The total number of questions. A 27. Which is most likely to tip over: You can test that air is flowing to all trailers by opening? A. release the spring brakes and check for movement This will supply air to the emergency (supply) lines. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! ), a 15 year truck driving veteran, in January 2007. None of the above, 2. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. If the spring brakes do not release when you push the trailer air supply control, check the air line connections. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? 0000002636 00000 n
Doubles and triples must be driven very smoothly to avoid rollover or jacknife. The number and size of air tanks varies among vehicles. When inspecting doubles and triples you must make sure there is air all the way to the back of the last trailer, otherwise what may not work? A) closed . Why is there still destructive interference? B. you can almost always stop more quickly than you can turn Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. Number of wrong answers. Never, 9. Leave the emergency line shut-off valve closed and open the service line valve. It's a fifth wheel, not a sixth wheel. You are driving a 100-feet truck with double trailers at 30 mph. The rear trailers shut off valves should be closed and the front open to allow air to the For emergency braking you should: May have poor traction due to bouncing and wheels lockup. Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds. Locking jaws closed on This will prevent water and dirt from getting into the coupler and the air lines. C. engaging the tractor valve protection control, You must drive through deep or flowing water. You should look into the back of the fifth wheel on a dolly to see if it is locked onto the kingpin, A safe speed on a curve for a straight truck or a single trailer combination vehicle may be too fast for double or triple trailers. When uncoupling a rear trailer, you should remove some weight from the dolly by? Visually check to make sure that the rear trailer is slightly lower than the center of the Good speed management says you should: You must drive through deep or flowing water. trailer
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In double and triple trailers, the trailer air supply control should pop or _________ when air pressure drops into the range of 20 to 45 psi. Follow the procedures described later in this section. securely fastened. not have spring brakes. If one air system is very low on pressure _______. Why should you not use the trailer hand valve while driving? The road is dry and the visibility is good. Which of the following must be connected when coupling tractor to trailer or trailer to trailer? None of the above, 4. Should I Be A Truck Driver? The converter dolly air tank drain valve on coupled double and triple trailers should be: A. open B. closed C. partially opened B When inspecting coupled doubles and triples, make sure the pintle hooks are: A. secured to the safety pins B. in the open position C. latched C Which of these is true? A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed All trademarks are property of their respective owners. when driving a truck with more than one trailer, which trailer should be first behind the truck? When driving a double or triple trailer, greater care must be given to. The trailer brakes will unlock 2. 4. Make sure you do not get in a spot you cannot pull straight through. Select the answer that correctly completes each statement. In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. 0000005345 00000 n
Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. When you're finished, check your score and results. 2003-2023 Chegg Inc. All rights reserved. TestPermit.com is not affiliated, endorsed, or sponsored by state agencies or any motor vehicle and any other departments in the United States, Canada, UK. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. A. open All rights reserved 2022 TestPermit.com, CDL Doubles and Triples Test Question and Answers, Divided Highway Sign: Meaning, Quiz Definition, Example, Shape, Location, Color, Narrow Bridge Sign: Meaning, Quiz Definition, Example, Shape, Location, Color, STOP Sign 2023 Meaning, Quiz Definition, Example, Shape, Location, Color, Crossbuck Sign: Meaning, Definition, Example, Shape, Location, Color, Georgia CDL Permit Practice Test 2023 Study Guide [PDF], Georgia Motorcycle Permit Test 2023 with Study Guide [PDF], Georgia Permit Test 2023 (DDS Practice Test UPDATED), Georgia ADAP Practice Test 2023 Questions Answers Online, Ohio CDL Permit Practice Test 2023 Study Guide [PDF], Ohio Motorcycle Permit Test 2023 Study Guide [PDF]. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. inspection of all equipment. The service air line is only used to control the service brakes (when you press on the brake pedal or use the trailer hand-valve). When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. A. always keep your vehicle to the right side of your lane Newer trailers have spring brakes just like trucks and truck tractors. Safety fail-safe features of a tractor-trailer converter dolly. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. Check them all. When you do this, you should hear: Doubles and triples must be driven very smoothly to avoid rollover or jackknife. retrovirus $_____________________________$. Typically depends on the axle count. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. D 1/2 to 3/4 of an inch What is one function of the tractor protection valve? A vehicle transporting hazardous materials is required to display placards where? The lightest trailer 0000003977 00000 n
which of these statements about managing space to the sides is true? Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. TestPermit.com provides free unofficial review materials for a variety of exams. Close the emergency line shut-off valve at the rear of the trailer. Allow much more space than is needed for ideal driving condition. A low air buzzer will go off indicating something is wrong and either the front or the The individual voltage gains of the first two stages are to be equal, while the gain of the third is to be one-fourth of each of the first two. To check air flows to all trailers, you should let air pressure reach normal then? Often do not have spring brakes You should check the height of the trailer before connecting a converter dolly to a second or third trailer. Which diagram shows the best way to turn? Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. The rear trailers shut-off valves should be closed and the front open. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? 10 Use the dummy couplers when the air lines are not connected to a trailer. A dolly should be pulled out from a rear trailer using? will have a lamp on the drivers side. You should reduce your speed by about _____ on a wet road. Blue is used for the service lines, and red for the emergency (supply) lines. you can fuck a pornstar craigslist cars and trucks for sale by owner; kd linear actuator kdpt007 what is ait in the army; native american spiritual cleansing prayer simple spectrum coupon code; . Converter dolly air tank drain valve: CLOSED. A Doubles and triples take up more space than other commercial vehicles. Visually check to make sure that the lead trailer is slightly higher than the center of C B These valves permit closing the air lines off when another trailer is not being towed. 1 How do you check to make sure the trailer height is correct before coupling? They provide the air pressure used to operate trailer brakes. This has the same value as the %%TOTAL%% Variable on the Final Screen. You need to brake in order to regain control. What's a converter dolly? You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. A These dollies will have a yellow lamp on the left side of the dolly. The dolly tow bar may flip up causing bodily injury and making it very difficult to Therefore, look far ahead so you can slow down or change lanes gradually when necessary. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. If the dolly is a two axle unit then 1 You are visually checking the coupling of a converter dolly to the rear trailer. You should keep at least ____ seconds of space ahead of you. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? How do you know if your converter dolly is equipped with antilock brakes? To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and You must steer gently when pulling trailers. They are filled by the emergency (supply) line from the tractor. The road is dry, and visibility is good. When you uncouple twin trailers, the last step is to Converter dollies You want to hook your combination to a second trailer that has no spring brakes. 2 0000005733 00000 n
front of the second trailer. Any trailer, 7. Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? How much space should be between the upper and lower fifth wheel? The dolly tow bar may fly up Park on level ground, put chock on the tires, and charge the air tank. A converter dolly is If a converter dolly has spring brakes, you release the brakes by You have connected the converter dolly to the front semitrailer and then connected the rear semitrailer to the converter dolly. 0000007487 00000 n
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Older trailers do not have spring brakes. On a triple combination, the shutoff valves on the rear of the last trailer should be? C. 3, You are doing a walk around inspection of a double or triple trailer rig. If there is air there, then there is air towards the cab You want to hook up to the first trailer, then the converter dolly while it is lined up in A-dolly. When you're trying to correct a drive-wheel braking skid why should you stop braking? You should keep at least ____ seconds of space ahead of you. Single axle converter dollies are the most common type of converter dolly used in the U.S. C-dolly The C-dolly has two separate couplings, side-by-side. What does the Driver's manual say about how much space you should keep ahead of your truck? The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. allow "much more space than is needed for ideal driving conditions". your vehicle is so long that you must swing wide to make a turn. C. foot pedal, Which of these statements about managing space to the sides is true? The heaviest trailer The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. Open B. for doubles and triples, the fifth wheel should be all the way towards the tractor %PDF-1.2
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The road is dry and the visibility is good. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. you are driving a set of doubles and a set of trailer wheels goes in a skid. The emergency line valve open and release air D speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. B. slow to a safe speed before entering the curve, then accelerate slightly through it Do converter dollies have spring brakes? Trailer Air Tanks And Shutoff Valves - Page 50. You should be sure the converter dolly air tank drain . Safety chains secured to trailer (s). On a triple combination, the shutoff valves at the rear off the middle trailer should be? Which is most likely to tip over: A. Unlock the pintle hook only if the trailer it is under is loaded, otherwise the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. For emergency braking you should: On the middle trailer of a set of triples? Should the shut-off valves on the trailers be open or closed on a set of double trailers? The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. What do you check when making a visual check of coupling? How To Use Cruise Control Effectively As A Truck Driver. What types of trailers can get stuck on raised crossings? coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! Submit your email at the end of the test. This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. Some do. fifth wheel, so trailer is raised slightly when dolly is pushed under it. How can you test that air flows to all trailers? There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. [Penalties Applying to Any DUI Conviction; Driving Under the Influence of Drugs or Alcohol (The "DUI" Law); Section B-7 Alcohol, Other Drugs and Driving; Tennessee Comprehensive Driver License Manual]. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. Lock pintle hook. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space Compressed air usually has some water and some compressor oil in it. a sudden movement with the steering wheel can result in a tipped over rear trailer, you wish to turn right from one two-lane, two-way street to another. When driving a truck with more than one trailer, which trailer should be first behind the truck? B. you should avoid traveling next to others whenever possible Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. Which f these will result in the best control on curves? 0000008915 00000 n
The DMV doubles triples practice test will examine your knowledge of pulling double/triple trailers, coupling and uncoupling, inspecting doubles and triples, and checking air brakes. kingpin. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. Go to the rear of the rig. Which of these statements about quick steering movements and doubles/triples is true? If you're only pulling one trailer, the shut off valves should always be closed or else the air will simply escape out the back of the trailer. Which of these is NOT a good thing to do when driving on slippery roads? dress gifs. B. allow one vehicle length for every 10,000 lbs of gross vehicle weight Some areas of concern are discussed below. When coupling, be sure to couple the proper glad hands together. View the price and details of this FINSBURY PUMP SYSTEMS 400L (SINGLE STAGE) 5.5HP HONDA GX PETROL ENGINE (18M HOSE) FIRE WATER TANK | Mobile fire units. Locking jaws open The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. To help avoid mistakes, colors are sometimes used. A If you do cross the air lines, supply air will be sent to the service line instead of going to charge the trailer air tanks. A. use a low gear B. 0000001582 00000 n
3. B The converter dolly is an auxiliary axle with a coupling device. You should NOT: If spare tire is on converter gear (dolly), make sure it is secured. Please use the form below to contact our customer service or sales team. Make sure the converter dolly air tank drain valve is closed. Air pressure is sent from the air tanks to the brakes by relay valves. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. C. make things look larger and closer to you than they really are, When hauling triple trailers at a speed less than 40 mph, you should leave at least _____ second(s) for every ten feet of your truck between you and the vehicles ahead of you. paramount to safe driving.