Firefighter II - Chapter 24 Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
What is mechanical engineering’s main contribution to firefighting equipment?
✔✔Designing and improving the mechanical systems that operate fire pumps, ladders, and tools.
Why must firefighters understand basic mechanical principles?
✔✔To safely operate and troubleshoot firefighting equipment.
What type of engine is commonly used in fire apparatus?
✔✔A diesel engine.
What is the purpose of a fire pump on an apparatus?
✔✔To provide high-pressure water for fire suppression.
What mechanical device allows an aerial ladder to rotate?
✔✔A turntable mechanism.
1
,Why must fire hoses withstand mechanical stress?
✔✔Because they experience high pressure and repeated handling.
What is the function of gears in fire apparatus systems?
✔✔They transfer and control power between mechanical parts.
Why is torque important in fire apparatus operations?
✔✔It provides the twisting force needed to move heavy components like ladders.
What does PSI stand for in relation to pumps?
✔✔Pounds per square inch.
What does RPM stand for in engine operations?
✔✔Revolutions per minute.
What is the purpose of a relief valve on a fire pump?
✔✔To protect the system from excessive pressure.
2
, Why must aerial devices be equipped with hydraulic systems?
✔✔To allow smooth and powerful lifting and extension.
What is the purpose of lubrication in fire apparatus components?
✔✔To reduce friction and wear on moving parts.
Why is preventive maintenance important for fire apparatus?
✔✔It ensures reliability during emergency response.
What is the function of bearings in mechanical systems?
✔✔They support rotating parts and reduce friction.
What is the purpose of a transmission in fire apparatus?
✔✔To transfer engine power to the wheels at different speeds.
What is mechanical advantage?
✔✔The gain in force achieved by using a tool or machine.
3
Answers | Latest Version | 2025/2026 |
Correct & Verified
What is mechanical engineering’s main contribution to firefighting equipment?
✔✔Designing and improving the mechanical systems that operate fire pumps, ladders, and tools.
Why must firefighters understand basic mechanical principles?
✔✔To safely operate and troubleshoot firefighting equipment.
What type of engine is commonly used in fire apparatus?
✔✔A diesel engine.
What is the purpose of a fire pump on an apparatus?
✔✔To provide high-pressure water for fire suppression.
What mechanical device allows an aerial ladder to rotate?
✔✔A turntable mechanism.
1
,Why must fire hoses withstand mechanical stress?
✔✔Because they experience high pressure and repeated handling.
What is the function of gears in fire apparatus systems?
✔✔They transfer and control power between mechanical parts.
Why is torque important in fire apparatus operations?
✔✔It provides the twisting force needed to move heavy components like ladders.
What does PSI stand for in relation to pumps?
✔✔Pounds per square inch.
What does RPM stand for in engine operations?
✔✔Revolutions per minute.
What is the purpose of a relief valve on a fire pump?
✔✔To protect the system from excessive pressure.
2
, Why must aerial devices be equipped with hydraulic systems?
✔✔To allow smooth and powerful lifting and extension.
What is the purpose of lubrication in fire apparatus components?
✔✔To reduce friction and wear on moving parts.
Why is preventive maintenance important for fire apparatus?
✔✔It ensures reliability during emergency response.
What is the function of bearings in mechanical systems?
✔✔They support rotating parts and reduce friction.
What is the purpose of a transmission in fire apparatus?
✔✔To transfer engine power to the wheels at different speeds.
What is mechanical advantage?
✔✔The gain in force achieved by using a tool or machine.
3
