The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. B. keep other traffic out of your side space 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. 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 If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). This will let the rear wheels roll again and keep the rear wheels from sliding. 0000008915 00000 n You are driving a triple trailer and there is a loss of air pressure in the emergency line. 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 doing a walkaround inspection of a double or triple trailer rig. You should keep at least ____ seconds of space ahead of you. The road is dry and the visibility is good. 0000008166 00000 n This will prevent water and dirt from getting into the coupler and the air lines. B. do not need to be checked as often as flat mirrors because they show a larger area If spare tire is on converter gear (dolly), make sure it is secured. A. use the engine brake or speed retarder You are doing a walk around inspection of a double or triple 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." Connect Converter Dolly to Rear Trailer Make sure trailer brakes are locked and/or wheels chocked. B. pull gently against the pin of the second semitrailer The road is dry and visibility is good. You will speak with recruiters today. This has the same value as the %%SCORE%% Variable on the Final Screen. D 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? converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can 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. The trailer is at the correct height when. The trailer brakes will unlock 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. You need to brake in order to regain control. You are driving a 100 ft twin trailer combination at 50 mph. The converter dolly air tank drain valve on coupled double/triple Make sure you have large enough gaps before entering or crossing traffic. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. Related Question Question: What does this sign mean? Safety chains should be secured to trailer(s). 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. This section explains how important it is to be careful when driving with more than one trailer, how to couple and uncouple correctly, and about inspecting doubles and triples carefully. When uncoupling a rear trailer, you should remove some weight from the dolly by? 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 controlled or stab braking, The best way to stop any skid is to: When connecting two trailers the converter dolly is connected to the rear trailer first. ), a 15 year truck driving veteran, in January 2007. Make sure trailer height is correct. open, closed, closed: Term. Closed, free, 8. Because of this, which of the following vehicle parts is most likely to tip over? and the converter dolly air tank drain valve should be _____. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. fifth wheel, so trailer is raised slightly when dolly is pushed under it. D 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: 1 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. If the air supply in the trailer air tank has leaked away, there will be no emergency brakes, and the trailer wheels will turn freely. B How much space should be between the upper and lower fifth wheels? Try our free CDL Doubles and Triples Test Question and Answers Quiz online. Opening the shut off valves on the rear most trailer will ensure the lines are flowing The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Please visit using a browser with javascript enabled. How can you test that air flows to all trailers? Leave the emergency line shut-off valve closed and open the service line valve. Provides a snug fit to eliminate unwanted seepage of air or water. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? Double and Triples Endorsement Flashcards Make sure you can hear air escaping with the valve closed. For emergency braking you should: which of these statements about emergency steering is true? None of the above, 2. A. make things look smaller and farther away than they really are C. closed, You can release the dolly brakes by: 0000009577 00000 n That there is no space between upper and lower sixth wheel. Question 3 Explanation: All of the above. We wish you the best of luck in your endeavors and are pleased to be of assistance. The final procedure when connecting a rear trailer is to? Pull gently against the pin of the second trailer. 0000005664 00000 n 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. 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: D. Make sure the spare tire is secured, if it has one. What do you check when making a visual check of coupling? If this lamp is illuminated and does not go out, Which is most likely to tip over: retrovirus $_____________________________$. 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. CDL Doubles and Triples Test Question and Answers A good and safe driver will always look out for ______. C. 3, You are doing a walk around inspection of a double or triple trailer rig. The Home Depot Logo Pickup at South Loop. These valves permit closing the air lines off when another trailer is not being towed. . 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 Take special care when pulling two and three trailers. Clean the couplers and rubber seals before a connection is made. With the red knob pushed in on the tractor dash, the service line should have air in it. 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. Pull gently against them in a low gear to make sure the brakes work. Definition. You are driving a 100 foot twin trailer combination at 50 mph. 0000004689 00000 n 27. B. you should avoid traveling next to others whenever possible 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. d. protein. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. Each trailer and converter dolly has one or more air tanks. Have little braking power because they are small They are not only longer, but also need more space because they cannot be turned or stopped suddenly. The coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? 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. A. fully lowered Usually need a glad hand converter will have a lamp on the drivers side. The service brakes slowly move to the fully applied position Any vehicle required by federal regulations to be placarded while transporting hazardous materials. You should keep at least ____ seconds of space ahead of you. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. Either the front or the rear brakes will not work properly or fully. 5. If you leave this page, your progress will be lost. When uncoupling the converter dolly Why should you never unhook the Never, 9. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. 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. Question 4. 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. A. brake and downshift in a curve Contributor: Luke Nold (Experienced truck driver for 5+ years and published writer for Fleet Magazine). 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: To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. What do you check when making a visual check of coupling? 0000009556 00000 n There is a school zone ahead. 0000007487 00000 n Which of these is the correct answer? What should you check for when inspecting a converter dolly? When checking the fifth wheel, you should make sure that it has enough? You should avoid traveling next to others when possible. How should you test the coupling? cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. Visually check to make sure that the lead trailer is slightly higher than the center of B. releasing the pintle hook D The rear trailer of a double Which diagram shows the best way to turn? In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? It's a fifth wheel, not a sixth wheel. 4. These trailers have no parking brake. When inspecting a converter dolly What should you check for? Lock pintle hook. You should reduce your speed by about _____ on a wet road. These mirrors: Make things seem smaller and further away than they really are. CDL: Doubles/Triples Flashcards | Quizlet On the middle trailer of a set of triples? DMV Doubles Triples Practice Test | CDL Knowledge Double/Triple Flashcards | Quizlet The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. Converter dolly air tank drain valve: CLOSED. Converter dollies have spring brakes. A. use a low gear Chock the tires, park on level ground and charge the trailer air tank if it does Which of these is NOT a good thing to do when driving on slippery roads? Correct answer percentage. Go to the rear of the rig. fumoto drain valve. These valves permit closing the air lines off when another trailer is not being towed. Pintle-eye of dolly in place in pintle hook of trailer (s). What does the drivers manual say about how much space you should keep ahead of your truck? You are driving a tractor with multiple trailers. Finsbury Pump Systems 400l (Single Stage) 5.5hp Honda Gx Petrol Engine CDL License Requirements State By State. inspection of all equipment. When you do this, you should hear: A. opening the air tank petcock 0000005345 00000 n Sketch the shape of the passage between sections 1 and 2. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. D If spare tire is carried on converter gear (dolly), make sure it's secured. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. the road is dry & visibility is good. 8. None of the above, 4. kingpin. 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? 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. You should keep at least _____ seconds of space ahead of you. Allow much more space than is needed for ideal driving condition. Why should you use chocks when parking a trailer without spring brakes? What happens when there is a major leak in the emergency air line? Make sure the converter dolly air tank drain valve is closed. mTouch Quiz will automatically populate the fields below. Take this same test in our other testing modes How to Get a Hazardous Materials Endorsement, What is a CDL? For emergency braking you should: The lighter semitrailer should be in first position behind the tractor. You can test that air is flowing to all trailers by opening? Open You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. 2022 DE Doubles - Triples CDL Quick Review 1 - CristCDL.com [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]. While it is general practice to make blue the service line, red the emergency line, and green the electrical line, these colors are not required by any laws or regulations. you are driving on a slippery road during the day. Your vehicle is so long that you must swing wide to make the turn. The Doubles and Triples written CDL Exam is required for your doubles and triples endorsement. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. A. release the spring brakes and check for movement Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). 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. You should NOT: For emergency braking you should: C. always keep your vehicle to the left side of your lane, When testing the coupling of double trailers, the landing gear of the rear trailer should be: kingpin, That there is grease between upper and lower fifth wheel. 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 Before coupling a trailer, you should make sure it is at the right height using? That split second that you release the brakes will allow them to match the vehicles road 0000010783 00000 n Time used (Requires timer add on). However there are some states that allow doubles that are each 48 feet in length. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. It is important not to let water and oil build up in the air tanks. View the full article to see how to set cruise control correctly! The tanks will hold enough air to allow the brakes to be used several times even if the compressor stops working. 2 There is no requirement or exact standard for color coding. 0000001775 00000 n The last trailer in a combination is most likely to turn over. Each trailer and converter dolly has one or more air tanks. A. for coupled doubles and triples, be sure that the pintle hook is in the open position The dolly will have a yellow lamp on the drivers (left) side. Flashcards - Doubles Tripes Test #4 - FreezingBlue Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. 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.
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