FCTC FREE FCTC Test Mechanical Reasoning Principles Questions and Answers 3

Question 1

A ball rolls off a horizontal table at 5 ft/s. Ignoring air resistance, what happens to its horizontal velocity as it falls?

Accepted Answer

It remains constant

Answer

It increases

Answer

It decreases

Answer

It becomes zero

Question 2

Two identical springs are connected in parallel (side by side) and support a load together. Compared to a single spring, the combined stiffness is:

Accepted Answer

Double

Answer

Half

Answer

The same

Answer

Four times

Question 3

Water flows through a pipe that narrows from 4 inches to 2 inches in diameter. What happens to the water's velocity in the narrow section?

Accepted Answer

It quadruples

Answer

It doubles

Answer

It halves

Answer

It stays the same

Question 4

A steel block and an aluminum block of the same size are heated equally. Which expands more?

Accepted Answer

Aluminum, because it has a higher thermal expansion coefficient

Answer

Steel, because it is denser

Answer

Both expand equally

Answer

Neither expands significantly

Question 5

A car engine produces 200 ft-lbs of torque at 3,000 RPM. Which change would produce the greatest increase in output power?

Accepted Answer

Doubling the RPM to 6,000 while maintaining torque

Answer

Doubling torque to 400 ft-lbs at the same 3,000 RPM

Answer

Increasing RPM by 50% to 4,500

Answer

Decreasing RPM while doubling torque

Question 6

A block sits on an inclined surface at 30° and does not slide. Which force prevents it from sliding down?

Accepted Answer

Static friction

Answer

Kinetic friction

Answer

Normal force

Answer

Gravity component along the plane