CLP Pre-Trip Vehicle Inspection 4

Question 1

What is the purpose of checking the slack adjusters during a pre-trip inspection?

Accepted Answer

To ensure brakes are properly adjusted so they apply evenly

Answer

Checking slack adjusters ensures each brake is adjusted properly so all brakes apply with equal force, preventing pulling or uneven stopping.

Question 2

When inspecting the fuel system during a pre-trip, what are you looking for around the fuel tanks?

Accepted Answer

Leaks, secure mounting, and properly capped tanks

Answer

You visually check for fuel leaks, verify tanks are securely mounted, and confirm filler caps are tight to prevent spills or fires.

Question 3

During a pre-trip inspection of the lighting system, which lights must be functional for daytime operation?

Accepted Answer

All lights including clearance and marker lights

Answer

All required lights — including clearance lights, marker lights, turn signals, brake lights, and headlights — must function properly at all times.

Question 4

What does it indicate if the air pressure in the brake system drops more than 3 psi per minute during a static leak test?

Accepted Answer

There is a leak in the air system that must be repaired

Answer

A drop of more than 3 psi per minute in a single-vehicle system (or 4 psi in a combination) indicates an unacceptable air leak requiring repair.

Question 5

When inspecting wheels and rims during a pre-trip, what are you looking for on the lug nuts?

Accepted Answer

Rust streaks, missing nuts, or cracks around the bolt holes

Answer

Rust streaks can indicate loose lug nuts rubbing against the wheel, while missing nuts or cracks are direct safety defects.

(CLP) Commercial Learner's Permit Practice Test