MIGUELS TEST/ DOUBLES TRIPLES
Rearward amplification prevents crack-the whip effect
The rear trailer of a triple is less likely to tip over than a double.
A sudden steering movement can result in the rear trailer tipping over.
All of the above.
5 axle tractor-semi trailer.
Turnpike double.
California truck-full trailer
Triple combination
At least 8 seconds.
At least 9 seconds.
At least 10 seconds.
At least 11 seconds.
At least 5 seconds.
At least 7 seconds.
At least 10 seconds.
At least 11 seconds.
The combination will slide sideways.
The trailer will jackknife.
The rig will continue moving straight ahead.
The front wheels of the tractor will skid.
You should apply the brakes during quick steering.
Doubles/triples tip over easily from quick steering.
Counter steering is easier with doubles and triples.
Stab braking is always used in quick steering.
Allow more following distance.
Look far ahead so you can slow down gradually.
Looking ahead increases your safety.
All of the above answers are correct.
Use special care in bad weather and mountain driving.
Look far ahead so you can slow down gradually.
Looking ahead increases your safety.
All of the above answers are correct.
Park the trailer against a wall or building.
Supply air to the trailer air system (from the tractor), and disconnect the emergency line.
Hook the trailer electric cord to a generator to supply braking power.
All of the above.
By using the trailer emergency brakes.
By using the trailer spring brakes.
By using wheel chocks.
Any of the above will work.
In the front, next to the tractor.
In the rear, as the last trailer.
Don't connect trailers that are not the same weight.
None of the above.
They have little braking power because they're small.
They usually need glad hand converters.
They do not have spring brakes.
All of the above.
It must be slightly lower than the center of the fifth wheel.
The trailer must be higher than the top of the dolly.
The fifth wheel should be the same height as the kingpin.
The locking jaws and the kingpin flange should be the same height.
Drivers can't check the space visually.
It depends on the load.
Less than half inch.
No space at all.
Open the shut off valve at the rear of the first trailer and close the valve at the rear of the second.
Open the shut off valve of the second trailer and close the valve of the first trailer.
Close the shut off valve of both trailers.
Open the shut off valve of both trailers.
Open the hand valve and listen for air.
Look at the air gauge for each trailer.
Push in the tractor protection valve.
Open the emergency line shut-off valve at rear of last trailer.
Nothing will happen unless it rolls back.
The dolly tow bar may fly up.
The trailer emergency brakes will lock.
The pintle hook may bend.
Open, free.
Closed, free.
Open, latched.
Closed, latched.
Only if you are backing up.
Only when coupling a loaded trailer.
Yes.
No.
A low intermittent whistle.
The tractor protection valve pop out.
Air escapes from the open valve.
Nothing at all, if things are OK.
Push in the trailer air supply control
Pull out the trailer air supply control
Push in the tractor protection valve.
None of the above.
Bring the air pressure up to normal.
Turn the parking brakes off.
Move slowly forward to see if the vehicle slows down.
All of the above.
2 times.
4 times.
6 times.
10 times.
Use only the trailer brakes.
Use light, steady pressure on the brake.
Use controlled or stab braking.
Use lock braking and steering.
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