the converter dolly air tank drain valve should be

0000006015 00000 n These valves permit closing the air lines off when another trailer is not being towed. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. 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. Allow more following distance. The dolly tow bar may flip up causing bodily injury and making it very difficult to Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. You should hear air escaping, showing the entire system is charged. 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 This will let the rear wheels roll again and keep the rear wheels from sliding. your vehicle is so long that you must swing wide to make a turn. D 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. you are doing a walkaround inspection of a double or triple trailer rig. Definition. By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. What three methods can you use to secure a second trailer before coupling? Doubles and triples must be driven very smoothly to avoid rollover or jackknife. 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. What value of channel width must the design use? kingpin, That there is grease between upper and lower fifth wheel. The lighter semitrailer should be in first position behind the tractor. 10 The rear trailer of a triple what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? In normal operation, trailer service brakes should be operated by? If this lamp is illuminated and does not go out, TestPermit.com is not affiliated, endorsed, or sponsored by state agencies or any motor vehicle and any other departments in the United States, Canada, UK. Types of converter dollies. With the red knob pushed in on the tractor dash, the service line should have air in it. Which of these is the correct answer? Which of these statements about quick steering movements and doubles/triples is true? In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. you should avoid traveling next to others when possible. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. You should keep at least ___ seconds of space ahead of you. You should keep at least ____ seconds of space ahead of you. C All other trailer air functions use the emergency line. The service brakes slowly move to the fully applied position Pintle hook latched. Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. 0000010783 00000 n A Doubles and triples are more likely to turn over than other combination vehicles because of what effect? What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? B C. fully raised, Which of these statements about speed management and braking is true? Hit the article to see the way to back up your trailer like a pro! If you do, the brakes may not work correctly. HlTo xGf`{iIMh-x||?pbE':X4ZZZRbu7 uvi_RHUkVXBVu{^B3 4e/iw\]RE] YY7i)e V*h(++WQ-]Xm9c5yU6BS" 5HiL,[b)ee:t/ )%BVGpU7T\ZJD If you do, there is a problem. You are visually checking the coupling of a converter dolly to the rear trailer. How can you test that air flows to all trailers? 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. When you're finished, check your score and results. some large trucks have curved (convex or spot) mirrors. 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. Describe what the trailer air supply control does. you are visually checking the coupling of a converter dolly to the rear trailer. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. Seriously! The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. 0000004668 00000 n 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? 0000001162 00000 n Which of the following will occur? Why should you not use the trailer hand valve while driving? You need to brake in order to regain control. You should be sure the converter dolly air tank . You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. You want to lock 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? 0000001956 00000 n which of these is not a good thing to do when driving on slippery roads? 3. B Therefor, if there is a major leak in your service line, you may not know it until you try to use the service brake. C This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. can and will get stuck on a raised railroad crossing. C. posted speed limits on curves are safe for all trucks, Empty trucks: You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. Never, 9. which of these statements about quick steering movements and doubles/triples is true? D Try our free CDL Doubles and Triples Test Question and Answers Quiz online. Select the answer that correctly completes each statement. 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. 2003-2023 Chegg Inc. All rights reserved. You should keep at least _____ seconds of space ahead of you. c. iron A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. You are driving a 100-feet truck with double trailers at 50 mph. A. use a low gear Therefore, look far ahead so you can slow down or change lanes gradually when necessary. What three methods can you use to secure a second trailer before coupling? Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. If spare tire is carried on converter gear (dolly), make sure it's secured. Which of these is most likely too occur? You are driving with double trailers and must use your brakes to avoid a crash. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. 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. 6. If the air supply in the trailer air tank has leaked away, there will be no emergency brakes, and the trailer wheels will turn freely. Correct answer percentage. Study section 6.2 if you can't answer all of these questions. There is no obligation whatsoever. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: Which of the following is true about loading cargo into double or triple trailers? 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? Make sure you do not get in a spot you cannot pull straight through. Ship to Store. 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. 0000005664 00000 n 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. The last trailer in a combination is most likely to turn over. What's a converter dolly? Open the emergency line shut-off valve at the rear of the last trailer. To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and Converter dolly air tank drain valve: CLOSED. and ensuring it is secure. Open. You should keep at least ____ seconds of space 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. inspection of all equipment. You can test that air is flowing to all trailers by opening? Once that's complete, then its an easy push back and the In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. How do you know if your converter dolly is equipped with antilock brakes? Slow to the safe speed before entering, then accelerate slightly through the curve. 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? Doubles/triples flip flop over from quick steering moves more easily than many vehicles. 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? A-dolly. It is important not to let water and oil build up in the air tanks. Doubles and triples must be driven very smoothly to avoid rollover or jacknife. Stay up to date on truck driving industry news. B You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. Time used (Requires timer add on). To help avoid mistakes, colors are sometimes used. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Use the dummy couplers when the air lines are not connected to a trailer. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. C. foot pedal, Which of these statements about managing space to the sides is true? 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? Any vehicle required by federal regulations to be placarded while transporting hazardous materials. The shut off valves prevent air from going any further. Trucks with trailers have a dangerous crack-the-whip effect. On double and triple combinations, you must make sure that which of these is secure? Delivering to. Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. 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; . ), a 15 year truck driving veteran, in January 2007. How should you test the coupling? C. always keep your vehicle to the left side of your lane, When testing the coupling of double trailers, the landing gear of the rear trailer should be: When driving a double or triple trailer, greater care must be given to. Make sure to visually inspect the fifth wheel and that the locking mechanism is After 15 years on the road I wanted to help people understand the trucking industry and everything that came with the career and lifestyle of an over the road trucker. Related Question Question: What does this sign mean? Typically depends on the axle count. The crack the whip effect that troubles trucks with trailers. The rear trailer of a double Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. C. use stab or controlled braking, Which of these is true? 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? The driver will be required to complete this requirement in three eight hour shifts. How To Use Cruise Control Effectively As A Truck Driver. Light cords firmly in sockets on trailer. 0000001354 00000 n Make sure you can hear air escaping with the valve closed. Which of these is NOT a good thing to do when driving on slippery roads? Converter dollies are connected to front trailers with a? When connecting two trailers the converter dolly is connected to the rear trailer first. Please wait while the activity loads. The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. 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: when driving a truck with more than one trailer, which trailer should be first behind the truck? Converter dolly air tank drain valve: CLOSED. The rear trailers shut off valves should be closed and the front open to allow air to the However, converter dollies and trailers built before 1975 are not required to have spring brakes. Once you are finished, click the button below. 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. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space B. restore traction to the tires View More Details. the rig will continue moving in a straight line no matter how much the steering wheel is turned. Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. These mirrors: make things seem smaller & further away then they really are. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to For emergency braking you should: which of these statements about emergency steering is true? 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. What do you check when making a visual check of coupling? A. for coupled doubles and triples, be sure that the pintle hook is in the open position Each tank has a drain valve on it, and you should drain each tank every day. Locking jaws closed on A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? 0000004689 00000 n D. Make sure the spare tire is secured, if it has one. What three methods can you use to secure a second trailer before coupling? Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. Which of these are the correct positions for shut-off valves in doubles and triples? When the road is slippery A. you can steer more quickly and safely if you hold the wheel with one hand Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. In double and triple trailers, the trailer air supply control should pop or _________ when air pressure drops into the range of 20 to 45 psi. B Locking jaws closed on b. cell 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. You are doing a walk around inspection of a double or triple trailer rig. Sketch the shape of the passage between sections 1 and 2. True! Be certain you are clear at the sides before changing lanes. 1. All material on this website is copyrighted. door. If you leave this page, your progress will be lost. 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. 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: You should NOT: B. you need about four times as much stopping distance at 40 mph as at 20 mph The emergency line valve open and release air The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. B. you can almost always stop more quickly than you can turn The pressure in the service line is controlled by the brake pedal and the trailer hand brake. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? The dolly tow bar may fly up When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. The road is dry and the visibility is good. recouple. Check them all. The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. Some large trucks have curved (convex or spot) mirrors. B Be more careful in adverse conditions. The air lines will rupture Once you have coupled your rear trailer, you should test the coupling by? 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. C. closed, You can release the dolly brakes by: You are driving a 100 ft twin trailer combination at 50 mph. The A-dolly has a single drawbar with a single, centered hitching point. Doubles and triples take up more space than other commercial vehicles. They are filled by the emergency (supply) line from the tractor. 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. These valves permit closing the air lines off when another trailer is not being towed. you are driving on a slippery road during the day. What is likely to happen? Air flows steadily and isentropically through a passage. You wish to turn right from one two-lane, two-way street to another. 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?

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