AFCAT Science and Technology 5

Question 1

What is the principle behind a nuclear reactor generating electricity?

Accepted Answer

Fission of heavy nuclei releases heat that drives steam turbines

Answer

Nuclear reactors use controlled fission of heavy nuclei (like U-235) to produce heat, which generates steam to drive turbines for electricity production.

Question 2

Which scientist formulated the three laws of planetary motion?

Accepted Answer

Johannes Kepler

Answer

Johannes Kepler formulated three laws of planetary motion describing the elliptical orbits of planets around the Sun.

Question 3

Which gas is used in fire extinguishers to smother fires by displacing oxygen?

Accepted Answer

Carbon dioxide

Answer

Carbon dioxide (CO₂) is commonly used in fire extinguishers because it displaces oxygen and does not conduct electricity or leave residue.

Question 4

What is the function of a transistor in electronic circuits?

Accepted Answer

Amplifies or switches electronic signals

Answer

A transistor acts as an amplifier or electronic switch, forming the fundamental building block of modern electronic devices.

Question 5

Which Indian space mission was the first to successfully enter Mars orbit in its maiden attempt?

Accepted Answer

Mangalyaan (Mars Orbiter Mission)

Answer

Mangalyaan (Mars Orbiter Mission) launched in 2013 made India the first country to reach Mars orbit on its first attempt and at the lowest cost.

(AFCAT) Air Force Common Admission Test Practice Test

(AFCAT) Air Force Common Admission Test Practice Test

AFCAT Science and Technology 5