the converter dolly air tank drain valve should be the converter dolly air tank drain valve should be

You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? Closed, free, 8. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! . inspection of all equipment. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Slow to the safe speed before entering, then accelerate slightly through the curve. 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. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. 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. securely fastened. This has the same value as the %%SCORE%% Variable on the Final Screen. There is no obligation whatsoever. When testing trailer service brakes, you should use? A. make things look smaller and farther away than they really are during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? Typically depends on the axle count. Have little braking power because they are small Air escape from the open valve How can you be sure you supplied air to a second trailer? _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? Converter dollies: A To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space But the brakes will hold only as long as there is air pressure in the trailer air tank. The dolly will have a yellow lamp on the drivers (left) side. 0000001956 00000 n 12, 3. Hit the article below to see specific information about AOBRDs! cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. Seriously! Correct answer percentage. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. A-dolly. 0000005554 00000 n Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Why should you not use the trailer hand valve while driving? retrovirus $_____________________________$. Which of these statements about quick steering movements and doubles/triples is true? 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. CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. Open 7. You shouldn't stop braking. If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. This is CDL Doubles and Triples Test 3in our original Classic Mode. slow to safe speed before entering, then accelerate slightly through the curve. c. iron The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Light cords firmly in sockets on trailer. This would be very dangerous. B. open; latched The pintle hook? To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds. All other trailer air functions use the emergency line. Visually check to make sure that the rear trailer is slightly lower than the center of the The road is dry and visibility is good. You are driving with double trailers and must use your brakes to avoid a crash. the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. 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. You should reduce your speed by about _____ on a wet road. What is a converter dolly? If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? Each trailer and converter dolly has one or more air tanks. Make a sketch that explains this phenomenon in terms of a feedback loop . The lighter semitrailer should be in first position behind the tractor. air throughout the system. 1/32 to 3/32 of an inch. A 360 degree area of awareness is However, converter dollies and trailers built before 1975 are not required to have spring brakes. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). Doubles and triples are more likely to turn over than other combination vehicles because of what effect? When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. Before you can supply air to the air tanks of a second trailer you need to: Open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of second trailer. 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. Dont hesitate to take advantage of our practice tests in each category specific to your needs. 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. You may not notice a major leak in the service line until you try to put the brakes on. 1 While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. The trailer is at the correct height when. Stay up to date on truck driving industry news. Make sure the converter dolly air tank drain valve is closed. How much space should be between the upper and lower fifth wheels? Why should you use chocks when parking a trailer without spring brakes? 0000003240 00000 n In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. 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. A. hand valve Email Updates When New Articles Are Posted. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. paramount to safe driving. weather passes. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can That there is some space between the upper and lower fifth wheel. Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. You are driving a 100 ft twin trailer combination at 50 mph. This has the same value as the %%TOTAL%% Variable on the Final Screen. 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. The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? 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. Be certain you are clear at the sides before changing lanes. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. To help avoid mistakes, colors are sometimes used. Open, free The Verge logo. Speed for other vehicles is often too fast for a multi-combination unit! fifth wheel, so trailer is raised slightly when dolly is pushed under it. 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. Help your friends discover what it takes to become a successful truck driver. 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. Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. 0000008187 00000 n Trucks with trailers have a dangerous crack-the-whip effect. You can reset the test and retake it as needed. rear brakes will not work properly. You are driving with double trailers and must use your brakes to avoid a crash. True or False? The heavier trailer should be in the rear. All rights reserved Site Map. 0000008894 00000 n A. open the shut-off valves at the rear of both trailers 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 are visually checking the coupling of a converter dolly to the rear trailer. The rear trailers shut-off valves should be closed and the front open. 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? True! Never unlock the pintle hook with the dolly still under the rear trailer. Leave the emergency line shut-off valve closed and open the service line valve. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. Use only the trailer brakes Push the brake pedal as hard as you can and hold it there Hazardous materials must be placarded on all four sides of EACH Trailer. Optional: Leave your email address if you would like a reply: When inspecting doubles or triples, in what position should the air shut-off valves be in? A. The pintle hook should always be secure when the vehicle is in motion. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. You will have greater length and more dead axles to pull with your drive axles than other drivers. 60607. NPT thumbscrew style design enables easy installation. Shut-off valves (also called cut-out cocks) are used in the service and supply air lines at the back of trailers used to tow other trailers. HK Extended Tank Drain Assembly Kit with 10 Inch Braided Steel Hose 1/4 Inch Drain Valve and Elbow Fitting for Air Compressor 4.7 (463) $1499 FREE delivery Thu, Mar 9 on $25 of items shipped by Amazon Small Business All Tool Depot Air Compressor Drain Valve Replacement for Craftsman Petcock 072-0001, 072-0006 (1-Pack) 4.2 (20) $649 There is a school zone ahead. utilize the brakes. It is important to check the height of the trailer before connecting a converter dolly to a trailer. Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. All material on this website is copyrighted. 27. A Go to the rear of second trailer and open the emergency line shut-of valve. They are not only longer, but also need more space because they cannot be turned or stopped suddenly. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. 0000010306 00000 n 0000010705 00000 n Pull gently against them in a low gear to make sure the brakes work. B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out This has the same value as the %%TIME_USED%% Variable on the Final Screen. When does the "driver's manual" advise disconnecting the steering axle brakes to help To do this without wheel chocks you should: When uncoupling the rear semitrailer, you should lower the converter dolly landing gear: When driving a double or triple, you need more space because they: Which of these statements about emergency steering is true? They provide the air pressure used to operate trailer brakes. 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None of the above, 5. Newer trailers have spring brakes just like trucks and truck tractors. Air pressure is sent from the air tanks to the brakes by relay valves. You are doing a walk around inspection of a double or triple trailer rig. D 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. Always unlock the pintle hook with the dolly still under the rear trailer. Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. Explore now! When you do this, you should hear: Which of these statements about emergency steering is true? will have a lamp on the drivers side. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). Never pull any trailer without visually inspecting the fifth wheel locking bar Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). How much space should be between the upper and lower fifth wheel? This section explains how important it is to be careful when driving with more than one trailer, how to couple and uncouple correctly, and about inspecting doubles and triples carefully. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? None of the above, 4. Pintle hook latched. This will let the rear wheels roll again and keep the rear wheels from sliding. None When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. Question 3 Explanation: All of the above. Any trailer with a reduced ground clearance Provides a snug fit to eliminate unwanted seepage of air or water. A full trailer behind a truck Take special care when pulling two and three trailers. For emergency braking you should: Once that's complete, then its an easy push back and the You should check the height of the trailer before connecting a converter dolly to a second or third trailer. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? When inspecting the air brakes on doubles and triples, you wait for air pressure to reach normal, then push in the red trailer air supply knob. Tips for Backing Up a Trailer Like a Pro Trucker. Hit the article to see the way to back up your trailer like a pro! d. protein. Before you can supply air to the air tanks of a second trailer you need to. 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. 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? A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. 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 Open the emergency line shut-off valve at the rear of the last trailer. Visually check to make sure that the lead trailer is slightly higher than the center of The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. Converter dollies have spring brakes. D B 0000001775 00000 n A truckers workspace is a small moving office Read More. Often do not have spring brakes Describe what the trailer air supply control does. You must treat a flashing red signal as you would treat a STOP sign. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. You wish to turn right from one two-lane, two-way street to another. 1/4 in. . 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. By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. Flammable materials in the front trailer then it must have the placards on that trailer. 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. You are doing a walk around inspection of a double or triple trailer rig. Doubles/triples flip flop over from quick steering moves more easily than many vehicles. The A-dolly has a single drawbar with a single, centered hitching point. Charge the system and pump the brakes with the window down. 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. A. use light, steady pressure on the brake pedal We wish you the best of luck in your endeavors and are pleased to be of assistance. If you leave this page, your progress will be lost. 3. 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? you are driving a set of doubles and a set of trailer wheels goes in a skid.