Always couple the lightest trailer behind the tractor and the heaviest trailer to the rear of the combination when pulling two trailers

• true
• False

Before you can supply air to the air tanks of a second trailer you need to

• open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer, enclose converter dolly air tank drain valves
• close the shut-off valves at the rear of the first trailer and open the shut-off valves at the rear of the second trailer, and open converter dolly air tank drain valve
• close the shut-off valves at the rear of both trailers
• open the shut-off valves at the rear of both trailers

When hooking the dolly to the rear trailer, the trailer height

• must be slightly lower than the center of the fifth wheel
• should allow the trailer to raise slightly when the dolly is pushed under it
• neither a or B
• both a and B

Converter dollies

• often do not have spring brakes
• never have spring brakes
• always have spring brakes
• are never used to couple a semi-trailer to the rear of the tractor-trailer

Double trailers jackknife more easily when loaded

• true
• False

If you are antiskid you should

• quickly countersteer
• pull down the trailer hand valve
• increase put pressure on brakes
• take your foot off the brake and restore traction to the tires. 

If the dolly has air brakes, they are released by opening the air tank  petcock

• true
• False

It is a good habit to chock the wheels before coupling a second trailer to your rig

• true
• false

While driving in a rainstorm during the day, how much following distance you should maintain from the vehicle ahead of you

• the same as normal conditions at night
• allow "much more space" then is needed for ideal driving conditions& twice as much is good conditions during the day
• about a football field, 300 feet

Never unlock the pintle hook with the dolly steel under the rear trailer

• true
• false

On slippery roads you must avoid

• braking too hard
• accelerating too hard
• following too closely
• all of the above

The converter dolly should be position in front of the second trailer and in line with the kingpin

• true
• False

The trailer should be slightly lower than the center of the field will

• true
• False

When coupling a second semitrailer, the dolly should always be at least one yard away from the nose of the trailer

• true
• false

Regardless of the top of skid, to restore vehicle control, you must

• accelerate
• counter steer
• restore traction to the tires
• stop as quickly as possible

There should be no space between the upper and lower fifth wheel when properly coupled

• true
• False

To set the trailer emergency brakes if the second trailer does not have spring brakes, you should drive the tractor closer to the trailer, connect the emergency line and charge the air tank, then disconnect the emergency line

• true
• False

To connect the converter dolly to the front trailer, you should lock the pintle hook in secure the converter gear support in the raised position

• true
• false

What is the best way to keep your brakes from overheating when going down a long grade

• get in proper gear, use braking effects of engine and apply brakes firmly when "safe" speed is reached
• with them thoroughly at the top of the Hill
• use only the trailer brakes
• use very light city brake pressure

Unlocking the pintle hook with the dolly steel under the rear trailer

• good cause the dolly towbar to fly up, possibly causing injury
• is proper procedure
• could cause the tractor to launch four, possibly causing injury

What is the procedure to make sure that you supplied air to the rear trailer

a. Open the emergency line shut-off on the rear trailer.

b. Open the hand valve with the rig parked.

c. Confirm that air pressure is in normal operating range.

d. Turn off the engine. Check for air pressure drop. 

When pulling more than one trailer, which of the following is correct

• the heaviest trailer must always be in the first position behind the tractor
• the lightest trailer must be in the first position behind the tractor
• Rearward implication will decrease significantly
• the short trailer goes in front of the long one

And triples you should always look at least 12-15 seconds I. At highway speeds this will be

• about the length of a football field: 300 feet
• about 1/4 mile
• about 1/2 miles
• doubled