CDL COMBINATION EXAM LATEST UPDATE

CDL COMBINATION EXAM LATEST UPDATE When you check the lower fifth wheel, you do NOT need to check a) That there are no missing parts b) That you cannot see any space between the upper and lower fifth wheels c) That the shut-off valves completely closed d) Whether it has enough grease - CORRECT ANSWER c) That the shut-off valves completely closed Which of the following is most likely to roll over? a) The rear trailer of a triple b) The middle trailer of a triple c) The rear trailer of a double d) The front trailer of a double - CORRECT ANSWER a) The rear trailer of a triple What does the trailer air supply control do? a) By pushing it in, you supply the tires with air b) By pushing it in, you supply the trailer with air c) By pulling it out, you remove air from overinflated tires d) By pulling it out, you supply the trailer with air - CORRECT ANSWER b) By pushing it in, you supply the trailer with air When parking a vehicle that does not have spring brakes, you should use chocks a) To keep the trailer from offtracking so much CDL COMBINATION EXAM LATEST UPDATE 2 | P a g e b) To stop the trailer from jackknifing c) To help the trailer go more quickly d) To keep the trailer from moving - CORRECT ANSWER d) To keep the trailer from moving Which of the following should you do if you want to back into a curved path on the driver's side? a) Drive slowly while you are backing b) Use your mirrors on both sides c) First, check your path carefully, by getting out and walking around the vehicle d) Do all of the above - CORRECT ANSWER d) Do all of the above Which of the following is NOT a purpose of the emergency air line? a) To control a combination vehicle's emergency brakes b) To supply air to the trailer's air tanks c) To cause the trailer emergency brakes to be applied if the emergency air line loses pressure d) To supply air to relay valves that help the foot brake operate more quickly - CORRECT ANSWER d) To supply air to relay valves that help the foot brake operate more quickly Which of the following is NOT true about an antilock braking system (ABS)? a) You will find it on all tractors built after March 1998 b) It only activates if your wheels are in danger of locking up c) It is a service in addition to your normal brakes d) It increases your normal braking ability - CORRECT ANSWER d) It increases your normal braking ability CDL COMBINATION EXAM LATEST UPDATE 3 | P a g e Which of the following controls air in the service line? a) The trailer had brake b) Both the hand brake and the foot brake c) Neither the hand brake nor the foot brake d) The foot brake - CORRECT ANSWER b) Both the hand brake and the foot brake Which of the following is the definition of "offtracking?" a) How the rear wheels follow a different track than the front wheels in a turn b) Stopping for too long on breaks and getting "off the track" of your original schedule c) What happens when both the front wheels and the rear wheels leave the roadway in an accident d) How the rear wheels are more likely to leave the roadside or "track" - CORRECT ANSWER a) How the rear wheels follow a different track than the front wheels in a turn To prevent a rollover while driving a combination vehicle, the two most important things are a) Keeping cargo near the center of the vehicle and driving slowly on the highway b) Keeping cargo near the ground and driving slowly around turns c) Keeping cargo near the ground and driving slowly on the highway d) Keeping cargo near the center of the vehicle and driving slowly on turns - CORRECT ANSWER b) Keeping cargo near the ground and driving slowly around turns If you use the trailer hand valve while driving,