Instructions

Knowledge Test Class A

This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three possible answer choices. Test questions come from the Missouri Commercial Driver’s Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination, Doubles and Hazardous Materials. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

Number of Question 50

Passing Score 40

1. Blocking cargo:

Should never be done.

Should be done to prevent the shifting of cargo.

Can only be done with metal pieces.

Blocking and bracing are techniques to keep cargo from shifting in transit. A piece of cargo should be blocked to its front, back, and/or sides to prevent movement.

2. If you are driving at a reduced speed in a construction zone when you spot a construction worker near the road, you should:

Speed up.

Stay at your current speed.

Further reduce your speed.

Always decrease your speed when traveling through a construction area. Slow down even further if there are workers on or near the roadway.

3. If you see taillights ahead while you are driving in fog:

The lights may not indicate where the road is as the vehicle may have pulled off the roadway.

You can assume the vehicle ahead is on the road.

It may be an optical illusion.

When driving under foggy conditions, lights cannot be taken as a reliable indication of where the road is. The lights may be coming from a vehicle that has pulled off the road.

4. To make your vehicle more visible during the day, you should:

Use your low beam headlights.

Use your high beam headlights.

Use your clearance lights.

Low beam headlights should be used for best visibility, even during the day. Using high beam headlights around other drivers can be dangerous.

5. When backing a truck, you should:

Only use the side mirrors on the driver’s side.

Use both side mirrors.

Never use a helper.

Backing a commercial motor vehicle is always dangerous because you cannot see everything behind you. When backing, make frequent checks of the mirrors on both sides of the vehicle. Use a helper whenever possible.

6. When applying for a hazardous materials endorsement, being found guilty of which of the following is a disqualifying offense?

Arson

Speeding

Littering

Amongst other crimes, a felony conviction for arson will disqualify a person from obtaining, renewing, or transferring a hazardous materials endorsement.

7. When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:

Always pump the brakes several times before holding down the brake pedal.

Brake normally.

Press down the brake pedal as hard as possible every time you slow or stop.

Drivers of vehicles equipped with ABS and drivers of vehicles without ABS should brake in relatively the same manner. When ABS is working properly, it automatically applies when brakes are applied in situations that may create lockup.

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