Q1:- what is the pressure of the brushes on communicator
1. (0. 9 kg /2.5 cm square )
2.(3600 kg / m square)
3.both
4.none of these
Q3:-In DC motor control methods for armature control which of the following is true
1.Below basic speed
2.Above Base speed
3.Above base torque
4. None of these
ANSWER:-1
ANSWER:-1
1. (0. 9 kg /2.5 cm square )
2.(3600 kg / m square)
3.both
4.none of these
ANSWER:-3
Q2:-In DC motor control methods for field control which of the following is true
1.Below basic speed
2. Above Base speed
3.Above base torque
4. Below based on
ANSWER:-2
Q3:-In DC motor control methods for armature control which of the following is true
1.Below basic speed
2.Above Base speed
3.Above base torque
4. None of these
ANSWER:-1
Q4:- in Hopkinson's method of testing DC machines the power taken from the mains has to supply
1. The losses in the motor only
2. The losses in both the Machines
3. The input to both the Machines
4. The input motor and not to the generator
1. The losses in the motor only
2. The losses in both the Machines
3. The input to both the Machines
4. The input motor and not to the generator
ANSWER:-2
Q5:- the function of a DC motor starter this to
1. Start the DC motor
2. Limit the starting current
3. Increase the starting torque
4. Avoid dips in the supply voltage
1. Start the DC motor
2. Limit the starting current
3. Increase the starting torque
4. Avoid dips in the supply voltage
ANSWER:-1
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