20 Tests

Double Triple Test Online | Delaware 2021

Train for FREE with our Delaware CDL double triple practice test online. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a DE CDL double triple license in 2021, practice as much as.. Read More

Train for FREE with our Delaware CDL double triple practice test online. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a DE CDL double triple license in 2021, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that DMV requirements may vary from state to state.

20
16
4

1 . If a truck is equipped, a trailer brake hand valve can be used to:

If a tractor-trailer is so equipped, the trailer brake hand valve can be used to stop the vehicle from rolling back when being started from a stop.

2 . To check the automatic transmission fluid level in some vehicles, you will have to:

In some vehicles, it may be necessary to leave the engine running when checking the automatic transmission fluid level.

3 . Driving a combination vehicle ____ than driving a single vehicle.

Is safer in inclement weather Driving a combination vehicle usually requires more skill than driving a single vehicle. Combination vehicles are generally longer and heavier than single commercial vehicles.

4 . When starting an engine:

After a vehicle is started, the warning lights and buzzers should go out after a few seconds. If the warning signals do not turn off, there may be something wrong with the vehicle.

5 . Before a trip, you should make a visual check of a coupling to ensure that:

When performing a visual check of coupling devices, you should make sure there is no space between the upper and lower fifth wheel. Ensure that the locking jaws are securely closed around the kingpin.

6 . Black ice is:

Black ice is a layer of ice that is thin and clear enough for the road to be visible through it. The surface will look like a wet road. Always be alert to black ice if the road looks wet when the temperature is below freezing.

7 . To test the trailer service brakes, you should:

Move the vehicle forward slowly and apply the brakes with the hand control. To test the trailer service brakes, you should first ensure that the braking system has a normal air pressure level, then release the parking brake. You should then move the vehicle forward slowly and apply the brakes with the hand control. If the trailer service brakes are working properly, you will feel the brakes activate.

Wait, before you go

Ace Your Delaware CDL Written Test with our Guaranteed Cheat Sheet