Start FREE CDL Combination Vehicle Maryland (MD) Test #1 2016 Now:
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Test 1 of 2. Use this drivers ed to practice your CDL Combination Vehicle knowledge. Take this FREE CDL MARYLAND (MD) Practice test and increase your chances to pass the CDL written exam on the first try! This test is a great FREE CDL Training tool. Let’s Start!
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Where should the tractor be when you inspect landing gear after uncoupling the trailer?
While driving behind other vehicle under good condition you should allow at least one second between you vehicle and the vehicle ahead for each ____ (how many) feet of your vehicle length?
There are two thongs a driver can do to prevent a rollover.1. Keep the cargo as close to the ground as possible; 2. :
The air brake leakage rate for a combination vehicle (engine off, brakes off) should be lea than ___ psi per minute
The safest way to make turn without another traffic lane is:
The higher the center of gravity of your truck, the
What will happen right the way if the service line comes apart while you are driving a combination vehicle but the emergency line stays together?
Glad hands are usually connecting which of these?
What will happen if a driver crosses the air lines when hiking up to an old trailer?
The hang valve should be used:
When driving a set of doubles it is necessary to close which shut-off valve in the last trailer
What will happen right the way if the service line comes apart while you are driving a combination vehicle nut the emergency line stays together?
You are about to back your tractor under a semitrailer. The trailer is at the right height when the:
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
What should you do if the brakes are not released when you pushed the trailer air supply valve?
Air brake equipped trailers made before 1975:
There are two things that a driver can do to prevent a rollover. 1.: go slow around turns; and 2.:
What should you do after connecting the air lines but before backing under the trailer?
Which part of the kingpin should the locking jaws close around?
How much space should be allowed between upper and lower fifth wheel after coupling?
You have pushed the trailer air supply valve. You should not back a tractor under a trailer until the whole air system is:
You are coupling tractor to a semitrailer. You have connected the airlines. Before backing under the trailer you should:
You are coupling a tractor to semitrailer and have backed up but are not under it. What should you hook up before backing under?
Tractor with ___ trailer requires the shortest amount of stopping distance
There are two things that a driver can do to prevent a rollover. First is to keep the cargo as close to the ground as possible; and the second is to:
After you have coupled the trailer you should have to raise the landing gear by using:
You supply air to the trailer tanks by:
Why should you be sure that the fifth wheel plate is greased s required?
Your emergency air line breaks or get pulled while you are driving. The loss of pressure will cause the:
When connecting the glad hands press the two seals with the coupler together at what degree to each other?
Which of the statements is true?
Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
When backing a tractor under a trailer you should:
After the trailer has been coupled to the tractor, the tractor protection control valve should be placed in what position?
What does it mean when the fifth wheel locking lever is not locked after the jaws close around the kingpin?