Practice Electrical Drives Multiple Choice Questions with Answers Quiz-3 - MCQGeeks.com

Q.1.

The most suitable servo-motor application is __________

AC series motor
DC series motor
AC two-phase induction motor
DC shunt motor

Q.2.

Which of the following methods is used to control speed ofkV,Hz singlephase traction ?

Reduced current method
Tap changing control of transformer
Series parallel operation of motors
All of the above

Q.3.

Which of the following methods is used to control speed ofkV,Hz singlephase traction ?

Reduced current method
Tap changing control of transformer
Series parallel operation of motors
All of the above

Q.4.

For which of the following locomotives the maintenance requirements are theleast?

Steam locomotives
Diesel locomotives
Electric locomotives
Equal in all of the above

Q.5.

When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding.Thus sliding is acute when

wheel base of axles is more
degree of curvature is more
both (A) and (B)
none of the above

Q.6.

Series motor is not suited for traction duty due to which of the following account ?

Less current drain on the heavy load torque
Current surges after temporary switching off supply
Self relieving property
Commutating property at heavy load

Q.7.

Series motor is not suited for traction duty due to which of the following account ?

Less current drain on the heavy load torque
Current surges after temporary switching off supply
Self relieving property
Commutating property at heavy load

Q.8.

Locomotive having monomotor bogies

has better coefficient of adhesion
are suited both for passanger as well as freight service
has better riding qualities due to the reduction of lateral forces
has all above qualities

Q.9.

In main line service as compared to urban and suburban service

distance between the stops is more
maximum speed reached is high
acceleration and retardation rates are low
all of the above