CPS Mechanical Aptitude Principles 2

Question 1

Two gears mesh together. The driver gear has 10 teeth and the driven gear has 30 teeth. If the driver turns at 60 RPM, how fast does the driven gear turn?

Accepted Answer

20 RPM

Answer

A larger driven gear (30 teeth vs 10) turns three times slower: 60 ÷ 3 = 20 RPM.

Question 2

When two meshed gears are in direct contact, how do their rotation directions compare?

Accepted Answer

They rotate in opposite directions

Answer

Two externally meshed gears always turn in opposite directions.

Question 3

A first-class lever has the fulcrum located where?

Accepted Answer

Between the effort and the load

Answer

In a first-class lever, such as a seesaw or crowbar, the fulcrum sits between the effort and the load.

Question 4

To lift a heavy load with the least effort using a lever, where should you apply the force?

Accepted Answer

As far from the fulcrum as possible

Answer

A longer effort arm increases mechanical advantage, reducing the force needed.

Question 5

A fixed single pulley changes which property of an applied force?

Accepted Answer

The direction of the force

Answer

A fixed pulley redirects force but provides no mechanical advantage, so the force magnitude stays the same.

CPS Firefighter Test Practice Test

CPS Firefighter Test Practice Test

CPS Mechanical Aptitude Principles 2