AFCAT Science and Technology 4

Question 1

What is the phenomenon where a sound wave's observed frequency changes due to the relative motion between source and observer?

Accepted Answer

Doppler Effect

Answer

The Doppler Effect describes the change in observed frequency of a wave when the source and observer are in relative motion.

Question 2

Which component of a jet engine compresses incoming air before it enters the combustion chamber?

Accepted Answer

Compressor

Answer

The compressor draws in and pressurizes air before it enters the combustion chamber, increasing the efficiency of combustion.

Question 3

What does DNA stand for?

Accepted Answer

Deoxyribonucleic Acid

Answer

DNA stands for Deoxyribonucleic Acid, the molecule that carries genetic information in living organisms.

Question 4

Which type of orbit keeps a satellite stationary relative to a point on Earth's surface?

Accepted Answer

Geostationary Orbit (GEO)

Answer

Geostationary Orbit at approximately 35,786 km altitude allows a satellite to match Earth's rotation and remain fixed over one point.

Question 5

Which principle states that it is impossible to simultaneously know the exact position and momentum of a subatomic particle?

Accepted Answer

Heisenberg Uncertainty Principle

Answer

Heisenberg's Uncertainty Principle states that the more precisely position is known, the less precisely momentum can be known, and vice versa.

(AFCAT) Air Force Common Admission Test Practice Test