the converter dolly air tank drain valve should be
D Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. They are not only longer, but also need more space because they cannot be turned or stopped suddenly. B Doubles and triples must be driven very smoothly to avoid rollover or jackknife. The Home Depot Logo The road is dry and visibility is good. CDL Doubles and Triples Test Question and Answers The rear trailers shut-off valves should be closed and the front open. The pintle hook? Take special care when pulling two and three trailers. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). They are filled by the emergency (supply) line from the tractor. On a triple combination, the shutoff valves at the rear off the middle trailer should be? symptoms of a bad fuel tank selector switch. You are doing a walkaround inspection of a double or triple trailer rig. It is very important to keep the air supply clean. Doubles Triples Endorsement Test Flashcards | Quizlet The final procedure when connecting a rear trailer is to? Which f these will result in the best control on curves? Slow to the safe speed before entering, then accelerate slightly through the curve. d. protein. 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. A connection device of one axle used to disconnect a semitrailer combination vehicle Good speed management says you should: You must drive through deep or flowing water. HlTo xGf`{iIMh-x||?pbE':X4ZZZRbu7 uvi_RHUkVXBVu{^B3 4e/iw\]RE] YY7i)e V*h(++WQ-]Xm9c5yU6BS" 5HiL,[b)ee:t/ )%BVGpU7T\ZJD Calculate the voltage gain of each. 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. 0000003261 00000 n To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. Only a certified diesel mechanic can check this. When uncoupling a rear trailer, your rig should be parked in a straight line on? A. open the shut-off valves at the rear of both trailers Tips for Backing Up a Trailer Like a Pro Trucker. In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. A A low air buzzer will go off indicating something is wrong and either the front or the Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. The Verge logo. A You should avoid traveling next to others when possible. A-dolly. All ABS equipped units If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. should remain in the closed position. Allow much more space than is needed for ideal driving condition. Open the emergency line shut-off valve at the rear of the last trailer. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. The driver will be required to complete this requirement in three eight hour shifts. Air escape from the open valve A 360 degree area of awareness is The road is dry and visibility is good. What is a converter dolly? | Samsara when does the drivers manual say you should disable the steering axle brakes? With the red knob pushed in on the tractor dash, the service line should have air in it. There is more chance for skids and loss of traction. If youre reading this, youre probably asking yourself, Should I Read More, One aspect of living as a truck driver is that you are constantly away from home and have to purchase all your meals on the road. 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. 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: Often do not have spring brakes Finsbury Pump Systems 400l (Single Stage) 5.5hp Honda Gx Petrol Engine Try our free CDL Doubles and Triples Test Question and Answers Quiz online. utilize the brakes. 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? 0000001956 00000 n Usually need a glad hand converter 0000006836 00000 n 0000010306 00000 n the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com Park on level ground, put chock on the tires, and charge the air tank. B. you need about four times as much stopping distance at 40 mph as at 20 mph Open, latched B. closed It is important not to let water and oil build up in the air tanks. A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. Please visit using a browser with javascript enabled. Follow the procedures described later in this section. Any trailer with a reduced ground clearance You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. B. the emergency line valve open and release air Time limit varies by state. 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. B NPT thumbscrew style design enables easy installation. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. you are driving a 100ft truck eith double trailers at 50mph. This is CDL Doubles and Triples Test 3in our original Classic Mode. 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. kingpin. When does the Driver's manual say you should disable the steering axle brake? locked . Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Go to the rear of second trailer and open the emergency line shut-of valve. C. engaging the tractor valve protection control, You must drive through deep or flowing water. 0000006383 00000 n Nothing, the weight of the trailer will keep it in place, 10. D The rear trailer of a triple The road is dry and visibility is good. Typically depends on the axle count. You will have greater length and more dead axles to pull with your drive axles than other drivers. There is no requirement or exact standard for color coding. When you do this, you should hear: Which of these statements about emergency steering is true? The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. Before you can supply air to the air tanks of a second trailer you need to. This would be very dangerous. If the dolly is a two axle unit then 1 By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. Make sure you can hear air escaping with the valve closed. C. fully raised, Which of these statements about speed management and braking is true? A truckers workspace is a small moving office Read More. If loading fails, click here to try again. 10. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can 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. you should keep atleast __seconds of space ahead of you. 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. None of the above, 4. A Light cords firmly in sockets on trailer. 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. Question 3 Explanation: All of the above. 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. 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 True! Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. Which diagram shows the best way to turn? B. you can almost always stop more quickly than you can turn Hook dolly to front trailer. Make sure pintle hook is latched. Because of this, which of the following vehicle parts is most likely to tip over? Question 4. how much space should be between the upper and lower fifth wheel? when driving a truck with more than one trailer, which trailer should be first behind the truck? But the brakes will hold only as long as there is air pressure in the trailer air tank. You will speak with recruiters today. True or False? 0000001162 00000 n You can reset the test and retake it as needed. 0000002636 00000 n Study section 6.2 if you can't answer all of these questions. A Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? 0000002446 00000 n TestPermit.com provides free unofficial review materials for a variety of exams. A) closed . Either the front or the rear brakes will not work properly or fully. Which is most likely to tip over: C. posted speed limits on curves are safe for all trucks, Empty trucks: 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? The rear trailers shut off valves should be closed and the front open to allow air to the 1. 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. You want to lock your combination to a second trailer that has no spring brakes. It is important to check the height of the trailer before connecting a converter dolly to a trailer. Explore now! When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. re-couple, You can if you want to, it does not matter. That there is no space between upper and lower fifth wheel. Never, 9. What three methods can you use to secure a second trailer before coupling? The road is dry and the visibility is good. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. There are more critical parts to check when you have two or three trailers. Do converter dollies have spring brakes? The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. Be more careful in adverse conditions. In normal operation, trailer service brakes should be operated by? some large trucks have curved (convex or spot) mirrors. A. require shorter stopping distances than full ones The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. D 12, 3. For emergency braking you should: May have poor traction due to bouncing and wheels lockup. 0000003998 00000 n 0000009577 00000 n Each trailer and converter dolly has one or more air tanks. For emergency braking you should: 21 0 obj << /Linearized 1 /O 23 /H [ 1162 213 ] /L 29759 /E 11109 /N 7 /T 29221 >> endobj xref 21 38 0000000016 00000 n Tractor-trailers are considered combination vehicles. you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. 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. which of these statements about managing space to the sides is true? Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Which of these statements about managing space to the sides is true? Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . Safety chains secured to trailer (s). When you do this, you should hear: you are driving with double trailer and must use your brakes to avoid a crash. If there is Use the dummy couplers when the air lines are not connected to a trailer. For all brakes to work on a triple combination, you must have air supply? during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? To help avoid mistakes, colors are sometimes used. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. Air will not be available to release the trailer spring brakes (parking brakes). Flashcards - Doubles Triples Test #3 - FreezingBlue Which of these statements about quick steering movements and doubles/triples is true? When coupling, be sure to couple the proper glad hands together. A. use the engine brake or speed retarder 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. Open More driving knowledge, questions and answers, online practice tests for obtaining a drivers . 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. When you do this, you should hear: Ais escape from the open valve. The lighter trailer should be in the rear. Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. Locking jaws closed on C The air lines will rupture rear trailer. A. always keep your vehicle to the right side of your lane Doubles and triples are extremely prone to control issues and must be B. for doubles and triples, the fifth wheel should be all the way towards the tractor A full trailer behind a truck Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. 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.