ENDORSEMENT / CV

Combination Vehicles.

Selected practice questions on coupling, uncoupling, and tractor-trailer handling. Review the sections below or jump straight into a question set.

SECTION 2.1 1 prompts

Practice To be safe, you should carry ___ spare fuses.

SECTION 6.1 9 prompts

SECTION 6.2 24 prompts

Practice Air lines on a combination vehicle are often colored to keep them from getting mixed up. The emergency line is ___ and the service line is ___.
Practice When checking the trailer air brakes, you should ensure that:
Practice What color are the glad hands?
Practice When connecting the glad hands, press the two seals together with the couplers at a 90 degree angle to each other, and then:
Practice When coupling, the glad hands are used to connect:
Practice If you cross the air lines when coupling (hooking Red to Blue):
Practice In a double trailer combination, the shut-off valves at the back of the front trailer should be:
Practice A driver crosses the air lines when hooking up to an old trailer. What will happen?
Practice You are driving a combination vehicle. The trailer breaks away. The air lines are pulled apart. What stops the air from escaping the tractor?
Practice When you are driving a combination vehicle, the trailer breaks away and pulls apart both air lines. You would expect the trailer brakes to come on and:
Practice When you are driving a combination vehicle, the trailer breaks away and pulls apart both air lines. You would expect the trailer brakes to come on and:
Practice If you are driving a double trailer, the shut-off valves at the back of the last trailer should be:
Practice The Emergency Air Line (usually Red):
Practice If the emergency line (Red) comes apart while you are driving:
Practice Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
Practice You have a major leak in the service line and you put on the brakes. Service air pressure will escape and cause the:
Practice You have pushed in the trailer supply valve. You should not move the tractor until the whole air system is:
Practice The Service Air Line (usually Blue) is operated by:
Practice If the service line comes apart while you are driving, but the emergency line stays connected, what happens?
Practice What are 'Shut-off Valves'?
Practice You supply air to the trailer tanks by:
Practice The Tractor Protection Valve helps keep air in the tractor if:
Practice The Trailer Air Supply control (red octagon knob):
Practice The Trailer Hand Valve (Trolley Valve) should be used:

SECTION 6.4 43 prompts

SECTION 6.5 1 prompts

Practice When checking the trailer emergency brakes, the tractor protection control valve should be placed in the ___ position.

MISCELLANEOUS 1 prompts

Practice A bobtail is: