Combination 6

Front

If you’re glad hands on your tractor are not color-coded, how can you determine which one is the emergency line?

Back

Push in your trailer supply knob and listen for the sound of air escaping from the glad hand to find out which one is the emergency line.

Front

In normal driving, some drivers apply the hand valve before using the brake pedal to prevent a jack knife. Which of these statements is true? It should not be done, It results in less skidding than using the brake pedal alone, It is the best way to brake and keep the truck in a straight line, It should only be done on wet surfaces

Back

It should not be done

Front

In order to inspect a coupling you should:

Back

Use a flashlight if necessary

Front

In order to supply air to the trailer, you must first: Push in the tractor protection valve, Pull out the trailer air supply, Stop the engine so you can hear the brakes, Cross the airline so that you can check for leaks

Back

Push in the tractor protection valve

Front

It takes tractors without trailers longer to stop than tractor trailer combinations loaded a maximum gross weight.

Back

True

Front

More than half of truck driver deaths are due to rollovers.

Back

True

Front

Which of the following vehicles off-track (cheating) the most?
- Tractor towing a 45-foot trailer
- Bobtail tractor
- City bus
- Tractor with two 27 foot trailers

Back

Tractor with two 27 foot trailers

Front

One reason for driving slowly around corners when loaded is:

Back

To prevent rollovers

Front

Shut-off valves can be found at the front and back of the trailers.

Back

False

Front

The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that:

Back

The coupling is not right and should be fixed before driving the coupled unit