the converter dolly air tank drain valve should be the converter dolly air tank drain valve should be

You should keep at least ____ seconds of space ahead of you. B. slightly open Any trailer with a reduced ground clearance A) one inch of space . When pulling a single trailer with a Shut-Off Valve, the valves must be in the: Trailers built before what year may not be equipped with trailer spring brakes? To check air flows to all trailers, you should let air pressure reach normal then? B. you should avoid traveling next to others whenever possible Slow to the safe speed before entering, then accelerate slightly through the curve. Nothing will happen, but an in-cab warning indicator will let you know about the problem, It will cause the tractor protection valve to close and the trailer emergency brakes to come on, It will cause the tractor protection valve to open and the trailer emergency brakes to come on, When you try to put the service brakes on, air will quickly leak and will lower the air tank pressure, possibly activating the trailer emergency brakes, The emergency brakes will come on automatically as soon as a major leak occurs, Nothing, but braking power will be reduced, Air pressure will quickly leak away, even if you are not using the service brakes, Using a combination of the emergency air line and the service air line, Supply air will be sent to the service line instead of going to charge the trailer air tanks which means the trailer spring brakes will not release, Newer vehicles automatically detect if the lines are crossed and will auto-correct itself, Air will continue filling the air holding tanks until the tanks rupture from excessive pressure, Supply air will cause all brakes to release and the truck will roll freely without any braking ability, Trailers typically do not have their own air tanks, Designed to turn off the truck engine when a brake failure occurs, Used in the service and supply air lines at the back of trailers used to tow other trailers, Placed at each trailer spring brake and are designed to engage the emergency brakes when air pressure becomes too high, The yellow and red air control knobs located in the cab of a truck, Used to secure the trailer kingpin to the tractor 5th wheel, Caps which cover the valve stems on tires, A name for the yellow and red air valves in the cab of a truck, Coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer, Email Updates When New Articles Are Posted. 0000006836 00000 n What should you check for when inspecting the converter dolly and the pintle hook? They provide the air pressure used to operate trailer brakes. True! 0000006383 00000 n Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. A Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? What will happen if there is a major leak in the service air line? In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. All other trailer air functions use the emergency line. the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. Pintle-eye of dolly in place in pintle hook of trailer (s). You are doing a walkaround inspection of a double or triple trailer rig. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? You should check the height of the trailer before connecting a converter dolly to a second or third trailer. How do you check to make sure the trailer height is correct before coupling? You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. kingpin. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. C. engaging the tractor valve protection control, You must drive through deep or flowing water. C. 3, You are doing a walk around inspection of a double or triple trailer rig. When testing the coupling of the double trailer the landing gears of the rear trailer should be: You want to hook your combination to a second trailer that has no spring brakes. We've all wondered if the adventure and challenges of life on the open road would suit us better than the ordinary day to day lives we've always known. The converter dolly air tank drain valve on coupled double and triple trailers should be: When inspecting coupled doubles and triples, make sure the pintle hooks are: How can you be sure you supplied air to a second trailer? 8. Double/Triple Flashcards | Quizlet 3. A. you can steer more quickly and safely if you hold the wheel with one hand Doubles/triples flip flop over from quick steering moves more easily than many vehicles. B B. allow one vehicle length for every 10,000 lbs of gross vehicle weight The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. B. for doubles and triples, the fifth wheel should be all the way towards the tractor Open the shut-off valves at the rear of the last trailer and listen for air flow. coupled to the rear of a tractor-trailer combination forming a double bottom rig, A coupling device of one or two axles and a sixth wheel by which a semitrailer can be trailer << /Size 59 /Info 20 0 R /Root 22 0 R /Prev 29211 /ID[] >> startxref 0 %%EOF 22 0 obj << /Type /Catalog /Pages 19 0 R >> endobj 57 0 obj << /S 66 /Filter /FlateDecode /Length 58 0 R >> stream Make sure you do not get in a spot you cannot pull straight through. Delivering to. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. The road is dry and visibility is good. Converter dollies are connected to front trailers with a? coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! Open, latched You are driving with double trailers and must use your brakes to avoid a crash. safe speed would be 40 MPH. C. may have poor traction due to bouncing and wheel lockup, Before you can supply air to the air tanks of a second trailer you need to: Speed for other vehicles is often too fast for a multi-combination unit! Why should you check for when inspecting the converter dolly? You can find it here: High Road 2.0. What does the Driver's manual say about how much space you should keep ahead of your truck? 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. New! Before you can supply air to the air tanks of a second trailer you need to. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? How can you test that air flows to all trailers? In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? 5. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). To do this without wheel chocks you should: When uncoupling the rear semitrailer, you should lower the converter dolly landing gear: When driving a double or triple, you need more space because they: Which of these statements about emergency steering is true? Allow much more space than is needed for ideal driving condition. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. What three methods can you use to secure a second trailer before coupling? When you turn with the tractor/triple trailer combination the wheels that off-track (cheat) the most are: You should check trailer height before connecting a converter dolly to a second or third trailer. When you are pulling trailers, which of the following statements is true about steering? D While doing a walkaround inspection of a double or triple, the converter dolly air tank drain valve should be _____, and the pintle hook should be _____. B. you can almost always stop more quickly than you can turn Doubles and triples take up more space than other commercial vehicles. These valves permit closing the air lines off when another trailer is not being towed. 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). Locking jaws open The pressure in the service line is controlled by the brake pedal and the trailer hand brake. What types of trailers can get stuck on raised crossings? Mar 2 - Mar 3. The road is dry and visibility is good. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. how much space should be between the upper and lower fifth wheel? If you're pulling more than one trailer, all valves should be open except the very last trailer, which should have all valves in the closed position. For emergency braking you should: You must steer gently when pulling trailers. C How do you check to make sure trailer height is correct before coupling? When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. can and will get stuck on a raised railroad crossing. B. do not need to be checked as often as flat mirrors because they show a larger area air throughout the system. Unless you are draining the condensation out of the air tank, then the drain valve They provide the air pressure used to operate trailer brakes. Be certain you are clear at the sides before changing lanes. you are driving on a slippery road during the day. 1/2 to 3/4 of an inch You should keep at least ___ seconds of space ahead of you. When inspecting a converter dolly What should you check for? If you are only pulling one trailer, make certain the valve is fully in the closed position or it will leak air out of the air system. ), a 15 year truck driving veteran, in January 2007. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! Explore now! 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. A 360 degree area of awareness is Trucks with trailers have a dangerous crack-the-whip effect. 1. 0000002446 00000 n Each trailer and converter dolly has one or more air tanks. Doubles and triples must be driven very smoothly to avoid rollover or jacknife. Air pressure is sent from the air tanks to the brakes by relay valves. Safety should never take second place, so know your stuff! Which of these is most likely too occur? Because of this, which of the following vehicle parts is most likely to tip over? Which of these is most likely to occur? If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? A turn of the glad hand attached to the hose will join and lock the couplers. The road is dry and visibility is good. We are an independent company focused on providing valuable motor vehicle and permit practice test information. 0000010705 00000 n A you want to hook your combination to a second trailer that has no spring brakes. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can recouple. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. Number of wrong answers. C. slow to a safe speed before entering the curve, then coast through it, Which of these is NOT a good thing to do when driving on slippery roads? Converter dollies have spring brakes. The converter dolly air tank drain valve on coupled double/triple Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds. The rear trailer does not have shut-off valves. That there is no space between upper and lower fifth wheel. 0000003261 00000 n How do you know if your converter dolly is equipped with antilock brakes? the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. In this order, the shutoff valves at the rear of front trailers, the rear of the last trailer and the converter dolly air tank drain valve should be? utilize the brakes. Double and Triples Part 1 Flashcards - flashcardmachine.com Open. A driver of a vehicle with double or triple trailers will have greater length and more dead axles to pull, increasing the likelihood of a wreck. B. use only the trailer brakes Doubles and triples must be driven very smoothly to avoid rollover or jackknife. Flashcards - Doubles Tripes Test #4 - FreezingBlue you are doing a walkaround inspection of a double or triple trailer rig. 0000001107 00000 n Any vehicle required by federal regulations to be placarded while transporting hazardous materials. Why is there still destructive interference? Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). [Flashing Signals, Traffic Signals, Chapter 5 - Signals, Signs and Pavement Markings, North Carolina Driver's Handbook], One component of the DUI sentence in the state of Tennessee is twenty-four hours of litter pick-up wearing clothing that says "I am a drunk driver." Air will not be available to release the trailer spring brakes (parking brakes). Please use the form below to contact our customer service or sales team. C You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. driven with care to avoid losing control, Make sure the spare tire is secured, if it has one, Make sure the converter dolly air tank drain valve is closed, Make sure safety chains are secured to the trailers, All of the above. While doing a walkaround inspection of a double or triple, the converter dolly air tank drain valve should be _______, and the pintle hook should be _______. Time allowed (Requires timer add on). Doubles/Triples Endorsement Flashcards | Quizlet A safe speed on a curve for a straight truck or a single trailer combination vehicle may be too fast for a set of doubles or triples. The application only takes one minute. Safety chains secured to trailer (s). Which of the following must be connected when coupling tractor to trailer or trailer to trailer? You must check that all shut-off valves are in the open position except the ones at the back of the last trailer, which must be closed. A. air escape from the open valve what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? The heaviest trailer To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space What is a converter dolly? There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. 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. Also available in App Store & Google Play. B When testing trailer service brakes, you should use? unsafe slow down even further, or better yet, find a safe haven and park until the Pull gently against the pin of the second trailer. 2022 DE Doubles - Triples CDL Quick Review 1 - CristCDL.com the road is dry & visibility is good. Flammable materials in the front trailer then it must have the placards on that trailer. When you do this, you should hear: C. open, except the one connected to the rear trailer should be closed, During normal operation the brakes on double and triple trailers are controlled by the: The emergency brakes come on whenever air pressure in the emergency line is lost. Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. Each trailer and converter dolly has one or more air tanks. and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. 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. However, converter dollies and trailers built before 1975 are not required to have spring brakes. 4. True! Which of the following is true about loading cargo into double or triple trailers? The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. 2003-2023 Chegg Inc. All rights reserved. At section 1, where the cross-sectional area is 0.02 m2m^{2}m2, the air is at 40.0 kPa (abs), 60C60^{\circ} \mathrm{C}60C, and M=2.0. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. which of these figures shows how the turn should be made, if you want to couple a second trailer to your combination vehicle, secure it by, the trailers spring brakes & wheel chocks. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. You must treat a flashing red signal as you would treat a STOP sign. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? Optional: Leave your email address if you would like a reply: When inspecting doubles or triples, in what position should the air shut-off valves be in? speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. 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? To help avoid mistakes, colors are sometimes used. [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]. Check them all. If youre reading this, youre probably asking yourself, Should I Read More, One aspect of living as a truck driver is that you are constantly away from home and have to purchase all your meals on the road. Then, the air loss from the leak will lower the air tank pressure quickly. Newer trailers have spring brakes just like trucks and truck tractors. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. Park the rear trailer against another trailer, chock the tires and lock the trailer For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B Make sure trailer height is correct. Have little braking power because they are small It is extremely unlikely you will drive a trailer built before 1975, but for the written exam, you still may need to know that trailers built before 1975 were not required to have spring brakes. When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. The shut off valves prevent air from going any further. Finsbury Pump Systems 400l (Single Stage) 5.5hp Honda Gx Petrol Engine Their drawbars differentiate them. None of the above, 5. View the full article to see how to set cruise control correctly! You are driving with double trailers and must use your brakes to avoid a crash. You should avoid traveling next to others when possible. When doing a walkaround inspection of a double or triple trailer, the shut-off valves should be _______ at the rear(s) of the front trailer(s) and ________ at the rear of the last trailer. HK Extended Tank Drain Assembly Kit with 10 Inch Braided Steel Hose 1/4 Inch Drain Valve and Elbow Fitting for Air Compressor 4.7 (463) $1499 FREE delivery Thu, Mar 9 on $25 of items shipped by Amazon Small Business All Tool Depot Air Compressor Drain Valve Replacement for Craftsman Petcock 072-0001, 072-0006 (1-Pack) 4.2 (20) $649 first check for battery voltage to the valve by probing the wires of the electrical connector with a volt-meter it should be about 10.5 volts if not it's probably bad.next remove the valve. These trailers have no parking brake. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. When does the "driver's manual" advise disconnecting the steering axle brakes to help If you are driving a 200-foot triple at 35 mph, what is the minimum amount of space (in seconds) that you should keep ahead of you? These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. The heavier trailer should be in the rear. A. allow "much more space" than is needed for ideal driving conditions You will speak with recruiters today. You must check that all shut-off valves are in the open position except the ones at the back of the last trailer, which must be closed. you are driving at night and you must dim your headlights for traffic. 0000005733 00000 n B. slightly raised when driving a truck with more than one trailer, which trailer should be first behind the truck? When driving doubles or triples how should they be driven to avoid rollover or jackknifing: A-dolly. Doubles Triples Endorsement Test Flashcards | Quizlet The rear trailers shut-off valves should be closed and the front open. 3. Simply click in your answer to each CDL practice test question. paramount to safe driving. If you leave this page, your progress will be lost. B. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. If it goes low enough, the trailer emergency brakes will come on.