Top 250+ Solved Control of Electric Drives MCQ Questions Answer
Q. Long distance railways use which of the following ?
a. 200 V D.C.
b. 25 kV single phase A.C.
c. 25 kV two phase A.C.
d. 25 kV three phase A.C.
Q. The speed of a locomotive is controlled by
a. flywheel
b. gear box
c. applying brakes
d. regulating steam flow to engine
Q. Main traction systems used in India are, those using
a. electric locomotives
b. diesel engine locomotives
c. steam engine locomotives
d. all of the above
Q. For diesel locomotives the range of horsepower is
a. 50 to 200
b. 500 to 1000
c. 1500 to 2500
d. 3000 to 5000
Q. _______ locomotive has the highest operational availability.
a. Electric
b. Diesel
c. Steam
d. none
Q. The horsepower of steam locomotives is
a. upto 1500
b. 1500 to 2000
c. 2000 to 3000
d. 3000 to 4000
Q. The overall efficiency of steam locomotive is around
a. 5 to 10 percent
b. 15 to 20 percent
c. 25 to 35 percent
d. 35 to 45 percent
Q. In tramways which of the following motors is used ?
a. D.C. shunt motor
b. D.C. series motor
c. A.C. three phase motor
d. AC. single phase capacitor start motor
Q. In a steam locomotive electric power is provided through
a. overhead wire
b. battery system
c. small turbo-generator
d. diesel engine generator
Q. Which of the following drives is suitable for mines where explosive gas exists ?
a. Steam engine
b. Diesel engine
c. Battery locomotive
d. Any of the above
Q. Overload capacity of diesel engines is usually restricted to
a. 2 percent
b. 10 percent
c. 20 percent
d. 40 percent
Q. The wheels of a train, engine as well as bogies, are slightly tapered to
a. reduce frietion
b. increase friction
c. facilitate braking
d. facilitate in taking turns
Q. The efficiency of diesel locomotives is nearly
a. 20 to 25 percent
b. 30 to 40 percent
c. 45 to 55 percent
d. 60 to 70 percent
Q. Which of the following is the advantage of electric braking ?
a. It avoids wear of track
b. Motor continues to remain loaded during braking
c. It is instantaneous
d. More heat is generated during braking
Q. Which of the following braking systems on the locomotives is costly ?
a. Regenerative braking on electric locomotives
b. Vacuum braking on diesel locomo-tives
c. Vacuum braking on steam locomo-tives
d. All braking systems are equally costly