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South Carolina
South Carolina CDL Double 2
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Q.1
Submit
What kind of force must emergency brakes use?
Air pressure
Mechanical
Heavy
Electrical
Q.2
Submit
Most heavy trucks with manual transmissions require ____ to change gears.
Single clutching
Double clutching
Triple clutching
Q.3
Submit
Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:
The trailer will stop normally.
The trailer will not have brakes.
The trailer will speed up.
Q.4
Submit
When coupling, you should:
Make sure to couple the proper glad hands.
Only couple one set of glad hands.
It is best to leave one glad hand loose.
Q.5
Submit
Shaded areas of a road:
Usually don’t freeze.
Are usually blocked from all moisture, so they cannot freeze.
Will remain slick after ice has melted on other areas of the road.
Q.6
Submit
When stopping in an emergency situation, you should:
Veer your trailer to the right and stop.
Stop in a straight line.
Veer your trailer to the left and stop.
Q.7
Submit
Noting the speed of other vehicles is one way to determine when to upshift.
True
False
Q.8
Submit
Why do you need to drain air tanks regularly?
Because the air gets old and needs to be replaced
Because compressed air contains some water which must be drained from the tanks
To allow for a change in air pressure
To remove bad air from the tanks
Q.9
Submit
Which of the following is not a type of retarder?
Exhaust
Engine
Air
Electric
Q.10
Submit
Leaking shock absorbers:
Are normal.
Indicate a potentially dangerous defect.
Will prevent the turn signals from working.
Pose no threat if the vehicle is only driven on highways.
Q.11
Submit
If you are driving in fog, you should not:
Turn on the four-way flashers.
Slow down.
Use your high beam lights.
Q.12
Submit
Which of the following is not part of a vehicle’s air brake system?
Air gauges
Low pressure warning device
Air filter
Q.13
Submit
Doubles and triples:
Turn easily due to their centers of gravity.
Are more difficult to turn than smaller commercial vehicles.
Should never be turned.
Always have the right-of-way.
Q.14
Submit
Maintaining a cushion of space between your vehicle and the vehicle ahead is:
Not encouraged, as it slows the flow of traffic.
Encouraged, as it allows you time to react to unexpected hazards.
Only encouraged if you are traveling with a passenger.
Q.15
Submit
Coupling can be tested by a driver:
Placing their fingers inside the coupling mechanism.
Pulling against the pin of the second semi-trailer.
Placing glue over the fifth wheel.
Releasing the orange lever in the cab.
Q.16
Submit
To prevent a rollover, a driver should:
Keep cargo low.
Place cargo high.
Keep cargo loose.
Turn quickly.
Q.17
Submit
A CMV should:
Not have a fire extinguisher, unless transporting hazardous materials.
Not have a fire extinguisher, unless the vehicle will be traveling through remote areas.
Not have a fire extinguisher.
Have a fire extinguisher and other emergency equipment.
Q.18
Submit
Brakes out of adjustment will:
Work properly.
Cause some of the brakes to overwork and malfunction.
Allow better acceleration.
Q.19
Submit
Doubles combinations:
Are less likely to jackknife than singles.
Are less likely to roll over than singles.
Require a larger reaction time than singles.
Q.20
Submit
Air tank drains:
Allow rain water to enter air tanks.
Are used to drain water and oil from air tanks.
Should never be opened.
Must remain open while driving.
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