Q1:- The function of a centrifugal pump in 1- phase
induction motors is to
1.
cut off starting winding at appropriate time
2.
cut the capacitor during running condition
3.
protect the motor from overloading
4.
improve the starting performance of the motor
ANSWER:-1
Q2:- In a super heater in a steam plant the
1.
pressure rises and temp remains unchanged
2.
pressure rise and temp drops
3.
temp rises and pressure drops
4.
temp rises and pressure remains unchanged
ANSWER:-4
Q3:- For dc shunt motor control by armature resistance
variations is best suited for
1.
constant torque drive
2.
variable torque drive
3.
variable power drive
4.
constant power drive
ANSWER:-1
Q4:- In a RLC series circuit at resonance
1.
current is minimum , power factor is zero
2.
current is maximum , p.f. is zero
3.
current is maximum , p.f. is unity
4.
current is minimum , p.f. is unity
ANSWER:-3
Q5:- The V- curve of a synchronous motor the relationship b/w
1.
armature current and supply voltage
2.
field current and armature current
3.
excitation current and back emf
4.
field current and p.f.
ANSWER:-2
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