the converter dolly air tank drain valve should be

If the converter dolly is close to your semitrailer, you should wheel it into position? When you do this, you should hear: Ais escape from the open valve. What three methods can you use to secure a second trailer before coupling? Open, free The shut off valves, when in the open position, allows air to flow out to another trailer. A bent or damaged kingpin on a coupling should be? The road is dry, and visibility is good. None of the above, 5. Calculate the voltage gain of each. Nothing, the weight of the trailer will keep it in place, 10. Safety chains should be secured to trailer(s). A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Lock pintle hook. and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. Never unlock the pintle hook with the dolly still under the rear trailer. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). Which of these statements about the handling of doubles and triples is true? While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. Visually check to make sure that the rear trailer is slightly lower than the center of the A. open the shut-off valves at the rear of both trailers When you do this, you should hear: Which of these statements about emergency steering is true? You should hear air escaping, showing the entire system is charged. The number and size of air tanks varies among vehicles. 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? When you do this, you should hear: At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. 0000001107 00000 n 9. You will speak with recruiters today. When the road is slippery D Make sure you can hear air escaping with the valve closed. Hook dolly to front trailer. Should the shut-off valves on the rear of the last trailer be open or closed? Make sure you have large enough gaps before entering or crossing traffic. A. make things look smaller and farther away than they really are Hazardous materials must be placarded on all four sides of EACH Trailer. The rear trailers shut-off valves should be open and the front closed. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. 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? If spare tire is carried on converter gear (dolly), make sure it's secured. 0000010783 00000 n B. use only the trailer brakes What's a converter dolly? If the dolly is a two axle unit then 1 B. closed Compressed air usually has some water and some compressor oil in it. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. 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. good speed management says you should, may have poor traction due to bouncing and wheel lock up. The dolly tow bar may fly away, possibly causing panic, and making it very difficult 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. The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. A truckers workspace is a small moving office Read More. Follow the procedures described later in this section. A True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). This has the same value as the %%TOTAL%% Variable on the Final Screen. front of the second trailer. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. The service brakes slowly move to the fully applied position B. johnson bar 0000008187 00000 n 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? Number of wrong answers. Watch the wording of the question AND the answers A safe driver will look for all of the above. 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. Types of converter dollies. 0000008915 00000 n A Slow to the safe speed before entering, then accelerate slightly through the curve. second trailer will be connected, The dolly will have a yellow lamp on the left side, The dolly will have a yellow lamp on the right side, The dolly will have a red lamp on the left side, The dolly will have a red lamp on the right side. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. We are here to help. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? Doubles and triples must be driven very smoothly to avoid rollover or jackknife. The road is dry and visibility is good. When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. Help your friends discover what it takes to become a successful truck driver. More driving knowledge, questions and answers, online practice tests for obtaining a drivers . Make sure trailer height is correct. We have a new version of this program. The last trailer in a combination is most likely to turn over. 0000007487 00000 n Which of these are the correct positions for shut-off valves in doubles and triples? The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. It is very important to keep the air supply clean. 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. In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. %PDF-1.2 % To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. What is a converter dolly? Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? Open. 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. The rear trailer of a triple 0000010705 00000 n 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. 0000004668 00000 n C The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Trucks with trailers have a dangerous crack-the-whip effect. C The dolly tow bar may fly up Join 50,000+ users around America to get your Commercial Driver License today! What will happen if there is a major leak in the service air line? To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space 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. Locking jaws open View More Details. B. are the easiest to stop since there is no shifting cargo to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. If it goes low enough, the trailer emergency brakes will come on. 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: Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. C. use a light touch on the accelerator and brake pedals, For coupled double and triple trailers, all of the converter dolly shut-off valves should be: Which of these statements about managing space to the sides is true? This will supply air to the emergency (supply) lines. Never pull any trailer without visually inspecting the fifth wheel locking bar The lightest trailer a. blood Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. However, converter dollies and trailers built before 1975 are not required to have spring brakes. High Road 2.0! Trailer Air Tanks And Shutoff Valves - Page 50. Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. Why is there still destructive interference? Dont hesitate to take advantage of our practice tests in each category specific to your needs. on kingpin. Converter dolly air tank drain valve: CLOSED. Which of these is NOT a good thing to do when driving on slippery roads? Before coupling a trailer, you should make sure it is at the right height using? Please use the form below to contact our customer service or sales team. These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. A. allow "much more space" than is needed for ideal driving conditions Doubles and triples are more likely to turn over than other combination vehicles because of what effect? In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. When checking the coupling system, make sure that the locking jaws are around the shank of the. 10 Open the shut-off valves at the rear of the last trailer and listen for air flow. What should you check for when inspecting the converter dolly and the pintle hook? Please wait while the activity loads. the trailer will be raised slightly when the converter dolly is backed under it the best way to keep brakes from getting too hot while going down long grades is to : go slow and use only light, steady pressure on the brakes you are driving a 100ft truck with double trailers at 30mph. Open the emergency line shut-off valve at the rear of the last trailer. 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. 2. 0000006015 00000 n 0000001354 00000 n Be more careful in adverse conditions. 11 During normal operation the brakes of the double/triple trailer are controlled by: C. 3, You are doing a walk around inspection of a double or triple trailer rig. There are more critical parts to check when you have two or three trailers. When testing trailer service brakes, you should use? A. countersteer 0000008166 00000 n 0000001775 00000 n Closed, latched 21 0 obj << /Linearized 1 /O 23 /H [ 1162 213 ] /L 29759 /E 11109 /N 7 /T 29221 >> endobj xref 21 38 0000000016 00000 n When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? You are driving with more than one trailer. What three methods can you use to secure a second trailer before coupling? Usually need a glad hand converter These mirrors: Which trailer should come first behind the tractor? cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. Each trailer and converter dolly has one or more air tanks. In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. 4. retrovirus $_____________________________$. Stop the vehicle by gearing down and sparingly A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? You MUST have air all the way to the back for all the brakes to work. fifth wheel, so trailer is raised slightly when dolly is pushed under it. A. release the spring brakes and check for movement Time used (Requires timer add on). The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. In normal operation, trailer service brakes should be operated by? 9 will have a lamp on the drivers side. The heaviest trailer On the first trailer in a set of doubles? CDL License Requirements State By State. Any time you have to If not, there is a problem. 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. When does the Driver's manual say you should disable the steering axle brake? B. for doubles and triples, the fifth wheel should be all the way towards the tractor Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? A-dolly. 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. What three methods can you use to secure a second trailer before coupling? A. require shorter stopping distances than full ones How do you know if your converter dolly is equipped with antilock brakes? That there is no space between upper and lower sixth wheel. You have not finished your quiz. b. cell A. open When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. Studying and applying oneself is the only way to successfully learn the information you need to know to pass all testing required to obtain your CDL. The pintle hook should always be secure when the vehicle is in motion. 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If loading fails, click here to try again. You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. The road is dry and the visibility is good. A converter gear or dolly is a coupling device of one or two axles and a fifth wheel by which a semi-trailer can be coupled to the rear of a tractor-trailer combination forming a double bottom. You shouldn't stop braking. B You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. Before you can supply air to the air tanks of a second trailer you need to. This is CDL Doubles and Triples Test 3in our original Classic Mode. Safety chains secured to trailer (s). You may not notice a major leak in the service line until you try to put the brakes on. With the red knob pushed in on the tractor dash, the service line should have air in it. Opening the shut off valves on the rear most trailer will ensure the lines are flowing A) one inch of space . 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 In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. All other trailer air functions use the emergency line. The pintle hook? 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. Take special care when pulling two and three trailers. For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B If you leave this page, your progress will be lost. ), a 15 year truck driving veteran, in January 2007. Take special care when pulling two and three trailers. The application only takes one minute. Doubles and triples are extremely prone to control issues and must be A 60607. mTouch Quiz will automatically populate the fields below. A. hand valve Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. How much space should be between the upper and lower fifth wheels? Pull gently against the pin of the second trailer. Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. There is no obligation whatsoever. Some do. Be sure air-lines are supported and glad hands are properly connected.

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