Test 2 Combination

Question 0

2) if the service air line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?

Answer 0

Nothing is likely to happen until you try to apply the brakes

Question 1

1) after you supply air to the trailer, make sure the air lines are not crossed and the trailer brakes are working. This is done by:

Answer 1

Applying and release the trailer brakes and listening for brake sounds

Question 2

3) where should the tractor be when you inspect the landing gear after uncoupling a trailer?

Answer 2

With the tractor frame under the trailer

Question 3

4) what gear should the tractor transmission be in after you have uncoupled the trailer and are inspected the trailer supports?

Answer 3

Neutral

Question 4

5) you should not back a tractor under a trailer until the whole air system is:

Answer 4

At normal pressure

Question 5

6) which of these statements is true?

Answer 5

“Bobtail” tractors can take longer to stop than a combination vehicle loaded to maximum gross weight

Question 6

7) you are coupling a semitrailer of your tractor but have not yet backed under. The trailer is at the right height when:

Answer 6

It will be raised slightly when the tractor is backed under it

Question 7

8) when you are uncoupling a loaded trailer, you should lower the landing gear until it:

Answer 7

Makes firm contact with the ground and then crank it in low gear a few extra turns

Question 8

9) in general, the higher the “center of gravity” of your truck the:

Answer 8

Easier it is to turn over

Question 9

10) to be safe when driving behind other vehicles under good conditions, you should leave at least one second between your vehicle and the vehicle ahead for each_feet of your vehicle’s length.

Answer 9

10

Question 10

11) you are coupling a tractor to a semitrailer and have backed up but are not under it. What should you hook up before backing under?

Answer 10

The emergency and service air lines

Question 11

12) a tractor with a(n)_trailer requires the shortest amount of stopping distance.

Answer 11

Fully loaded

Question 12

13) when checking the trailer’s emergency brakes, the tractor protection control valve should be placed in the_position

Answer 12

Emergency

Question 13

14) when do you need to use chocks to park a trailer that does not have spring brakes?

Answer 13

Always

Question 14

15) you are driving a combination vehicle when the trailer brakes away, pulling apart both air lines. You would expect the trailer brakes to come on and:

Answer 14

The tractor protection valve to close