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4.6

Quiz

1/10
CDL Combination Vehicles
If the safety relief valve in the air brake system releases air:
Select the answer
1 correct answer
A.
something is wrong.
B.
this will supply more power to the brakes.
C.
the valve is fully operational.

Quiz

2/10
CDL Combination Vehicles
When driving a 50 foot combination vehicle at 50 mph in ideal conditions, you should keep at least ____ seconds of space in front of you.
Select the answer
1 correct answer
A.
10
B.
5
C.
6

Quiz

3/10
CDL Combination Vehicles
When you turn suddenly while pulling doubles, which trailer is most likely to turn over?
Select the answer
1 correct answer
A.
The rear trailer is twice as likely to turn over as the tractor.
B.
All trailers are equally likely to turn over.
C.
The front trailer is twice as likely to turn over as the tractor.

Quiz

4/10
CDL Combination Vehicles
When backing, as soon as you see the trailer getting off the proper path, you should:
Select the answer
1 correct answer
A.
turn the top of the steering wheel in the opposite direction of the drift.
B.
turn the top of the steering wheel in the direction of the drift.
C.
to keep a firm grip on the steering wheel and continue backing.

Quiz

5/10
CDL Combination Vehicles
To test the service brake:
Select the answer
1 correct answer
A.
gently try to pull forward with the trailer parking brake on, then release the brake.
B.
shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
C.
push the brake pedal firmly while going about 5 mph.

Quiz

6/10
CDL Combination Vehicles
If you cannot make a right turn without entering another traffic lane, you should:
Select the answer
1 correct answer
A.
turn wide as you complete the turn.
B.
turn wide before you start the turn.
C.
swing wide to the left before starting the turn.

Quiz

7/10
CDL Combination Vehicles
Cargo tie-downs are used to:
Select the answer
1 correct answer
A.
prevent freezing.
B.
prevent right-turn accidents.
C.
keep cargo from shifting or falling.

Quiz

8/10
CDL Combination Vehicles
When driving on slippery roads, you should NOT:
Select the answer
1 correct answer
A.
use the engine brake.
B.
try to anticipate stops early.
C.
go slowly.

Quiz

9/10
CDL Combination Vehicles
If the drive wheels begin to spin when accelerating, you should:
Select the answer
1 correct answer
A.
continue to accelerate.
B.
take your foot off the accelerator.
C.
brake gently.

Quiz

10/10
CDL Combination Vehicles
You are coupling a semi-trailer to your tractor but have not yet backed under. The trailer is at the right height when:
Select the answer
1 correct answer
A.
the locking jaws are around the head of the kingpin.
B.
it will be raised slightly when the tractor is backed under it.
C.
the end of the kingpin is even with the top of the fifth wheel.
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  • Quiz name:Alabama - Class X Endorsements
  • Total number of questions:340
  • Number of questions for the test:50
  • Pass score:80%
  • Number of topics:1 Topics
Study topics:Number of questions:
  • CDL Combination Vehicles:340 Questions

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