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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 looking at your cargo covers in the mirrors while driving, you must be aware that a flapping cover:
keeps the cargo cool.
helps keep the cargo as close to the ground as possible.
can tear loose, uncovering the cargo.
means that the cargo is balanced.
2. To test the service brake:
shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
gently try to pull forward with the trailer parking brake on, then release the brake.
push the brake pedal firmly while going about 5 mph.
push the brake pedal firmly while slowly moving backward.
3. If you cannot make a right turn without entering another traffic lane, you should:
turn wide as you complete the turn.
watch out for vehicles coming toward you and back up for them.
swing wide to the left before starting the turn.
turn wide before you start the turn.
4. When you have to back, you should always try to back toward the driver's side. Why?
You can see better and watch the rear of your vehicle by looking out the side window.
You can watch the front of your vehicle by looking out the side window.
Backing toward the left side is more dangerous.
All of the above.
5. Empty trucks:
require the same stopping distance than full trucks.
require a greater stopping distance than full trucks.
require a shorter stopping distance than full trucks.
None of the above.
6. Most heavy vehicles require ________ change gears.
single clutching
triple shifting
double shifting
double clutching
7. The tire load rating is stated:
on each axle.
on the dashboard.
on the side of each tire.
inside the suspension system.
8. If your vehicle is equipped with air brakes, loss of air pressure in the emergency line causes:
the trailer emergency brakes to come on.
the speed of your vehicle to increase.
the trailer spring brakes to come on.
All of the above.
9. The proper following distance for a 60-foot vehicle traveling at 50 mph is:
7 seconds
4 seconds
8 seconds
6 seconds
10. When driving with cargo, you should re-check the cargo and securing devices as often as necessary to keep the load secure, and inspect again:
every 6 hours or 300 miles.
every 3 hours or 150 miles.
every day.
every 30 minutes or 50 miles.
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MD Combination Test

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