Some areas of concern are discussed below. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? How should the converter dolly air tank drain valve on coupled double A bent or damaged kingpin on a coupling should be? 7. Make sure you do not get in a spot you cannot pull straight through. When you go to the rear of the last trailer, what should you do to complete this check? behind the shut-off valve then they need to remain open. Unless you are draining the condensation out of the air tank, then the drain valve You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is ____. C. fully raised, Which of these statements about speed management and braking is true? Why should you check for when inspecting the converter dolly? This is CDL Doubles and Triples Test 3in our original Classic Mode. B. you can almost always stop more quickly than you can turn They provide the air pressure used to operate trailer brakes. You must treat a flashing red signal as you would treat a STOP sign. 6. Hb```f``b`c``e@ (Q6_* Try our free CDL Doubles and Triples Test Question and Answers Quiz online. The pintle hook should always be secure when the vehicle is in motion. Hit the article below to see specific information about AOBRDs! The heaviest trailer All of the above, 6. We have a new version of this program. How should you test the coupling? A. you can steer more quickly and safely if you hold the wheel with one hand 0000009577 00000 n 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: What does the Driver's manual say about how much space you should keep ahead of your truck? What types of trailers can get stuck on raised crossings? C. 3, You are doing a walk around inspection of a double or triple trailer rig. Locking jaws open 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. CDL Doubles & Triples Practice Test 3 - Classic Mode - Trucker Country For emergency braking you should: May have poor traction due to bouncing and wheels lockup. 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 coupling between a rear trailer and a dolly should have a space between the upper and lower fifth wheels of? To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space A securely fastened. Flammable materials in the front trailer then it must have the placards on that trailer. 4. Once you have coupled your rear trailer, you should test the coupling by? It is important to check the height of the trailer before connecting a converter dolly to a trailer. Types of converter dollies. The last trailer in a combination is most likely to turn over. 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 Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). A full trailer behind a truck B 2 Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. The A-dolly has a single drawbar with a single, centered hitching point. 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. C. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right may still be best, To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: What is a converter dolly? | Samsara B Wait for air pressure to reach normal, then push in the red trailer air supply knob. When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. Nothing, the weight of the trailer will keep it in place, 10. 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: 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. The last trailer in a combination is most likely to turn over. should remain in the closed position. To check if the converter dolly is securely coupled to the rear trailer you should: Pull gently against the pin of the second trailer. on kingpin. 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. Closed, latched Refers to pulling two trailers at the same time, otherwise known as "pups" or "pup trailers" because they're only about 28 feet long. That there is some space between the upper and lower fifth wheel. That split second that you release the brakes will allow them to match the vehicles road Pull gently against the pin of the second trailer. B. slightly raised Any items you have not completed will be marked incorrect. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. 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). Calculate the voltage gain of each. B. do not need to be checked as often as flat mirrors because they show a larger area B. you should avoid traveling next to others whenever possible Never pull any trailer without visually inspecting the fifth wheel locking bar View More Details. How do you know if your converter dolly is equipped with antilock brakes? Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. The braking systems of double and triple trailers are different than those of straight trucks because doubles and triples. For emergency braking you should: You are doing a walk around inspection of a double or triple trailer rig. The application only takes one minute. When inspecting a converter dolly What should you check for? When inspecting doubles and triples you must make sure there is air all the way to the back of the last trailer, otherwise what may not work? 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. D When does the Driver's manual say you should disable the steering axle brake? 0000001375 00000 n The road is dry and visibility is good. Make sure trailer height is correct. A good and safe driver will always look out for ______. Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . If spare tire is on converter gear (dolly), make sure it is secured. Doubles/Triples Air Brake Check - digital.ncdcr.gov Which of these are the correct positions for shut-off valves in doubles and triples? 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? Open the shut-off valves at the rear of the last trailer and listen for air flow. If the spring brakes do not release when you push the trailer air supply control, check the air line connections. 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? D Doubles and triples take up more space than other commercial vehicles. Older trailers do not have spring brakes. A low air buzzer will go off indicating something is wrong and either the front or the you want to hook your combination to a second trailer that has no spring brakes. The lighter semitrailer should be in first position behind the tractor. True! When you're trying to correct a drive-wheel braking skid why should you stop braking? the fifth wheel, so trailer is raised slightly when dolly is pushed under it. Good speed management says you should: You must drive through deep or flowing water. Doubles and triples are more likely to turn over than other combination vehicles because of the "crack- the-whip" effect. Before coupling a trailer, you should make sure it is at the right height using? Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. unsafe slow down even further, or better yet, find a safe haven and park until the There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. c. iron A. air escape from the open valve 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. Question 3 Explanation: All of the above. View the full article to see how to set cruise control correctly! Slow to the safe speed before entering, then accelerate slightly through the curve. B Pickup at South Loop. If it goes low enough, the trailer emergency brakes will come on. 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. None of the above, 2. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. Which diagram shows the best way to turn? you are driving a set of doubles and a set of trailer wheels goes in a skid. You should avoid traveling next to others when possible. if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. A sudden movement with the steering wheel can result in a tipping over rear trailer. You can find it here: High Road 2.0. Which of these is the correct answer? Why should you use chocks when parking a trailer without spring brakes? Blue is used for the service lines, and red for the emergency (supply) lines. ), a 15 year truck driving veteran, in January 2007. Because of this, which of the following vehicle parts is most likely to tip over? To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space [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]. What should you check for when inspecting the converter dolly and the pintle hook? door. Pintle-eye of dolly in place in pintle hook of trailer (s). Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. When the road is dry At TruckingTruth we'll help you decide if trucking is right for you and help you get your career off to a great start. How can you test that air flows to all trailers? What is the most common foundation brake found on heavy vehicles? can and will get stuck on a raised railroad crossing. and the converter dolly air tank drain valve should be _____. Locking jaws closed on You should reduce your speed by about _____ on a wet road. Use only the trailer brakes Provides a snug fit to eliminate unwanted seepage of air or water. 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. Park the rear trailer against another trailer, chock the tires and lock the trailer 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 . PDF Doubles and triples 1. The stopping distance for a tractor trailer C you are doing a walkaround inspection of a double or triple trailer rig. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. A Commercial Drivers License Overview, Trucking Terminology and Transportation Definitions. you are driving at night and you must dim your headlights for traffic. Once you are finished, click the button below. You should hear air escaping, showing the entire system is charged. A. open the shut-off valves at the rear of both trailers some large trucks have curved (convex or spot) mirrors. Each trailer and converter dolly has one or more air tanks. When you're finished, check your score and results. Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? Should the shut-off valves on the rear of the last trailer be open or closed? Should I Be A Truck Driver? 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. It's a fifth wheel, not a sixth wheel. symptoms of a bad fuel tank selector switch. Join 50,000+ users around America to get your Commercial Driver License today! To check air flows to all trailers, you should let air pressure reach normal then? 0000001354 00000 n B. keep gentle pressure on the brakes while going through the water and for a short distance after coming out you should check the trailer height before connecting a converter dolly to a second or third trailer. The rear trailer does not have shut-off valves. Mar 2 - Mar 3. Make sure pintle hook is latched. 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? Number of wrong answers. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can Dobles - Triples Pruebas de prctica 3 - NJ 2023 - CristCDL.com (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 0000010285 00000 n A turn of the glad hand attached to the hose will join and lock the couplers. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. A safe speed on a curve for a straight truck or a single trailer combination vehicle may be too fast for a set of doubles or triples. %PDF-1.2 % All material on this website is copyrighted. The rear trailers shut-off valves should be open and the front closed. P0420 code honda odyssey 2011 - pjigzp.wikifit.it Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. Trailer Air Tanks And Shutoff Valves - TruckingTruth Doubles Triples Endorsement Test Flashcards | Quizlet You will speak with recruiters today. When uncoupling a rear trailer, you should remove some weight from the dolly by? The shortest trailer Allow more following distance. B. slightly open You should be sure the converter dolly air tank . They are not only longer, but also need more space because they cannot be turned or stopped suddenly. The shut off valves prevent air from going any further. C Open, latched However, converter dollies and trailers built before 1975 are not required to have spring brakes. Visually check to make sure that the lead trailer is slightly higher than the center of C. posted speed limits on curves are safe for all trucks, Empty trucks: A) one inch of space . locked . You should keep at least _____ seconds of space ahead of you. The number and size of air tanks varies among vehicles. You will have greater length and more dead axles to pull with your drive axles than other drivers. Inspecting Doubles And Triples | High Road Online CDL Training Slow to a safe speed before entering the curve, then coast through the curve. 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: Their drawbars differentiate them. 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. The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Seriously! open, closed, closed: Term. The final procedure when connecting a rear trailer is to? Doubles and triples are more likely to turn over than other combination vehicles because of the "crack-the-whip" effect. not have spring brakes. Therefore, look far ahead so you can slow down or change lanes gradually when necessary. You are driving a triple trailer and there is a loss of air pressure in the emergency line. 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. When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? These mirrors: For emergency braking you should: Use controlled or stab braking Converter dollies: Often do not have spring brakes The crack the whip effect that troubles trucks with trailers. You should hear air escaping, showing the entire system is charged. C. When coupling doubles and triples, be sure that the pintle-eye of the dolly is in place in the pintle hook of the trailer, You are driving on a slippery road during the day. 0000003240 00000 n More driving knowledge, questions and answers, online practice tests for obtaining a drivers . you should keep atleast __seconds of space ahead of you. B. allow one vehicle length for every 10,000 lbs of gross vehicle weight 0000001956 00000 n B. keep other traffic out of your side space Any trailer with a reduced ground clearance For all brakes to work on a triple combination, you must have air supply? 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. A green traffic light allows the driver to go. You are driving a tractor with multiple trailers. Take special care when pulling two and three trailers. These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. 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. You should keep at least ___ seconds of space ahead of you. Hit the article to see the way to back up your trailer like a pro! Go to the rear of the rig. The word part ferrit- means: B Calculate the Mach number at section 2. C. the service brakes slowly move to the fully applied position, Some large trucks have converted or "spot" mirrors. Correct answer percentage. If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. Then, the air loss from the leak will lower the air tank pressure quickly. If you crossed the air lines, you could drive away, but you would not have trailer brakes. A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. You can also reach us at (888) 830-2326. Which of the following statements about off tracking is true? Safety should never take second place, so know your stuff! But the brakes will hold only as long as there is air pressure in the trailer air tank. Flashcards - Doubles Tripes Test #4 - FreezingBlue 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested CDL License Requirements State By State. A you are visually checking the coupling of a converter dolly to the rear trailer. Double and Triples Endorsement Flashcards 5. Charge the system and pump the brakes with the window down. C. closed, You can release the dolly brakes by: Make sure you have large enough gaps before entering or crossing traffic. How do you check to make sure trailer height is correct before coupling? Flashcards - Doubles Triples Test #3 - FreezingBlue 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. What does the drivers manual say about how much space you should keep ahead of your truck? A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. 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. kingpin. What should you check for when inspecting a converter dolly? Nothing will happen, but an in-cab warning indicator will let you know about the problem, It will cause the tractor protection valve to close and the trailer emergency brakes to come on, It will cause the tractor protection valve to open and the trailer emergency brakes to come on, When you try to put the service brakes on, air will quickly leak and will lower the air tank pressure, possibly activating the trailer emergency brakes, The emergency brakes will come on automatically as soon as a major leak occurs, Nothing, but braking power will be reduced, Air pressure will quickly leak away, even if you are not using the service brakes, Using a combination of the emergency air line and the service air line, Supply air will be sent to the service line instead of going to charge the trailer air tanks which means the trailer spring brakes will not release, Newer vehicles automatically detect if the lines are crossed and will auto-correct itself, Air will continue filling the air holding tanks until the tanks rupture from excessive pressure, Supply air will cause all brakes to release and the truck will roll freely without any braking ability, Trailers typically do not have their own air tanks, Designed to turn off the truck engine when a brake failure occurs, Used in the service and supply air lines at the back of trailers used to tow other trailers, Placed at each trailer spring brake and are designed to engage the emergency brakes when air pressure becomes too high, The yellow and red air control knobs located in the cab of a truck, Used to secure the trailer kingpin to the tractor 5th wheel, Caps which cover the valve stems on tires, A name for the yellow and red air valves in the cab of a truck, Coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer, Email Updates When New Articles Are Posted.