Question 1

The most suitable servo-motor application is __________

Accepted Answer

A) AC series motor 
B) DC series motor 
C) AC two-phase induction motor 
D) DC shunt motor 
A) AC series motor 
B) DC series motor 
C) AC two-phase induction motor 
D) DC shunt motor D

Question 2

The return circuit for tramcars is through

Accepted Answer

A) neutral wire 
B) rails 
C) cables 
D) common earthing 
A) neutral wire 
B) rails 
C) cables 
D) common earthing B

Question 3

have maximum unbalanced forces

Accepted Answer

A) Diesel shunters 
B) Steam locomotives 
C) Electric locomotives 
D) Diesel locomotives 
A) Diesel shunters 
B) Steam locomotives 
C) Electric locomotives 
D) Diesel locomotives B

Question 4

Overhead lines for power supply to tramcars are at a minimum height of

Accepted Answer

A) 3 m 
B) 6 m 
C) 10 m 
D) 15 m 
A) 3 m 
B) 6 m 
C) 10 m 
D) 15 m

Question 5

Specific energy consumption is affected by which of the following factors ?

Accepted Answer

A) Retardation and acceleration values 
B) Gradient 
C) Distance between stops 
D) All of the above 
A) Retardation and acceleration values 
B) Gradient 
C) Distance between stops 
D) All of the above

Question 6

_______ frequency is not common in low frequency traction system

Accepted Answer

A) 40 Hz 
B) 25 Hz 
C) 16 Hz 
D) all of the above 
A) 40 Hz 
B) 25 Hz 
C) 16 Hz 
D) all of the above

Question 7

Locomotive having monomotor bogies

Accepted Answer

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

Question 8

Which of the following happens in Kando system ?

Accepted Answer

A) Three phase A.C.is converted into D.C. 
B) Single phase A.C.is converted into D.C. 
C) Single phase supply is converted into three phase system 
D) None of the above 
A) Three phase A.C.is converted into D.C. 
B) Single phase A.C.is converted into D.C. 
C) Single phase supply is converted into three phase system 
D) None of the above

Question 9

In case of ________ free running and coasting periods are generally long.

Accepted Answer

A) main-line service 
B) urban service 
C) sub-urban service 
D) all of the above 
A) main-line service 
B) urban service 
C) sub-urban service 
D) all of the above

Question 10

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

Accepted Answer

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

Question 11

the value of the frequency of the DC supply.

Accepted Answer

A) 0 Hz 
B) 50 Hz 
C) 20 Hz 
D) 10 Hz 
A) 0 Hz 
B) 50 Hz 
C) 20 Hz 
D) 10 Hz

Question 12

Energy consumption in propelling the train is required for which of the following?

Accepted Answer

A) Work against the resistance to motion 
B) Work against gravity while moving up the gradient 
C) Acceleration 
D) All of the above 
A) Work against the resistance to motion 
B) Work against gravity while moving up the gradient 
C) Acceleration 
D) All of the above

Question 13

In main line service as compared to urban and suburban service

Accepted Answer

A) distance between the stops is more 
B) maximum speed reached is high 
C) acceleration and retardation rates are low 
D) all of the above 
A) distance between the stops is more 
B) maximum speed reached is high 
C) acceleration and retardation rates are low 
D) all of the above

Question 14

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

Accepted Answer

A) Steam locomotives 
B) Diesel locomotives 
C) Electric locomotives 
D) Equal in all of the above 
A) Steam locomotives 
B) Diesel locomotives 
C) Electric locomotives 
D) Equal in all of the above

Question 15

For 25 kV single phase system power supply frequency is

Accepted Answer

A) 60 Hz 
B) 50 Hz 
C) 25 Hz 
D) 16 Hz 
A) 60 Hz 
B) 50 Hz 
C) 25 Hz 
D) 16 Hz

Question 16

Power for lighting in passanger coach, in a long distance electric train, is provided

Accepted Answer

A) directly through overhead electric line 
B) through individual generator of bogie and batteries 
C) through rails 
D) through locomotive 
A) directly through overhead electric line 
B) through individual generator of bogie and batteries 
C) through rails 
D) through locomotive

Question 17

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

Accepted Answer

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

Question 18

Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?

Accepted Answer

A) Reduced current method 
B) Tap changing control of transformer 
C) Series parallel operation of motors 
D) All of the above 
A) Reduced current method 
B) Tap changing control of transformer 
C) Series parallel operation of motors 
D) All of the above

Question 19

In India, electrification of railway track was done for the first time in which of the following years ?

Accepted Answer

A) 1820-1825 
B) 1880-1885 
C) 1925-1932 
D) 1947-1954 
A) 1820-1825 
B) 1880-1885 
C) 1925-1932 
D) 1947-1954

Question 20

An ideal traction system should have

Accepted Answer

A) easy speed control 
B) high starting tractive effort 
C) equipment capable of with standing large temporary loads 
D) all of the above 
A) easy speed control 
B) high starting tractive effort 
C) equipment capable of with standing large temporary loads 
D) all of the above

The most suitable servo-motor application is __________

The return circuit for tramcars is through

have maximum unbalanced forces

Overhead lines for power supply to tramcars are at a minimum height of

Specific energy consumption is affected by which of the following factors ?

_______ frequency is not common in low frequency traction system

Locomotive having monomotor bogies

Which of the following happens in Kando system ?

In case of ________ free running and coasting periods are generally long.

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

the value of the frequency of the DC supply.

Energy consumption in propelling the train is required for which of the following?

In main line service as compared to urban and suburban service

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

For 25 kV single phase system power supply frequency is

Power for lighting in passanger coach, in a long distance electric train, is provided

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

Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?

In India, electrification of railway track was done for the first time in which of the following years ?

An ideal traction system should have

Electric Motors: Selection, Types, and Applications

Motor Selection and Applications in Various Industries

Motor for Various Applications

Motor and Drive System

Motor and Crane Technology: Understanding the Different Types and Applications

Electric Motors and Drives: Exploring Speed, Control, and Efficiency

Contactors, Motors, and Load Torques

Electrical Drives and Components

Motors and Drives for Industrial Applications

Motor and Power Systems

Locomotives and Train Systems

Filters

Exam 12: Traction Systems and Locomotive Performance

The most suitable servo-motor application is __________

The return circuit for tramcars is through

have maximum unbalanced forces

Overhead lines for power supply to tramcars are at a minimum height of

Specific energy consumption is affected by which of the following factors ?

_______ frequency is not common in low frequency traction system

Locomotive having monomotor bogies

Which of the following happens in Kando system ?

In case of ________ free running and coasting periods are generally long.

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

the value of the frequency of the DC supply.

Energy consumption in propelling the train is required for which of the following?

In main line service as compared to urban and suburban service

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

For 25 kV single phase system power supply frequency is

Power for lighting in passanger coach, in a long distance electric train, is provided

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

Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?

In India, electrification of railway track was done for the first time in which of the following years ?

An ideal traction system should have

Electric Motors: Selection, Types, and Applications

Motor Selection and Applications in Various Industries

Motor for Various Applications

Motor and Drive System

Motor and Crane Technology: Understanding the Different Types and Applications

Electric Motors and Drives: Exploring Speed, Control, and Efficiency

Contactors, Motors, and Load Torques

Electrical Drives and Components

Motors and Drives for Industrial Applications

Motor and Power Systems

Locomotives and Train Systems

Filters