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Missouri CDL Practice Exam
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Question
1
of 10
QUESTION 1 / 10
Should you look into the back of the fifth wheel to ensure it is locked onto the kingpin?
Choose one answer below.
A
Yes, it is necessary
✓
B
No, it is not needed
✓
C
Only if you have time
✓
D
Only for long trailers
✓
QUESTION 2 / 10
What should you do if you feel drowsy while driving a commercial vehicle?
Choose one answer below.
A
Play music loudly
✓
B
Stop at a safe location and rest
✓
C
Drink caffeinated beverages
✓
D
Open the window for fresh air
✓
QUESTION 3 / 10
Are retarders effective in preventing skidding on slippery roads?
Choose one answer below.
A
Yes, they provide better traction
✓
B
No, they can increase skidding
✓
C
Yes, but only on wet surfaces
✓
D
No, they are ineffective in rain
✓
QUESTION 4 / 10
What is one sign that indicates a weight station ahead?
Choose one answer below.
A
A round green sign
✓
B
A diamond-shaped yellow sign with a truck symbol
✓
C
A rectangular blue sign
✓
D
A triangular orange sign
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QUESTION 5 / 10
How can you test that air flows to all trailers?
Choose one answer below.
A
Engage the tractor brake
✓
B
Engage the trailer brake and open valves
✓
C
Check for leaks
✓
D
Only test one trailer
✓
QUESTION 6 / 10
When backing a trailer, what is recommended for optimal positioning?
Choose one answer below.
A
Always back in a straight line
✓
B
Only back when a clear path is in sight
✓
C
Back in a curved path to the driver's side
✓
D
Position the vehicle at an angle
✓
QUESTION 7 / 10
Why should you park the vehicle in such a way that you can pull forward when leaving?
Choose one answer below.
A
It makes it easier to exit the parking spot
✓
B
It allows for quicker access to the roadway
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C
It helps avoid obstacles when reversing
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D
It prevents damage to the vehicle
✓
QUESTION 8 / 10
What is the consequence of refusing to submit to a chemical test when suspected of DUI in Missouri?
Choose one answer below.
A
Mandatory community service
✓
B
Automatic suspension of CDL
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C
A fine of up to $500
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D
Required attendance at alcohol education classes
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QUESTION 9 / 10
When is it acceptable to use your horn?
Choose one answer below.
A
To greet friends on the road
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B
To alert another driver of your presence
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C
To express frustration at slow drivers
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D
Only in emergencies
✓
QUESTION 10 / 10
What should wheel bearing seals be primarily inspected for?
Choose one answer below.
A
Cracks and rust
✓
B
Leaks
✓
C
Loose fittings
✓
D
Corrosion
✓
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