the converter dolly air tank drain valve should be

0000001956 00000 n cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. Open, free You must stop, yield to traffic and pedestrians, and only proceed when safe. A. always keep your vehicle to the right side of your lane How many different ways of coupling and uncoupling trailer combinations are there? How can you test that air flows to all trailers? Light cords firmly in sockets on trailer. These mirrors: make things seem smaller & further away then they really are. Air pressure is sent from the air tanks to the brakes by relay valves. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. 1. The last trailer in a combination is most likely to turn over. 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. Types of converter dollies. how much space should be between the upper and lower fifth wheel? Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. 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. open, closed, closed: Term. A dolly should be pulled out from a rear trailer using? Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. 0000008187 00000 n The emergency line valve open and release air - Converter dolly air tank drain valve: CLOSED. Usually need a glad hand converter Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. Dont hesitate to take advantage of our practice tests in each category specific to your needs. 0000001375 00000 n That there is no space between upper and lower fifth wheel. Do converter dollies have spring brakes? The crack the whip effect that troubles trucks with trailers. Doubles and triples take up more space than other commercial vehicles. You can test that air is flowing to all trailers by opening? Remember however, that is just a suggestion. 0000008894 00000 n 2003-2023 Chegg Inc. All rights reserved. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. a. blood Amazon.com: Air Tank Drain Valve When driving a truck with more than one trailer, which trailer should be first behind the truck? In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. B. you can almost always stop more quickly than you can turn You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. The heaviest trailer What should you check for when inspecting a converter dolly? paramount to safe driving. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. A coupling device of one or two axles and a fifth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? A. require shorter stopping distances than full ones The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. B. you need about four times as much stopping distance at 40 mph as at 20 mph 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested You should keep at least ___ seconds of space ahead of you. C. closed; unlatched, Which of these will result in the best control on a curve? You want to lock your combination to a second trailer that has no spring brakes. There is no obligation whatsoever. You should check the height of the trailer before connecting a converter dolly to a second or third trailer. 9. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? 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 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. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. 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. A 360 degree area of awareness is Typically depends on the axle count. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. Please use the form below to contact our customer service or sales team. A bent or damaged kingpin on a coupling should be? If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. A. open Pickup at South Loop. Have little braking power because they are small Nothing, the weight of the trailer will keep it in place, 10. New! 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. Take special care when pulling two and three trailers. B. keep other traffic out of your side space kingpin, That there is grease between upper and lower fifth wheel. Finsbury Pump Systems 400l (Single Stage) 5.5hp Honda Gx Petrol Engine 27. door. Blue is used for the service lines, and red for the emergency (supply) lines. Flashcards - Doubles Tripes Test #4 - FreezingBlue When checking the fifth wheel, you should make sure that it has enough? They provide the air pressure used to operate trailer brakes. None of the above, 4. The couplers have a rubber seal that prevents air from escaping. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. B. do not need to be checked as often as flat mirrors because they show a larger area At section 1, where the cross-sectional area is 0.02 m2m^{2}m2, the air is at 40.0 kPa (abs), 60C60^{\circ} \mathrm{C}60C, and M=2.0. 0000001775 00000 n You are driving a 100-feet truck with double trailers at 30 mph. 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. Which trailer should come first behind the tractor? It's a fifth wheel, not a sixth wheel. These dollies will have a yellow lamp on the left side of the dolly. How can you be sure you supplied air to a second trailer? 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. The last trailer in a combination is most likely to turn over. C. use controlled or stab braking, The best way to stop any skid is to: Hit the article below to see specific information about AOBRDs! C You should be sure the converter dolly air tank drain . 0000003240 00000 n Once you have coupled your rear trailer, you should test the coupling by? What three methods can you use to secure a second trailer before coupling? Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. On a triple combination, the shutoff valves at the rear off the middle trailer should be? You should avoid traveling next to others when possible. Secure converter gear support in raised position. When driving doubles or triples how should they be driven to avoid rollover or jackknifing: B. restore traction to the tires The emergency brakes come on whenever air pressure in the emergency line is lost. 1/2 to 3/4 of an inch Delivering to. C Use the dummy couplers when the air lines are not connected to a trailer. If the spring brakes do not release when you push the trailer air supply control, check the air line connections. When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? 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 Any trailer with a reduced ground clearance A. open the shut-off valves at the rear of both trailers B. you should avoid traveling next to others whenever possible When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. This would be very dangerous. Which of these statements about managing space to the sides is true? to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. Safety chains secured to trailer (s). Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). the rig will continue moving in a straight line no matter how much the steering wheel is turned. This will supply air to the emergency (supply) lines. retrovirus $_____________________________$. 0000008166 00000 n Push the brake pedal as hard as you can and hold it there not have spring brakes. 2022 DE Doubles - Triples CDL Quick Review 1 - CristCDL.com Sketch the shape of the passage between sections 1 and 2. When coupling, be sure to couple the proper glad hands together. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to Speed for other vehicles is often too fast for a multi-combination unit! High Road 2.0! You must steer gently when pulling trailers. True or False? 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. Doubles/Triples Air Brake Check - digital.ncdcr.gov 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 _____. When the road is slippery 5. Seriously! You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. D Which of the following must be connected when coupling tractor to trailer or trailer to trailer? 0000010783 00000 n Inspecting Doubles And Triples | High Road Online CDL Training When the road is dry Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. you should avoid traveling next to others when possible. 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 3. 6. You should hear air escaping, showing the entire system is charged. D you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. C. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right may still be best, To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Make sure you have large enough gaps before entering or crossing traffic. Each trailer and converter dolly has one or more air tanks. The rear trailer does not have shut-off valves. Lock pintle hook. Older trailers do not have spring brakes. What do you check when making a visual check of coupling? CDL Doubles and Triples Test Question and Answers front of the second trailer. B When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. CDL License Requirements State By State. Air flows steadily and isentropically through a passage. There is a school zone ahead. Their drawbars differentiate them. There is more chance for skids and loss of traction. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. Wait for air pressure to reach normal, then push in the red trailer air supply knob. 1/4 in. B. pull gently against the pin of the second semitrailer 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. 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. D This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. Open the emergency line shut-off valve at the rear of the last trailer. They are filled by the emergency (supply) line from the tractor. you want to hook your combination to a second trailer that has no spring brakes. View More Details. Either the front or the rear brakes will not work properly or fully. good speed management says you should, may have poor traction due to bouncing and wheel lock up. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space Doubles/triples flip flop over from quick steering moves more easily than many vehicles. The lightest trailer C. use stab or controlled braking, Which of these is true? D Visually check to make sure that the rear trailer is slightly lower than the center of the Leave a Reply Cancel reply - Free CDL Practice Tests 2022 fumoto drain valve. When checking your air lines, they must be secure and? C. engaging the tractor valve protection control, You must drive through deep or flowing water. Newer trailers have spring brakes just like trucks and truck tractors. Simply click in your answer to each CDL practice test question. DOUBLE/TRIPLE CDL Flashcards | Chegg.com A) closed . A. use the engine brake or speed retarder Close the emergency line shut-off valve at the rear of the trailer. Charge the system and pump the brakes with the window down. Describe what the trailer air supply control does. None B You are visually checking the coupling of a converter dolly to the rear trailer. For emergency braking you should: May have poor traction due to bouncing and wheels lockup. Which f these will result in the best control on curves? Tractor-trailers are considered combination vehicles. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. recouple. Why is there still destructive interference? If you're pulling more than one trailer, all valves should be open except the very last trailer, which should have all valves in the closed position. Should the shut-off valves on the trailers be open or closed on a set of double trailers? 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C 1. B. closed The service brakes slowly move to the fully applied position D 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 Locking jaws closed on you should check the trailer height before connecting a converter dolly to a second or third trailer. When entering a roundabout, a driver must yield the right-of-way to drivers already in the roundabout and obey all traffic signs. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. TestPermit.com provides free unofficial review materials for a variety of exams. 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. Make sure trailer height is correct. 0000003977 00000 n The application only takes one minute. Disconnect the glad-hand at the front of the first trailer and listen for air flow. Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? The service air line is only used to control the service brakes (when you press on the brake pedal or use the trailer hand-valve). Once that's complete, then its an easy push back and the Air escape from the open valve The road is dry and visibility is good. What is likely to happen? to re-capture it. What types of trailers can get stuck on raised crossings? Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. 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. %PDF-1.2 % A-dolly. 2. The road is dry and visibility is good. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. when driving a truck with more than one trailer, which trailer should be first behind the truck? The individual voltage gains of the first two stages are to be equal, while the gain of the third is to be one-fourth of each of the first two. You should hear air escaping, showing the entire system is charged. On a triple combination, the shutoff valves on the rear of the last trailer should be? You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. fifth wheel, so trailer is raised slightly when dolly is pushed under it. If you do, the brakes may not work correctly. When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. you should keep atleast __seconds of space ahead of you. 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? Converter dolly air tank drain valve: CLOSED. Compressed air usually has some water and some compressor oil in it. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. 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: B 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? 1/32 to 3/32 of an inch. All ABS equipped units Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. Should I Be A Truck Driver? A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. The converter dolly air tank drain valve on coupled double/triple When does the "driver's manual" advise disconnecting the steering axle brakes to help You wish to turn right from one two-lane, two-way street to another. 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? 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. If this activity does not load, try refreshing your browser. Converter dollies are connected to front trailers with a? The shut off valves, when in the open position, allows air to flow out to another trailer. 0000001354 00000 n [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]. CDL Practice Tests 2023 - Doubles And Triples 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. If the dolly is a two axle unit then 1 which of these is not a good thing to do when driving on slippery roads? Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. You are driving a triple trailer and there is a loss of air pressure in the emergency line. 0000004689 00000 n B Pintle hook latched. In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. When you do this, you should hear: Which of these statements about emergency steering is true? These valves permit closing the air lines off when another trailer is not being towed. Do converter dollies have spring brakes? True! Each trailer and converter dolly has one or more air tanks. You should keep at least ____ seconds of space ahead of you. 0000004668 00000 n When uncoupling a rear trailer, your rig should be parked in a straight line on? To check air flows to all trailers, you should let air pressure reach normal then? utilize the brakes. Any trailer, 7. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. 0000001162 00000 n 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 doing a walk around inspection of a double or triple trailer 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 _______. What is one function of the tractor protection valve? Never unlock the pintle hook with the dolly still under the rear trailer. Pull gently against the pin of the second trailer. first check for battery voltage to the valve by probing the wires of the electrical connector with a volt-meter it should be about 10.5 volts if not it's probably bad.next remove the valve. In the coupling system, the locking jaws should be fixed around? Which of these statements about the handling of doubles and triples is true? 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: Park the rear trailer against another trailer, chock the tires and lock the trailer You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? D The Verge logo. All material on this website is copyrighted. 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 the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. 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. The dolly tow bar may fly up Flammable materials in the front trailer then it must have the placards on that trailer. When you're finished, check your score and results. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. 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.

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