OFAI OFAI - Firefighter Aptitude Test Ontario Mechanical Aptitude and Physical Sciences Questions and Answers

Question 1

A firefighter is using a lever to lift a heavy object. If the effort arm is 6 feet and the load arm is 2 feet, what is the mechanical advantage?

Accepted Answer

3

Answer

2

Answer

4

Answer

6

Question 2

Water is being pumped through a hose. If the hose diameter is decreased, what happens to the water pressure at the nozzle?

Accepted Answer

It increases

Answer

It decreases

Answer

It stays the same

Answer

It becomes zero

Question 3

A pulley system has 4 rope segments supporting a load. What is the mechanical advantage of this system?

Accepted Answer

4

Answer

1

Answer

2

Answer

8

Question 4

Which of the following best describes why a firefighter should not cut an electrical wire under tension?

Accepted Answer

The wire may snap back and cause injury

Answer

The wire will lose its insulation

Answer

The wire becomes magnetic when cut

Answer

The wire will not conduct electricity after cutting

Question 5

A fire engine pump is rated at 1,000 gallons per minute (GPM). If two hose lines each require 250 GPM, how many such lines can the pump fully supply?

Accepted Answer

4

Answer

2

Answer

3

Answer

5

Question 6

What effect does increasing temperature have on the pressure inside a sealed container of gas?

Accepted Answer

Pressure increases

Answer

Pressure decreases

Answer

Pressure stays the same

Answer

The gas condenses