Industrial Drives

A. water pumps
B. jaw crushers
C. centrifugal blowers
D. none of the above

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

A. horsepower rating increases but r.p.m. decreases
B. horsepower rating decreases but r.p.m. increases
C. horsepower rating and operating speed increases
D. horsepower rating and operating speed decreases

A. Type of bearings
B. Type of enclosure
C. Noise
D. Arrangement for power transmis¬sion
E. None of the above

A. A 100 H.P. AC. three phase motor
B. Four motors of 25 H.P. each
C. Five motors of 20 H.P. each
D. Ten motors of 10 H.P. each

A. Shaded pole motor
B. Repulsion motor
C. Capacitor start motor
D. None of the above

A. Unsuitable for heavy duty starting
B. Torque varies as armature current
C. Torque-armature current is a straight line
D. Torque is zero for zero armature current

A. Totally enclosed
B. Totally enclosed fan cooled
C. Open type
D. Semi closed

A. r.p.m. only
B. Horse power only
C. Horse power and r.p.m.
D. Horse power, r.p.m. and power factor

A. Tapped field control
B. Diverter field control
C. Series-parallel control
D. Any of the above