0000004668 00000 n This means. A-dolly. B. keep other traffic out of your side space 1. Safety chains should be secured to trailer(s). What is a converter dolly? the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. If you do, the brakes may not work correctly. Converter dolly air tank drain valve: CLOSED. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? You need to brake in order to regain control. While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. Pintle hook latched. The heaviest trailer Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. A "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Ship to Store. B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out 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. Time limit varies by state. 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 _______. These trailers have no parking brake. 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? You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. View the full article to see how to set cruise control correctly! What do you check when making a visual check of coupling? Once that's complete, then its an easy push back and the B. You are driving a 100 ft twin trailer combination at 50 mph. A converter dolly is a piece of equipment designed to allow commercial trucks, such as semi-trucks, to pull a trailer. which of these statements about the handling of doubles and triples is true ? A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). then there is a problem with the ABS system. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space If the spring brakes do not release when you push the trailer air supply control, check the air line connections. How To Use Cruise Control Effectively As A Truck Driver. All ABS equipped units fumoto drain valve. The rear trailer does not have shut-off valves. In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. You should hear air escaping, showing the entire system is charged. CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. on kingpin. The dolly tow bar may fly up Join 50,000+ users around America to get your Commercial Driver License today! Each trailer and converter dolly has one or more air tanks. Leave the emergency line shut-off valve closed and open the service line valve. should remain in the closed position. can and will get stuck on a raised railroad crossing. 0000001107 00000 n B Before you can supply air to the air tanks of a second trailer you need to. Doubles and triples are more likely to overturn than other combination vehicles because of the whip cracking effect. Calculate the net energy change in kilojoules per mole that takes place on formation of MgF2_22(s) from the elements: Heat of sublimation for Mg(s) = 147.7 kJ/mol Eea_{ea}ea for F(g) = -328 kJ>mol, Bond dissociation energy for F2_22(g) = 158 kJ>mol Ei1_{i1}i1 for Mg(g) = 737.7 kJ>mol, Electrostatic interactions in MgF2_22(s) = -2957 kJ/mol Ei2_{i2}i2 for Mg(g) = 1450.7 kJ/mol. 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? doubles/triples flip flop over from quick steering movements more easily than many other vehicles. The DMV doubles triples practice test will examine your knowledge of pulling double/triple trailers, coupling and uncoupling, inspecting doubles and triples, and checking air brakes. [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." You have not finished your quiz. Any vehicle required by federal regulations to be placarded while transporting hazardous materials. Submit your email at the end of the test. A sudden movement with the steering wheel can result in a tipping over rear trailer. Tractor-trailers are considered combination vehicles. You can test that air is flowing to all trailers by opening? 9. View the price and details of this FINSBURY PUMP SYSTEMS 400L (SINGLE STAGE) 5.5HP HONDA GX PETROL ENGINE (18M HOSE) FIRE WATER TANK | Mobile fire units. Please wait while the activity loads. Some large trucks have curved (convex or spot) mirrors. 11 When the road is slippery There are more critical parts to check when you have two or three trailers. Allow much more space than is needed for ideal driving condition. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. A. closed; latched Open 1. 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. On a triple combination, the shutoff valves at the rear off the middle trailer should be? You are doing a walk around inspection of a double or triple trailer rig. 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. Select the answer that correctly completes each statement. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. Usually need a glad hand converter Before you can supply air to the air tanks of a second trailer you need to: Open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of second trailer. 1/32 to 3/32 of an inch. For all brakes to work on a triple combination, you must have air supply? These valves permit closing the air lines off when another trailer is not being towed. 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: first check for battery voltage to the valve by probing the wires of the electrical connector with a volt-meter it should be about 10.5 volts if not it's probably bad.next remove the valve. 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 Calculate the Mach number at section 2. 0000001162 00000 n B. for doubles and triples, the fifth wheel should be all the way towards the tractor The road is dry and visibility is good. Air pressure is sent from the air tanks to the brakes by relay valves. B. pull gently against the pin of the second semitrailer However there are some states that allow doubles that are each 48 feet in length. Closed, free, 8. These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. Slow to the safe speed before entering, then accelerate slightly through the curve. which of these statements about managing space to the sides is true? You should keep at least ____ seconds of space ahead of you. The word part ferrit- means: 4. securely fastened. The number of correct answers. 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. You are visually checking the coupling of a converter dolly to the rear trailer. 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: weather passes. symptoms of a bad fuel tank selector switch. That there is some space between the upper and lower fifth wheel. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested Take special care when pulling two and three trailers. That there is no space between upper and lower fifth wheel. Use only the trailer brakes Should I Be A Truck Driver? 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. What does the Driver's manual say about how much space you should keep ahead of your truck? 10 Related Question Question: What does this sign mean? Safety fail-safe features of a tractor-trailer converter dolly. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. 0000003240 00000 n When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. The service air line is only used to control the service brakes (when you press on the brake pedal or use the trailer hand-valve). This has the same value as the %%TIME_USED%% Variable on the Final Screen. Each trailer and converter dolly has one or more air tanks. The application only takes one minute. How do you check to make sure trailer height is correct before coupling? What three methods can you use to secure a second trailer before coupling? It is very important to keep the air supply clean. Which of these statements about quick steering movements and doubles/triples is true? 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. go to the rear of the second trailer and open the emergency line shut off, before you can supply air to the air tanks of the second trailer you need too, open the shut-off valves at the rear of the first trailer & close the shut-off valves at the rear of the second trailer. 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. 3. Time allowed (Requires timer add on). All of the above, 6. 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; . A Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. utilize the brakes. For emergency braking you should: 0000005664 00000 n 6. You are driving a triple trailer and there is a loss of air pressure in the emergency line. Provides a snug fit to eliminate unwanted seepage of air or water. When you do this, you should hear: B. restore traction to the tires It's a fifth wheel, not a sixth wheel. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. What should you check for when inspecting the converter dolly? . 2. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. 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. None The shut off valves, when in the open position, allows air to flow out to another trailer. But the brakes will hold only as long as there is air pressure in the trailer air tank. A. require shorter stopping distances than full ones We wish you the best of luck in your endeavors and are pleased to be of assistance. %PDF-1.2 % Push the brake pedal as hard as you can and hold it there 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: Make sure trailer height is correct. With the red knob pushed in on the tractor dash, the service line should have air in it. TestPermit.com provides free unofficial review materials for a variety of exams. 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. Use controlled or stab braking A. for coupled doubles and triples, be sure that the pintle hook is in the open position Also, this page requires javascript. A. air escape from the open valve and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. 1 and the converter dolly air tank drain valve should be _____. which of these is not a good thing to do when driving on slippery roads? There are two types of converter dollies. Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. The road is dry and the visibility is good. You must treat a flashing red signal as you would treat a STOP sign. Question 4. A Some areas of concern are discussed below. The dolly tow bar may fly away, possibly causing panic, and making it very difficult Doubles/triples flip flop over from quick steering moves more easily than many vehicles. This would be very dangerous. 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 doing a walkaround inspection of a double or triple trailer rig. Safety chains secured to trailer (s). You should be sure the converter dolly air tank drain valves are _______ & the pintle hook is __________. 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. Mar 2 - Mar 3. locked . Seriously! Make sure you have large enough gaps before entering or crossing traffic. what is likely to happen if the pintle hook is unlocked with the dolly still under the second trailer? When you do this, you should hear: Which of these statements about emergency steering is true? C. 3, You are doing a walk around inspection of a double or triple trailer rig. Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. you are doing a walkaround inspection of a double or triple trailer rig. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. Dont hesitate to take advantage of our practice tests in each category specific to your needs. You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. The pressure in the service line is controlled by the brake pedal and the trailer hand brake. If the converter dolly is close to your semitrailer, you should wheel it into position? If this lamp is illuminated and does not go out, Converter dollies are connected to front trailers with a? A good and safe driver will always look out for ______. 0000001582 00000 n When you do this, you should hear: A low air buzzer will go off indicating something is wrong and either the front or the Air pressure is sent from the air tanks to the brakes by relay valves. Hook dolly to front trailer. On double and triple combinations, you must make sure that which of these is secure? 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? What is most likely to happen if the trailer protection valve of a double or triple trailer does not function correctly? You should keep at least ____ seconds of space ahead of you. Once you are finished, click the button below. Typically depends on the axle count. Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. You will speak with recruiters today. Never unlock the pintle hook with the dolly still under the rear trailer. The road is dry and visibility is good. 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 and ensuring it is secure. When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. B. open; latched B Open, latched Air Storage and Drain Tanks: Air storage tanks are used to hold compressed air. In the coupling system, the locking jaws should be fixed around? B If it goes low enough, the trailer emergency brakes will come on. retrovirus $_____________________________$. C. closed, You can release the dolly brakes by: To check air flows to all trailers, you should let air pressure reach normal then? A. use the engine brake or speed retarder B. do not need to be checked as often as flat mirrors because they show a larger area c. iron You must steer gently when pulling trailers. King pin. The rear trailers shut-off valves should be closed and the front open. when testing the coupling of a double trailer the landing gears of the rear trailer should be, you must drive through deep or flowing water . A Types of converter dollies. 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: A Take special care when pulling two and three trailers. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Which diagram shows the best way to turn? A. brake and downshift in a curve 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. The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. Which of the following must be connected when coupling tractor to trailer or trailer to trailer? If the dolly is a two axle unit then 1 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? 10. 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. Park the rear trailer against another trailer, chock the tires and lock the trailer Why should you not use the trailer hand valve while driving? The trailer height is right when: The trailer will be raised slightly when the converter dolly is backed under it. second trailer will be connected, The dolly will have a yellow lamp on the left side, The dolly will have a yellow lamp on the right side, The dolly will have a red lamp on the left side, The dolly will have a red lamp on the right side.
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