106. Wound rotor and squirrel-cage motors with high slip which develop maximum torque at stand still are used for
A. presses and punches
B. machine tools
C. elevators
D. all of these
107. Belted slip ring induction motor is almost invariably used for
A. centrifugal blowers
B. water pumps
C. jaw crushers
D. heavy load
108. In jaw crushers, generally a motor has to start against
A. low load
B. medium load
C. normal load
D. heavy load
109. Motor preferred l for synthetic fibre mills is
A. D.C. Series motor
B. reluctance motor
C. D.C. Shunt motor
D. synchronous motor
110. Power factor in case of reluctance motor is
A. nearly unity
B. always leading
C. 0.8 lagging
D. 0.3 to 0.4 leading
111. A reluctance motor on over load runs as
A. synchronous motor
B. induction motor
C. both and above
D. none of the above
112. In case of contactors, the contacts are generally made of
A. copper
B. silver
C. cadmium copper
D. all of these
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