the converter dolly air tank drain valve should be

9 You can also reach us at (888) 830-2326. You are driving a 100-feet truck with double trailers at 30 mph. This would be very dangerous. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. How do you know if your converter dolly is equipped with antilock brakes? You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. B. keep other traffic out of your side space 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 _______. 0000001775 00000 n This has the same value as the %%TIME_USED%% Variable on the Final Screen. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can Double/Triple Flashcards | Quizlet The best way to keep brakes from getting to hot while going down long grades is to: Go slow and use only light, steady pressure on the brakes. 0000001354 00000 n Leave the emergency line shut-off valve closed and open the service line valve. B C 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested How much space should be between the upper and lower fifth wheels? 1) the first one is to pump down the air pressure in the system between 20 and 45psi (pounds per square inch) the trailer air supply will pop out, shutting air off to the trailer. go to the rear of the second trailer and open the emergency line shut off, before you can supply air to the air tanks of the second trailer you need too, open the shut-off valves at the rear of the first trailer & close the shut-off valves at the rear of the second trailer. Charge the system and pump the brakes with the window down. Hazardous materials must be placarded on all four sides of EACH Trailer. A) one inch of space . On a triple combination, the shutoff valves on the rear of the last trailer should be? The couplers have a rubber seal that prevents air from escaping. Once that's complete, then its an easy push back and the locked . These dollies will have a yellow lamp on the left side of the dolly. Hook dolly to front trailer. Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. Flashcards - Doubles Triples Test #3 - FreezingBlue By using this site, you agree to be bound by our Terms of Use, Privacy Policy and Cookie Policy, Copyright 2000-2023 MH Sub I, LLC dba Internet Brands. 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. Make sure to visually inspect the fifth wheel and that the locking mechanism is Their drawbars differentiate them. D Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. There is more chance for skids and loss of traction. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. Free CDL - Doubles and Triples Flashcards | Quizlet D Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. Closed, free, 8. What should you check for when inspecting the converter dolly and the pintle hook? 0000002446 00000 n You are driving with double trailers and must use your brakes to avoid a crash. When driving with more than one trailer, which trailer should be the first one behind the tractor? The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? and the converter dolly air tank drain valve should be _____. You should keep at least ____ seconds of space ahead of you. While it is general practice to make blue the service line, red the emergency line, and green the electrical line, these colors are not required by any laws or regulations. C. fully raised, Which of these statements about speed management and braking is true? Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! D. Make sure the spare tire is secured, if it has one. 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 _____. Allow much more space than is needed for ideal driving condition. There is a school zone ahead. Each trailer and converter dolly has one or more air tanks. You are driving a triple trailer and there is a loss of air pressure in the emergency line. 1/2 to 3/4 of an inch You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. unsafe slow down even further, or better yet, find a safe haven and park until the you are driving on a slippery road during the day. When checking the fifth wheel, you should make sure that it has enough? Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. A. closed; latched The application only takes one minute. Make sure you can hear air escaping with the valve closed. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. For a particular IC-fabrication process, the transconductance parameter kn=400A/V2,k_{n}^{\prime}=400 \mu \mathrm{A} / \mathrm{V}^{2},kn=400A/V2, and Vt=0.5V.V_{t}=0.5 \mathrm{V}.Vt=0.5V. C. close the shut-off valves at the rear of the first trailer and open the shut-off valves at the rear of the second trailer, To check that the converter dolly is securely coupled to the rear trailer, you should: You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. Stop the vehicle by gearing down and sparingly 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. We are an independent company focused on providing valuable motor vehicle and permit practice test information. Blue is used for the service lines, and red for the emergency (supply) lines. They provide the air pressure used to operate trailer brakes. B. do not need to be checked as often as flat mirrors because they show a larger area The number and size of air tanks varies among vehicles. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. You are driving a 100 foot twin trailer combination at 50 mph. Never, 9. Pickup at South Loop. Pull gently against the pin of the second trailer. These mirrors: which of these statements about the handling of doubles and triples is true ? All material on this website is copyrighted. Definition. Only a certified diesel mechanic can check this. weather passes. Be sure air-lines are supported and glad hands are properly connected. b. cell 0000005345 00000 n You can find it here: High Road 2.0. Often do not have spring brakes Because of this, which of the following vehicle parts is most likely to tip over? 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. D 0000003060 00000 n B. slow to a safe speed before entering the curve, then accelerate slightly through it 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 does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? C. closed, You can release the dolly brakes by: More driving knowledge, questions and answers, online practice tests for obtaining a drivers . CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. 3. This is CDL Doubles and Triples Test 3in our original Classic Mode. B. open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer The dolly tow bar may flip up causing bodily injury and making it very difficult to mTouch Quiz will automatically populate the fields below. 9. On double and triple combinations, you must make sure that which of these is secure? B. allow one vehicle length for every 10,000 lbs of gross vehicle weight Open the emergency line shut-off valve at the rear of the last trailer. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. The heavier trailer should be in the rear. Open, free 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 Converter dollies have spring brakes. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. 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? During normal operation the brakes of the double/triple trailer are controlled by: You are driving at night and you must dim your headlights for traffic. 4. They are filled by the emergency (supply) line from the tractor. Your vehicle is so long that you must swing wide to make the turn. A. countersteer Email Updates When New Articles Are Posted. While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. 2003-2023 Chegg Inc. All rights reserved. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. not have spring brakes. You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. 27. can and will get stuck on a raised railroad crossing. C. posted speed limits on curves are safe for all trucks, Empty trucks: What should you check for when inspecting a converter dolly? Number of wrong answers. Should the shut-off valves on the rear of the last trailer be open or closed? Nothing, the weight of the trailer will keep it in place, 10. you are doing a walkaround inspection of a double or triple trailer rig. The trailer brakes will unlock Make sure the converter dolly air tank drain valve is closed. open, closed, closed: Term. 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. When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? 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. A. use the engine brake or speed retarder Compressed air usually has some water and some compressor oil in it. Converter dollies: Which is most likely to tip over: If the fifth wheel on a coupling is too far forward, the tractor frame may hit? 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. When checking the coupling system, make sure that the locking jaws are around the shank of the. What types of trailers can get stuck on raised crossings? B A bent or damaged kingpin on a coupling should be? you are visually checking the coupling of a converter dolly to the rear trailer. Which of these statements about the handling of doubles and triples is true? Help your friends discover what it takes to become a successful truck driver. What do you check when making a visual check of coupling? Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for Should I Be A Truck Driver? A turn of the glad hand attached to the hose will join and lock the couplers. It is very important to keep the air supply clean. Mar 2 - Mar 3. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. How can you test that air flows to all trailers? In order to supply air to the air tanks of a second trailer, you must ______ shut-off valves at the rear of the first trailer and ________ the shut-off valves at the rear of the second trailer. D A. brake and downshift in a curve If the spring brakes do not release when you push the trailer air supply control, check the air line connections. You want to lock your combination to a second trailer that has no spring brakes. When coupling, be sure to couple the proper glad hands together. A. use a low gear The service brakes slowly move to the fully applied position 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. 0000001956 00000 n The road is dry and visibility is good. True! Why should you check for when inspecting the converter dolly? Follow the procedures described later in this section. Safety should never take second place, so know your stuff! A 0000005733 00000 n The road is dry and visibility is good. On the first trailer in a set of doubles? 1 Park on level ground, put chock on the tires, and charge the air tank. This will prevent water and dirt from getting into the coupler and the air lines. Good speed management says you should: You must drive through deep or flowing water. to re-capture it. There is no requirement or exact standard for color coding. The pintle hook should always be secure when the vehicle is in motion. 0000010306 00000 n The road is dry and the visibility is good. This has the same value as the %%TOTAL%% Variable on the Final Screen. C. use stab or controlled braking, Which of these is true? Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? 0000003261 00000 n A slow to safe speed before entering, then accelerate slightly through the curve. 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? securely fastened. Make sure trailer height is correct. 0000003977 00000 n 0000001107 00000 n True! you should check the trailer height before connecting a converter dolly to a second or third trailer. You will speak with recruiters today. B. johnson bar 3. C. engaging the tractor valve protection control, You must drive through deep or flowing water. A. open the shut-off valves at the rear of both trailers Why should you not use the trailer hand valve while driving? 0000009556 00000 n Slow to a safe speed before entering the curve, then coast through the curve. If you want to couple a second trailer to your combination vehicle, secure it by using: The crack-the-whip effect that troubles trucks with trailers is most likely to cause a tip over: You are driving on a slippery road during the day. inspection of all equipment. To check air flows to all trailers, you should let air pressure reach normal then? High Road 2.0! A. hand valve Shut-off valves (at rear of trailers, in service and emergency lines): When pulling doubles or triples, what is important to know about the order of the trailers? By clicking the ["Send"] button, you agree to our Terms of Use and Privacy Policy, and to the use of cookies described therein, and you also consent to the collection, storage, and processing of your data in the United States where the level of data protection may be different from that in your country. A vehicle transporting hazardous materials is required to display placards where? Delivering to. front of the second trailer. 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