Q.1
The function of power modulator isregulate the power flow from source to the motor to enable the motor todevelop the torque speed characteristics required by the load
  • True
  • False
Q.2
The process of converting Fixed DC voltage into variable DC Voltage is called as-------------------------
  • Chopper
  • Inverter
  • Rectifier
  • Cycloconverter
Q.3
The basic elements of a electric drive are
  • electric motor.
  • control system.
  • electrical motor and control system.
  • none of the above
Q.4
In __________ drive each machine is driven by its own separate motor with the help of gears and pulley
  • Individual drive
  • Multimotor drive
  • Group Drive
  • None of the above
Q.5
Which of the following is the basic elements of a electric drive?
  • Control system
  • Electric motor
  • Both
  • None of the above
Q.6
Which of the following type electric drive is used in cranes?
  • Individual
  • Multimotor
  • Group
  • None of the Above
Q.7
Which of the following was the first city in india to adapt electric traction
  • Kolkata
  • Mumbai
  • Delhi
Q.8
Drives are nothing but
  • power electronics
  • motors
  • controllers
  • combination of all
Q.9
The value of the frequency of the DC supply.
  • 0 Hz
  • 50 Hz
  • 20 Hz
  • 10 Hz
Q.10
In case of ________ free running and coasting periods are generally long.
  • main-line service
  • urban service
  • sub-urban service
  • all of the above
Q.11
Overhead lines for power supply to tramcars are at a minimum height of
  • 3 m
  • 6 m
  • 10 m
  • tO m
Q.12
The return circuit for tramcars is through
  • neutral wire
  • rails
  • cables
  • common earthing
Q.13
_______ frequency is not common in low frequency traction system
  • 40 Hz
  • 25 Hz
  • 16 Hz
  • all
Q.14
ForkV single phase system power supply frequency is
  • 60 Hz
  • 50 Hz
  • 25 Hz
  • 16 Hz
Q.15
Power for lighting in passanger coach, in a long distance electric train, is provided
  • directly through overhead electric line
  • through individual generator of bogie and batteries
  • through rails
  • through locomotive
Q.16
In India, electrification of railway track was done for the first time in which of thefollowing years ?
  • 1820—1825
  • 1880—1885
  • 1925—1932
  • 1947—1954
Q.17
Which of the following happens in Kando system ?
  • Three phase is converted into
  • Single phase A
  • is converted into
Q.18
For which of the following locomotives the maintenance requirements are theleast?
  • Steam locomotives
  • Diesel locomotives
  • Electric locomotives
  • Equal in all of the above
Q.19
Which of the following happens in Kando system ?
  • Three phase is converted into
  • Single phase A
  • is converted into
Q.20
The value of the frequency of the DC supply.
  • 0 Hz
  • 50 Hz
  • 20 Hz
  • 10 Hz
0 h : 0 m : 1 s