| 838 What three methods can you use to secure a second trailer before coupl... Answer603 What is a converter dolly used for?... Answer529 On older vehicles there may be a lever, rather than a knob, for the tr... Answer477 To uncouple the converter dolly you should:... Answer468 When the emergency line loses pressure, what happens to the tractor pr... Answer438 To uncouple the converter dolly, you should:... Answer379 When coupling twin trailers, you should release the dolly brakes by:... Answer371 What happens when you push in the trailer air supply control knob and ... Answer367 To uncouple the converter dolly, you should:... Answer366 Which valves on the service line on the trailer connect the trailer ai... Answer360 The stopping distance for a tractor trailer traveling 55 mph on dry pa... Answer357 A drive-wheel skid when pulling doubles could result in a jackknife wh... Answer326 Which of these statements about seeing ahead is true?... Answer325 When coupling doubles, start by:... Answer293 What is one purpose of the emergency air line?... Answer292 Which valve keeps air in the tractor or truck if the trailer breaks aw... Answer286 When coupling the rear trailer, the correct trailer height is:... Answer260 To test the trailer service brakes you should:... Answer256 When inspecting doubles, the shut off valves at the rear of the traile... Answer251 Do all converter dollies have spring brakes?... Answer247 The best way to stop all skids is to:... Answer239 To connect the glad hands, the tow seals are pressed together with the... Answer237 If you want to couple a second trailer to your combination vehicle, se... Answer235 Do trailers made before 1975 have spring brakes?... Answer231 Inspect a converter dolly as if it were:... Answer217 You are doing a walk around inspection of a double or triple trailer r... Answer205 You should test your tractor protection valve to avoid:... Answer203 When can you use the trailer hand valve for parking a combination vehi... Answer203 Coupling and uncoupling methods are the same for more common tractor-t... Answer192 To test the trailer service brakes, you should:... Answer191 To test the trailer service brakes you should:... Answer191 Which of these statements about managing space to the sides is true?... Answer188 What are two reasons why doubles and triples take up more space than o... Answer175 The best way to keep brakes from overheating while going down a steep ... Answer175 Which of these is not a good thing to do when driving on slippery road... Answer173 When driving doubles or triples how whould they be driven to avoid rol... Answer166 What happens to the trailer emergency brakes if there is a loss of pre... Answer163 What is a reason why there is more chance of skids with doubles and tr... Answer161 What is it called when the rear wheels follow a different path than th... Answer153 When connecting the converter dolly to the rear trailer, you should re... Answer133 Which of these will result in the best control on curves?... Answer130 Should you unhook the pintle hook with the converter dolly still under... Answer127 You should use different methods for uncoupling second and third trail... Answer121 When steering to avoid a crash while pulling doubles, remember to:... Answer117 For the safest handling on the road when pulling doubles and triples, ... Answer114 If the tractor protection valve closes, letting air out of the trailer... Answer114 Doubles and triples take up more space and are longer than other comme... Answer111 If your trailer has started to skid, what should you do to get tractio... Answer106 To check for air flow to the last trailer:... Answer99 Which of these statements about handling of doubles and triples is tru... Answer98 In normal driving, should you ever use the trailer hand valve before t... Answer90 Why should you lock the glad hands to each other when you are not towi... Answer87 Which is true of empty trucks?... Answer85 When pulling triple trailers, always put the heaviest trailer:... Answer83 If the air lines on a truck are color coded, which lines are blue?... Answer81 If a converter dolly is still under the second trailer and you unlock ... Answer73 If the spring brakes do not release when you push the trailer air supp... Answer73 It is dangerous to unlock the pintle hook with the dolly still under t... Answer65 Doubles and triples are not as likely to turn over as are other combin... Answer49 In allowing more space, what should you do before entering or crossing... Answer49 It is alright to not check all the critical parts when doing a pretrip... Answer34 The dolly tow bar may fly up if you unlock the pintle hook with the co... Answer33 When pulling triple trailers, which unit is more likely to roll over:... Answer22 There are more things to inspect on a combination vehicle than on a si... Answer21 Special care should be taken when pulling two or three trailers becaus... Answer21 To uncouple double trailers, you should park your rig:... Answer19 When pulling triple trailers, which unit is more likely to roll over?... Answer17 You should do a walk around inspection when preparing to pull doubles ... Answer14 Is it important to be careful when driving doubles and triples?... Answer |
