Combination Vehicle

Question 1

Bob tailing means:

Answer 1

No trailer attached

Question 2

The ONLY time you should use the hand valve (brake) is to

Answer 2

Test E- brakes

Question 3

Glad hands are hooked together or to dummy couplers to…

Answer 3

Avoid water & dirt out of airlines

Question 4

ABS is an addition to your normal breaks. There purpose is to help…

Answer 4

Avoid wheel lock up

Question 5

If you cross air lines on old trailer W/O SPRING BRAKES. You WILL NOT have use of trailer brakes TRUE or FALSE?

Answer 5

True

Question 6

If Damage or breakage to Emergency or service air lines occurs. What will happen?

Answer 6

• Tractor Protection Valve will close

- Trailer brakes will engage

Question 7

5th wheel must be greased to prevent …

Answer 7

Steering issues

Question 8

The trailer brakes MUST ALWAYS be _______ & ______ before backing under it to couple.

Answer 8

Chocked & locked

Question 9

When coupling & un-coupling ALWAYS use these for safety!

Answer 9

Chock blocks

Question 10

You know the trailer is at the correct height when backing under it because .

Answer 10

It’s raised slightly to relieve pressure off landing gear

Question 11

Before backing under the trailer.l you must set the ______ brakes

Answer 11

TRAILER brakes.

Question 12

Gently pull on the kingpin when the ____brakes are locked

Answer 12

Trailer

Question 13

Trailer brakes must be connected BEFORE or AFTER backing under the trailer?

Answer 13

Before

Question 14

If pulling more than 1 trailer ALL AIR VALVES are OPEN…. EXCEPT which trailer

Answer 14

Last trailer. Crack this valve to test air system.

Question 15

Always check the kingpin visually true or false.

Answer 15

True

Question 16

Tractor bob-tail takes longer to stop than a loaded combination vehicle T or F..

Answer 16

True

Question 17

5th wheel locking jaws or safety latch must be over the locking lever. True or false

Answer 17

True

Question 18

Trailer support OR dollies should always be raised FULLY & _____ should be secured before moving.

Answer 18

Crank handle

Question 19

There must be adequate clearance between the _____ & the ______.

Answer 19

Tractor tired & nose of trailer

Question 20

3 parts of the kingpin:

Answer 20

Head
Shank
Base

Question 21

Which part of the kingpin should the locking jaws go around

Answer 21

Shank

Question 22

One rule is important with all skids

Answer 22

restore traction

Question 23

If the emergency air line breaks while driving the loss of pressure will cause this action.

Answer 23

Emergency brakes trailer brakes to come on

Question 24

If lines are crossed the trailer brakes would ..

Answer 24

Not work!

Question 25

Trailers made before 75' don't have these kind of brakes

Answer 25

Spring brakes

Question 26

As you slow down you should 1. Monitor your tractor & trailer 2. Back off the brakes True or false

Answer 26

True

Question 27

If you have a major leak in the SERVICE AIR LINE & put on the brakes the EMERGENCY brakes, will engage TREU or FALSE ?

Answer 27

TRUE

Question 28

After you supply air to the trailer you that the lines are Not crossed by:

Answer 28

Also lying & releasing trailer brakes & listening for Audible leaks.

Question 29

You supply air to the air tank on the TRAILER by?

Answer 29

Pushing the RED trailer supply valve (TSV)

Question 30

Safety catch for the 5th wheel locking lever MUST BE over the locking lever

Answer 30

True or False

Question 31

Relay valve allows the device brake to be applied more quickly TRUE OR FALSE

Answer 31

True

Question 32

When trailer support (landing gear) is up & trailer is resting on the tractor make sure:

Answer 32

1. There's enough clearance between tractor tired & nose of the trailer. 2. Tractor frame & the landing gear.

Question 33

You pushed the trailer air supply valve. DO NOT move the tractor until the psi is at____

Answer 33

100-125 psi

Question 34

TRACTOR PROTECTION VALVE is an in can valve that keeps air supply to the tractor should the TRAILER brake away or leak. TRUE or FALSE

Answer 34

True

Question 35

What kind of trailer is most likely to hang up on railroads.

Answer 35

Low-boy trailer

Question 36

Yellow test light in the cab indicates:

Answer 36

Trailer has ABS