None of the above, 4. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. 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. A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. D. Make sure the spare tire is secured, if it has one. Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. 0000005664 00000 n Open the emergency line shut-off valve at the rear of the last trailer. The lightest trailer You should not hear air escaping. good speed management says you should, may have poor traction due to bouncing and wheel lock up. What is one function of the tractor protection valve? We are here to help. Why should you check for when inspecting the converter dolly? 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: That split second that you release the brakes will allow them to match the vehicles road the rig will continue moving in a straight line no matter how much the steering wheel is turned. You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. 0000009577 00000 n Light cords firmly in sockets on trailer. How To Use Cruise Control Effectively As A Truck Driver. What three methods can you use to secure a second trailer before coupling? Then, the air loss from the leak will lower the air tank pressure quickly. Park on level ground, put chock on the tires, and charge the air tank. What value of channel width must the design use? When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? For all brakes to work on a triple combination, you must have air supply? You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. 0000001582 00000 n 9 rear trailer. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. Unlock the pintle hook only if the trailer it is under is loaded, otherwise the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. You should keep at least ____ seconds of space ahead of you. fumoto drain valve. 2 The road is dry and visibility is good. Which is most likely to tip over: The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to C. fully raised, Which of these statements about speed management and braking is true? Leave the emergency line shut-off valve closed and open the service line valve. C. foot pedal, Which of these statements about managing space to the sides is true? You can find it here: High Road 2.0. B. closed kingpin, That there is grease between upper and lower fifth wheel. inspection of all equipment. You are driving a 100-feet truck with double trailers at 50 mph. You are doing a walkaround inspection of a double or triple trailer rig. A vehicle transporting hazardous materials is required to display placards where? You should be sure the converter dolly air tank drain . Seriously! B Eventually, the air will leak away, and then there will be no brakes. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). 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. A the road is dry & visibility is good. 1 C B. slightly open You are doing a walk around inspection of a double or triple trailer rig. Pintle hook latched. 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. At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. Why should you not use the trailer hand valve while driving? DMV Doubles Triples Practice Test | CDL Knowledge If this activity does not load, try refreshing your browser. A. countersteer 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. when does the drivers manual say you should disable the steering axle brakes? B Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. What should you check for when inspecting a converter dolly? When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. You will speak with recruiters today. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. You should avoid traveling next to others when possible. B If you leave this page, your progress will be lost. If the spring brakes do not release when you push the trailer air supply control, check the air line connections. When does the "driver's manual" advise disconnecting the steering axle brakes to help Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can NPT thumbscrew style design enables easy installation. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. When you go to the rear of the last trailer, what should you do to complete this check? Be sure air-lines are supported and glad hands are properly connected. Some areas of concern are discussed below. 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. A. opening the air tank petcock Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. We have a new version of this program. 2023 PA Doubles - Triples CDL Practice Test 3 - CristCDL.com which of these statements about quick steering movements and doubles/triples is true? B Correct answer percentage. second trailer will be connected, The dolly will have a yellow lamp on the left side, The dolly will have a yellow lamp on the right side, The dolly will have a red lamp on the left side, The dolly will have a red lamp on the right side. Chock the tires, park on level ground and charge the trailer air tank if it does A. Which of the following statements about off tracking is true? You MUST have air all the way to the back for all the brakes to work. 0000007487 00000 n The application only takes one minute. The A-dolly has a single drawbar with a single, centered hitching point. The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. When checking your air lines, they must be secure and? Number of wrong answers. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? C. drive through quickly, With the hand valve on, you should test the trailer brakes by opening the service valve line at the rear of the rig. When you do this, you should hear: Which of these statements about emergency steering is true? Calculate the Mach number at section 2. You shouldn't stop braking. 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 360 degree area of awareness is When you do this, you should hear: Becoming A Truck Driver is a dream we've all pondered at some point in our lives. How can you test that air flows to all trailers? Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. That there is some space between the upper and lower fifth wheel. [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." Double and Triples Endorsement Flashcards B. use only the trailer brakes Which of these statements about the handling of doubles and triples is true? Leave a Reply Cancel reply - Free CDL Practice Tests 2022 You are driving a triple trailer and there is a loss of air pressure in the emergency line. How do you check to make sure trailer height is correct before coupling? Open the emergency line shut-off valve at the rear of the last trailer. CDL Doubles and Triples Test Question and Answers Doubles/Triples Endorsement Flashcards | Quizlet Stay up to date on truck driving industry news. B. keep other traffic out of your side space A. require shorter stopping distances than full ones Once you are finished, click the button below. Any trailer, 7. How can you be sure you supplied air to a second trailer? If this lamp is illuminated and does not go out, All rights reserved 2022 TestPermit.com, CDL Doubles and Triples Test Question and Answers, Divided Highway Sign: Meaning, Quiz Definition, Example, Shape, Location, Color, Narrow Bridge Sign: Meaning, Quiz Definition, Example, Shape, Location, Color, STOP Sign 2023 Meaning, Quiz Definition, Example, Shape, Location, Color, Crossbuck Sign: Meaning, Definition, Example, Shape, Location, Color, Georgia CDL Permit Practice Test 2023 Study Guide [PDF], Georgia Motorcycle Permit Test 2023 with Study Guide [PDF], Georgia Permit Test 2023 (DDS Practice Test UPDATED), Georgia ADAP Practice Test 2023 Questions Answers Online, Ohio CDL Permit Practice Test 2023 Study Guide [PDF], Ohio Motorcycle Permit Test 2023 Study Guide [PDF]. open, closed, closed: Term. Question 3 Explanation: All of the above. Converter dollies have spring brakes. you want to hook your combination to a second trailer that has no spring brakes. Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash.
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