coupling devices and safe loading

Periodic visual inspection of fifth wheel and security of the coupling is required by law

• true

• false

it is critical to visually examine the_______ jaws to verify they have closed around the king pin after the trailer is connected.

• locking

• bearing

• roller

• split

Dumping the suspension to fit under the trailer can cause what problem

• fifth wheel may not properly lock around the king pin because the trailer is too high

• this is the recommend method of connecting a trailer

• Glad hands may not reach trailer

• excessive air pressure can build up in the brakes

Inspection of the fifth wheel includes which of the following

• checking tightness of mounting hardware and replacing any missing or damaged bolts

• checking for broken or distorted components and repair or replace, as needed

• checking the adjustment of the fifth wheel locks and adjusting them using the recommend service tools and procedures

• all of the above

All bolts holding the fifth wheels and coupling devices must be a minimum of a grade ___ bolts

• 5

• 6

• 7

• 8

if the locks cannot be properly adjusted due to wear, the fifth wheel must be____ or replaced

• greased

• adjusted past legal limits

• rebuilt

• throw away

What type of grease should be used on the fifth wheel top plate contact surfaces

• dry teflon spray

• WD-40

• PB blaster

• water resistant lithium based grease

Pintle hooks are considered to be out of service if any part of the horn section is reduced by more than 20%

• true

• false

The coupling king pin is attached to the

• tractor

• trailer

• convertor dolly

• yard dog

The sliding fifth wheel (if equipped) should be checked for excessive ____ or movement

• noise

• play

• interference

• runout