Electric Drives Questions and Answers
Q1.
For a given torque, increasing diverter resistance of a DC series motor causes the _____
Answer :
decrease in speed and less armature current
Q2.
The length of phasor is ______
Answer :
R.M.S
Q3.
The characteristics shown by an element in the I-V curve is V=I2. The nature of the element is _
Answer :
Non-linear, Unilateral, Active
Q4.
What is the effect of impurities on elasticity?
Answer :
It will slightly increase
Q5.
Which one of the following motor is a 1-Φ AC motor?
Answer :
Capacitor run
Q6.
Full form of PWM.
Answer :
Pulse width modulation
Q7.
Induction motor is also known as ______
Answer :
Frequency changer
Q8.
Iron losses occur in the machine are variable losses.
Answer :
False
Q9.
Which test is used to determine the conditions where electric motors are being used?
Answer :
Thermography
Q10.
Full form of VRF.
Answer :
Voltage ripple factor
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