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DMV PRACTICE
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Commercial Driver License (CDL) Class B Practice Test
Practice mode
Question
1
of 25
QUESTION 1 / 25
Should you let air out of hot tires to return them to normal pressure?
Choose one answer below.
A
Yes, it helps to cool them down
✓
B
No, it will be too low when they cool off
✓
C
Only if the tire is extremely hot
✓
D
It's acceptable if the vehicle is stationary
✓
QUESTION 2 / 25
Why should you back toward the driver's side?
Choose one answer below.
A
Better visibility
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B
Shorter distance
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C
Safer maneuvering
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D
Less traffic distraction
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QUESTION 3 / 25
When backing, why is it important to use a helper?
Choose one answer below.
A
To conserve fuel
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B
There are blind spots you won't be able to see
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C
To speed up the process
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D
To reduce stress
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QUESTION 4 / 25
Which of the following is NOT a tip to avoid becoming a distracted driver?
Choose one answer below.
A
Review safety features of in-vehicle electronics before driving
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B
Pre-program radio stations before starting your trip
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C
Engage in complex conversations with passengers
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D
Adjust mirrors for best visibility before driving
✓
QUESTION 5 / 25
In the context of safe driving, what does "communicating" mean?
Choose one answer below.
A
Using lights and signals to notify other drivers
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B
Signaling your intentions
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C
Making eye contact with other drivers
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D
Honking your horn
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QUESTION 6 / 25
Is it true that coffee and fresh air can help a person sober up?
Choose one answer below.
A
True
✓
B
False
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C
It depends on the amount of alcohol consumed
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D
Only fresh air helps
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QUESTION 7 / 25
True or False: Common medicines for colds can cause drowsiness.
Choose one answer below.
A
True
✓
B
False
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C
Only certain medications
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D
None of these
✓
QUESTION 8 / 25
What is an important feature of dollies manufactured after 1998?
Choose one answer below.
A
They have higher payload capacity
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B
They are required to have a malfunction lamp on the left side
✓
C
They are made from lighter materials
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D
They do not require maintenance
✓
QUESTION 9 / 25
What actions should you take at an accident scene to prevent further accidents?
Choose one answer below.
A
Leave the scene immediately
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B
Protect the area, notify authorities, and care for the injured
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C
Only notify the authorities
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D
Take pictures and leave
✓
QUESTION 10 / 25
What should you do if your air pressure gauge indicates low pressure while driving?
Choose one answer below.
A
Continue driving and check later
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B
Pull over and examine the air system
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C
Increase your speed to compensate
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D
Ignore it unless the brakes feel different
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QUESTION 11 / 25
What type of maintenance checks can prevent suspension system issues?
Choose one answer below.
A
Regular tire rotation
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B
Periodic inspections for cracks and leaks
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C
Checking fluid levels weekly
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D
Polishing the vehicle exterior
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QUESTION 12 / 25
All vehicles with air brakes must have a low air pressure warning signal. True or False?
Choose one answer below.
A
True
✓
B
False
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C
Only for commercial vehicles
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D
Only for new models
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QUESTION 13 / 25
Which of the following is a consequence of ignoring fatigue while driving?
Choose one answer below.
A
Increased alertness and focus
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B
Higher risk of accidents
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C
Improved reaction times
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D
No impact on driving performance
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QUESTION 14 / 25
What is a common misconception about fire extinguishers?
Choose one answer below.
A
They can be used on any type of fire
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B
All fire extinguishers are the same
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C
They should be used from a distance
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D
They can only be used if the fire is small
✓
QUESTION 15 / 25
What does the acronym "DOT" stand for?
Choose one answer below.
A
Department of Transportation
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B
Drivers On Track
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C
Department of Transport
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D
Driving Operator Training
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QUESTION 16 / 25
How do antilock brakes assist drivers?
Choose one answer below.
A
They stop the vehicle faster
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B
They help avoid wheel lock-up and maintain control
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C
They increase fuel efficiency
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D
They make it easier to reverse
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QUESTION 17 / 25
How often must CDL holders undergo a medical examination?
Choose one answer below.
A
Every year
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B
Every six months
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C
Every two years
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D
Every three years
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QUESTION 18 / 25
What are the minimum age requirements to obtain a Class B CDL for intrastate driving?
Choose one answer below.
A
16 years old
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B
18 years old
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C
21 years old
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D
25 years old
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QUESTION 19 / 25
What is the potential impact of poor road conditions on braking distance?
Choose one answer below.
A
No impact, as brakes function the same under all conditions
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B
Increased braking distance and difficulty stopping
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C
Decreased braking distance due to better grip
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D
Braking distance is irrelevant
✓
QUESTION 20 / 25
What is the recommended following distance for a truck that is 40 feet long at a speed of 45 MPH?
Choose one answer below.
A
Six seconds
✓
B
Four seconds
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C
Five seconds
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D
Seven seconds
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QUESTION 21 / 25
What factors should be considered for selecting a safe speed down a downgrade?
Choose one answer below.
A
Engine temperature and tire pressure
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B
Total weight, length and steepness of grade, and weather
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C
Vehicle model and driver experience
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D
The presence of other vehicles on the road
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QUESTION 22 / 25
What's the process for testing the low pressure warning signal?
Choose one answer below.
A
Shut off the engine and decrease air tank pressure
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B
Check the connection of electrical wires
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C
Use a pressure gauge to measure the air tank
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D
Remove the brake pedal and test the signal
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QUESTION 23 / 25
How can you identify if your vehicle is equipped with antilock brakes?
Choose one answer below.
A
If it was manufactured on or after March 1, 1998
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B
If it has a dual air brake system
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C
If it has a visible antilock system indicator
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D
If it is a combination vehicle only
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QUESTION 24 / 25
How can you identify whether your vehicle has antilock brakes?
Choose one answer below.
A
By the size of the tires
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B
They will have yellow malfunction lamps on the instrument panels
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C
By the weight of the vehicle
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D
By the color of the brake fluid
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QUESTION 25 / 25
What is the best way to approach a tire blowout situation?
Choose one answer below.
A
Accelerate to regain control
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B
Gently steer and do not brake hard
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C
Immediately pull over
✓
D
Keep driving until you reach a safe place
✓
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