Electric Drives Questions and Answers
Q1.
When a UJT is used for triggering an SCR, then the wave shape of voltage obtained from the UJT circuit will be ______
Answer :
Pulse
Q2.
For large DC machines, the yoke is usually made of which material?
Answer :
Cast steel
Q3.
The frame of a synchronous motor is made of _____
Answer :
Cast iron
Q4.
Cylindrical pole machines are less stable than salient rotor machines.
Answer :
True
Q5.
The stator voltage control method is a part of the slip changing technique.
Answer :
True
Q6.
The rotor injection method is a part of the slip changing technique.
Answer :
True
Q7.
The unit of voltage is Pascal.
Answer :
False
Q8.
The advantage of the double squirrel cage induction motor over a single cage rotor is that its ___
Answer :
Starting current is lower
Q9.
The characteristics shown by an element in the I-V curve is a straight line passing through the origin with a positive slope. The nature of the element is _____
Answer :
Linear, Bilateral
Q10.
Selectivity value increases for lower values of bandwidths.
Answer :
True
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