CDL weak-area practice

CDL Pre-Trip Inspection Test 2

Use this set after Pre-Trip Test 1 when inspection misses still repeat by system or defect type.

Study the weak area

What to understand before you answer.

This second pre-trip set helps turn a memorized walk-around into system-level safety decisions.

01

Connect each checked part to the safety problem it prevents.

02

Treat steering, brake, tire, wheel, suspension, leak, and coupling defects as stop-and-correct clues.

03

Choose the action that verifies safe operation before the vehicle moves.

Before the questions

How to improve this score.

Review the pre-trip inspection page.
Answer this second set and group misses by system.
Use the pre-trip systems drill for repeated defect-recognition misses.
Return to a mixed CDL set after the repeated system improves.

Common traps to watch for

Assuming the trailer is secure without a visual coupling check.

When this pattern appears in a missed answer, review the explanation before trying another set.

Treating cargo as the shipper's problem after loading.

When this pattern appears in a missed answer, review the explanation before trying another set.

Thinking emergency equipment matters only after a roadside inspection.

When this pattern appears in a missed answer, review the explanation before trying another set.

Treating mirror movement as a comfort issue instead of a visibility issue.

When this pattern appears in a missed answer, review the explanation before trying another set.

Documenting a serious defect without correcting it before movement.

When this pattern appears in a missed answer, review the explanation before trying another set.

Practice questions

CDL Pre-Trip Inspection Test 2 Quiz

Answered 0 / 20

Question 1

When inspecting a combination vehicle, why must the fifth wheel locking jaws be checked?

To confirm the trailer is securely coupled to the tractor. To adjust the radio antenna. To drain water from the fuel tank. To measure tire tread depth.

Question 2

What should be verified about cargo before driving?

Cargo is secure enough that it will not shift, fall, leak, or create unsafe handling. Cargo is arranged by color. Cargo is loaded only on the left side. Cargo paperwork is hidden from inspectors.

Question 3

Why should the driver confirm emergency equipment is present before a trip?

It may be needed during a breakdown, fire, or roadside emergency. It increases the legal payload. It keeps the engine from overheating. It lets the driver skip inspections.

Question 4

A mirror is loose and will not stay adjusted. Why is this unsafe?

The driver may lose awareness of traffic, trailer position, and blind areas. The truck will not start. The air compressor will cut out too soon. The tires will overinflate.

Question 5

What should a driver do after finding a defect that makes the vehicle unsafe?

Have the defect corrected before operating the vehicle. Drive only during daylight. Write it down but continue the trip. Ask another driver to follow closely.

Question 6

During an engine-compartment inspection, why should you check coolant hoses?

A cracked, leaking, or loose hose can lead to overheating or breakdown. Hoses set the legal vehicle length. Coolant hoses control the stop arm. Hoses replace the need to check tires.

Question 7

What should you look for when inspecting the exhaust system?

Loose, broken, or leaking parts that could create fire or fumes hazards. Only whether the exhaust pipe is shiny. Whether the radio antenna is attached to it. Whether it holds extra cargo.

Question 8

Why should frame members be checked during a pre-trip inspection?

Cracks, bends, or loose parts can affect vehicle strength and control. They determine the color of the cab. They replace suspension checks. They are checked only for cleanliness.

Question 9

A windshield wiper blade is missing before a trip that may include rain. What is the safest decision?

Have it corrected before driving because visibility may be unsafe. Drive only by watching the side mirror. Use the horn more often. Ignore it if the windshield is clean at departure.

Question 10

What is the concern with a cracked windshield in the driver's view?

It can interfere with visibility and may worsen during the trip. It makes the air compressor run faster. It lowers axle weight automatically. It is only a cosmetic issue.

Question 11

When inspecting a tractor-trailer, what should you check about air and electrical lines?

They are connected, secure, not damaged, and not dragging or rubbing. They are painted the same color. They are tied around the landing gear crank. They are disconnected before driving.

Question 12

What should the fifth wheel release handle show during inspection after coupling?

It is in the locked position and the coupling is secure. It is pulled open for easier turning. It is tied with rope instead of locked. It is removed from the vehicle.

Question 13

Why should trailer landing gear be checked after coupling?

It should be fully raised and secured so it does not strike the road. It should be left halfway down for balance. It replaces the fifth wheel lock. It controls the trailer brakes.

Question 14

During tire inspection, why should you check for mismatched tire sizes on the same axle?

Mismatched tires can affect handling, load sharing, and tire safety. It makes the horn quieter. It improves braking automatically. It is required only on buses.

Question 15

What should be checked on lug nuts during a wheel inspection?

Missing, loose, damaged, or rust-streaked fasteners that may indicate looseness. Only whether they are painted. Only whether the hubcap covers them. Whether they are warm to the touch before driving.

Question 16

Why is hub oil or axle seal leakage a pre-trip concern?

It can indicate wheel-end problems that may lead to failure or fire risk. It improves tire traction. It shows the lights are working. It is only a cosmetic stain.

Question 17

What should a driver check about brake drums or rotors when visible?

Cracks, damage, or conditions that could reduce braking safety. Only whether they are painted black. Whether they are used to hold cargo. Whether they replace air tanks.

Question 18

What is the safest response if the service brake pedal feels abnormal during a brake check?

Do not operate the vehicle until the brake problem is identified and corrected. Drive at night when traffic is lighter. Use only the parking brake on the road. Pump the pedal once and ignore the issue.

Question 19

Why should steering wheel play be checked before driving?

Excessive play can indicate steering defects and reduce control. It determines fuel level. It makes the wipers faster. It only affects seat comfort.

Question 20

What should be checked on suspension hangers and mounts?

Cracks, missing parts, looseness, or damage that could affect support and control. Only whether they are clean. Whether they control the radio. Whether they replace the tires.

Study before retesting

Review before you try again.

Pre-Trip Inspection study guide Read the key topics, official references, and explanations behind this practice set. CDL practice home Return to CDL topics, state pages, and practice tests.