Combination Test - Texas CDL
In coupling, just before the tractor is coupled with the trailer you should: - ✔✔connect the emergency and service air lines.
In coupling, you should not move the tractor after it is co
...
Combination Test - Texas CDL
In coupling, just before the tractor is coupled with the trailer you should: - ✔✔connect the emergency and service air lines.
In coupling, you should not move the tractor after it is coupled until you push in the air supply knob and: - ✔✔wait until the air pressure is normal.
What happens immediately if the service air line comes apart while driving, but the emergency line is okay? - ✔✔Nothing is likely to happen until you press the brakes.
In coupling, before you back under the trailer, how do you lock the trailer brakes? - ✔✔Pull out the yellow air supply knob.
For the coupling to be complete, the safety catch for the fifth wheel locking lever must be: - ✔✔over the locking gear.
What is the air leakage rate for a combination vehicle with the engine and brakes off? - ✔✔Less than 3 PSI per minute.
What is the maximum air leakage rate for a combination vehicle with the engine off and the brakes on? - ✔✔4 PSI per minute.
A driver crosses the air lines when hooking up to an old trailer. What will happen? - ✔✔If the trailer has no spring brakes, he or she could drive away but wouldn't have trailer brakes.
To unlock the fifth wheel, pull the release handle to the: - ✔✔open position.
When driving a set of doubles, it is necessary to close the: - ✔✔back shut-off valve in the last trailer.
You are coupling a semitrailer to your tractor but have not yet backed under. The trailer is at the right height when: - ✔✔it will be raised slightly when the tractor is backed under it.
Air and electric lines from the tractor to the trailer should be: - ✔✔secured, but with enough slack for turns.
When uncoupling a trailer, after you have shut off the trailer air supply and locked the trailer brakes, you should: - ✔✔back up gently to ease pressure on the fifth wheel locking jaws.
[Show More]