| 950 When a tractor and a trailer are coupled, how much space should there ... Answer806 When inspect the coupling, you must make certain that there is enough ... Answer780 In what position should the air line shut off valves be when you check... Answer731 The air tanks on trailers and converter dollies are filled by:... Answer695 The emergency air line for:... Answer665 In order to supply air to the trailer, you must first:... Answer610 Which one of the following statements about tractor protection valves ... Answer599 The maximum air released when brakes are released is:... Answer579 The service air line is controlled by... Answer569 What is the emergency air line?... Answer537 For the coupling to be complete for a fifth wheel with a locking lever... Answer524 Why should you use chocks when parking a trailer without spring brakes... Answer487 You are driving a combination vehicle when the trailer brakes away, pu... Answer484 Other names for the Service Air Lines are?... Answer448 After applying brakes fully max on combination vehicles, what is the a... Answer446 If you cross connect the two air lines the following will result:... Answer441 What should the trailer height be before you connect a converter dolly... Answer435 The service line is for:... Answer423 Before you back under a semi-trailer in coupling your tractor at what ... Answer412 When you turn suddenly while pulling doubles, which trailer is most li... Answer394 Are fully loaded rigs more likely to roll over in a crash than empty r... Answer391 Why do large combination vehicles that are empty take longer to stop t... Answer370 The function of the trailer air supply control is:... Answer369 In order to inspect the coupling you should:... Answer358 A combination vehicle air brake system should not lose air faster than... Answer335 The trailer hand valve should be used:... Answer333 Coupling and uncoupling methods are the same for more common tractor-t... Answer329 You should swing wide to the left before starting a 90 degree turn:... Answer327 Which of the following statements about combination vehicles is true?... Answer327 When should you use the hand valve to park a combination vehicle?... Answer325 More than half of truck driver deaths in crashes are the result of tru... Answer302 Why should you not use the trailer hand brake to straighten out a jack... Answer297 Why should you check your mirrors whenever you apply the brakes hard?... Answer294 Semi trailers made before 1975 that are equipped with air brakes:... Answer291 A device which connects the service and emergency air lines from the t... Answer288 To prevent rollovers, remember to:... Answer283 When backing a tractor under a trailer, you should expect:... Answer282 Off tracking is:... Answer280 What are some things that you can do to avoid getting surprised and ha... Answer273 When coupling the trailer, back up slowly until:... Answer268 If you start a trailer skid, you should:... Answer268 When coupling the glad hands, you should NOT do the following:... Answer262 You have connected the air lines but have not yet backed under the tra... Answer256 Large combination vehicles take longer to stop:... Answer254 Since a sudden movement with your steering wheel can tip a trailer ove... Answer233 What tells how much pressure the relay valves should send to the trail... Answer229 Which is true when rolling up the landing gear to complete the couplin... Answer228 A trailer jackknife is:... Answer228 What two things can a driver do to prevent rollovers?... Answer226 The earliest way to notice a trailer skid is:... Answer225 You should use different methods for uncoupling second and third trail... Answer215 After you lock the kingpin into the fifth wheel how can you check the ... Answer214 Which one of the following is controlled by the foot brake?... Answer214 You should crank the landing gear until:... Answer209 When traveling under 40 mph, you should follow other vehicles:... Answer208 You should not back a tractor under a trailer until the whole air syst... Answer203 You have coupled with a semi trailer. In what position should you put ... Answer194 Before you back under the trailer, you should be sure that the trailer... Answer186 Before driving away, how can you always test the trailer brakes?... Answer184 If you will be pulling doubles where one trailer is more heavily loade... Answer182 Why should you lock the tractor gland hands (or dummy couplers) to eac... Answer177 The fifth wheel locking lever is not locked after the jaws close aroun... Answer171 You should not use the trailer hand valve while driving because:... Answer165 What happens if (only) the service line comes apart while you are driv... Answer155 Which amount should a combination vehicle NOT lost air faster than?... Answer149 The fifth wheel should be checked to see if:... Answer148 When you make a quick lane change, the trailer only may overturn. What... Answer148 When you get ready to back under the semi trailer you should line up:... Answer145 Offtracking occurs when you go around a corner and:... Answer139 Why must the fifth wheel plate have enough grease?... Answer137 Why must you be extra careful when bobtailing?... Answer133 The following two things will help prevent rollovers.... Answer126 Why should you never unlock the pintle hook with the dolly still under... Answer125 Looking into the back of the fifth wheel, which part of the kingpin sh... Answer123 The trailer air supply control:... Answer120 What is the cause of more than half the truck driver deaths in crashes... Answer119 After you have coupled the tractor with a trailer where should the lan... Answer106 If you start a trailer skid, you should:... Answer102 Before backing up how should you position the tractor in relation to t... Answer95 Which is true regarding the trailer air supply control?... Answer93 The dolly tow bar may fly up if you unlock the pintle hook with the co... Answer85 After you lock the kingpin into the fifth wheel how can you check the ... Answer80 A kingpin is:... Answer71 When the wheels of a trailer lock up, what will the trailer tend to do... Answer66 There are two things that a driver can do to prevent a roll over. They... Answer53 What should you use to be safe when you park trailers that don't have ... Answer53 Combination vehicles are usually heavier, longer and require more driv... Answer42 There are more things to inspect on a combination vehicle than on a si... Answer26 You should do a walk around inspection when preparing to pull Doubles ... Answer |
