Question 3 Explanation: All of the above. If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. Each trailer and converter dolly has one or more air tanks. 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. The dolly tow bar may fly up How do you check to make sure the trailer height is correct before coupling? A converter dolly is still under the second trailer when you unlock the pintle hook. The rear trailers shut-off valves should be open and the front closed. a. blood 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. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. When uncoupling a rear trailer, your rig should be parked in a straight line on? 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. There is no requirement or exact standard for color coding. ), a 15 year truck driving veteran, in January 2007. Pickup at South Loop. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. A full trailer behind a truck Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for 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. What is a converter dolly? | Samsara Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. Air pressure is sent from the air tanks to the brakes by relay valves. King pin. 5. 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. 4. You should be sure the converter dolly air tank drain . You can also reach us at (888) 830-2326. 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. Submit your email at the end of the test. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). Use the engine brake or speed retarder. 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. countersteer While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. For emergency braking you should: 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com The road is dry and the visibility is good. Never unlock the pintle hook with the dolly still under the rear trailer. Converter dolly air tank drain valve: CLOSED. C What three methods can you use to secure a second trailer before coupling? Open. B. open; latched Watch the wording of the question AND the answers A safe driver will look for all of the above. the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. You want to lock your combination to a second trailer that has no spring brakes. Which of the following will occur? The lighter semitrailer should be in first position behind the tractor. 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. [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]. A. always keep your vehicle to the right side of your lane A) closed . Why is there still destructive interference? How do you check to make sure trailer height is correct before coupling? When checking the coupling system, make sure that the locking jaws are around the shank of the. Study section 6.2 if you can't answer all of these questions. your vehicle is so long that you must swing wide to make a turn. Chock the tires, park on level ground and charge the trailer air tank if it does On a triple combination, the shutoff valves at the rear off the middle trailer should be? Follow the procedures described later in this section. We are an independent company focused on providing valuable motor vehicle and permit practice test information. All material on this website is copyrighted. 0000004668 00000 n Slow to the safe speed before entering, then accelerate slightly through the curve. 10 Make sure to visually inspect the fifth wheel and that the locking mechanism is 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. Light cords firmly in sockets on trailer. Charge the system and pump the brakes with the window down. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. Do converter dollies have spring brakes? However, converter dollies and trailers built before 1975 are not required to have spring brakes. You are driving a 100-feet truck with double trailers at 30 mph. Air flows steadily and isentropically through a passage. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. You can reset the test and retake it as needed. Which is most likely to tip over: behind the shut-off valve then they need to remain open. If you feel Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? 9 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're trying to correct a drive-wheel braking skid why should you 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. The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Please use the form below to contact our customer service or sales team. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). D Hazardous materials must be placarded on all four sides of EACH Trailer. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? Each tank has a drain valve on it, and you should drain each tank every day. Calculate the net energy change in kilojoules per mole that takes place on formation of MgF2_22(s) from the elements: Heat of sublimation for Mg(s) = 147.7 kJ/mol Eea_{ea}ea for F(g) = -328 kJ>mol, Bond dissociation energy for F2_22(g) = 158 kJ>mol Ei1_{i1}i1 for Mg(g) = 737.7 kJ>mol, Electrostatic interactions in MgF2_22(s) = -2957 kJ/mol Ei2_{i2}i2 for Mg(g) = 1450.7 kJ/mol. If spare tire is on converter gear (dolly), make sure it is secured. D 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? inspection of all equipment. Before you can supply air to the air tanks of a second trailer you need to. A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. 1 C. use controlled or stab braking, The best way to stop any skid is 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. You will have greater length and more dead axles to pull with your drive axles than other drivers. These valves permit closing the air lines off when another trailer is not being towed. 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. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. Leave a Reply Cancel reply - Free CDL Practice Tests 2022 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. When you do this, you should hear: Which of these statements about emergency steering is true? They provide the air pressure used to operate trailer brakes. When coupling twin trailers, a converter dolly is. 0000008166 00000 n A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed A. air escape from the open valve Doubles Triples Endorsement Test Flashcards | Quizlet when does the drivers manual say you should disable the steering axle brakes? 60607. When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. c. iron If this lamp is illuminated and does not go out, Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. For emergency braking you should: B 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. 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. Which of these statements about quick steering movements and doubles/triples is true? B. closed Open, free A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. Simply click in your answer to each CDL practice test question. you are driving at night and you must dim your headlights for traffic. you are visually checking the coupling of a converter dolly to the rear trailer. We are here to help. utilize the brakes. 0000005664 00000 n Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. C. foot pedal, Which of these statements about managing space to the sides is true? 0000004689 00000 n If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? open, closed, closed: Term. C A. you can steer more quickly and safely if you hold the wheel with one hand Double and Triples Part 1 Flashcards - flashcardmachine.com They are not only longer, but also need more space because they cannot be turned or stopped suddenly. Only a certified diesel mechanic can check this. The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. A turn of the glad hand attached to the hose will join and lock the couplers. C The rear trailers shut-off valves should be closed and the front open. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. A bent or damaged kingpin on a coupling should be? 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. Park the rear trailer against another trailer, chock the tires and lock the trailer B. restore traction to the tires 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; . 5. NPT thumbscrew style design enables easy installation. Eventually, the air will leak away, and then there will be no brakes. 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PDF Doubles and triples 1. The stopping distance for a tractor trailer A Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. If loading fails, click here to try again. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. [Flashing Signals, Traffic Signals, Chapter 5 - Signals, Signs and Pavement Markings, North Carolina Driver's Handbook], One component of the DUI sentence in the state of Tennessee is twenty-four hours of litter pick-up wearing clothing that says "I am a drunk driver." Remember however, that is just a suggestion. Any items you have not completed will be marked incorrect. If this activity does not load, try refreshing your browser. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. If there is air there, then there is air towards the cab You want to hook up to the first trailer, then the converter dolly while it is lined up in 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. safe speed would be 40 MPH. These trailers have no parking brake. rear trailer. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. C This has the same value as the %%SCORE%% Variable on the Final Screen. Converter dollies are connected to front trailers with a?
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