A. is provided with slip rings
B. requires starting gear
C. has high cost
D. is compact
Related Mcqs:
- 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 - Which of the following motors always starts on load ?
A. Conveyor motor
B. Floor mill motor
C. Fan motor
D. All of the above - The starting torque in case of centrifugal pumps is generally_________________?
A. less than running torque
B. same as running torque
C. slightly more than running torque
D. double the running torque - The starting torque of a D.C. motor is independent of which of the following?
A. Flux
B. Armature current
C. Flux and armature current
D. Speed - In a paper mill where constant speed is required________________?
A. synchronous motors are preferred
B. A.C. motors are preferred
C. individual drive is preferred
D. group drive is preferred - In case of _______________ speed control by injecting e.m.f. in the rotor circuit is possible?
A. d.c. shunt motor
B. schrage motor
C. synchronous motor
D. slip ring induction motor - In which of the following applications variable speed operation is preferred ?
A. Exhaust fan
B. Ceiling fan
C. Refrigerator
D. Water pump - The characteristics of drive for crane hoisting and lowering are which of the following ?
A. Precise control
B. Smooth movement
C. Fast speed control
D. All of the above - Which of the following motors is preferred for boom hoist of a travelling crane ?
A. Single phase motor
B. Synchronous motor
C. A.C. slip ring motor
D. Ward-Leonard controlled D.C. shunt motor - Belted slip ring induction motor is almost invariably used for_________________?
A. water pumps
B. jaw crushers
C. centrifugal blowers
D. none of the above
