If the spring brakes do not release when you push the trailer air supply control, check the air line connections. A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. The road is dry and visibility is good. Make sure trailer height is correct. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. King pin. The road is dry and visibility is good. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. fifth wheel, so trailer is raised slightly when dolly is pushed under it. If there is a trailer If your tractor protection valve doesn't work properly, then if an air hose starts to leak what could happen? 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. Go to the rear of the rig. . 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. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. securely fastened. 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. What should you check for when inspecting a converter dolly - Answers how can you be sure you supplied air to a second trailer? 0000004689 00000 n with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. 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 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. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. Which of these is the correct answer? Sketch the shape of the passage between sections 1 and 2. Use controlled or stab braking D 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; . Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. 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. You are driving a 100 ft twin trailer combination at 50 mph. A. 0000003998 00000 n a. blood A. brake and downshift in a curve Page 1 - Doubles/Triples Test Study Guide for the CDL Calculate the Mach number at section 2. DMV Doubles Triples Practice Test | CDL Knowledge You should look into the back of the fifth wheel on a dolly to see if it is locked onto the kingpin, A safe speed on a curve for a straight truck or a single trailer combination vehicle may be too fast for double or triple trailers. B. releasing the pintle hook The road is dry, and visibility is good. Open D C C You are driving a 100-feet truck with double trailers at 50 mph. 0000001375 00000 n Make sure you do not get in a spot you cannot pull straight through. What three methods can you use to secure a second trailer before coupling? You are doing a walk around inspection of a double or triple trailer rig. The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. There is more chance for skids and loss of traction. The pintle hook? When you do this, you should hear: There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. 0000005554 00000 n 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 Visually check to make sure that the rear trailer is slightly lower than the center of the B Doubles and triples must be driven very smoothly to avoid rollover or jackknife. The trailer is at the correct height when. A) closed . Question 3 Explanation: All of the above. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. B. the emergency line valve open and release air Provides a snug fit to eliminate unwanted seepage of air or water. The service brakes slowly move to the fully applied position Only trailers designed to be pulled with another trailer behind it will have a shut off valve. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? 0000003977 00000 n D kingpin, That there is grease between upper and lower fifth wheel. 3. At section 1, where the cross-sectional area is 0.02 m2m^{2}m2, the air is at 40.0 kPa (abs), 60C60^{\circ} \mathrm{C}60C, and M=2.0. Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . Please wait while the activity loads. Newer trailers have spring brakes just like trucks and truck tractors. This will prevent water and dirt from getting into the coupler and the air lines. The rear trailer of a triple 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. B. closed A. for coupled doubles and triples, be sure that the pintle hook is in the open position If the fifth wheel on a coupling is too far forward, the tractor frame may hit? 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 Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. Doubles/triples flip flop over from quick steering moves more easily than many vehicles. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. 0000009577 00000 n The rear trailer does not have shut-off valves. Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds. A dolly should be pulled out from a rear trailer using? 0000008915 00000 n This is CDL Doubles and Triples Test 3in our original Classic Mode. Trailer Air Tanks And Shutoff Valves - TruckingTruth The pressure in the service line is controlled by the brake pedal and the trailer hand brake. When you're finished, check your score and results. 7. A C. open, except the one connected to the rear trailer should be closed, During normal operation the brakes on double and triple trailers are controlled by the: trailer << /Size 59 /Info 20 0 R /Root 22 0 R /Prev 29211 /ID[] >> startxref 0 %%EOF 22 0 obj << /Type /Catalog /Pages 19 0 R >> endobj 57 0 obj << /S 66 /Filter /FlateDecode /Length 58 0 R >> stream kingpin. They are filled by the emergency (supply) line from the tractor. 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? 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. utilize the brakes. Converter dollies are connected to front trailers with a? In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. D. Make sure the spare tire is secured, if it has one. While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. Secure converter gear support in raised position. You should keep at least ____ seconds of space ahead of you. you are doing a walkaround inspection of a double or triple trailer rig. to re-capture it. [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]. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. Trucks with trailers have a dangerous crack-the-whip effect. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. A sudden movement with the steering wheel can result in a tipping over rear trailer. 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 [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. You must treat a flashing red signal as you would treat a STOP sign. 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. None of the above, 4. The shut off valves, when in the open position, allows air to flow out to another trailer. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. But the brakes will hold only as long as there is air pressure in the trailer air tank. A green traffic light allows the driver to go. We'll help you make the right choices and prepare for a great start to your trucking career. You can reset the test and retake it as needed. These valves permit closing the air lines off when another trailer is not being towed. Only a certified diesel mechanic can check this. These mirrors: Make things seem smaller and further away than they really are. A. always keep your vehicle to the right side of your lane The number and size of air tanks varies among vehicles. Close the emergency line shut-off valve at the rear of the trailer. True! Seriously! 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. What do you check when making a visual check of coupling? You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. Converter dolly air tank drain valve: CLOSED. CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. 0000001107 00000 n What three methods can you use to secure a second trailer before coupling? If it goes low enough, the trailer emergency brakes will come on. Related Question Question: What does this sign mean? If this activity does not load, try refreshing your browser. Compressed air usually has some water and some compressor oil in it. When you do this, you should hear: 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. Once you have coupled your rear trailer, you should test the coupling by? Dont hesitate to take advantage of our practice tests in each category specific to your needs. Once you are finished, click the button below. 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. Nothing, the weight of the trailer will keep it in place, 10. 0000007487 00000 n When you do this, you should hear: Which of these statements about emergency steering is true? Florida CDL Handbook | FL CDL Handbook Coupling & Uncoupling for When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? Time used (Requires timer add on). 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. It's a fifth wheel, not a sixth wheel. The application only takes one minute. 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 _____. 0000008894 00000 n Safety chains should be secured to trailer(s). 2023 WV Doubles - Triples CDL Practice Test 1 - CristCDL.com which of these statements about quick steering movements and doubles/triples is true? Watch the wording of the question AND the answers A safe driver will look for all of the above. Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? C Hook dolly to front trailer. Which of these statements about managing space to the sides is true? For emergency braking you should: May have poor traction due to bouncing and wheels lockup. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. A converter dolly is still under the second trailer when you unlock the pintle hook. Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com A) one inch of space . Each tank has a drain valve on it, and you should drain each tank every day. On a triple combination, the shutoff valves on the rear of the last trailer should be? We wish you the best of luck in your endeavors and are pleased to be of assistance. on kingpin. These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. 0000001775 00000 n When does the "driver's manual" advise disconnecting the steering axle brakes to help you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. 0000005664 00000 n you are driving at night and you must dim your headlights for traffic. 3. 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. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. 4. Which diagram shows the best way to turn? How should you test the coupling? Typically depends on the axle count. 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. When inspecting a converter dolly What should you check for? A. allow "much more space" than is needed for ideal driving conditions Why should you check for when inspecting the converter dolly? The emergency brakes come on whenever air pressure in the emergency line is lost. B. do not need to be checked as often as flat mirrors because they show a larger area Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. The crack the whip effect that troubles trucks with trailers. Hit the article below to see specific information about AOBRDs! speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. Eventually, the air will leak away, and then there will be no brakes. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). Make sure you have large enough gaps before entering or crossing traffic. 0000010285 00000 n Types of converter dollies. C Park the rear trailer against another trailer, chock the tires and lock the trailer Email Updates When New Articles Are Posted. How can you be sure you supplied air to a second trailer? If the dolly is a two axle unit then 1 What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? You are driving a triple trailer and there is a loss of air pressure in the emergency line. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. Open. The converter dolly is an auxiliary axle with a coupling device. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. A. use light, steady pressure on the brake pedal While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. CDL Doubles & Triples Practice Test 3 - Classic Mode - Trucker Country Their drawbars differentiate them. You are driving a tractor with multiple trailers. That there is no space between upper and lower sixth wheel. 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? There is no obligation whatsoever. TestPermit.com provides free unofficial review materials for a variety of exams. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. What is a converter dolly? | Samsara 12, 3. when driving a truck with more than one trailer, which trailer should be first behind the truck? Doubles and triples must be driven very smoothly to avoid rollover or jacknife. C. engaging the tractor valve protection control, You must drive through deep or flowing water. 0000009556 00000 n can and will get stuck on a raised railroad crossing. Blue is used for the service lines, and red for the emergency (supply) lines. When testing trailer service brakes, you should use? Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? 9 That there is some space between the upper and lower fifth wheel. B. are the easiest to stop since there is no shifting cargo open, closed, closed: Term. to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. 1. Unless you are draining the condensation out of the air tank, then the drain valve A. completely open How do you know if your converter dolly is equipped with antilock brakes? The heavier trailer should be in the rear. A. fully lowered Ship to Store. You wish to turn right from one two-lane, two-way street to another. Slow to the safe speed before entering, then accelerate slightly through the curve. door. The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. 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. and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. D There are more critical parts to check when you have two or three trailers. Which of these is most likely to occur? If the converter dolly is close to your semitrailer, you should wheel it into position? A Do converter dollies have spring brakes? The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. Locking jaws closed on dress gifs. The rear trailers shut off valves should be closed and the front open to allow air to the B Go to the rear of second trailer and open the emergency line shut-of valve. Charge the system and pump the brakes with the window down. The dolly tow bar may fly away, possibly causing panic, and making it very difficult Any trailer, 7. Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. Why is there still destructive interference? converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can Make sure to visually inspect the fifth wheel and that the locking mechanism is A. open the shut-off valves at the rear of both trailers They provide the air pressure used to operate trailer brakes. 0000006836 00000 n 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: What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? Which of these are the correct positions for shut-off valves in doubles and triples? With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. If you crossed the air lines, you could drive away, but you would not have trailer brakes. 1 Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. Flashcards - Doubles Tripes Test #4 - FreezingBlue 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: 3. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. Take special care when pulling two and three trailers. Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. Stop the vehicle by gearing down and sparingly Wait for air pressure to reach normal, then push in the red trailer air supply knob. 1. 10 The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. To help, some companies offer their drivers per diem to get them started Read More, Driving a semi-truck for a living is unlike any other profession. 0000010705 00000 n Double and Triples Endorsement Flashcards B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out B. Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. B. johnson bar Chock the tires, park on level ground and charge the trailer air tank if it does In the coupling system, the locking jaws should be fixed around? Often do not have spring brakes There is no requirement or exact standard for color coding. Should the shut-off valves on the trailers be open or closed on a set of double trailers? Ideal for replacing a worn, leaky drain valve on a compressor. These mirrors: 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. The pressure in the service line tells how much pressure the relay valves should send to the trailer brakes. None of the above, 5. The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. Each trailer and converter dolly has one or more air tanks. PDF Doubles and triples 1. The stopping distance for a tractor trailer Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? should remain in the closed position. To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. You are driving with double trailers and must use your brakes to avoid a crash. You can also reach us at (888) 830-2326. Pull gently against them in a low gear to make sure the brakes work. When checking your air lines, they must be secure and? Hit the article to see the way to back up your trailer like a pro! This would be very dangerous. symptoms of a bad fuel tank selector switch. Go to Section 4: Other Topics This question is in Section 4: Other Topics of our CDL Test Guide. 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.