A Best Way To Crack Gorenment Job Exams

Electrical Engineering Objective Questions { Utilisation of Electrical Energy }

15. In case of centrifugal pumps the starting torque is generally
A. double the running torque
B. slightly more than running torque
C. same as running torque
D. less than running torque

16. Motor preferred for synthetic fibre mills is
A. D.C. Series motor
B. reluctance motor
C. D.C. Shunt motor
D. synchronous motor

17. Reluctance motor is a
A. self-starting type synchronous motors
B. low torque variable speed motor
C. variable torque motor
D. low noise, slow speed motor

18. Ward-Leonard controlled d.c. drives are generally used for
A. light duty excavators
B. medium duty excavators
C. heavy duty excavators
D. all of these

19. In case of contactors the ratio of the inservice period to the entire period,expressed as a percentage is known as
A. duty
B. load factor
C. class of contact
D. none of these

20. A magnetic amplifier can be used for the control of
A. current
B. voltage
C. speed
D. all of these

21. In a contactor, overheating of contacts may result from
A. high inductive loads
B. copper oxide on contacts
C. carrying load continuously for a longer time
D. all of these

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