FireTEAM Test FireTEAM Mechanical Aptitude 5

Question 1

Steam at high pressure escapes from a cracked pipe fitting. Which principle best explains why the escaping steam cools rapidly as it expands into the atmosphere?

Accepted Answer

Adiabatic expansion

Answer

Adiabatic expansion occurs when a gas expands rapidly without heat exchange, causing temperature to drop.

Question 2

A fire apparatus has a 4-cylinder engine. Two cylinders are not firing. What is the most likely effect on engine output?

Accepted Answer

Power decreases by roughly 50%

Answer

With half the cylinders firing, the engine produces approximately half its rated power output.

Question 3

A wrench applies torque to a bolt. If you double the length of the wrench handle, how does the torque change for the same applied force?

Accepted Answer

Torque doubles

Answer

Torque = force × distance; doubling the handle length doubles the torque for the same applied force.

Question 4

A check valve in a fire suppression system serves what primary purpose?

Accepted Answer

Prevent backflow

Answer

A check valve allows fluid to flow in only one direction, preventing backflow in the system.

Question 5

Comparing copper wire to aluminum wire of the same gauge, which statement about electrical conductivity is correct?

Accepted Answer

Copper conducts electricity better than aluminum

Answer

Copper has higher electrical conductivity than aluminum, making it more efficient for the same wire size.

FireTEAM Practice Test

FireTEAM Practice Test

FireTEAM Test FireTEAM Mechanical Aptitude 5