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Railway RRB / NTPC
Technical Knowledge (NTPC)

NTPC, Group D, JE — all sections

100 Q 5 Topics Take Test
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Difficulty: All Easy Medium Hard 71–80 of 100
Topics in Railway RRB / NTPC
What is the standard height of railway platforms in India?
A 600 mm
B 750 mm
C 900 mm
D 1000 mm
Correct Answer:  B. 750 mm
EXPLANATION

The standard height of railway platforms in India is 750 mm (2 feet 6 inches) from rail level.

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A train travels at 75 km/h for 4 hours and then at 60 km/h for 2 hours. What is the average speed?
A 65 km/h
B 67.5 km/h
C 70 km/h
D 72.5 km/h
Correct Answer:  C. 70 km/h
EXPLANATION

Total distance = (75×4) + (60×2) = 300 + 120 = 420 km. Total time = 6 hours. Average speed = 420/6 = 70 km/h

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Which railway zone is the largest in terms of route kilometers?
A Central Railway
B Northern Railway
C Indian Railways (entire network)
D Southern Railway
Correct Answer:  B. Northern Railway
EXPLANATION

The Northern Railway zone has the largest route length among all railway zones in India.

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What is the primary function of anti-collision devices (ACD) in trains?
A To reduce noise pollution
B To prevent train collisions automatically
C To increase passenger comfort
D To reduce fuel consumption
Correct Answer:  B. To prevent train collisions automatically
EXPLANATION

Anti-collision devices are safety systems designed to prevent train-to-train collisions by automatically applying brakes when necessary.

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If a train increases its speed from 60 km/h to 90 km/h, what is the percentage increase?
A 30%
B 40%
C 50%
D 60%
Correct Answer:  C. 50%
EXPLANATION

Percentage increase = [(90-60)/60] × 100 = (30/60) × 100 = 50%

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What does PWAY stand for in railway terminology?
A Permanent Way
B Platform Way
C Passenger Way
D Public Way
Correct Answer:  A. Permanent Way
EXPLANATION

PWAY stands for Permanent Way, which refers to the railway track structure including rails, sleepers, and ballast.

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What is the purpose of a turntable in railway yards?
A To measure train speed
B To rotate locomotives and wagons for repositioning
C To load and unload cargo
D To refuel trains
Correct Answer:  B. To rotate locomotives and wagons for repositioning
EXPLANATION

A turntable is a rotating platform used in railway yards to turn locomotives and wagons for repositioning without reversing.

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If a freight train covers 360 km in 12 hours, what is its average speed?
A 25 km/h
B 30 km/h
C 35 km/h
D 40 km/h
Correct Answer:  B. 30 km/h
EXPLANATION

Average speed = Total distance / Total time = 360 km / 12 hours = 30 km/h

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What is the maximum speed limit for narrow gauge trains in India?
A 60 km/h
B 80 km/h
C 100 km/h
D 120 km/h
Correct Answer:  B. 80 km/h
EXPLANATION

The maximum speed limit for narrow gauge trains in India is typically 80 km/h due to track specifications.

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Which of the following is NOT a type of railway crossing?
A Level crossing
B Grade separation
C Diagonal crossing
D Overhead crossing
Correct Answer:  D. Overhead crossing
EXPLANATION

Railway crossings include level crossings, grade separations, and diagonal crossings. Overhead crossing is not a standard railway crossing type.

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