Railway RRB / NTPC - MCQ Practice Questions

Percentage increase = (100-80)/80 × 100 = $\frac{20}{80}$ × 100 = 25%

IRSS refers to Integrated Railway Signal System used in modern Indian Railways for safe train operations.

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

As per Indian Railways norms, the maximum permissible speed for narrow gauge (NG) trains (track gauge of 762 mm or 610 mm) is 60 km/h. Broad gauge trains can run up to 160 km/h (and higher on select corridors), while metre gauge trains are generally limited to 100 km/h. Narrow gauge lines, being the smallest gauge used by Indian Railways, have the lowest maximum speed limit of 60 km/h due to their track design and infrastructure constraints.

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

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

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

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

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

EMU stands for Electric Multiple Unit, which refers to electric trains that have distributed motor units in multiple cars.

Railway buffers are elastic devices that absorb impact and shock during coupling and uncoupling of coaches.

Railway stations in India are classified from Category A to F. Category H does not exist in the classification system.

# Solution: Rail Track Gauge Distance

Rail gauge refers to the distance between the inner edges of the two parallel rails on a railway track. India uses three different gauges, and broad gauge is the widest standard in use.

Step 1: Understand Rail Gauge Types

Different countries and regions use standardized rail gauges:

Step 2: Identify Broad Gauge Specification

Broad gauge is the largest standard gauge used in India and several other countries. It is designed to provide:

Step 3: Recognize the Standard Measurement

The distance between rail tracks in broad gauge is standardized at:

This measurement is maintained uniformly across all broad gauge railway lines.

**Answer: The distance between rail tracks in broad gauge is $1.676$ meters (Option C)**

A turntable is used to rotate locomotives 180 degrees to change their direction without requiring them to travel backward.

Eastern Railway has its headquarters in Kolkata (formerly Calcutta), one of the oldest railway zones in India.

This is a factual question about Indian railway infrastructure standards. The standard thickness of rail in the Indian broad gauge system is a fixed specification established by Indian Railways.

Step 1: Understand Broad Gauge Specifications

Indian Railways uses three gauge types: broad gauge (1676 mm), meter gauge (1000 mm), and narrow gauge (762 mm). The broad gauge is the primary network. Rail thickness is a standardized dimension for structural integrity and load-bearing capacity.

Step 2: Identify Rail Thickness Standard

The standard thickness of rail in the Indian broad gauge system is established by the Indian Railway Standards (IRS). This specification ensures uniform quality, durability, and safe operation across all broad gauge tracks.

Step 3: Eliminate Incorrect Options

Step 4: Confirm the Answer

The Indian Railways broad gauge system uses rails with a standard thickness of 15.5 mm. This specification has been maintained across the entire broad gauge network to ensure consistency and safety.

Answer: 15.5 mm (Option A)

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Note for students: This is a factual recall question commonly asked in RRB/NTPC exams. Memorize that Indian broad gauge rail thickness = 15.5 mm. Other related standards: rail head width ≈ 67 mm, rail foot width ≈ 90 mm.

Grade crossing gates control road traffic at level crossings to ensure safety when trains pass through.

Welded joints (including Continuous Welded Rail or CWR) are preferred in modern railways as they reduce vibration and wear.

Remaining time = 6 - 2 = 4 hours. New speed required = $\frac{360}{4}$ = 90 km/h.

# Railway Zones in India — Coverage Analysis

To answer this question, we need to identify which railway zone operates across the most number of states in India.

Step 1: Identify the Northeast Frontier Railway (NFR) coverage

The Northeast Frontier Railway is headquartered in Guwahati and operates across the northeastern states of India. It covers:

This gives a total of 8 states.

Step 2: Compare with other major zones

Step 3: Verify the maximum coverage

The Northeast Frontier Railway clearly operates across the maximum number of states (8 states) compared to the other listed zones, which each cover only about 4 states.

Answer: The Northeast Frontier Railway (NFR) covers the maximum number of states in India with 8 states in the northeast region. (Option D)