Electric Drives Questions and Answers
Q1.
What is a mark to space ratio?
Answer :
Ton÷Toff
Q2.
Duty cycle (D) is _____
Answer :
Ton÷(Ton+ Toff)
Q3.
The unit of the torque is _____
Answer :
N-m
Q4.
Fan type of loads exhibits which type of load torque characteristics?
Answer :
Non-Linearly rising torque characteristics
Q5.
Load torques can be classified into how many types?
Answer :
Two
Q6.
Passive torques always oppose the motion of the driven machine.
Answer :
True
Q7.
The hunting phenomenon in a synchronous motor is also referred to as ______
Answer :
Surging and phase swinging
Q8.
The frame of an induction motor is made of _______
Answer :
Cast iron
Q9.
A chopper behaves as a ______
Answer :
DC equivalent of AC transformer
Q10.
Armature reaction is demagnetizing in nature due to purely lagging load.
Answer :
True
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