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Electrical Engineering Question Answers- June 2018

Question No. 1. In a stepper motor the angular displacement
(A) it cannot be used for positioning of work tables and tools in NC machines.
(B) it cannot be readily interfaced with micro computer based controller.
(C) the angular displacement cannot be precisely controlled.
(D) can be precisely controlled.

Answer: (D) can be precisely controlled.

Question No. 2. A control system working under unknown random actions is called
(a) computer control system
(b) digital data system
(c) stochastic control system
(d) adaptive control system

Answer:

Question No. 3. An ammeter is a
(a) recording instrument
(b) absolute instrument
(c) secondary instrument
(d) integrating instrument

Answer: (c) secondary instrument


Question No. 4 Out of the following methods of heating the one which is independent of supply
frequency is
(A) electric arc heating
(B) induction heating
(C) electric resistance heating
(D) dielectric heating
 Answer: (C) electric resistance heating

Question No. 5. Which of the following part plays important role in over speed protection of a generator ?

(A) Over current relay

(B) Alarm

(C) Differential protection

(D) Governor.

Answer: (D) Governor.

 Question No. 6. In a low power factor wattmeter the pressure coil is connected
(a) to the supply side of the current coil
(b) to the load side of the current coil
(c) in any of the two meters at connection
(d) none of the above

Answer:(b) to the load side of the current coil


Question No. 7. The torque-speed characteristics of an a.c. operated universal motor has a
______characteristic and it______ be started under no-load condition.
(A) inverse, can
(B) inverse, cannot
(C) nearly inverse, can
(D) nearly inverse, cannot
 Answer: (B) inverse, cannot

Question No. 8. A.C. servomotor is basically a
(a) universal motor
(b) single phase induction motor
(c) three phase induction motor
(d) two phase induction motor
Answer: (d) two phase induction motor
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