ASE Truck Equipment Installation & Repair 2

Question 1

When mounting a PTO (Power Take-Off) to a transmission, what is the most critical measurement to verify before final installation?

Accepted Answer

Gear backlash between the PTO and transmission gears

Answer

Proper gear backlash prevents premature wear and noisy operation of the PTO drive.

Question 2

A dump body hoist fails to lift fully under load but works fine empty. What is the most likely cause?

Accepted Answer

Low hydraulic fluid or a worn pump

Answer

Insufficient hydraulic pressure from low fluid or pump wear shows up only under load.

Question 3

What is the primary purpose of a safety prop (body prop) on a dump truck?

Accepted Answer

To hold the raised body up while someone works beneath it

Answer

The body prop mechanically supports a raised dump body so hydraulic failure won't cause it to drop on a worker.

Question 4

When installing a liftgate, why must the truck frame be reinforced at the mounting points?

Accepted Answer

To distribute the concentrated load and prevent frame cracking

Answer

Liftgates impose high cyclical loads that can crack an unreinforced frame.

Question 5

Which hydraulic component regulates the maximum pressure in a truck body lift system?

Accepted Answer

Relief valve

Answer

A relief valve limits system pressure to protect hoses, cylinders, and the pump.

ASE Practice Test