DC CDL COMBINATION PRACTICE TEST
11.
When you drive a tractor-trailer combination with ABS, you should:
|
always apply the brakes hard.
|
|
|
pump the brakes.
|
|
|
brake as you always have.
|
|
|
apply the trailer hand brake whe braking.
|
12.
Broken suspension parts can be very dangerous. When inspecting your vehicle for suspension system defects, look for:
|
Damaged air suspension systems.
|
|
|
Spring hangers that allow movement of axle from proper position.
|
|
|
Broken leaves in a multi-leaf spring.
|
|
|
All of the above.
|
13.
When checking the lights before driving:
|
you should turn off the engine.
|
|
|
the engine must be running.
|
|
|
make sure the parking brake is not set.
|
|
|
you should check them from inside the vehicle.
|
14.
When driving at night you should:
|
always use low beams.
|
|
|
use your high beams when it is safe and legal to do so.
|
|
|
keep the interior light on.
|
|
|
All of the above.
|
15.
Before entering a curve, you should:
|
increase your speed.
|
|
|
maintain your speed.
|
|
|
reduce your speed.
|
|
|
come to a complete stop.
|
16.
Which of the following is NOT a step in backing up with a trailer?
|
Backing quickly when the path is straight
|
|
|
Backing slowly
|
|
|
Looking at your line of travel before you begin
|
|
|
Checking the outside mirrors on both sides frequently
|
17.
The first thing to do when coupling a tractor-semitrailer is to:
|
inspect the fifth wheel.
|
|
|
position the tractor.
|
|
|
check the trailer height.
|
|
|
lock the trailer brakes.
|
18.
The proper following distance for a 60-foot vehicle traveling at 50 mph is:
|
7 seconds
|
|
|
8 seconds
|
|
|
6 seconds
|
|
|
4 seconds
|
19.
When your vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called:
|
front-rear tracking.
|
|
|
off-tracking.
|
|
|
path-breaking.
|
|
|
skidding.
|
20.
When driving a combination vehicle, which of the following 2 things will help you prevent a rollover?
|
Keeping cargo near the ground and driving slowly on the highway.
|
|
|
Keeping the cargo near the ground and driving slowly around turns.
|
|
|
Keeping cargo near the center of the vehicle and driving slowly on turns.
|
|
|
Keeping cargo near the center of the vehicle and driving slowly on the highway.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More