A driver crosses the airlines when hooking up to an old trailer. What will happen?

• The brake lights will not come on when the brake pedal is pressed.
• The hand valve will engage the tractor brakes instead of the trailer brakes
• The brake pedal will work the trailer spring brakes instead of the air brakes.
• If the trailer has no spring brakes, you could drive away but you wouldn't have the trailer brake

After hooking up, you should check the fifth wheel connection via…

• Pulling the tractor ahead gently after releasing the brakes with the trailer hand valve.
• Backing up with the trailer brakes released
• pulling the tractor ahead sharply to release the trailer brakes
• pulling the tractor ahead gently with the trailer brakes locked

After pushing in the trailer supply valve, you should not move the tractor until the whole air system…

• Falls to between 20 to 45 PSI
• is at normal pressure
• is up to the governor upper limit pressure, approximately 125 PSI
• is discharged

After coupling to a trailer, you should…

• Raised landing gear slightly off the ground and then tug gently with the tractor to test connection
• backup approximately 10 feet before leaving the terminal
• crawl under the trailer and visually check the connections
• both A and B

Upon coupling a semi-trailer, the front trailer supports (dollies) should be…

• Raised 1/2 way with the crank handle secured
• raised 3/4 way with the crank handle removed
• fully raised with the crank handle secured
• raised 1/2 way and secure in high gear

Airlines on a combination vehicle or usually colored to keep from getting them mixed up. The emergency line is…

• Red
• black
• blue
• yellow

Airlines on a combination vehicle or usually colored to keep from getting them mixed up. The emergency line is…

• Red
• black
• blue
• yellow

Air brakes equip trailer made before 1975…

• Usually do not have spring brakes
• Do not use S-cam drum brakes
• cannot be used with a dual air brake system
• are no longer in service

Air tanks should be drained…

• Daily
• each 2 hours or 100 miles
• at each fueling
• weekly

Cargo should be kept as close to the ground as possible

• true
• false

Crossed airlines or only dangerous if you do not have a tractor emergency brake.

• True
• False

Dummy, or dead-end, couplers prevent water and dirt from getting into the coupler and air lines.

a. True

b. False

Emergency airlines are coated with the color blue.

• True
• False

Fifth wheel jaws around the shank of the King PN when properly coupled

• true
• False

Fully loaded rigs are 10 times more likely to roll over in a Christ and empty ones

• true
• False

How for down the road should you look (eye lead time) when driving

• 5-8 seconds
• 12-15 seconds
• 1000 feet
• 300 feet

How much space should be between the upper and lower fifth wheels plates

• just enough to see daylight
• no more than 1/4 inches
• no less than 1/4 inches
• none

If the fifth wheel plate is not kept lubricated, it could call steering problems.

• True
• False

If the service line disconnects while you are driving, what will happen right away

• the emergency tractor brakes will come on
• the check valve will allow the trailer air tank to exhaust through the open line
• the emergency trailer spring brakes will come on
• nothing is likely to happen until you try the brakes

If you are using the proper eye-lead time, the distance down the road at which you will be looking, at highway speeds will be approximately…

• 5 seconds
• 1/2 mile
• a football field
• 1/4 miles

If the trailer is caring a load, when you crank down the landing gear, you should…

• Lower it until it just touches the ground
• crank a few extra turns after it has touched the ground
• low it until it almost touches the ground
• keep it in low gear until it touches the ground, then put it in high gear for remaining terms

If glad hands leak air after being properly connected to the trailer…

• Replace them
• switch them around (blue to red in red to blue)
• use "C" clamp(s) to tighten them in
• check and cleaned the rubber grommets and then re-connect and test

If one of the glad hands on your blue airline is missing a seal,…

• Common bubblegum will work until you can find a new seal
• you could end up with a service line air leak
• you could end up with an emergency line air leak
• you would not know until you set your parking brake

In normal driving, some drivers used the trolley (hand) valve before the brake pedal in order to prevent trailer skids. Which of the statement is true?

• It should never be done
• it results in less skating than using a brake pedal alone
• it allows absolute control against brakes lockup
• it is the best way to brakes in a straight line

Inspect a converter dolly as if it were…

• A trailer
• an axle with a fifth wheel
• a tractor
• none of the above

It is okay to use the trailer hand valve to straighten out a jackknifing trailer…

• Only if on dry roads
• under no conditions
• only on slippery/wet roads
• only if you are an experienced driver

It takes a bobtail longer to stop than a tractor semi-trailer

• true
• False

Jackknife will occur once the angle between the tractor and trailer reaches…

• 15°
• 30°
• 45°
• alignment

Lightly loaded trailers or less likely to jackknife then heavily loaded ones

• true
• False

Two types of jackknives or

• a tractor-trailer and bobtail
• trailer in tractor
• downhill and uphill
• wet and dry

Never back your tractor under a trailer at an angle

• true
• False

Off-tracking Can best be described as

• the wheels of the trailer will track further to the inside of a turn than the wheels of the tractor resulting in a path wider than the rig itself
• the wheels of the trailer will track further to the outside of a turn than the wheels of the tractor
• trailer fish-tailing, resulting in a serpentine type of track
• the tractor wheels will track further to the inside of a turn than the wheels of the trade

Rearward amplification causes a crack-the-whip affect

• true
• False

The hand valve should be used to park a combination vehicle

• if the trailer has to be backed up
• only when the trailer will be unhooked
• when parking on a steep downgrade
• under no circumstances