Doubles Triples Test
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MIGUELS TEST/ DOUBLES TRIPLES
- 1.WHICH STATEMENT IS TRUE ABOUT DRIVING DOUBLES/TRIPLES?
- A.
Rearward amplification prevents crack-the whip effect
- B.
The rear trailer of a triple is less likely to tip over than a double.
- C.
A sudden steering movement can result in the rear trailer tipping over.
- D.
All of the above.
- 2.WHICH COMBINATION OF TRACTOR-TRAILERS SUFFERS MOST FROM THE CRACK-THE WHIP EFFECT?
- A.
5 axle tractor-semi trailer.
- B.
Turnpike double.
- C.
California truck-full trailer
- D.
Triple combination
- 3.WHAT'S THE CORRECT FOLLOWING DISTANCE WHEN PULLING A 100FT DOUBLE AT 30MPH?
- A.
At least 8 seconds.
- B.
At least 9 seconds.
- C.
At least 10 seconds.
- D.
At least 11 seconds.
- 4.WHAT'S THE CORRECT FOLLOWING DISTANCE WHEN PULLING A 100-FOOT TRIPLE COMBINATION AT 50MPH?
- A.
At least 5 seconds.
- B.
At least 7 seconds.
- C.
At least 10 seconds.
- D.
At least 11 seconds.
- 5.WHAT IS LIKELY TO HAPPEN WHEN THE TRAILER WHEELS OF A DOUBLE GOES INTO A SKID?
- A.
The combination will slide sideways.
- B.
The trailer will jackknife.
- C.
The rig will continue moving straight ahead.
- D.
The front wheels of the tractor will skid.
- 6.WHAT ARE CORRECT STATEMENTS ABOUT QUICK STEERING MOVEMENTS WITH DOUBLES AND TRIPLES?
- A.
You should apply the brakes during quick steering.
- B.
Doubles/triples tip over easily from quick steering.
- C.
Counter steering is easier with doubles and triples.
- D.
Stab braking is always used in quick steering.
- 7.WHAT ARE SOME GOOD TIPS ABOUT SEEING AHEAD WHEN DRIVING DOUBLES OR TRIPLES?
- A.
Allow more following distance.
- B.
Look far ahead so you can slow down gradually.
- C.
Looking ahead increases your safety.
- D.
All of the above answers are correct.
- 8.SAFE DRIVERS OF DOUBLES OR TRIPLES SHOULD:
- A.
Use special care in bad weather and mountain driving.
- B.
Look far ahead so you can slow down gradually.
- C.
Looking ahead increases your safety.
- D.
All of the above answers are correct.
- 9.IF YOU WANT TO HOOK A COMBINATION TO A SECOND TRAILER THAT HAS NO SPRING BRAKES AND YOU DON'T' HAVE WHEEL CHOCKS YOU SHOULD:
- A.
Park the trailer against a wall or building.
- B.
Supply air to the trailer air system (from the tractor), and disconnect the emergency line.
- C.
Hook the trailer electric cord to a generator to supply braking power.
- D.
All of the above.
- 10.IF YOU WANT TO HOOK A COMBINATION TO A SECOND TRAILER HOW DO YOU KEEP THE TRAILER FROM MOVING?
- A.
By using the trailer emergency brakes.
- B.
By using the trailer spring brakes.
- C.
By using wheel chocks.
- D.
Any of the above will work.
- 11.WHERE SHOULD THE HEAVIEST TRAILER BE PLACED WHEN CONNECTING TWO OR MORE TRAILERS TO THE TRACTOR?
- A.
In the front, next to the tractor.
- B.
In the rear, as the last trailer.
- C.
Don't connect trailers that are not the same weight.
- D.
None of the above.
- 12.WHAT ARE SOME FEATURES OF CONVERTER DOLLIES?
- A.
They have little braking power because they're small.
- B.
They usually need glad hand converters.
- C.
They do not have spring brakes.
- D.
All of the above.
- 13.IN COUPLING, WHAT IS THE CORRECT HIGHT FOR A TRAILER THAT IS BEING CONNECTED TO A CONVERTER DOLLY?
- A.
It must be slightly lower than the center of the fifth wheel.
- B.
The trailer must be higher than the top of the dolly.
- C.
The fifth wheel should be the same height as the kingpin.
- D.
The locking jaws and the kingpin flange should be the same height.
- 14.HOW MUCH SPACE SHOULD THERE BE BETWEEN THE UPPER AND LOWER FIFTH WHEEL AFTER COUPLING OF A CONVERTER DOLLY TO THE REAR TRAILER?
- A.
Drivers can't check the space visually.
- B.
It depends on the load.
- C.
Less than half inch.
- D.
No space at all.
- 15.IN ORDER TO SUPPLY AIR TO THE AIR TANKS OF A SECOND TRAILER YOU SHOULD:
- A.
Open the shut off valve at the rear of the first trailer and close the valve at the rear of the second.
- B.
Open the shut off valve of the second trailer and close the valve of the first trailer.
- C.
Close the shut off valve of both trailers.
- D.
Open the shut off valve of both trailers.
- 16.WHEN COUPLING DOUBLES, HOW CAN YOU BE SURE AIR IS SUPPLIED TO THE LAST TRAILER?
- A.
Open the hand valve and listen for air.
- B.
Look at the air gauge for each trailer.
- C.
Push in the tractor protection valve.
- D.
Open the emergency line shut-off valve at rear of last trailer.
- 17.WHAT COULD HAPPEN IN YOU UNLOCK THE PINTLE HOOK WITH THE DOLLY STILL UNDER THE REAR TRAILER?
- A.
Nothing will happen unless it rolls back.
- B.
The dolly tow bar may fly up.
- C.
The trailer emergency brakes will lock.
- D.
The pintle hook may bend.
- 18.ON A WALK AROUND INSPECTION OF A DOUBLE, THE POSITION OF THE DOLLY AIR TANK DRAIN VALVE AND PINTLE HOOK SHOULD BE:
- A.
Open, free.
- B.
Closed, free.
- C.
Open, latched.
- D.
Closed, latched.
- 19.SHOULD THE PINTLE HOOK OF THE DOLLY BE LATCHED AFTER COUPLING?
- A.
Only if you are backing up.
- B.
Only when coupling a loaded trailer.
- C.
Yes.
- D.
No.
- 20.TO TEST THE TRAILER BRAKES OF A DOUBLE, TURN THE HAND VALVE ON, AND OPEN THE SERVICE LINE VALVE AT THE REAR OF TH RIG. YOU SHOULD HEAR:
- A.
A low intermittent whistle.
- B.
The tractor protection valve pop out.
- C.
Air escapes from the open valve.
- D.
Nothing at all, if things are OK.
- 21.TO TEST THE TRAILER EMERGENCY BRAKES, YOU SHOULD CHARGE THE AIR BRAKE SYSTEM, CHECK THAT TRAILER ROLLS FREELY AND:
- A.
Push in the trailer air supply control
- B.
Pull out the trailer air supply control
- C.
Push in the tractor protection valve.
- D.
None of the above.
- 22.HOW DO YOU TEST THE TRAILER BRAKES OF A DOUBLE AFTER YOU HAVE TURNEDTHE HAND BRAKE ON?
- A.
Bring the air pressure up to normal.
- B.
Turn the parking brakes off.
- C.
Move slowly forward to see if the vehicle slows down.
- D.
All of the above.
- 23.HOW MUCH MORE STOPPING DISTANCE DO YOU NEED WHEN STOPPING A COMBINATION AT 40 MPH THAN AT 20MPH?
- A.
2 times.
- B.
4 times.
- C.
6 times.
- D.
10 times.
- 24.FOR EMERGENCY BRAKING WITH DOUBLES OR TRIPLES, YOU SHOULD BRAKE IN WHAT MANNER?
- A.
Use only the trailer brakes.
- B.
Use light, steady pressure on the brake.
- C.
Use controlled or stab braking.
- D.
Use lock braking and steering.
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