AFCAT Science and Technology 3

Question 1

What is the speed of light in vacuum approximately equal to?

Accepted Answer

3 × 10⁸ m/s

Answer

The speed of light in vacuum is approximately 3 × 10⁸ meters per second (299,792,458 m/s precisely).

Question 2

Which process involves the conversion of solid directly into vapor without passing through the liquid phase?

Accepted Answer

Sublimation

Answer

Sublimation is the direct phase transition from solid to gas without passing through the liquid state, as seen with dry ice (solid CO₂).

Question 3

In an aircraft, what is the function of an altimeter?

Accepted Answer

Measures the aircraft's altitude above a reference level

Answer

An altimeter measures the aircraft's altitude above a reference level (usually mean sea level) using atmospheric pressure readings.

Question 4

Which element is the primary component of steel?

Accepted Answer

Iron

Answer

Iron is the primary component of steel, which is an alloy of iron with small amounts of carbon and other elements.

Question 5

What type of lens is used in a simple magnifying glass?

Accepted Answer

Convex (converging) lens

Answer

A convex (converging) lens is used in a magnifying glass because it bends light rays inward, creating a magnified virtual image.

(AFCAT) Air Force Common Admission Test Practice Test