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Connecticut CDL Combination Vehicles Permit Practice Test
Practice mode
Question
1
of 10
QUESTION 1 / 10
What should you do after connecting the air lines but before backing under the trailer?
Choose one answer below.
A
Test trailer lights
✓
B
Supply air to the trailer system
✓
C
Check the trailer weight
✓
D
Perform a visual inspection of the trailer
✓
QUESTION 2 / 10
Under what conditions is it acceptable to use the jake brake?
Choose one answer below.
A
In residential areas only
✓
B
In areas where it is not prohibited and conditions allow
✓
C
During daytime driving only
✓
D
In bad weather conditions to enhance control
✓
QUESTION 3 / 10
What is often missing in air brake equipped trailers made before 1975?
Choose one answer below.
A
Air pressure gauges
✓
B
Spring brakes
✓
C
Emergency lines
✓
D
ABS systems
✓
QUESTION 4 / 10
What should you do if you notice air leaks while inspecting a combination vehicle?
Choose one answer below.
A
Ignore them if they are small
✓
B
Report the leaks for immediate repairs
✓
C
Use duct tape to seal the leaks
✓
D
Continue driving if the vehicle seems fine
✓
QUESTION 5 / 10
What should you ensure before backing a tractor under a trailer after pushing the trailer air supply valve?
Choose one answer below.
A
The air system is at normal pressure
✓
B
The service line is secure
✓
C
The parking brakes are released
✓
D
The trailer is level
✓
QUESTION 6 / 10
What is the effect of using the jake brake in prohibited areas?
Choose one answer below.
A
It can improve vehicle stability
✓
B
It can result in a fine or citation
✓
C
There are no penalties for the driver
✓
D
It increases the efficiency of the braking process
✓
QUESTION 7 / 10
What could be a result of inadequate brake adjustment?
Choose one answer below.
A
Increased effectiveness of braking
✓
B
Excessive wear on tires
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C
Improved stopping distance
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D
Potential brake failure
✓
QUESTION 8 / 10
What should you check before backing under a trailer after coupling a tractor?
Choose one answer below.
A
The emergency and service air lines
✓
B
The fifth wheel plate for grease
✓
C
The trailer's load for stability
✓
D
The position of the handbrake
✓
QUESTION 9 / 10
What is the primary purpose of low air pressure warning devices?
Choose one answer below.
A
To indicate air pressure levels above safe limits
✓
B
To provide alerts when air pressure is critically low
✓
C
To assist in normal driving operations
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D
To notify when the brakes are overheating
✓
QUESTION 10 / 10
How much space should be allowed between the upper and lower fifth wheel after coupling?
Choose one answer below.
A
One inch
✓
B
Half an inch
✓
C
No space
✓
D
Quarter inch
✓
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