Electric Drives Questions and Answers
Q1.
Displacement is a _____ quantity.
Answer :
Vector
Q2.
The field control method is suitable for constant torque drives.
Answer :
False
Q3.
The power factor of a synchronous motor ______
Answer :
Improves with an increase in excitation and may even become leading at high excitations
Q4.
The unit of SCR is Ω.
Answer :
False
Q5.
SCR determines the stability of the synchronous machine.
Answer :
True
Q6.
In the rotor voltage injection method, when an external voltage source is in opposite phase with the main voltage then speed will _______
Answer :
Decrease
Q7.
In the chopper circuit, commutation times are _______
Answer :
Current commutation is less as compared to that of voltage commutation
Q8.
Armature reaction is magnetizing in nature due to a purely resistive load in the synchronous generator.
Answer :
False
Q9.
Full form of IFOC.
Answer :
Indirect field oriented control
Q10.
Calculate the quality factor for the resistor.
Answer :
0
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