DMV CDL Tests

Vehicle Inspection

Why is a complete pre-trip inspection important before operating a commercial vehicle?

AIt can reveal safety defects before they cause trouble on the road.

BIt guarantees the vehicle will not break down.

CIt replaces all required inspections during the trip.

DIt is needed only when carrying hazardous materials.

Vehicle Inspection

During a trip, which items should a driver continue to monitor for safe operation?

AOnly the fuel gauge.

BThe vehicle's instruments, tires, cargo, lights, and other safety-critical systems.

COnly the exterior paint and body panels.

DOnly the radio and climate controls.

Tires

What minimum tread depth is required on the front tires of a commercial motor vehicle?

A1/32 inch.

B2/32 inch.

C4/32 inch.

D6/32 inch.

Tires

What minimum tread depth is generally required on tires other than the front tires of a commercial vehicle?

A1/32 inch.

B4/32 inch.

C8/32 inch.

D2/32 inch.

Tires

During an inspection of dual tires, what condition is unsafe?

AThe dual tires are touching each other.

BThe tires are the same general size.

CBoth valve stems are accessible.

DThe tires have adequate tread depth.

Steering

Which steering-system finding should be treated as a serious safety defect?

AA clean steering wheel.

BLoose, missing, bent, or damaged steering parts.

CA properly secured steering column.

DNormal steering response.

Wheels and Rims

Which wheel or rim condition requires corrective action before safe operation?

AA manufacturer identification mark.

BNormal road dust.

CCracks, broken parts, or missing fasteners.

DA properly seated tire bead.

Suspension

Which suspension condition is unsafe?

AProperly mounted shock absorbers.

BIntact spring hangers.

CNormal suspension movement.

DA cracked, broken, or missing spring or other suspension component.

Brakes

What should a driver look for when inspecting brake drums or discs?

ACracks, damage, or contamination that could reduce braking ability.

BA shiny appearance only.

CThe vehicle manufacturer's logo.

DWhether every part is the same color.

Cargo Inspection

Before driving, what must a driver verify about cargo and cargo-securing devices?

AThe cargo is stacked as high as possible.

BThe cargo is balanced and secured so it cannot shift or fall.

COnly the shipper has checked it.

DThe cargo can move slightly in turns.

You must answer every question on this page before continuing.

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Alabama CDL General Knowledge Practice Test 1

Page 1 — 10 practice questions

Instructions

Quick snapshot

Why is a complete pre-trip inspection important before operating a commercial vehicle?

During a trip, which items should a driver continue to monitor for safe operation?

What minimum tread depth is required on the front tires of a commercial motor vehicle?

What minimum tread depth is generally required on tires other than the front tires of a commercial vehicle?

During an inspection of dual tires, what condition is unsafe?

Which steering-system finding should be treated as a serious safety defect?

Which wheel or rim condition requires corrective action before safe operation?

Which suspension condition is unsafe?

What should a driver look for when inspecting brake drums or discs?

Before driving, what must a driver verify about cargo and cargo-securing devices?