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When you do this, you should hear: Pickup at South Loop. You are doing a walk around inspection of a double or triple trailer rig. open, closed, closed: Term. C 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? 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. When uncoupling a rear trailer, your rig should be parked in a straight line on? fifth wheel, so trailer is raised slightly when dolly is pushed under it. They are filled by the emergency (supply) line from the tractor. You have not finished your quiz. You should avoid traveling next to others when possible. When you do this, you should hear: Ais escape from the open valve. Pull gently against them in a low gear to make sure the brakes work. This will prevent water and dirt from getting into the coupler and the air lines. The converter dolly air tank drain valve on coupled double and triple trailers should be: A. open B. closed C. partially opened B When inspecting coupled doubles and triples, make sure the pintle hooks are: A. secured to the safety pins B. in the open position C. latched C Which of these is true? C When uncoupling the converter dolly Why should you never unhook the To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. A dolly should be pulled out from a rear trailer using? You will speak with recruiters today. 5. The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. 0000004668 00000 n What's a converter dolly? Dont hesitate to take advantage of our practice tests in each category specific to your needs. Be certain you are clear at the sides before changing lanes. 7. Once you are finished, click the button below. 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 go to the rear of the last trailer, what should you do to complete this check? the converter dolly air tank drain valve on couple double/triple trailers should be: to check if the converter dolly is securely coupled to the rear trailer you should: pull gently against the pin of the second trailer. unsafe slow down even further, or better yet, find a safe haven and park until the Some areas of concern are discussed below. D The road is dry, and visibility is good. Which of the following is true about loading cargo into double or triple trailers? B. releasing the pintle hook To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and to re-capture it. If you're only pulling one trailer, the shut off valves should always be closed or else the air will simply escape out the back of the trailer. Any trailer with a reduced ground clearance Which f these will result in the best control on curves? Before you can supply air to the air tanks of a second trailer you need to. These trailers have no parking brake. 0000006383 00000 n How much space should be between the upper and lower fifth wheel? What three methods can you use to secure a second trailer before coupling? With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. 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 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. They provide the air pressure used to operate trailer brakes. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). It is important to check the height of the trailer before connecting a converter dolly to a trailer. If it goes low enough, the trailer emergency brakes will come on. 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? You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. High Road 2.0! Should I Be A Truck Driver? you are driving a set of doubles and a set of trailer wheels goes in a skid. Why should you not use the trailer hand valve while driving? Doubles and triples must be driven very smoothly to avoid rollover or jacknife. 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 0000001107 00000 n 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. B B. slightly raised However there are some states that allow doubles that are each 48 feet in length. On the first trailer in a set of doubles? how can you be sure you supplied air to a second trailer? safe speed would be 40 MPH. When checking the fifth wheel, you should make sure that it has enough? For emergency braking you should: which of these statements about emergency steering is true? 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? C. fully raised, Which of these statements about speed management and braking is true? All material on this website is copyrighted. Good speed management says you should: You must drive through deep or flowing water. Air escape from the open valve A You are driving a 100 ft twin trailer combination at 50 mph. Any trailer, 7. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. 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, enclose converter dolly air tank drain valves You can also reach us at (888) 830-2326. All of the above, 6. The application only takes one minute. Open the shut-off valves at the rear of the last trailer and listen for air flow. The dolly tow bar may flip up causing bodily injury and making it very difficult to Seriously! Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? 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. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested A. countersteer Make sure pintle hook is latched. Clean the couplers and rubber seals before a connection is made. Pull gently against the pin of the second trailer. Blue is used for the service lines, and red for the emergency (supply) lines. For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. The number of correct answers. How many different ways of coupling and uncoupling trailer combinations are there? To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? The rear trailer of a triple The shut off valves, when in the open position, allows air to flow out to another trailer. A. require shorter stopping distances than full ones You want to lock your combination to a second trailer that has no spring brakes. They are filled by the emergency (supply) line from the tractor. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. C. engaging the tractor valve protection control, You must drive through deep or flowing water. Once that's complete, then its an easy push back and the The rear trailers shut-off valves should be open and the front closed. Wait for air pressure to reach normal, then push in the red trailer air supply knob. That there is some space between the upper and lower fifth wheel. 2. What happens when there is a major leak in the emergency air line? What should you check for when inspecting the converter dolly and the pintle hook? D You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. Take special care when pulling two and three trailers. The last trailer in a combination is most likely to turn over. You are driving with more than one trailer. You will have greater length and more dead axles to pull with your drive axles than other drivers. 0000009556 00000 n 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. Hb```f``b`c``e@ (Q6_* 6. You are driving a 100-feet truck with double trailers at 50 mph. which of these is not a good thing to do when driving on slippery roads? They provide the air pressure used to operate trailer brakes. There is a school zone ahead. For emergency braking you should: Also available in App Store & Google Play. The Verge logo. good speed management says you should, may have poor traction due to bouncing and wheel lock up. All ABS equipped units can and will get stuck on a raised railroad crossing. How can you be sure you supplied air to a second trailer? Allow more following distance. You will speak with recruiters today. symptoms of a bad fuel tank selector switch. Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com C. foot pedal, Which of these statements about managing space to the sides is true? All other trailer air functions use the emergency line. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? Leave a Reply Cancel reply - Free CDL Practice Tests 2022 Never pull any trailer without visually inspecting the fifth wheel locking bar Push the brake pedal as hard as you can and hold it there 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 What is the most common foundation brake found on heavy vehicles? (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. For emergency braking you should: Use controlled or stab braking Converter dollies: Often do not have spring brakes The crack the whip effect that troubles trucks with trailers. 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com Hazardous materials must be placarded on all four sides of EACH Trailer. CDL Doubles & Triples Practice Test 3 - Classic Mode - Trucker Country speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. You must stop, yield to traffic and pedestrians, and only proceed when safe. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. Safety chains should be secured to trailer(s). To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space Open, latched Speed for other vehicles is often too fast for a multi-combination unit! 0000006195 00000 n B. the emergency line valve open and release air Related Question Question: What does this sign mean? 4. Converter dolly air tank drain valve: CLOSED. By clicking the ["Send"] button, you agree to our Terms of Use and Privacy Policy, and to the use of cookies described therein, and you also consent to the collection, storage, and processing of your data in the United States where the level of data protection may be different from that in your country. Seriously! behind the shut-off valve then they need to remain open. If the dolly is a two axle unit then 1 How should the converter dolly air tank drain valve on coupled double The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. you are driving a 100ft truck eith double trailers at 50mph. Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. A. you can steer more quickly and safely if you hold the wheel with one hand Please visit using a browser with javascript enabled. 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 inspecting a converter dolly What should you check for? Email Updates When New Articles Are Posted. This has the same value as the %%WRONG_ANSWERS%% Variable on the Final Screen. you are doing a walkaround inspection of a double or triple trailer rig. When the road is slippery Correct answer percentage. If not, there is a problem. The rear trailers shut off valves should be closed and the front open to allow air to the Some large trucks have curved (convex or spot) mirrors. 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. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. 0000003261 00000 n What will happen if there is a major leak in the service air line? C. close the shut-off valves at the rear of the first trailer and open the shut-off valves at the rear of the second trailer, To check that the converter dolly is securely coupled to the rear trailer, you should: On a triple combination, the shutoff valves at the rear off the middle trailer should be? Trailer Air Tanks And Shutoff Valves - TruckingTruth A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. 0000005733 00000 n Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? 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. Delivering to. Be more careful in adverse conditions. C. use controlled or stab braking, The best way to stop any skid is to: Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? 0000007508 00000 n How should you test the coupling? 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.