The synchronous motor is not inherently self-starting because_______________?
A. The force required to accelerate the rotor to the synchronous speed in an instant is absent
B. The starting device to accelerate the rotor to near synchronous speed is absent
C. A rotating magnetic field does not have enough poles
D. The rotating magnetic field is produced by only 50 hz frequency currents
A three-phase synchronous motor will have_____________?
A. No slip-rings
B. One slip-ring
C. Two slip-rings
D. Three slip-rings
In case one phase of a three-phase synchronous motor is short-circuited the motor will____________?
A. Not start
B. Run at 2/3 of synchronous speed
C. Run with excessive vibrations
D. Take less than the rated load
Synchronous motors are generally not self-starting because:
A. The direction of rotation is not fixed
B. The direction of instantaneous torque reverses after half cycle
C. Startes cannot be used on these machines
D. Starting winding is not provided on the machines
“Al-Farooq” and “AL-Ghazali” are written by?
A. Hali
B. Shibli nomani
C. Deputy nazir ahmad
D. None of above
Which of the following is used in Pencils?
A. Graphite
B. Silicon
C. Charcoal
D. Phosphorous
Which Part of the Brain Regulates Body Temperature?
A. Cerebellum
B. Cerebrum
C. Hypothalamus
D. Medulla
How to Solve Analogies/Related Pair of Words Mcqs:
How to solve analogies: to answer analogy question, start making up a “test sentence” that expresses how the two words in the question are related. then try to insert the words from each choice in your test sentence to see which pair makes the most sense.
D. None of these