You can test that air is flowing to all trailers by opening? Hb```f``b`c``e@ (Q6_* Doubles and triples take up more space than other commercial vehicles. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Air will not be available to release the trailer spring brakes (parking brakes). mTouch Quiz will automatically populate the fields below. Which of these is most likely too occur? There is a school zone ahead. 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. The A-dolly has a single drawbar with a single, centered hitching point. 2. If this activity does not load, try refreshing your browser. What do you check when making a visual check of coupling? Terms in this set (43) Converter dollies are used to connect: A tractor-trailer combination to another trailer. The rear trailer does not have shut-off valves. 0000010783 00000 n How can you test that air flows to all trailers? When you do this, you should hear: On a triple combination, the shutoff valves at the rear off the middle trailer should be? The crack the whip effect that troubles trucks with trailers. 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? Be more careful in adverse conditions. Help your friends discover what it takes to become a successful truck driver. Their drawbars differentiate them. What should you check for when inspecting a converter dolly? You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. air throughout the system. You should be sure the converter dolly air tank drain . The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. When checking the fifth wheel, you should make sure that it has enough? and the converter dolly air tank drain valve should be _____. Becoming A Truck Driver is a dream we've all pondered at some point in our lives. 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. B In order to supply air to the air tanks of a second trailer, you must ______ shut-off valves at the rear of the first trailer and ________ the shut-off valves at the rear of the second trailer. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. [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." To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and What happens when there is a major leak in the emergency air line? Once that's complete, then its an easy push back and the On a triple combination, the shutoff valves on the rear of the last trailer should be? B. you should avoid traveling next to others whenever possible You should reduce your speed by about _____ on a wet road. We'll help you make the right choices and prepare for a great start to your trucking career. You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. King pin. Open, latched Air escape from the open valve B. allow one vehicle length for every 10,000 lbs of gross vehicle weight 0000010705 00000 n A coupling device of one or two axles and a fifth wheel by which a semitrailer can be coupled to the rear of a tractor-trailer combination forming a double bottom rig Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? Locking jaws closed on 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. 0000010285 00000 n A If you do, there is a problem. good speed management says you should, may have poor traction due to bouncing and wheel lock up. Air escape from the open valve B The service brakes slowly move to the fully applied position C The emergency line valve open and release air D None of the above 4. If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. C Slow to the safe speed before entering, then accelerate slightly through the curve. You are driving with double trailers and must use your brakes to avoid a crash. how can you be sure you supplied air to a second trailer? How much space should be between the upper and lower fifth wheel? To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed. While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? 0000008894 00000 n 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 Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Do converter dollies have spring brakes? Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? What is likely to happen? You should NOT: A connection device of one axle used to disconnect a semitrailer combination vehicle This has the same value as the %%TOTAL%% Variable on the Final Screen. On the middle trailer of a set of triples? It is important to check the height of the trailer before connecting a converter dolly to a trailer. Leave the emergency line shut-off valve closed and open the service line valve. If you leave this page, your progress will be lost. Which of the following is true about loading cargo into double or triple trailers? The lighter trailer should be in the rear. That split second that you release the brakes will allow them to match the vehicles road We wish you the best of luck in your endeavors and are pleased to be of assistance. 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? Air valves should be closed on all trailers, Air valves should be open on all trailers, Rear of front trailers: closed, rear of last trailer: open, Rear of front trailers: open, rear of last trailer: closed. The dolly tow bar may flip up causing bodily injury and making it very difficult to Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. Ensuring the safety of the public starts with a thorough Air flows steadily and isentropically through a passage. 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? In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. Older trailers do not have spring brakes. Hit the article to see the way to back up your trailer like a pro! When checking your air lines, they must be secure and? When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. If you're pulling more than one trailer, all valves should be open except the very last trailer, which should have all valves in the closed position. Safety should never take second place, so know your stuff! They provide the air pressure used to operate trailer brakes. Please wait while the activity loads. Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. 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. symptoms of a bad fuel tank selector switch. Which of these is NOT a good thing to do when driving on slippery roads? How do you know if your converter dolly is equipped with antilock brakes? A. use the engine brake or speed retarder C. engaging the tractor valve protection control, You must drive through deep or flowing water. What will happen if there is a major leak in the service air line? 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. Check them all. Never unlock the pintle hook with the dolly still under the rear trailer. Lock pintle hook. Speed for other vehicles is often too fast for a multi-combination unit! on kingpin. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. You are visually checking the coupling of a converter dolly to the rear trailer. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. you should avoid traveling next to others when possible. Also, this page requires javascript. Trailer Air Tanks And Shutoff Valves - Page 50. during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? 0000007032 00000 n Make sure you can hear air escaping with the valve closed. 0000001582 00000 n You can also reach us at (888) 830-2326. Which of the following must be connected when coupling tractor to trailer or trailer to trailer? It is very important to keep the air supply clean. Shut-off valves (at rear of trailers, in service and emergency lines): When pulling doubles or triples, what is important to know about the order of the trailers? For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. Why should you use chocks when parking a trailer without spring brakes? 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? The lightest 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. Locking jaws closed on You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. Any trailer, 7. C To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. Time used (Requires timer add on). You should keep at least ___ seconds of space ahead of you. A bent or damaged kingpin on a coupling should be? rear trailer. 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 The service brakes slowly move to the fully applied position 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. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). 5. You have not finished your quiz. 0000004668 00000 n Safety chains secured to trailer (s). CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. Once you have coupled your rear trailer, you should test the coupling by? When testing trailer service brakes, you should use? The emergency brakes come on whenever air pressure in the emergency line is lost. Hit the article below to see specific information about AOBRDs! Push the brake pedal as hard as you can and hold it there A. use a low gear True or False? You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. This has the same value as the %%SCORE%% Variable on the Final Screen. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. A You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? Which of these statements about quick steering movements and doubles/triples is true? A 360 degree area of awareness is Which of the following will occur? 27. Email Updates When New Articles Are Posted. 0000009577 00000 n Should the shut-off valves on the rear of the last trailer be open or closed? when does the drivers manual say you should disable the steering axle brakes? Also available in App Store & Google Play. 0000006015 00000 n At section 2 downstream, the speed is 519 m/s. Slow to the safe speed before entering, then accelerate slightly through the curve. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. You are driving with double trailers and must use your brakes to avoid a crash. If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen? To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space This will prevent water and dirt from getting into the coupler and the air lines. You will speak with recruiters today. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? Any vehicle required by federal regulations to be placarded while transporting hazardous materials. 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. Pull gently against them in a low gear to make sure the brakes work. Some do. B. slightly open B. releasing the pintle hook The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. B. the emergency line valve open and release air Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. 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. some large trucks have curved (convex or spot) mirrors. True! None of the above, 5. 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? That there is no space between upper and lower sixth wheel. You need to brake in order to regain control. you are driving a 100ft truck eith double trailers at 50mph. 11 During normal operation the brakes of the double/triple trailer are controlled by: 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. 10. kingpin. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? Make sure pintle hook is 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. 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. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! This has the same value as the %%TIME_USED%% Variable on the Final Screen. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. Make sure the converter dolly air tank drain valve is closed. C. fully raised, Which of these statements about speed management and braking is true? A full trailer behind a truck Visually check to make sure that the rear trailer is slightly lower than the center of the You should keep at least ____ seconds of space ahead of you. 0000007508 00000 n you are driving on a slippery road during the day. 0000003261 00000 n _______ should be tested with the hand valve but controlled in normal operation with the foot pedal. These valves permit closing the air lines off when another trailer is not being towed. Ensuring the safety of the public starts with a thorough inspection of all equipment. If the dolly is a two axle unit then 1 Converter dollies are connected to front trailers with a? [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space C. use stab or controlled braking, Which of these is true? Make sure you have large enough gaps before entering or crossing traffic. . What types of trailers can get stuck on raised crossings? If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? Seriously! Converter dolly air tank drain valve: CLOSED. All rights reserved Site Map. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. 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. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. B. you need about four times as much stopping distance at 40 mph as at 20 mph you are doing a walkaround inspection of a double or triple trailer rig. A The final procedure when connecting a rear trailer is to? When connecting two trailers the converter dolly is connected to the rear trailer first. C D Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? Tips for Backing Up a Trailer Like a Pro Trucker. When uncoupling a rear trailer, you should remove some weight from the dolly by? Wait for air pressure to reach normal, then push in the red trailer air supply knob. They provide the air pressure used to operate trailer brakes. For emergency braking you should: which of these statements about emergency steering is true? Close the emergency line shut-off valve at the rear of the trailer. A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed There are more critical parts to check when you have two or three trailers. S-cam brakes are the most common style brakes on large trucks today. Related Question Question: What does this sign mean? Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? Make a sketch that explains this phenomenon in terms of a feedback loop . A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. What is the most common foundation brake found on heavy vehicles? A. always keep your vehicle to the right side of your lane D 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. Take special care when pulling two and three trailers. 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? A. air escape from the open valve You are driving with more than one trailer. All of the above, 6. Either the front or the rear brakes will not work properly or fully. front of the second trailer. Go to the rear of second trailer and open the emergency line shut-of valve. Nothing, the weight of the trailer will keep it in place, 10. We have a new version of this program. Doubles and triples are more likely to turn over than other combination vehicles because of what effect? This will let the rear wheels roll again and keep the rear wheels from sliding. 0000005345 00000 n What is a converter dolly? A good and safe driver will always look out for ______. C Calculate the voltage gain of each. This would be very dangerous. your vehicle is so long that you must swing wide to make a turn. The number of correct answers. What three methods can you use to secure a second trailer before coupling? The application only takes one minute. Any items you have not completed will be marked incorrect. Park the rear trailer against another trailer, chock the tires and lock the trailer 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. How do you check to make sure trailer height is correct before coupling? 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. How can you be sure you supplied air to a second trailer? Be certain you are clear at the sides before changing lanes. How should you test the coupling? Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. For emergency braking you should: Park on level ground, put chock on the tires, and charge the air tank. dress gifs. What value of channel width must the design use? You are doing a walk around inspection of a double or triple trailer rig. The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. C. foot pedal, Which of these statements about managing space to the sides is true? Any trailer with a reduced ground clearance What three methods can you use to secure a second trailer before coupling? What's a converter dolly? To help avoid mistakes, colors are sometimes used. To check air flows to all trailers, you should let air pressure reach normal then? If not, there is a problem. Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. Use only the trailer brakes The dolly tow bar may fly away, possibly causing panic, and making it very difficult When doing a walkaround inspection of a double or triple trailer, the shut-off valves should be _______ at the rear(s) of the front trailer(s) and ________ at the rear of the last trailer. You will have greater length and more dead axles to pull with your drive axles than other drivers. b. cell 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; . You shouldn't stop braking. 1/4 in. 1 At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. 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. We are an independent company focused on providing valuable motor vehicle and permit practice test information. The pintle hook? Time limit varies by state. 0000002636 00000 n 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. 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. Follow the procedures described later in this section. The road is dry, and visibility is good. ), a 15 year truck driving veteran, in January 2007. When inspecting the air brakes on doubles and triples, you wait for air pressure to reach normal, then push in the red trailer air supply knob. A. open You are driving a tractor with multiple trailers. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? C 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: Connect Converter Dolly to Front Trailer Back first semitrailer into position in front of dolly tongue. A dolly should be pulled out from a rear trailer using? A green traffic light allows the driver to go. unsafe slow down even further, or better yet, find a safe haven and park until the Which of these statements about the handling of doubles and triples is true? A truckers workspace is a small moving office Read More. Definition. 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. Make sure to visually inspect the fifth wheel and that the locking mechanism is C You are visually checking the coupling of a converter dolly to the rear trailer. which of these statements about managing space to the sides is true? Should I Be A Truck Driver? You are driving a 100 foot twin trailer combination at 50 mph. Your vehicle is so long that you must swing wide to make the turn. If there is a trailer allow "much more space than is needed for ideal driving conditions". A not have spring brakes. A. use light, steady pressure on the brake pedal When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. D. Make sure the spare tire is secured, if it has one. speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. 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?
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