then there is a problem with the ABS system. Pull gently against them in a low gear to make sure the brakes work. C. use controlled or stab braking, The best way to stop any skid is to: You are driving a 100-feet truck with double trailers at 50 mph. Any trailer, 7. A) one inch of space . The converter dolly air tank drain valve on coupled double/triple Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. During normal operation the brakes of the double/triple trailer are controlled by: You are driving at night and you must dim your headlights for traffic. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. The final procedure when connecting a rear trailer is to? Simply click in your answer to each CDL practice test question. C Open, latched Question 4. The heavier trailer should be in the rear. How much space should be between the upper and lower fifth wheel? 5. Never, 9. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. On a triple combination, the shutoff valves on the rear of the last trailer should be? For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. Visually check to make sure that the rear trailer is slightly lower than the center of the True or False? Speed for other vehicles is often too fast for a multi-combination unit! C Pintle hook latched. Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for You will speak with recruiters today. %PDF-1.2 % Either the front or the rear brakes will not work properly or fully. 2. will have a lamp on the drivers side. Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. The last trailer in a combination is most likely to turn over. How To Use Cruise Control Effectively As A Truck Driver. 0000003060 00000 n if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. Should I Be A Truck Driver? Before coupling a trailer, you should make sure it is at the right height using? If this lamp is illuminated and does not go out, mTouch Quiz will automatically populate the fields below. a sudden movement with the steering wheel can result in a tipped over rear trailer, you wish to turn right from one two-lane, two-way street to another. When you do this, you should hear: Correct answer percentage. When you turn with the tractor/triple trailer combination the wheels that off-track (cheat) the most are: You should check trailer height before connecting a converter dolly to a second or third trailer. For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B The dolly will have a yellow lamp on the drivers (left) side. If you want to couple a second trailer to your combination vehicle, secure it by using: The crack-the-whip effect that troubles trucks with trailers is most likely to cause a tip over: You are driving on a slippery road during the day. The pintle hook should always be secure when the vehicle is in motion. A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. [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." Visually check to make sure that the lead trailer is slightly higher than the center of That there is no space between upper and lower sixth wheel. how can you be sure you supplied air to a second trailer? Wait for air pressure to reach normal, then push in the red trailer air supply knob. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. The service brakes slowly move to the fully applied position B. the emergency line valve open and release air B A Charge the system and pump the brakes with the window down. You can reset the test and retake it as needed. What is a converter dolly? | Samsara How should the converter dolly air tank drain valve on coupled double 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. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Which trailer should come first behind the tractor? You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. Hb```f``b`c``e@ (Q6_* What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? These trailers have no parking brake. you are doing a walkaround inspection of a double or triple trailer rig. Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. To help avoid mistakes, colors are sometimes used. A. use the engine brake or speed retarder Delivering to. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. Air will not be available to release the trailer spring brakes (parking brakes). Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. Each trailer and converter dolly has one or more air tanks. Optional: Leave your email address if you would like a reply: When inspecting doubles or triples, in what position should the air shut-off valves be in? ADVERTISEMENT ADVERTISEMENT You have not finished your quiz. 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? When testing trailer service brakes, you should use? You should NOT: Do converter dollies have spring brakes? You must steer gently when pulling trailers. CDL: Doubles/Triples Flashcards | Quizlet 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. Follow the procedures described later in this section. A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. C. 3, You are doing a walk around inspection of a double or triple trailer rig. To check air flows to all trailers, you should let air pressure reach normal then? But the brakes will hold only as long as there is air pressure in the trailer air tank. HlTo xGf`{iIMh-x||?pbE':X4ZZZRbu7 uvi_RHUkVXBVu{^B3 4e/iw\]RE] YY7i)e V*h(++WQ-]Xm9c5yU6BS" 5HiL,[b)ee:t/ )%BVGpU7T\ZJD safe speed would be 40 MPH. Hook dolly to front trailer. Closed, free, 8. you are visually checking the coupling of a converter dolly to the rear trailer. Safety chains secured to trailer (s). This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. That there is some space between the upper and lower fifth wheel. Hazardous materials must be placarded on all four sides of EACH Trailer. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. 1/2 to 3/4 of an inch 0000005554 00000 n What should you check for when inspecting a converter dolly - Answers 1. This has the same value as the %%TIME_USED%% Variable on the Final Screen. They are filled by the emergency (supply) line from the tractor. The lighter semitrailer should be in first position behind the tractor. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. D You are driving with double trailers and must use your brakes to avoid a crash. on kingpin. The A-dolly has a single drawbar with a single, centered hitching point. When you do this, you should hear: Ais escape from the open valve. Before you can supply air to the air tanks of a second trailer you need to. You MUST have air all the way to the back for all the brakes to work. Your vehicle is so long that you must swing wide to make the turn. Once that's complete, then its an easy push back and the What three methods can you use to secure a second trailer before coupling? Older trailers do not have spring brakes. When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. The total number of questions. By using this site, you agree to be bound by our Terms of Use, Privacy Policy and Cookie Policy, Copyright 2000-2023 MH Sub I, LLC dba Internet Brands. To do this without wheel chocks you should: When uncoupling the rear semitrailer, you should lower the converter dolly landing gear: When driving a double or triple, you need more space because they: Which of these statements about emergency steering is true? Why should you check for when inspecting the converter dolly? [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]. 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. Definition. Which of the following statements about off tracking is true? You are visually checking the coupling of a converter dolly to the rear trailer. View the full article to see how to set cruise control correctly! The rear trailer of a double Make sure you do not get in a spot you cannot pull straight through. Double/Triple Flashcards | Quizlet re-couple, You can if you want to, it does not matter. On the middle trailer of a set of triples? Locking jaws closed on 11 B 3. Slow to the safe speed before entering, then accelerate slightly through the curve. You are driving a 100 ft twin trailer combination at 50 mph. Trailer Parts Superstore - How Air Brakes Work - Eastern Marine If the dolly is a two axle unit then 1 Doubles/Triples Endorsement Flashcards | Quizlet The application only takes one minute. A. hand valve Watch the wording of the question AND the answers A safe driver will look for all of the above. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? Should the shut-off valves on the trailers be open or closed on a set of double trailers? When driving doubles or triples how should they be driven to avoid rollover or jackknifing: Doubles Triples Endorsement Test Flashcards | Quizlet 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: the road is dry & visibility is good. A Any trailer with a reduced ground clearance What is a converter dolly? Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? Open the emergency line shut-off valve at the rear of the last trailer. 0000008915 00000 n The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. 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. Any single vehicle with a GVWR of 26,001 or more pounds, or any such vehicle towing another not in excess of 10,000 pounds. Lock pintle hook. when does the drivers manual say you should disable the steering axle brakes? The number and size of air tanks varies among vehicles. If spare tire is on converter gear (dolly), make sure it is secured. Time limit varies by state. 0000007508 00000 n 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 _______. How can you test that air flows to all trailers? On double and triple combinations, you must make sure that which of these is secure? and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. 1/4 in. Usually need a glad hand converter You should keep at least ____ seconds of space ahead of you. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? . utilize the brakes. Stay up to date on truck driving industry news. 1. King pin. Any items you have not completed will be marked incorrect. Good speed management says you should: You must drive through deep or flowing water. Seriously! A. for coupled doubles and triples, be sure that the pintle hook is in the open position Slow to the safe speed before entering, then accelerate slightly through the curve. Tips for Backing Up a Trailer Like a Pro Trucker. 0000008166 00000 n 0000008187 00000 n You are driving a 100-feet truck with double trailers at 30 mph. B. C coupled to the rear of a tractor-trailer combination forming a double bottom rig, A coupling device of one or two axles and a sixth wheel by which a semitrailer can be If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). Email Updates When New Articles Are Posted. Please visit using a browser with javascript enabled. More driving knowledge, questions and answers, online practice tests for obtaining a drivers . Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). When uncoupling a rear trailer, you should remove some weight from the dolly by? You are doing a walk around inspection of a double or triple trailer 0000004689 00000 n Open the emergency line shut-off valve at the rear of the last trailer. It's a fifth wheel, not a sixth wheel. Only trailers designed to be pulled with another trailer behind it will have a shut off valve. If you leave this page, your progress will be lost. A) closed . 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. If spare tire is carried on converter gear (dolly), make sure it's secured. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? D You should keep at least ___ seconds of space ahead of you. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. What will happen if there is a major leak in the service air line? The trailer brakes will unlock Mar 2 - Mar 3. In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. The emergency brakes come on whenever air pressure in the emergency line is lost. We've all wondered if the adventure and challenges of life on the open road would suit us better than the ordinary day to day lives we've always known. 0000004668 00000 n 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. If there is 10. 9. 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. Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. What three methods can you use to secure a second trailer before coupling? Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. CDL Practice Tests 2023 - Doubles And Triples What does the Driver's manual say about how much space you should keep ahead of your truck? Never pull any trailer without visually inspecting the fifth wheel locking bar What is a converter dolly? 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. B The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Explore now! If one air system is very low on pressure _______. All trademarks are property of their respective owners. Why is there still destructive interference? 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. Flammable materials in the front trailer then it must have the placards on that trailer. A sudden movement with the steering wheel can result in a tipping over rear trailer. 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. 0000001775 00000 n 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. c. iron 0000005664 00000 n There is a school zone ahead. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? None of the above, 2. These mirrors: Make things seem smaller and further away than they really are. you are driving on a slippery road during the day. 0000008894 00000 n 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. Converter dollies have spring brakes. These valves permit closing the air lines off when another trailer is not being towed. What does the drivers manual say about how much space you should keep ahead of your truck? B Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. This would be very dangerous. Time allowed (Requires timer add on). C. posted speed limits on curves are safe for all trucks, Empty trucks: axle will have spring brakes due to the weight of the unit. The rear trailers shut-off valves should be closed and the front open. CDL Doubles & Triples Practice Test 3 - Classic Mode - Trucker Country In an application in which vGS=vDS=Vsupply=1.8V,v_{G S}=v_{D S}=V_{\text { supply }}=1.8 \mathrm{V},vGS=vDS=Vsupply=1.8V, a drain current of 2 mA is required of a device of minimum length of 0.18m.0.18 \mu \mathrm{m}.0.18m. 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 Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. None of the above, 5. A. completely open B. releasing the pintle hook C While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. When checking the fifth wheel, you should make sure that it has enough? Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. That there is no space between upper and lower fifth wheel. C Our business address is: Attn: Class A Drivers MH Sub I, LLC dba Internet Brands 909 N Pacific Coast Highway, 11th Floor El Segundo, CA 90245. The number of correct answers. When you do this, you should hear: A. allow "much more space" than is needed for ideal driving conditions 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out 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 to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? Be sure air-lines are supported and glad hands are properly connected. 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. Park the rear trailer against another trailer, chock the tires and lock the trailer All rights reserved Site Map. your vehicle is so long that you must swing wide to make a turn.