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 or four possible answer choices. Test questions come from the State of Delaware Commercial Driver License 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. If unsure if a road is becoming icy, a driver can:

Guess.

Open the window and check the front of the mirror for ice.

Try to look at the road closely.

Look at a weather forecast.

If you think the road surface may be becoming icy, you can check for ice on your vehicle by opening the window and feeling the front of the side mirror, mirror support, or antenna. If ice has formed on any of these items, the road is likely becoming icy as well.

2. If being tailgated, you should:

Increase your speed.

Increase the amount of space between your vehicle and the vehicle in front of you.

Make quick movements.

If you are being tailgated, you should increase the distance between your vehicle and the vehicle ahead of you. This reduces the need for you to make sudden changes in speed or direction while making it easier for the tailgater to pass your vehicle.

3. Most heavy trucks with manual transmissions require ____ to change gears.

Single clutching

Double clutching

Triple clutching

Most heavy vehicles with manual transmissions require double clutching to shift gears. Learning to effectively change gears by double clutching takes practice.

4. When conducting a vehicle inspection, you must show each of the following, except:

That the oil pressure gauge is working.

That the oil pressure warning light turns off, or that the gauge shows increasing or normal oil pressure.

That the oil temperature gauge, if equipped, rises to the normal operating range.

That the oil pressure gauge comes on when brakes are used.

When checking the oil pressure gauge as part of a vehicle inspection test, you must ensure that it is working. The gauge should show increasing or normal oil pressure, or the oil pressure warning light should turn off. If equipped with one, the oil temperature gauge should begin a gradual rise to the normal operating range.

5. Stopping distance can be affected by:

Speed.

Temperature.

Time of day.

Traffic.

Stopping distance is affected by a vehicle's speed. The faster you are driving, the longer your stopping distance will become.

6. In a vehicle with dual parking control valves, once air pressure is lost and the spring brakes come on:

You will be unable to move the vehicle.

A separate air tank can be used to release the spring brakes for a short period of time.

You can use the spring brakes to continue driving normally.

The air tanks will automatically refill to a safe air pressure level.

In a vehicle with dual parking control valves, there is a separate air tank that can be used to temporarily release the spring brakes if they have been activated due to low air pressure. Pushing in the proper control will release the spring brakes for a short period of time, allowing the driver to move the vehicle in an emergency.

7. When crossing railroad tracks, you should:

Stop on the tracks.

Change gears.

Try to pass.

Stay in your lane.

When crossing railroad tracks during the on-road driving skills test, you must not stop, switch gears, pass another vehicle, or change lanes while any part of your vehicle is in the crossing.

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