Showing 361–370 of 419 questions
Q.361
Easy
Technical Knowledge (NTPC)
Which signal aspect displayed by a signal indicates 'Stop'?
A
Red light only
B
Green light only
C
Yellow light only
D
Flashing green light
Correct Answer:
A. Red light only
Explanation:
A red light signal indicates 'Stop' and the driver must bring the train to a complete halt.
Q.362
Medium
Technical Knowledge (NTPC)
What is the primary function of a railway turntable?
A
To increase train speed
B
To rotate locomotives and change their direction
C
To cool down locomotive engines
D
To separate passenger and freight trains
Correct Answer:
B. To rotate locomotives and change their direction
Explanation:
A turntable is used to rotate locomotives 180 degrees to change their direction without requiring them to travel backward.
Q.363
Medium
Technical Knowledge (NTPC)
Which railway zone headquarters is located in Kolkata?
A
Eastern Railway
B
South Eastern Railway
C
North Eastern Railway
D
Northeast Frontier Railway
Correct Answer:
A. Eastern Railway
Explanation:
Eastern Railway has its headquarters in Kolkata (formerly Calcutta), one of the oldest railway zones in India.
Q.364
Hard
Technical Knowledge (NTPC)
What does ACSM stand for in railway signaling?
A
Automatic Coupling and Safety Module
B
Axle Counter and Signal Management
C
Automatic Colour Signal Module
D
Axle Counting and Safety Monitoring
Correct Answer:
D. Axle Counting and Safety Monitoring
Explanation:
ACSM (Axle Counting and Safety Monitoring) is a modern railway safety system for train detection.
Q.365
Easy
Technical Knowledge (NTPC)
A train covers 240 km in 4 hours, then 180 km in 3 hours. What is its average speed?
A
55 km/h
B
60 km/h
C
65 km/h
D
70 km/h
Correct Answer:
B. 60 km/h
Explanation:
Total distance = 240 + 180 = 420 km. Total time = 4 + 3 = 7 hours. Average speed = 420/7 = 60 km/h.
Q.366
Medium
Technical Knowledge (NTPC)
What is the standard thickness of a rail in the Indian broad gauge system?
A
85 mm
B
90 mm
C
100 mm
D
110 mm
Correct Answer:
C. 100 mm
Explanation:
The standard rail thickness for broad gauge in India is 100 mm (measured at the head of the rail).
Q.367
Easy
Technical Knowledge (NTPC)
If the ratio of express trains to freight trains is 3:5, and there are 24 express trains, how many freight trains are there?
Explanation:
If express:freight = 3:5 and express trains = 24, then 24/3 = 8 (unit value). Freight trains = 5 × 8 = 40.
Q.368
Medium
Technical Knowledge (NTPC)
What is the primary purpose of a railway crossing gate or boom barrier?
A
To regulate train speed
B
To prevent unauthorized entry to railway stations
C
To control road traffic and prevent road vehicles from crossing railway tracks when trains approach
D
To measure train weight
Correct Answer:
C. To control road traffic and prevent road vehicles from crossing railway tracks when trains approach
Explanation:
Grade crossing gates control road traffic at level crossings to ensure safety when trains pass through.
Q.369
Medium
Technical Knowledge (NTPC)
Which type of rail joint is most commonly used in modern Indian railways?
A
Fish-plate joint
B
Welded joint
C
Riveted joint
D
Bolted joint
Correct Answer:
B. Welded joint
Explanation:
Welded joints (including Continuous Welded Rail or CWR) are preferred in modern railways as they reduce vibration and wear.
Q.370
Hard
Technical Knowledge (NTPC)
What does SCADA stand for in railway operations?
A
Supervisory Control and Data Acquisition
B
Signal Control and Dispatch Automation
C
Station Command and Drive Alerting
D
Speed Control and Distance Anticipation
Correct Answer:
A. Supervisory Control and Data Acquisition
Explanation:
SCADA (Supervisory Control and Data Acquisition) is a system for monitoring and controlling railway infrastructure remotely.
