A. transformers
B. cooling ranges
C. three phase induction motors
D. single phase
Related Mcqs:
- The selection of an electric motor for any application depends on which of the following factors ?
A. Electrical characteristics
B. Mechanical characteristics
C. Size and rating of motors
D. Cost
E. All of the above - Which part of a motor needs maximum attention for maintenance ?
A. Frame
B. Rearing
C. Stator winding
D. Rotor winding - Ward-Leonard controlled D.C. drives are generally used for _____________________ excavators?
A. Light duty
B. Medium duty
C. Heavy duty
D. All of the above - Reluctance motor is a________________?
A. variable torque motor
B. low torque variable speed motor
C. self starting type synchronous motor
D. low noise, slow speed motor - Rotor of a motor is usually supported on ___________________ bearings?
A. ball or roller
B. needle
C. bush
D. thrust - ___________________has least range of speed control?
A. Slip ring induction motor
B. Synchronous motor
C. D.C. shunt motor
D. Schrage motor - _______________has the least value of starting torque to full load torque ratio?
A. D.C. shunt motor
B. D.C. series motor
C. Squirrel cage induction motor
D. Slip ring induction motor - The capacity of a crane is expressed in terms of_______________?
A. type of drive
B. span
C. tonnes
D. any of the above - For which of the following applications motor has to start with high acceleration ?
A. Oil expeller
B. Floor mill
C. Lifts and hoists
D. Centrifugal pump - The travelling speed of cranes varies from_________________?
A. 20 to 30 m/s
B. 10 to 15 m/s
C. 5 to 10 m/s
D. 1 to 2.5 m/s
