In 2024, which new high-speed railway corridor received major funding approval?

The correct answer is A: Mumbai-Ahmedabad corridor. The Mumbai-Ahmedabad high-speed railway corridor continues to receive major funding for rapid implementation.

What is the primary component of natural gas?

The correct answer is C: Methane. Methane (CH4) is the primary component of natural gas, making up about 70-90% of its composition.

What is the total length of Indian Railways as of 2024?

The correct answer is B: Approximately 72,000 km. As of 2024, Indian Railways operates approximately 72,000 km of track, making it the fourth largest railway network in the world.

Which of the following is NOT a category of railway ticket in Indian Railways?

The correct answer is D: Exclusive. Indian Railways issues Reserved, Unreserved, and Premium tickets. 'Exclusive' is not an official ticket category in Indian Railways.

If a train increases its speed from 60 km/h to 90 km/h, what is the percentage increase?

The correct answer is C: 50%. Percentage increase = [(90-60)/60] × 100 = (30/60) × 100 = 50%

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Railway RRB / NTPC
General Science

NTPC, Group D, JE — all sections

31 Q 5 Topics Take Mock Test

Difficulty: All Easy Medium Hard 21–30 of 31

Topics in Railway RRB / NTPC

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

Q.21 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.22 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.23 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.24 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.25 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.26 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.27 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.28 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.29 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

Q.30 Easy General Science

What is the SI unit of electric current?

A Volt

B Ampere

C Ohm

D Watt

Correct Answer: B. Ampere

EXPLANATION

Ampere (A) is the SI unit of electric current. Volt is for potential difference, Ohm for resistance, and Watt for power.

Test

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