If youre reading this, youre probably asking yourself, Should I Read More, One aspect of living as a truck driver is that you are constantly away from home and have to purchase all your meals on the road. How can you test that air flows to all trailers? 8. A) closed . "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. For emergency braking you should: Air pressure is sent from the air tanks to the brakes by relay valves. A) one inch of space . It is very important to keep the air supply clean. when does the drivers manual say you should disable the steering axle brakes? Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested Doubles and triples must be driven very smoothly to avoid rollover or jackknife. 0000001354 00000 n Doubles and triples must be driven very smoothly to avoid rollover or jackknife. On double and triple combinations, you must make sure that which of these is secure? When you are pulling trailers, which of the following statements is true about steering? Which of these statements about the handling of doubles and triples is true? 0000002446 00000 n A. make things look smaller and farther away than they really are This is CDL Doubles and Triples Test 3in our original Classic Mode. 10. The road is dry and the visibility is good. What is a converter dolly? The driver will be required to complete this requirement in three eight hour shifts. When you do this, you should hear: Ais escape from the open valve. You will have greater length and more dead axles to pull with your drive axles than other drivers. A A full trailer behind a truck symptoms of a bad fuel tank selector switch. Which of these is the correct answer? 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? 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. Doubles and triples are extremely prone to control issues and must be The emergency line valve open and release air But the brakes will hold only as long as there is air pressure in the trailer air tank. ), a 15 year truck driving veteran, in January 2007. 0000008894 00000 n The rear trailers shut-off valves should be open and the front closed. Chock the tires, park on level ground and charge the trailer air tank if it does 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. Definition. In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. 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. The application only takes one minute. d. protein. B. are the easiest to stop since there is no shifting cargo B B. you need about four times as much stopping distance at 40 mph as at 20 mph What three methods can you use to secure a second trailer before coupling? The lighter trailer should be in the rear. Should the converter dolly air-tank drain valve be open or closed on a double trailer combination? The road is dry and visibility is good. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. Any vehicle required by federal regulations to be placarded while transporting hazardous materials. This has the same value as the %%TIME_USED%% Variable on the Final Screen. CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. The number of correct answers. utilize the brakes. 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 _______. All material on this website is copyrighted. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. We'll help you make the right choices and prepare for a great start to your trucking career. 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 . Make sure the converter dolly air tank drain valve is closed. and possible answers include: open, free or closed, latched or closed, free or open, latched from TruckersDouble & Triple Trailer (CDL) Endorsement. You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. B Locking jaws closed on All trademarks are property of their respective owners. You should be sure the converter dolly air tank . Speed for other vehicles is often too fast for a multi-combination unit! How To Use Cruise Control Effectively As A Truck Driver. When does the Driver's manual say you should disable the steering axle brake? Connect the Converter Dolly to the Rear Trailer: Test the coupling by pulling against the pin of the second semitrailer. A. require shorter stopping distances than full ones inspection of all equipment. A connection device of one axle used to disconnect a semitrailer combination vehicle What is a converter dolly? In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. It depends on the load Have little braking power because they are small This would be very dangerous. 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. B. You are driving with double trailers and must use your brakes to avoid a crash. The road is dry and the visibility is good. 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. More driving knowledge, questions and answers, online practice tests for obtaining a drivers . A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. A Safety chains secured to trailer (s). Open the emergency line shut-off valve at the rear of the last trailer. Make sure pintle hook is latched. When driving a truck with more than one trailer, which trailer should be first behind the truck? A truckers workspace is a small moving office Read More. If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. A low air buzzer will go off indicating something is wrong and either the front or the That there is no space between upper and lower fifth wheel. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. When checking the coupling system, make sure that the locking jaws are around the shank of the. 0000001956 00000 n Check them all. For emergency braking you should: May have poor traction due to bouncing and wheels lockup. When checking your air lines, they must be secure and? re-couple, You can if you want to, it does not matter. You are doing a walk around inspection of a double or triple trailer rig. 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 wish to turn right from one two-lane, two-way street to another. When testing the coupling of the double trailer the landing gears of the rear trailer should be: You want to hook your combination to a second trailer that has no spring brakes. Allow much more space than is needed for ideal driving condition. Hazardous materials must be placarded on all four sides of EACH Trailer. B. slightly raised Calculate the Mach number at section 2. On the first trailer in a set of doubles? High Road 2.0! 0000005733 00000 n Then, the air loss from the leak will lower the air tank pressure quickly. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. Converter dollies are connected to front trailers with a? Never, 9. B This will supply air to the emergency (supply) lines. That there is no space between upper and lower sixth wheel. If there are no dummy couplers, the glad hands can sometimes be locked together (depending on the couplings). 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. You are driving a 100 foot twin trailer combination at 50 mph. Pull gently against the pin of the second trailer. 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. 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 dolly tow bar may fly up You are driving a tractor with multiple trailers. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? A. opening the air tank petcock Hit the article below to see specific information about AOBRDs! 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D The road is dry and visibility is good. Which of these is NOT a good thing to do when driving on slippery roads? What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? If you leave this page, your progress will be lost. Converter dollies: True or False? Which diagram shows the best way to turn? Pickup at South Loop. Closed, free, 8. Air escape from the open valve allow "much more space than is needed for ideal driving conditions". Tractor-trailers are considered combination vehicles. When testing trailer service brakes, you should use? We are here to help. Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. When coupling twin trailers, a converter dolly is. That split second that you release the brakes will allow them to match the vehicles road Take special care when pulling two and three trailers. You can reset the test and retake it as needed. Once you are finished, click the button below. How can you test that air flows to all trailers? 6. door. B You will speak with recruiters today. the rig will continue moving in a straight line no matter how much the steering wheel is turned. The rear trailer does not have shut-off valves. Older trailers do not have spring brakes. A 360 degree area of awareness is You should NOT: You are driving a set of doubles and a set of trailer wheels goes into a skid. True! What does the Driver's manual say about how much space you should keep ahead of your truck? you are driving at night and you must dim your headlights for traffic. Why should you use chocks when parking a trailer without spring brakes? you are driving on a slippery road during the day. There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. B. releasing the pintle hook 10 Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). Some large trucks have curved (convex or spot) mirrors. The dolly tow bar may flip up causing bodily injury and making it very difficult to which of these is not a good thing to do when driving on slippery roads? When driving doubles or triples how should they be driven to avoid rollover or jackknifing: In normal operation, trailer service brakes should be operated by? Which is most likely to tip over: Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. The weight of the individual trailers will have no noticeable effect on the handling of the vehicle, The weight of all trailers should be nearly the same, within 2% of each other. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? When you're finished, check your score and results. Open the emergency line shut-off valve at the rear of the last trailer. B We are an independent company focused on providing valuable motor vehicle and permit practice test information. For emergency braking you should: If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? If one air system is very low on pressure _______. 9. 3. If you crossed the air lines, you could drive away, but you would not have trailer brakes. 1/4 in. A. the total stopping distance of a truck is the distance it takes to stop once the brakes are put on at any speed A. use a low gear Correct answer percentage. The puzzle: At the far left edge, the plates are in contact, so the path length difference between rays 222 and 333 is zero. The emergency brakes come on whenever the air supply knob is pulled out or the trailer is disconnected. A. you can steer more quickly and safely if you hold the wheel with one hand Open. Please wait while the activity loads. Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. When uncoupling a rear trailer, you should remove some weight from the dolly by? - Converter dolly air tank drain valve: CLOSED. They provide the air pressure used to operate trailer brakes. Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. D Time allowed (Requires timer add on). C. closed; unlatched, Which of these will result in the best control on a curve? The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. Closed, latched to do this without wheel chocks you should: supply air to the trailer air system with the tractor and then disconnect the emergency line. You should keep at least ____ seconds of space ahead of you. That there is some space between the upper and lower fifth wheel. Safety should never take second place, so know your stuff! which of these statements about quick steering movements and doubles/triples is true? Make sure you can hear air escaping with the valve closed. What is the most common foundation brake found on heavy vehicles? What three methods can you use to secure a second trailer before coupling? What happens if you cross the Emergency Air Line and the Service Air Line? All rights reserved 2022 TestPermit.com, CDL Doubles and Triples Test Question and Answers, Divided Highway Sign: Meaning, Quiz Definition, Example, Shape, Location, Color, Narrow Bridge Sign: Meaning, Quiz Definition, Example, Shape, Location, Color, STOP Sign 2023 Meaning, Quiz Definition, Example, Shape, Location, Color, Crossbuck Sign: Meaning, Definition, Example, Shape, Location, Color, Georgia CDL Permit Practice Test 2023 Study Guide [PDF], Georgia Motorcycle Permit Test 2023 with Study Guide [PDF], Georgia Permit Test 2023 (DDS Practice Test UPDATED), Georgia ADAP Practice Test 2023 Questions Answers Online, Ohio CDL Permit Practice Test 2023 Study Guide [PDF], Ohio Motorcycle Permit Test 2023 Study Guide [PDF]. The air lines will rupture The application only takes one minute. TestPermit.com provides free unofficial review materials for a variety of exams. [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. When the road is slippery 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. [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." Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. 0000006195 00000 n 0000008915 00000 n The converter dolly air tank drain valve on coupled double/triple trailers should be: You are driving a 100-feet truck with double trailers at 50 mph. You should keep at least ____ seconds of space ahead of you. 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 can also reach us at (888) 830-2326. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. A. always keep your vehicle to the right side of your lane 0000010705 00000 n The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. C Calculate the voltage gain of each. 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?