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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Maryland CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Maryland CDL Manual. Take this practice test now to prepare for the actual MD CDL combination test!
1. When checking the lights before driving:
make sure the parking brake is not set.
the engine must be running.
you should turn off the engine.
you should check them from inside the vehicle.
2. Glad hands are used to:
connect the service and emergency air lines from the truck or tractor to the trailer.
connect the brakes from the truck or tractor to the trailer.
connect the electrical lines from the truck or tractor to the trailer.
the air compressor is connected to the engine.
3. If your vehicle thumps or vibrates heavily, it may be a sign that:
the brakes have failed.
you need to shift up.
one of the tires has gone flat.
the engine belt is loose.
4. Before entering an intersection, make sure that:
there's enough room to get at least halfway across.
accelerate smoothly and change gears as necessary.
That there is enough room for the rear of your vehicle to clear the stop line on your side.
there is sufficient space to clear it.
5. If you are feeling sleepy, you should:
pull off the road and rest or take a nap.
slow down and drive on the shoulder of the road.
increase your speed to get to the destination quicker.
None of the above.
6. If a load is 10 feet long, the minimum number of tie-downs required is:
7. How do you find out how many seconds of following distance you have?
Pass a stationary object and count how many seconds it takes the vehicle ahead of you to reach the same spot.
Wait until the vehicle ahead of you passes a pavement marking, shadow or landmark. Then count off the seconds until you reach the same spot.
Wait until the vehicle ahead of you passes a pavement marking or some other clear landmark, then use the stopwatch on your mobile phone to see how long it takes you to reach the same spot.
None of the above.
8. Combination vehicles _________ than single CMVs.
are safer in bad weather
are much easier to drive
require more driving skill
All of the above.
9. A red triangle with an orange center means:
Slow-moving vehicle
The vehicle is hauling hazardous materials
Law enforcement vehicle
Liquid tanker
10. When connecting the glad hands, you should press the two seals together with the couplers at a ______ angle to each other.
90 degree
45 degree
30 degree
180 degree
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MD CDL Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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