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Illinois CDL Combination Test 2
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Question
1
of 20
QUESTION 1 / 20
Trailers built before 1975 are:
Choose one answer below.
A
Required to have spring brakes.
✓
B
Not required to have spring brakes.
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C
Unsafe to drive.
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D
Prohibited from public roadways.
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QUESTION 2 / 20
If your trailer begins to drift off course while you are backing, you should:
Choose one answer below.
A
Continue trying to back up without stopping.
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B
Turn the top of your steering wheel in the direction of the drift.
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C
Turn the top of the steering wheel in the direction opposite of the drift.
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D
Return the steering wheel to the 12 o’clock position.
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QUESTION 3 / 20
When driving a bobtail tractor, you should be aware that:
Choose one answer below.
A
Bobtails stop very easily.
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B
Bobtails cannot drive as fast as tractors with semitrailers.
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C
Bobtails are more difficult to stop than tractors with semitrailers.
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D
Bobtails are illegal in most states.
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QUESTION 4 / 20
What is a bobtail?
Choose one answer below.
A
A tractor without a semi-trailer
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B
A tractor with two semi-trailers
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C
A tractor that goes faster than the speed limit
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D
A tractor that goes slower than the speed limit
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QUESTION 5 / 20
To lower the risk of a rollover, you should:
Choose one answer below.
A
Load the cargo as far forward as possible.
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B
Load the cargo as far back as possible.
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C
Load the cargo as low as possible.
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D
Stack the cargo as high as possible.
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QUESTION 6 / 20
What does the trailer air supply control look like?
Choose one answer below.
A
It is a square blue knob.
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B
It is a triangular yellow knob.
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C
It is an eight-sided red knob.
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D
It is a circular orange knob.
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QUESTION 7 / 20
Before a drive, ensure that air flows to all trailers by:
Choose one answer below.
A
Opening the rear shut-off valves and listening for escaping air.
✓
B
Closing the rear shut-off valves and listening for escaping air.
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C
Disconnecting air supply lines and listening for escaping air.
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D
Rolling each trailer down a hill and testing the brakes.
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QUESTION 8 / 20
What is off-tracking?
Choose one answer below.
A
When a vehicle’s front wheels follow a different path than its rear wheels
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B
When a vehicle's wheels all follow the exact same path
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C
When a load shifts during a turn
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D
When a vehicle's wheels run over a curb during a turn
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QUESTION 9 / 20
While inspecting a coupling, you should go under the trailer and:
Choose one answer below.
A
Detach the jaws from around the kingpin.
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B
Make sure the locking lever is in the "emergency" position.
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C
Remove the safety latch.
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D
Look into the back of the fifth wheel.
✓
QUESTION 10 / 20
When entering or crossing traffic while driving a combination vehicle, it is especially important that you:
Choose one answer below.
A
Sound your horn.
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B
Make sure there is a large enough gap for your vehicle.
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C
Expect other drivers to make room for your vehicle.
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D
Let other drivers wave you into their lane.
✓
QUESTION 11 / 20
When lightly loaded, combination vehicles:
Choose one answer below.
A
Should not be driven.
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B
Have reduced braking capabilities.
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C
Will not rollover.
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D
Should be loaded with most of the weight in the rear of the trailer.
✓
QUESTION 12 / 20
When driving a trailer with ABS, you should:
Choose one answer below.
A
Not depress the brakes as much as you would when driving a vehicle without ABS.
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B
Use extra braking force to ensure the ABS kicks in.
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C
Brake as you would when driving a vehicle without ABS.
✓
D
Try to not brakes as often as you would when driving a vehicle without ABS.
✓
QUESTION 13 / 20
An air supply control lever should be in its "normal" position when you are:
Choose one answer below.
A
Changing a tire.
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B
Applying the trailer emergency brakes.
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C
Pulling a trailer.
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D
Using your spring brakes.
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QUESTION 14 / 20
An air supply control in its "emergency" position will:
Choose one answer below.
A
Turn on the air supply.
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B
Apply the trailer emergency brakes.
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C
Prevent a skid.
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D
Accelerate the vehicle.
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QUESTION 15 / 20
Having ABS on only one axle:
Choose one answer below.
A
Does not change braking in any way.
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B
Is not possible.
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C
Will allow the driver additional control over their vehicle when braking.
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D
Will cause extra strain on the other axles.
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QUESTION 16 / 20
To prevent a rollover, a driver should:
Choose one answer below.
A
Keep cargo low.
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B
Place cargo high.
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C
Keep cargo loose.
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D
Turn quickly.
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QUESTION 17 / 20
If a trailer begins to skid, the driver should:
Choose one answer below.
A
Lock the brakes.
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B
Release the brakes.
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C
Steer in the opposite direction.
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D
Accelerate.
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QUESTION 18 / 20
Simply changing lanes can cause:
Choose one answer below.
A
A “crack-the-whip” effect, resulting in a rollover.
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B
A trailer to straighten out.
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C
Confusion over which lane the driver is hoping to use.
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D
Other drivers to reduce their speed.
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QUESTION 19 / 20
If a trailer is too high:
Choose one answer below.
A
It will not make a difference when coupling.
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B
It may not couple correctly.
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C
Coupling will be more secure.
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D
Coupling will be easier.
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QUESTION 20 / 20
After coupling, there should be ____ between the upper and lower fifth wheel.
Choose one answer below.
A
No space
✓
B
Very little space
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C
A lot of space
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D
Three inches of space
✓
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