Take West Virginia CDL Combination Test 2

West Virginia CDL Combination Test 2Practice mode

Question 1 of 20

QUESTION 1 / 20

During a trip, which shut-off valves should be open?

Choose one answer below.

AAll shut-off valves should be open.✓BThe rear shut-off valves should be open.✓CAll shut-off valves should be in the open position, except the rear shut-off valves.✓DNo shut-off valves should be open.✓

0 of 20 answered

During a trip, which shut-off valves should be open?

Failure to keep the fifth wheel plate properly greased could:

While inspecting a coupling, you should go under the trailer and:

Pull out the trailer air supply control to test:

Look for matching colors when coupling glad hands. Service lines are often:

Trailers manufactured after ____ must be equipped with Anti-Lock Braking Systems (ABS).

The emergency air line:

The best way to recognize that your trailer has begun to skid is by:

____ are the cause of more than half of all accident-related truck driver deaths.

If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:

An air supply control in its "emergency" position will:

When driving a tractor-trailer equipped with ABS, you should:

In a double or triple combination:

What is a bobtail?

When driving a bobtail tractor, you should be aware that:

If unsure if a trailer is equipped with ABS, you can:

To prevent a trailer from rolling over, you should:

If colors are being used to distinguish glad hands, which color is used for service lines?

What is another name for the service line?

What can the “crack-the-whip” effect do?