B. at the end connections
C. at the end terminals
D. anywhere on the winding inside a slot
A. D.C. shunt motor
B. Repulsion start and induction run motor
C. Universal motor
A. always leading
C. unity
D. unity to 0.8 leading
A. Hysteresis motor
B. Induction motor
D. Schrage motor
A. thin wire placed at the bottom of the slots
B. thick wire placed at the top of the slots
C. thin wire placed at the top of the slots
A. positive slip
B. zero slip
D. negative slip
B. run for about 1 minute
C. picked up about 10 to 25 per cent of rated speed
D. run for about 5 minutes
B. compensating winding
C. field winding
D. rotor winding
A. 80% to 90%
C. 95% to 99%
D. 50% to 75%
B. inherently self-starting with low torque
C. inherently non-self-starting with high torque
D. inherently self-starting with high torque
A. reconnects the auxiliary winding of the motor
C. reconnects the main winding the motor
D. disconnects main winding of the motor
B. the running winding is connected through a centrifugal switch
C. both starting and running windings are connected through a centrifugal switch
D. centrifugal switch is used to control supply voltage
A. thermal relay
B. none of the above
C. centrifugal switch
B. the motor will run in reverse direction
C. the motor will run in the same direction at reduced r.p.m
D. the motor will run
A. it revolves synchronously
B. it is not subject to any magnetic or mechanical vibrations
C. it can be easily manufactured in extremely small sizes of up to 1 W output
A. spark at light loads
B. run faster
C. run slower
A. none of the above
B. field winding
C. armature winding
B. It is not easily reversed
C. It requires more maintenance of commutator and other mechanical devices
D. It makes quite a bit of noise on starting
B. V-belts
C. chains
D. brakes
B. brush axis coincides with the field axis
C. brush axis is at 90 electrical to the field axis
A. 30 to 40
B. 100
D. 80 to 90
B. 3-phase synchronous motor
C. universal motor
A. is independent of brush shift
B. is opposite to that of brush shift
B. d.c. series motor
C. reluctance motor
D. shaded pole motor
A. Reluctance motor
B. Synchronous motor
D. Repulsion motor
B. improves the efficiency
C. helps the rotor teeth to remain under the stator teeth
D. improves the power factor
A. Split phase motor
C. Shaped pole motor
D. Capacitor start motor
A. Shaded pole motor
C. Capacitor run motor
D. Hysteresis motor
A. less than the rated torque
C. more than i.he rated torque
D. rated torque
A. series motor
B. shunt motor
D. separately excited motor
A. Series motor
B. Repulsion motor
A. shorted armature winding
B. shorted field winding
C. open armature winding
D. high commutator mica
A. high resistance and low inductance
C. low resistance as well as low inductiance
D. high resistance as well as high inductance
A. spark excessively
B. have poor power factor
D. have poor efficiency
B. induced current in rotor due to variations of flux
C. none of the above
D. fine copper wire winding
B. Two value capacitor motor
D. Shaded pole motor
B. increase the torque
D. reduce the effects of armature reaction
A. the motor will consume less power
B. torque will increase
C. motor will run in reverse direction
A. several times the full load current
C. less than full load current
D. equal to full load current
A. thick wire placed at the top of the slots
C. thin wire placed at the bottom of the slots
D. thick wire placed at the bottom of the slots
A. It has low starting as well as rushing currents
B. It has high starting torque
C. It is a reversing motor
A. Universal motor
B. Split phase motor
C. Reluctance motor
A. to improve torque
B. reduce fluctuations in torque
D. increase overload capacity
A. capacitor run motor
C. repulsion motor
D. hysteresis motor
A. fans
C. mixer grinders
D. blowers
A. interchanging the supply leads
B. retentivity of the rotor material
D. none of these
A. brush axis is 45 electrical to field axis
C. brush axis is 90 electrical to field axis
B. repulsion induction motor
D. repulsion motor
A. voltage rating
B. dielectric medium
D. definite value
B. good power factor
C. minimum cost
D. high efficiency
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