CDL Combination Vehicles
- ANS-THE DRIVER CROSSES THE AIR LINES WHEN HOOKING UP TO AN OLD TRAILER.
WHAT WILL HAPPEN?
3 - ANS-THE AIR LEAKAGE RATE FOR A COMBINATION VEHICLE (ENGINE OFF, BRAKES
OFF) SHOULD BE NO MORE THAN ____ PSI PER MINUTE.
4 - ANS-THE AIR LEAKAGE RATE FOR A COMBINATION VEHICLE (ENGINE OFF, BRAKES
ON) SHOULD NOT BE MORE THAN ____ PSI PER MINUTE.
All of the above are acceptable - ANS-When coupling, it is acceptable to:
Applying and releasing the trailer brakes and listening for brake sounds. - ANS-AFTER YOU
SUPPLY AIR TO THE TRAILER, MAKE SURE THE AIR LINES ARE NOT CROSSED AND
THE TRAILER BRAKES ARE WORKING. THIS IS DONE BY:
At normal pressure. - ANS-YOU SHOULD NOT BACK A TRACTOR UNDER A TRAILER UNTIL
THE WHOLE AIR SYSTEM IS:
Because if the air pressure leaks away or down, there will be no brakes. - ANS-WHY SHOULD
YOU USE CHOCKS WHEN PARKING A TRAILER WITHOUT SPRING BRAKES?
Because of the danger of making the trailer skid. - ANS-WHY SHOULD YOU NOT USE THE
TRAILER HAND VALVE WHILE DRIVING?
Bobtail tractors take longer to stop than loaded combination vehicles. - ANS-WHICH ONE OF
THE FOLLOWING STATEMENTS IS TRUE?
Directly in front of the trailer. - ANS-WHEN YOU GET READY TO BACK UNDER THE
TRAILER, LINE UP:
Emergency and service lines at the back of the last trailer closed, valves on the trailer open. -
ANS-WHICH SHUT-OFF VALVES SHOULD BE OPEN AND WHICH CLOSED?
False - ANS-THE FEWER AXLES ON A UNIT, THE MORE STABLE IT IS?
False - ANS-TO DRIVE YOU NEED TO RAISE THE LANDING GEAR ONLY UNTIL IT JUST
LIFTS OFF THE PAVEMENT. TRUE OR FALSE?
It is used to supply the trailer with air, shut the air off, and put on the trailer emergency brakes -
ANS-DESCRIBE WHAT THE TRAILER AIR SUPPLY CONTROL DOES:
- ANS-THE DRIVER CROSSES THE AIR LINES WHEN HOOKING UP TO AN OLD TRAILER.
WHAT WILL HAPPEN?
3 - ANS-THE AIR LEAKAGE RATE FOR A COMBINATION VEHICLE (ENGINE OFF, BRAKES
OFF) SHOULD BE NO MORE THAN ____ PSI PER MINUTE.
4 - ANS-THE AIR LEAKAGE RATE FOR A COMBINATION VEHICLE (ENGINE OFF, BRAKES
ON) SHOULD NOT BE MORE THAN ____ PSI PER MINUTE.
All of the above are acceptable - ANS-When coupling, it is acceptable to:
Applying and releasing the trailer brakes and listening for brake sounds. - ANS-AFTER YOU
SUPPLY AIR TO THE TRAILER, MAKE SURE THE AIR LINES ARE NOT CROSSED AND
THE TRAILER BRAKES ARE WORKING. THIS IS DONE BY:
At normal pressure. - ANS-YOU SHOULD NOT BACK A TRACTOR UNDER A TRAILER UNTIL
THE WHOLE AIR SYSTEM IS:
Because if the air pressure leaks away or down, there will be no brakes. - ANS-WHY SHOULD
YOU USE CHOCKS WHEN PARKING A TRAILER WITHOUT SPRING BRAKES?
Because of the danger of making the trailer skid. - ANS-WHY SHOULD YOU NOT USE THE
TRAILER HAND VALVE WHILE DRIVING?
Bobtail tractors take longer to stop than loaded combination vehicles. - ANS-WHICH ONE OF
THE FOLLOWING STATEMENTS IS TRUE?
Directly in front of the trailer. - ANS-WHEN YOU GET READY TO BACK UNDER THE
TRAILER, LINE UP:
Emergency and service lines at the back of the last trailer closed, valves on the trailer open. -
ANS-WHICH SHUT-OFF VALVES SHOULD BE OPEN AND WHICH CLOSED?
False - ANS-THE FEWER AXLES ON A UNIT, THE MORE STABLE IT IS?
False - ANS-TO DRIVE YOU NEED TO RAISE THE LANDING GEAR ONLY UNTIL IT JUST
LIFTS OFF THE PAVEMENT. TRUE OR FALSE?
It is used to supply the trailer with air, shut the air off, and put on the trailer emergency brakes -
ANS-DESCRIBE WHAT THE TRAILER AIR SUPPLY CONTROL DOES:
