E
.
Learndmv
DMV PRACTICE
Toggle navigation
Find your state
Exam types
Practice tests
Sign in
Create account
↗
← Leave quiz
Texas CDL Combination Test 2
Practice mode
Question
1
of 20
QUESTION 1 / 20
What is a tractor protection valve?
Choose one answer below.
A
A valve to keep air in the brake system should there be a bad leak
✓
B
A valve that prevents the truck from being stolen
✓
C
A valve that prevents the driver from going too fast
✓
D
A valve that prevents the trailer from accidentally being released
✓
QUESTION 2 / 20
To help prevent rollovers, you should:
Choose one answer below.
A
Accelerate quickly after stopping.
✓
B
Drive slowly around turns.
✓
C
Keep the load near the back of the trailer.
✓
D
Keep the load on one side of the trailer.
✓
QUESTION 3 / 20
When coupling a trailer:
Choose one answer below.
A
Make sure to couple matching glad hands.
✓
B
Any glad hand can be connected to any other glad hand.
✓
C
It is best to leave one glad hand unattached.
✓
D
Only one set of glad hands should be connected.
✓
QUESTION 4 / 20
Rollovers happen when:
Choose one answer below.
A
A truck driver is driving too fast.
✓
B
The driver of a vehicle in front of a truck is moving to slowly.
✓
C
A truck driver is driving too slowly.
✓
D
ABS is working effectively.
✓
QUESTION 5 / 20
The service air line is attached to the:
Choose one answer below.
A
Relay valves.
✓
B
Supply line.
✓
C
Emergency air line.
✓
D
Steering wheel.
✓
QUESTION 6 / 20
When driving a bobtail tractor, you should be aware that:
Choose one answer below.
A
Bobtails stop very easily.
✓
B
Bobtails cannot drive as fast as tractors with semitrailers.
✓
C
Bobtails are more difficult to stop than tractors with semitrailers.
✓
D
Bobtails are illegal in most states.
✓
QUESTION 7 / 20
Large combination vehicles take the longest amount of time to stop:
Choose one answer below.
A
When fully loaded.
✓
B
When partially loaded.
✓
C
When empty.
✓
D
When mostly loaded.
✓
QUESTION 8 / 20
In a double or triple combination:
Choose one answer below.
A
Cargo weight must be evenly distributed between all trailers.
✓
B
The heaviest trailer should be positioned directly behind the cab.
✓
C
The heaviest trailer should be positioned in the rear.
✓
D
The weight of the trailers does not matter.
✓
QUESTION 9 / 20
Before backing your tractor under the trailer, make sure your trailer brakes are:
Choose one answer below.
A
Disengaged.
✓
B
Locked.
✓
C
Deactivated.
✓
D
Dry.
✓
QUESTION 10 / 20
The best way to recognize that your trailer has begun to skid is by:
Choose one answer below.
A
Seeing other drivers' faces.
✓
B
Seeing it in your mirrors.
✓
C
Feeling it.
✓
D
Listening to the radio.
✓
QUESTION 11 / 20
Having ABS on only one axle:
Choose one answer below.
A
Does not change braking in any way.
✓
B
Is not possible.
✓
C
Will allow the driver additional control over their vehicle when braking.
✓
D
Will cause extra strain on the other axles.
✓
QUESTION 12 / 20
Pull out the trailer air supply control to test:
Choose one answer below.
A
The parking brake.
✓
B
The trailer emergency brakes.
✓
C
The trailer service brakes.
✓
D
The landing gear.
✓
QUESTION 13 / 20
When backing a trailer, how should you turn the steering wheel?
Choose one answer below.
A
Turn the top of the steering wheel in the direction you want the trailer to go.
✓
B
Turn the top of the steering wheel in the direction opposite of where you want the trailer to go.
✓
C
It doesn’t matter.
✓
D
It depends on where the trailer is being backed.
✓
QUESTION 14 / 20
After finishing a pre-trip inspection, you should:
Choose one answer below.
A
Close the service line valve.
✓
B
Remove the service line valve.
✓
C
Leave the emergency line valve open.
✓
D
Leave the rear shut-off valves open.
✓
QUESTION 15 / 20
One way to prevent a rollover is to:
Choose one answer below.
A
Move cargo to the left side of the rig.
✓
B
Keep cargo centered on the rig.
✓
C
Move cargo to the right side of the rig.
✓
D
Keep cargo as far from the ground as possible.
✓
QUESTION 16 / 20
Driving a combination vehicle ____ than driving a single vehicle.
Choose one answer below.
A
Is easier
✓
B
Requires more driving skill
✓
C
Is better for training
✓
D
Is safer in inclement weather
✓
QUESTION 17 / 20
Simply changing lanes can cause:
Choose one answer below.
A
A “crack-the-whip” effect, resulting in a rollover.
✓
B
A trailer to straighten out.
✓
C
Confusion over which lane the driver is hoping to use.
✓
D
Other drivers to reduce their speed.
✓
QUESTION 18 / 20
A trailer will be most likely to swing around when:
Choose one answer below.
A
It is full.
✓
B
Traveling in a straight line.
✓
C
It is empty.
✓
D
The wheels are rotating.
✓
QUESTION 19 / 20
Proper coupling technique:
Choose one answer below.
A
Is the same on all vehicles.
✓
B
Is essential to the safe operation of a vehicle.
✓
C
Includes ensuring that the fifth wheel plate is not greased.
✓
D
Can be learned over time.
✓
QUESTION 20 / 20
When driving a tractor-trailer equipped with ABS, you should:
Choose one answer below.
A
Stop harder than you would otherwise.
✓
B
Use extra braking force to ensure the ABS kicks in.
✓
C
Brake as you normally would.
✓
D
Brake using less pressure than you would otherwise use.
✓
← Previous
0 of 20 answered
Next question →
Finish & see results →