99. In overhead travelling cranes
A. continuous duty motors are preferred
B. slow speed motors are preferred
C. short time rated motors are preferred
D. none of these

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100. Light duty cranes are generally used in
A. automobile workshops
B. pumping stations
C. power houses
D. all of these

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101. Heavy duty cranes are used in
A. heavy engineering workshops
B. steel plants
C. ore handling plants
D. all of these

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102. Drive which can be used for derricks and winches is
A. D.C. motors
B. slip-ring induction motor with variable resistance
C. pole changing squirrel cage motors
D. all of these

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103. Motors, because of their inherent characteristics motor, best suited for the rolling mills are
A. D.C. motors
B. slip ring induction motors
C. squirrel cage induction motors
D. single-phase motors.

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104. Motor preferred for kiln drives is usually
A. slip-ring induction motor
B. three phase shunt wound commutator motor
C. cascade controlled a.c. motor
D. all of these

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105. Motor preferred for blowers is
A. wound rotor induction motor
B. D.C. shunt motor
C. squirrel cage induction motors
D. D.C. series motor.

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