the converter dolly air tank drain valve should be

Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. If the dolly is a two axle unit then 1 What do you check when making a visual check of coupling? Pickup at South Loop. The trailer brakes will unlock 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. Usually need a glad hand converter They are filled by the emergency (supply) line from the tractor. A 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? 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. 0000001956 00000 n Tips for Backing Up a Trailer Like a Pro Trucker. In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. C. When coupling doubles and triples, be sure that the pintle-eye of the dolly is in place in the pintle hook of the trailer, You are driving on a slippery road during the day. d. protein. What is the most common foundation brake found on heavy vehicles? Doubles/triples flip flop over from quick steering moves more easily than many vehicles. 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. 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? Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. Before you can supply air to the air tanks of a second trailer you need to. front of the second trailer. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. A Clean the couplers and rubber seals before a connection is made. Slow to the safe speed before entering, then accelerate slightly through the curve. Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . You are doing a walkaround inspection of a double or triple trailer rig. A. open the shut-off valves at the rear of both trailers The crack the whip effect that troubles trucks with trailers. Double and Triples Part 1 Flashcards - flashcardmachine.com 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 What should you check for when inspecting a converter dolly? The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. CDL License Requirements State By State. A. use a low gear True! Follow the procedures described later in this section. Seriously! Air escape from the open valve B The service brakes slowly move to the fully applied position C The emergency line valve open and release air D None of the above 4. Open Because of this, which of the following vehicle parts is most likely to tip over? A. require shorter stopping distances than full ones Make sure pintle hook is latched. you are driving a 100ft truck eith double trailers at 50mph. If this lamp is illuminated and does not go out, Submit your email at the end of the test. 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. Use the dummy couplers when the air lines are not connected to a trailer. B You must stop, yield to traffic and pedestrians, and only proceed when safe. Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. 0000009577 00000 n Which 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. door. What happens when there is a major leak in the emergency air line? You can test that air is flowing to all trailers by opening? D. Make sure the spare tire is secured, if it has one. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. You shouldn't stop braking. You need to brake in order to regain control. What three methods can you use to secure a second trailer before coupling? Page 1 - Doubles/Triples Test Study Guide for the CDL The lightest trailer you are driving on a slippery road during the day. 0000005733 00000 n 1/4 in. We'll help you make the right choices and prepare for a great start to your trucking career. 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. If not, there is a problem. 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 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 _____. Calculate the voltage gain of each. Lock pintle hook. 0000002636 00000 n C A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. You should keep at least ___ seconds of space ahead of you. 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. A Open, latched B Open, free C Closed, latched D Closed, free 28. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. 0000010285 00000 n Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. and the converter dolly air tank drain valve should be _____. If the spring brakes do not release when you push the trailer air supply control, check the air line connections. None of the above, 2. These dollies will have a yellow lamp on the left side of the dolly. Either the front or the rear brakes will not work properly or fully. These trailers have no parking brake. On double and triple combinations, you must make sure that which of these is secure? Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. C. back up slightly and make a visual check of the coupling, You are driving with double trailers and must use your brakes to avoid a crash. C. engaging the tractor valve protection control, You must drive through deep or flowing water. Which of these statements about quick steering movements and doubles/triples 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 What is a converter dolly? TestPermit.com provides free unofficial review materials for a variety of exams. ), a 15 year truck driving veteran, in January 2007. What's a converter dolly? It is important not to let water and oil build up in the air tanks. [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]. It is very important to keep the air supply clean. At section 2 downstream, the speed is 519 m/s. You should reduce your speed by about _____ on a wet road. How can you be sure you supplied air to a second trailer? A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. Leave the emergency line shut-off valve closed and open the service line valve. B. slow to a safe speed before entering the curve, then accelerate slightly through it You are driving a 100 foot twin trailer combination at 50 mph. A. air escape from the open valve You are visually checking the coupling of a converter dolly to the rear trailer. Doubles and triples must be driven very smoothly to avoid rollover or jacknife. When driving with more than one trailer, which trailer should be the first one behind the tractor? There are two types of converter dollies. Describe what the trailer air supply control does. be coupled to the rear of a tractor-trailer combination forming a hexagon bottom rig, A coupling device of one or two axles and a fifth wheel by which a semitrailer can be The rear trailer does not have shut-off valves. How much space should be between the upper and lower fifth wheels? Open the shut-off valves at the rear of the last trailer and listen for air flow. Check them all. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. You should keep at least ____ seconds of space ahead of you. Which of the following will occur? 0000001354 00000 n You can find it here: High Road 2.0. They are filled by the emergency (supply) line from the tractor. 0000003998 00000 n Trailer Air Tanks And Shutoff Valves - TruckingTruth A D Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? Charge the system and pump the brakes with the window down. Some do. Email Updates When New Articles Are Posted. B. you need about four times as much stopping distance at 40 mph as at 20 mph 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. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. 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. the road is dry & visibility is good. When coupling twin trailers, a converter dolly is. B. for doubles and triples, the fifth wheel should be all the way towards the tractor The converter dolly air tank drain valve on coupled double/triple trailers should be: You are driving a 100-feet truck with double trailers at 50 mph. Chock the tires, park on level ground and charge the trailer air tank if it does The rear trailer of a triple Each trailer and converter dolly has one or more air tanks. kingpin. Which of these are the correct positions for shut-off valves in doubles and triples? Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. How can you test that air flows to all trailers? If the fifth wheel on a coupling is too far forward, the tractor frame may hit? Air escape from the open valve How should you test the coupling? Which of the following is true about loading cargo into double or triple trailers? DMV Doubles Triples Practice Test | CDL Knowledge Safety should never take second place, so know your stuff! 0000001375 00000 n which of these statements about the handling of doubles and triples is true ? 5. then there is a problem with the ABS system. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). Finsbury Pump Systems 400l (Single Stage) 5.5hp Honda Gx Petrol Engine 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. 0000005664 00000 n To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and B Simply click in your answer to each CDL practice test question. Which of these is most likely to occur? A. release the spring brakes and check for movement C The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. 2003-2023 Chegg Inc. All rights reserved. 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. Converter dolly air tank drain valve: CLOSED. The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. None of the above, 5. When connecting two trailers the converter dolly is connected to the rear trailer first. 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. King pin. Speed for other vehicles is often too fast for a multi-combination unit! You are driving a tractor with multiple trailers. You are driving with double trailers and must use your brakes to avoid a crash. A bent or damaged kingpin on a coupling should be? 0000008894 00000 n They provide the air pressure used to operate trailer brakes. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i.

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