| 864 What three methods can you use to secure a second trailer before coupl... Answer629 What is a converter dolly used for?... Answer544 On older vehicles there may be a lever, rather than a knob, for the tr... Answer495 When the emergency line loses pressure, what happens to the tractor pr... Answer491 To uncouple the converter dolly you should:... Answer451 To uncouple the converter dolly, you should:... Answer403 When coupling twin trailers, you should release the dolly brakes by:... Answer396 What happens when you push in the trailer air supply control knob and ... Answer388 Which of these statements about seeing ahead is true?... Answer383 To uncouple the converter dolly, you should:... Answer381 Which valves on the service line on the trailer connect the trailer ai... Answer381 The stopping distance for a tractor trailer traveling 55 mph on dry pa... Answer374 A drive-wheel skid when pulling doubles could result in a jackknife wh... Answer343 When coupling doubles, start by:... Answer322 The best way to stop all skids is to:... Answer313 What is one purpose of the emergency air line?... Answer310 Which valve keeps air in the tractor or truck if the trailer breaks aw... Answer301 When coupling the rear trailer, the correct trailer height is:... Answer285 To test the trailer service brakes you should:... Answer277 Do all converter dollies have spring brakes?... Answer273 When inspecting doubles, the shut off valves at the rear of the traile... Answer252 If you want to couple a second trailer to your combination vehicle, se... Answer251 To connect the glad hands, the tow seals are pressed together with the... Answer249 Inspect a converter dolly as if it were:... Answer242 Do trailers made before 1975 have spring brakes?... Answer230 You are doing a walk around inspection of a double or triple trailer r... Answer226 Which of these is not a good thing to do when driving on slippery road... Answer219 When can you use the trailer hand valve for parking a combination vehi... Answer216 You should test your tractor protection valve to avoid:... Answer213 Coupling and uncoupling methods are the same for more common tractor-t... Answer211 Which of these statements about managing space to the sides is true?... Answer205 To test the trailer service brakes, you should:... Answer204 To test the trailer service brakes you should:... Answer201 What are two reasons why doubles and triples take up more space than o... Answer189 The best way to keep brakes from overheating while going down a steep ... Answer181 When driving doubles or triples how whould they be driven to avoid rol... Answer174 What is a reason why there is more chance of skids with doubles and tr... Answer172 What happens to the trailer emergency brakes if there is a loss of pre... Answer169 What is it called when the rear wheels follow a different path than th... Answer164 When connecting the converter dolly to the rear trailer, you should re... Answer154 Which of these will result in the best control on curves?... Answer140 Should you unhook the pintle hook with the converter dolly still under... Answer137 You should use different methods for uncoupling second and third trail... Answer126 When steering to avoid a crash while pulling doubles, remember to:... Answer123 For the safest handling on the road when pulling doubles and triples, ... Answer119 Doubles and triples take up more space and are longer than other comme... Answer118 If your trailer has started to skid, what should you do to get tractio... Answer118 If the tractor protection valve closes, letting air out of the trailer... Answer118 Which of these statements about handling of doubles and triples is tru... Answer112 To check for air flow to the last trailer:... Answer105 In normal driving, should you ever use the trailer hand valve before t... Answer97 Why should you lock the glad hands to each other when you are not towi... Answer95 Which is true of empty trucks?... Answer94 If a converter dolly is still under the second trailer and you unlock ... Answer92 If the air lines on a truck are color coded, which lines are blue?... Answer91 When pulling triple trailers, always put the heaviest trailer:... Answer83 It is dangerous to unlock the pintle hook with the dolly still under t... Answer77 If the spring brakes do not release when you push the trailer air supp... Answer72 Doubles and triples are not as likely to turn over as are other combin... Answer53 In allowing more space, what should you do before entering or crossing... Answer51 It is alright to not check all the critical parts when doing a pretrip... Answer38 The dolly tow bar may fly up if you unlock the pintle hook with the co... Answer35 When pulling triple trailers, which unit is more likely to roll over:... Answer26 There are more things to inspect on a combination vehicle than on a si... Answer23 Special care should be taken when pulling two or three trailers becaus... Answer23 To uncouple double trailers, you should park your rig:... Answer22 When pulling triple trailers, which unit is more likely to roll over?... Answer21 You should do a walk around inspection when preparing to pull doubles ... Answer16 Is it important to be careful when driving doubles and triples?... Answer |
