diagram for induction motor, the diameter of the circle represents____________?
A. slip
B. rotor current
C. running torque
D. line voltage
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