2026 Florida DMV Combination Class A Test 1 (20 Questions And Complete Answers)
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If oil and water build up in your vehicle's air tanks, the brakes:
1. May not work correctly.
2. May feel squishy.
3. Will squeal loudly when used.
4. Will be extremely sensitive.
1. May not work correctly.
2. May feel squishy.
3. Will squeal loudly when used.
4. Will be extremely sensitive.
May not work correctly.
Failure to keep the fifth wheel plate properly greased could:
1. Cause the trailer to disconnect.
2. Cause steering problems.
3. Cause braking problems.
4. Affect the lights.
1. Cause the trailer to disconnect.
2. Cause steering problems.
3. Cause braking problems.
4. Affect the lights.
Cause steering problems.
Pull out the trailer air supply control to test:
1. The parking brake.
2. The trailer emergency brakes.
3. The trailer service brakes.
4. The landing gear.
1. The parking brake.
2. The trailer emergency brakes.
3. The trailer service brakes.
4. The landing gear.
The trailer emergency brakes.
Rollovers are most likely to happen when:
1. Drivers turn too fast.
2. Driver turn too slowly.
3. It is windy.
4. It is raining.
1. Drivers turn too fast.
2. Driver turn too slowly.
3. It is windy.
4. It is raining.
Drivers turn too fast.
A loss of air pressure in the emergency line will cause:
1. The suspension springs to extend.
2. The tractor protection valve to open.
3. The rear trailer to detach from the combination.
4. The emergency brakes to activate.
1. The suspension springs to extend.
2. The tractor protection valve to open.
3. The rear trailer to detach from the combination.
4. The emergency brakes to activate.
The emergency brakes to activate.
Before a drive, ensure that air flows to all trailers by:
1. Opening the rear shut-off valves and listening for escaping air.
2. Closing the rear shut-off valves and listening for escaping air.
3. Disconnecting air supply lines and listening for escaping air.
4. Rolling each trailer down a hill and testing the brakes.
1. Opening the rear shut-off valves and listening for escaping air.
2. Closing the rear shut-off valves and listening for escaping air.
3. Disconnecting air supply lines and listening for escaping air.
4. Rolling each trailer down a hill and testing the brakes.
Opening the rear shut-off valves and listening for escaping air.
Starting in which year were newly manufactured trailers required to have ABS?
1. 1972
2. 1987
3. 1998
4. 2004
1. 1972
2. 1987
3. 1998
4. 2004
1998
While inspecting a coupling, you should go under the trailer and:
1. Detach the jaws from around the kingpin.
2. Make sure the locking lever is in the "emergency" position.
3. Remove the safety latch.
4. Look into the back of the fifth wheel.
1. Detach the jaws from around the kingpin.
2. Make sure the locking lever is in the "emergency" position.
3. Remove the safety latch.
4. Look into the back of the fifth wheel.
Look into the back of the fifth wheel.
Before backing your tractor under the trailer, make sure your trailer brakes are:
1. Disengaged.
2. Locked.
3. Deactivated.
4. Dry.
1. Disengaged.
2. Locked.
3. Deactivated.
4. Dry.
Locked.
When connecting a converter dolly to a second or third trailer, the trailer height should be:
1. Slightly higher than the center of the fifth wheel.
2. Level with the center of the fifth wheel.
3. Next to the center of the fifth wheel.
4. Slightly lower than the center of the fifth wheel.
1. Slightly higher than the center of the fifth wheel.
2. Level with the center of the fifth wheel.
3. Next to the center of the fifth wheel.
4. Slightly lower than the center of the fifth wheel.
Slightly lower than the center of the fifth wheel.
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