A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. The trailer is at the correct height when. 0000008915 00000 n Any items you have not completed will be marked incorrect. B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out you are visually checking the coupling of a converter dolly to the rear trailer. [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]. The road is dry and the visibility is good. What types of trailers can get stuck on raised crossings? 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, enclose converter dolly air tank drain valves Any trailer with a reduced ground clearance The rear trailer of a triple All rights reserved Site Map. A. for coupled doubles and triples, be sure that the pintle hook is in the open position In an application in which vGS=vDS=Vsupply=1.8V,v_{G S}=v_{D S}=V_{\text { supply }}=1.8 \mathrm{V},vGS=vDS=Vsupply=1.8V, a drain current of 2 mA is required of a device of minimum length of 0.18m.0.18 \mu \mathrm{m}.0.18m. symptoms of a bad fuel tank selector switch. Always unlock the pintle hook with the dolly still under the rear trailer. At section 2 downstream, the speed is 519 m/s. A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. The weight of the individual trailers will have no noticeable effect on the handling of the vehicle, The weight of all trailers should be nearly the same, within 2% of each other. In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. All of the above, 6. 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; . Only a certified diesel mechanic can check this. What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? The road is dry and the visibility is good. axle will have spring brakes due to the weight of the unit. Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. Please visit using a browser with javascript enabled. 11 During normal operation the brakes of the double/triple trailer are controlled by: Please use the form below to contact our customer service or sales team. You should NOT: If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? 0000010705 00000 n What do you check when making a visual check of coupling? What is one function of the tractor protection valve? Try our free CDL Doubles and Triples Test Question and Answers Quiz online. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). All material on this website is copyrighted. and the converter dolly air tank drain valve should be _____. If there is a trailer When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. The dolly tow bar may fly away, possibly causing panic, and making it very difficult Which of these are the correct positions for shut-off valves in doubles and triples? _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. D You are driving a 100 ft twin trailer combination at 50 mph. What does the drivers manual say about how much space you should keep ahead of your truck? Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Once you have coupled your rear trailer, you should test the coupling by? None When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? 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. B. are the easiest to stop since there is no shifting cargo Visually check to make sure that the lead trailer is slightly higher than the center of 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: When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? B. you need about four times as much stopping distance at 40 mph as at 20 mph If this activity does not load, try refreshing your browser. B Which of the following is true about loading cargo into double or triple trailers? You are doing a walk around inspection of a double or triple trailer rig. You are driving a triple trailer and there is a loss of air pressure in the emergency line. B. pull gently against the pin of the second semitrailer Open, free You should not hear air escaping. Open the emergency line shut-off valve at the rear of the last trailer. 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 What's a converter dolly? Pull gently against the pin of the second trailer. They are filled by the emergency (supply) line from the tractor. The last trailer in a combination is most likely to turn over. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Hb```f``b`c``e@ (Q6_* B 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. That there is no space between upper and lower fifth wheel. What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? How do you check to make sure trailer height is correct before coupling? Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. 0000010285 00000 n You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. Doubles and triples take up more space than other commercial vehicles. Closed, free, 8. If there is C It's a fifth wheel, not a sixth wheel. Safety chains secured to trailer (s). On a triple combination, the shutoff valves at the rear off the middle trailer should be? 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. Which diagram shows the best way to turn? C. add "one car length for every 10 mph", Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Incidental Motions & Motions that Bring a Que. If spare tire is on converter gear (dolly), make sure it is secured. - Converter dolly air tank drain valve: CLOSED. You are driving with double trailers and must use your brakes to avoid a crash. retrovirus $_____________________________$. 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. 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. A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. 5. . Any trailer, 7. 2. You should be sure the converter dolly air tank drain . You should keep at least ____ seconds of space ahead of you. That there is no space between upper and lower sixth wheel. 3. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). Related Question Question: What does this sign mean? This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? A. use a low gear A While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. Converter dolly air tank drain valve: CLOSED. There is no obligation whatsoever. To help avoid mistakes, colors are sometimes used. The dolly tow bar may fly up If the spring brakes do not release when you push the trailer air supply control, check the air line connections. You should keep at least _____ seconds of space ahead of you: You are driving with double trailers and must use your brakes to avoid a crash. When does the Driver's manual say you should disable the steering axle brake? Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. There is more chance for skids and loss of traction. 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? Which of the following statements about off tracking is true? Open, latched How do you check to make sure the trailer height is correct before coupling? View More Details. For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B 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. D If it goes low enough, the trailer emergency brakes will come on. You need to brake in order to regain control. The rear trailer of a double This means. C. use stab or controlled braking, Which of these is true? You must steer gently when pulling trailers. 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. Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. We wish you the best of luck in your endeavors and are pleased to be of assistance. Open the emergency line shut-off valve at the rear of the last trailer. The dolly tow bar may flip up causing bodily injury and making it very difficult to The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. Park the rear trailer against another trailer, chock the tires and lock the trailer 0000001354 00000 n Close the emergency line shut-off valve at the rear of the trailer. CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. It is important to check the height of the trailer before connecting a converter dolly to a trailer. B. releasing the pintle hook More driving knowledge, questions and answers, online practice tests for obtaining a drivers . Make sure you have large enough gaps before entering or crossing traffic. Hook dolly to front trailer. 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. on kingpin. 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. open ), a 15 year truck driving veteran, in January 2007. If you crossed the air lines, you could drive away, but you would not have trailer brakes. Which is most likely to tip over: You can reset the test and retake it as needed. which of these statements about the handling of doubles and triples is true ? 0000002636 00000 n If one air system is very low on pressure _______. weather passes. You are doing a walk around inspection of a double or triple trailer rig. What does the Driver's manual say about how much space you should keep ahead of your truck? If you leave this page, your progress will be lost. 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 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 emergency brakes come on whenever air pressure in the emergency line is lost. These valves permit closing the air lines off when another trailer is not being towed. Make a sketch that explains this phenomenon in terms of a feedback loop . when testing the coupling of a double trailer the landing gears of the rear trailer should be, you must drive through deep or flowing water . The couplers have a rubber seal that prevents air from escaping. Seriously! Doubles/triples flip flop over from quick steering moves more easily than many vehicles. B A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. Each trailer and converter dolly has one or more air tanks. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). Do converter dollies have spring brakes? You will speak with recruiters today. A. fully lowered King pin. You are driving with more than one trailer. The application only takes one minute. 0000001375 00000 n When you do this, you should hear: rear trailer. B. do not need to be checked as often as flat mirrors because they show a larger area When coupling twin trailers, a converter dolly is. Tips for Backing Up a Trailer Like a Pro Trucker. B. use only the trailer brakes during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? The crack the whip effect that troubles trucks with trailers. 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? Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. Question 4. Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. 0000001162 00000 n c. iron (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. When driving with more than one trailer, which trailer should be the first one behind the tractor? Open the emergency line shut-off valve at the rear of the last trailer. Air valves should be closed on all trailers, Air valves should be open on all trailers, Rear of front trailers: closed, rear of last trailer: open, Rear of front trailers: open, rear of last trailer: closed. What will happen if there is a major leak in the service air line? What happens when there is a major leak in the emergency air line? What do you check when making a visual check of coupling? C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. Clean the couplers and rubber seals before a connection is made. 0000001956 00000 n This would be very dangerous. Watch the wording of the question AND the answers A safe driver will look for all of the above. Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. The topics with which you will want to be expertly familiar are: There isnt as much information to be studied in the classroom or in the CDL manual regarding doubles and triples, so in-lot and on-the-road practice will help you pass this test. The driver will be required to complete this requirement in three eight hour shifts. Which of the following will occur? The service brakes slowly move to the fully applied position You have not finished your quiz.
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