D.c. Motors questions with answers
101 multiple-choice questions. Open any question for its answer and explanation.
- D.C. shunt motors are used for driving
- Which of the following method of speed control of D.C. machine will offer minimum efficiency?
- Which of the following motors one will choose to drive the rotary compressor?
- The power mentioned on the name plate of an electric motor indicates
- If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking
- The current drawn by the armature of D.C. motor is directly proportional to
- When two D.C. series motors are connected in parallel, the resultant speed is
- In D.C. motor which of the following can sustain the maximum temperature rise?
- In a D.C. generator all of the following could be the effects of iron losses except
- Which of the following loss in a D.C. generator is dissipated in the form of heat?
- During rheostatic braking of D.C. series motors
- A D.C. series motor is that which
- The armature torque of the D.C. shunt motor is proportional to
- By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?
- Which D.C. motor will be suitable along with flywheel for intermittent light and heavy loads?
- In a D.C. generator, the iron losses mainly take place in
- At the instant of starting when a D.C. motor is put on supply, it behaves like
- Which of the following motor is preferred for operation in highly explosive atmosphere?
- In the D.C. motor the iron losses occur in
- If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens
- If the supply voltage for a D.C. motor is increased, which of the following will decrease?
- In case of conductively compensated D.C. series motors, the compensating winding is provided
- Which of the following losses are significantly reduced by laminating the core of a D.C. generator?
- Which one of the following is not necessarily the advantage of D.C. motors over
- The total losses in a well designed D.C. generator of 10 kW will be nearly