What percentage of India's freight traffic is carried by railways?

The correct answer is B: 55%. Railways carry approximately 55% of India's freight traffic, making it crucial for cargo transportation.

What is the standard distance between two railway sleepers on a broad gauge track?

The correct answer is C: 0.8 m. The standard spacing between sleepers on broad gauge is 0.8 meters (or approximately 30-32 inches).

What is the primary function of a railway turntable?

The correct answer is B: To rotate locomotives and change their direction. A turntable is used to rotate locomotives 180 degrees to change their direction without requiring them to travel backward.

The pH scale ranges from:

The correct answer is B: 0 to 14. The pH scale ranges from 0 to 14, where 7 is neutral, below 7 is acidic, and above 7 is basic/alkaline.

What is the maximum permissible speed for passenger trains on Indian Railways (in general)?

The correct answer is C: 120 km/h. The maximum permissible speed for most passenger trains on Indian Railways is 120 km/h under normal circumstances.

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Railway RRB / NTPC

NTPC, Group D, JE — all sections

132 Q 5 Topics Take Mock Test

Difficulty: All Easy Medium Hard 121–130 of 132

Topics in Railway RRB / NTPC

All General Science 100 Mathematics 18 Current Affairs (Railway) 100 Indian Railway GK 100 Technical Knowledge (NTPC) 100

Q.121 Easy General Science

Which organ in the human body is responsible for filtering blood and producing urine?

A Liver

B Pancreas

C Kidney

D Heart

Correct Answer: C. Kidney

EXPLANATION

Kidneys filter waste products from the blood to produce urine. Each person typically has two kidneys.

Test

Q.122 Easy General Science

What is the chemical formula of table salt?

A KCl

B NaCl

C CaCl2

D MgCl2

Correct Answer: B. NaCl

EXPLANATION

Table salt is sodium chloride (NaCl), composed of sodium and chlorine ions.

Test

Q.123 Easy General Science

Which gas is essential for respiration in humans?

A Nitrogen

B Carbon dioxide

C Oxygen

D Hydrogen

Correct Answer: C. Oxygen

EXPLANATION

Oxygen is essential for aerobic respiration in humans. It is used by mitochondria to produce ATP.

Test

Q.124 Easy General Science

At what temperature does water boil at standard atmospheric pressure?

A 90°C

B 100°C

C 110°C

D 120°C

Correct Answer: B. 100°C

EXPLANATION

Water boils at 100°C (373.15 K) at standard atmospheric pressure of 1 atm.

Test

Q.125 Easy General Science

What is the SI unit of electrical resistance?

A Ohm

B Ampere

C Volt

D Watt

Correct Answer: A. Ohm

EXPLANATION

The SI unit of electrical resistance is Ohm (Ω), named after Georg Simon Ohm.

Test

Q.126 Easy General Science

The process by which plants make their own food using sunlight is called:

A Respiration

B Photosynthesis

C Transpiration

D Fermentation

Correct Answer: B. Photosynthesis

EXPLANATION

Photosynthesis is the process where plants convert sunlight, water, and CO2 into glucose and oxygen.

Test

Q.127 Easy General Science

Which planet is known as the Red Planet?

A Venus

B Mars

C Jupiter

D Saturn

Correct Answer: B. Mars

EXPLANATION

Mars is called the Red Planet due to the presence of iron oxide (rust) on its surface.

Test

Q.128 Easy General Science

Which of the following is an example of a chemical change?

A Melting of ice

B Rusting of iron

C Boiling of water

D Dissolving salt in water

Correct Answer: B. Rusting of iron

EXPLANATION

Rusting of iron is a chemical change as a new substance (iron oxide) is formed. Others are physical changes.

Test

Q.129 Easy General Science

The speed of light in vacuum is approximately:

A 3 × 10^8 m/s

B 3 × 10^7 m/s

C 3 × 10^6 m/s

D 3 × 10^9 m/s

Correct Answer: A. 3 × 10^8 m/s

EXPLANATION

The speed of light in vacuum is approximately 3 × 10^8 m/s or 299,792,458 m/s.

Test

Q.130 Easy General Science

Which element has the atomic number 8?

A Nitrogen

B Oxygen

C Carbon

D Hydrogen

Correct Answer: B. Oxygen

EXPLANATION

Oxygen has atomic number 8. It is essential for respiration in living organisms.

Test

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