Showing 121–130 of 132 questions
Q.121
Easy
Technical Knowledge (NTPC)
What does the term 'gradient' mean in railway engineering?
A
The color of the track
B
The slope or inclination of the track
C
The age of the rail
D
The width of the track
Correct Answer:
B. The slope or inclination of the track
Explanation:
Gradient refers to the slope or angle of incline/decline of the railway track, expressed as a percentage or ratio.
Q.122
Easy
Technical Knowledge (NTPC)
Which of the following is a characteristic of an express train compared to a local train?
A
Lower ticket price
B
Fewer stops and higher speed
C
More stops and lower speed
D
More passenger comfort only
Correct Answer:
B. Fewer stops and higher speed
Explanation:
Express trains have fewer intermediate stops, allowing them to maintain higher average speeds compared to local trains.
Q.123
Easy
Technical Knowledge (NTPC)
In railway signaling, what does a red signal indicate?
A
Proceed with caution
B
Stop - do not proceed
C
Reduce speed
D
Wait for further instructions
Correct Answer:
B. Stop - do not proceed
Explanation:
A red signal in railway signaling is a mandatory stop signal indicating that trains must not proceed beyond that point.
Q.124
Easy
Technical Knowledge (NTPC)
What is the gauge of the Indian railway network that covers the majority of the system?
A
Broad gauge (1676 mm)
B
Meter gauge (1000 mm)
C
Narrow gauge (762 mm)
D
Standard gauge (1435 mm)
Correct Answer:
A. Broad gauge (1676 mm)
Explanation:
Indian railways predominantly use broad gauge (1676 mm) which covers approximately 43,000 km of the total network.
Q.125
Easy
Technical Knowledge (NTPC)
Which of the following is the primary function of a buffer in railway couplings?
A
To increase train speed
B
To absorb shocks and reduce impact between coaches
C
To facilitate uncoupling of trains
D
To improve brake efficiency
Correct Answer:
B. To absorb shocks and reduce impact between coaches
Explanation:
Buffers are spring-loaded devices that absorb shocks and minimize damage during coupling and uncoupling of railway carriages.
Q.126
Easy
Technical Knowledge (NTPC)
In railway terminology, what does 'rake' refer to?
A
A tool used for track maintenance
B
A complete set of coaches or wagons coupled together
C
The slope of the railway track
D
The angle between rails
Correct Answer:
B. A complete set of coaches or wagons coupled together
Explanation:
A 'rake' is a complete formation of railway coaches or wagons that are coupled together to form a train unit.
Q.127
Easy
Technical Knowledge (NTPC)
Which component in a diesel locomotive is responsible for converting chemical energy into mechanical energy?
A
Alternator
B
Transmission system
C
Diesel engine
D
Traction motor
Correct Answer:
C. Diesel engine
Explanation:
The diesel engine is the primary component that converts the chemical energy stored in diesel fuel into mechanical energy through combustion.
Q.128
Easy
Technical Knowledge (NTPC)
What is the role of 'ballast' in railway track construction?
A
To provide electrical conductivity
B
To support the sleepers and distribute load evenly
C
To prevent rust formation on rails
D
To measure train speed
Correct Answer:
B. To support the sleepers and distribute load evenly
Explanation:
Ballast, typically made of crushed stone or gravel, supports the sleepers and distributes the train's weight evenly to the subgrade.
Q.129
Easy
Technical Knowledge (NTPC)
In railway signaling systems, what does a 'yellow signal' indicate?
A
Stop immediately
B
Proceed with caution, prepare to stop at the next signal
C
Clear to proceed at full speed
D
Speed restriction zone
Correct Answer:
B. Proceed with caution, prepare to stop at the next signal
Explanation:
A yellow signal indicates 'caution' - the driver should prepare to stop at the next signal as it may show 'stop' indication.
Q.130
Easy
Technical Knowledge (NTPC)
In a diesel-electric locomotive, what is the primary function of the 'traction motor'?
A
To generate electricity from the diesel engine
B
To convert electrical energy into mechanical motion for driving wheels
C
To compress air for brake systems
D
To regulate fuel supply to the engine
Correct Answer:
B. To convert electrical energy into mechanical motion for driving wheels
Explanation:
The traction motor converts electrical energy into mechanical energy to drive the locomotive wheels through the transmission system.
