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 pressure in the service line is controlled by the brake pedal and the trailer hand brake. 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 Converter dollies are connected to front trailers with a? Open the emergency line shut-off valve at the rear of the last trailer. Which of these statements about managing space to the sides is true? 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Should the shut-off valves on the trailers be open or closed on a set of double trailers? For emergency braking you should: May have poor traction due to bouncing and wheels lockup. 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. 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? 0000010306 00000 n Double and triple trailers increase not only the operators risk of safety, but also the other motorists around him. Tractor-trailers are considered combination vehicles. When you're trying to correct a drive-wheel braking skid why should you stop braking? 0000003977 00000 n B In order to receive your Doubles and Triples endorsement, it is required that you pass the state's official CDL written Knowledge exam. When does the Driver's manual say you should disable the steering axle brake? Air pressure is sent from the air tanks to the brakes by relay valves. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. It is extremely unlikely you will drive a trailer built before 1975, but for the written exam, you still may need to know that trailers built before 1975 were not required to have spring brakes. A B. for doubles and triples, the fifth wheel should be all the way towards the tractor You are driving a 100-feet truck with double trailers at 50 mph. fumoto drain valve. You should be sure the converter dolly air tank . What three methods can you use to secure a second trailer before coupling? 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]. air throughout the system. cQ 220rd8bihuM#Om>G*Lz)g^\l9'A9/omf|b49U[@%jGT-QR6i. What value of channel width must the design use? D when driving a truck with more than one trailer, which trailer should be first behind the truck? However, converter dollies and trailers built before 1975 are not required to have spring brakes. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. 0000003998 00000 n Park on level ground, put chock on the tires, and charge the air tank. What should you check for when inspecting the converter dolly? 0000003261 00000 n the rig will continue moving in a straight line no matter how much the steering wheel is turned. "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. Some areas of concern are discussed below. 2. 6. Delivering to. Related Question Question: What does this sign mean? To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. The converter dolly is an auxiliary axle with a coupling device. TestPermit.com provides free unofficial review materials for a variety of exams. Doubles and triples must be driven very smoothly to avoid rollover or jackknife. When the road is slippery 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. B. slow to a safe speed before entering the curve, then accelerate slightly through it The emergency line valve open and release air To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space To check air flows to all trailers, you should let air pressure reach normal then? Your vehicle is so long that you must swing wide to make the turn. A full trailer behind a truck To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. None You will speak with recruiters today. That there is no space between upper and lower sixth wheel. 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. True! A good and safe driver will always look out for ______. Leave the emergency line shut-off valve closed and open the service line valve. 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 must treat a flashing red signal as you would treat a STOP sign. 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. You will speak with recruiters today. You are driving a 100 foot twin trailer combination at 50 mph. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). 1/4 in. will have a lamp on the drivers side. You should be sure the converter dolly air tank drain . Seriously! [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. The dolly tow bar may flip up causing bodily injury and making it very difficult to Each trailer and converter dolly has one or more air tanks. ADVERTISEMENT ADVERTISEMENT Ship to Store. Hb```f``b`c``e@ (Q6_* You are driving a tractor with multiple trailers. You can reset the test and retake it as needed. This is CDL Doubles and Triples Test 3in our original Classic Mode. C. closed; unlatched, Which of these will result in the best control on a curve? 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: Disconnect the glad-hand at the front of the first trailer and listen for air flow. This has the same value as the %%TOTAL%% Variable on the Final Screen. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. 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? C. make things look larger and closer to you than they really are, When hauling triple trailers at a speed less than 40 mph, you should leave at least _____ second(s) for every ten feet of your truck between you and the vehicles ahead of you. Be certain you are clear at the sides before changing lanes. You have not finished your quiz. A. open the shut-off valves at the rear of both trailers They provide the air pressure used to operate trailer brakes. Before coupling a trailer, you should make sure it is at the right height using? How can you be sure you supplied air to a second trailer? C Any items you have not completed will be marked incorrect. There is no requirement or exact standard for color coding. 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 Time limit varies by state. Hit the article below to see specific information about AOBRDs! Becoming A Truck Driver is a dream we've all pondered at some point in our lives. Trailer Air Tanks And Shutoff Valves - Page 50. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. Each trailer and converter dolly has one or more air tanks. These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. This will prevent water and dirt from getting into the coupler and the air lines. symptoms of a bad fuel tank selector switch. Watch the wording of the question AND the answers A safe driver will look for all of the above. To check if the converter dolly is securely coupled to the rear trailer you should: Pull gently against the pin of the second trailer. These mirrors: These trailers have no parking brake. you are driving on a slippery road during the day. 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. 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. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. When uncoupling a rear trailer, you should remove some weight from the dolly by? A dolly is like a very short trailer, with a ring hitch on the front and a fifth wheel on top. Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! When connecting two trailers the converter dolly is connected to the rear trailer first. When you do this, you should hear: Which of these statements about emergency steering is true? Hit the article to see the way to back up your trailer like a pro! D. Make sure the spare tire is secured, if it has one. You should avoid traveling next to others when possible. In normal operation, trailer service brakes should be operated by? This has the same value as the %%SCORE%% Variable on the Final Screen. 60607. To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? 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. The pintle hook? B. slightly open You can also reach us at (888) 830-2326. b. cell B 10 Which of these statements about the handling of doubles and triples is true? If the converter dolly is close to your semitrailer, you should wheel it into position? How do you check to make sure trailer height is correct before coupling? Why should you use chocks when parking a trailer without spring brakes? 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. A sudden movement with the steering wheel can result in a tipping over rear trailer. You should keep at least ____ seconds of space ahead of you. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. A vehicle transporting hazardous materials is required to display placards where? How should you test the coupling? which of these is not a good thing to do when driving on slippery roads? dress gifs. For a particular IC-fabrication process, the transconductance parameter kn=400A/V2,k_{n}^{\prime}=400 \mu \mathrm{A} / \mathrm{V}^{2},kn=400A/V2, and Vt=0.5V.V_{t}=0.5 \mathrm{V}.Vt=0.5V. 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. CDL License Requirements State By State. B speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. Use only the trailer brakes Air flows steadily and isentropically through a passage. you are driving a set of doubles and a set of trailer wheels goes in a skid. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air brakes. The driver will be required to complete this requirement in three eight hour shifts. None of the above, 2. You should keep at least ____ seconds of space ahead of you. CDL Doubles and Triples Test Question and Answers 2023 [PDF]: Commercial Drivers License Doubles and Triples Endorsements Knowledge Test. Slow to the safe speed before entering, then accelerate slightly through the curve. Nothing, the weight of the trailer will keep it in place, 10. Be sure air-lines are supported and glad hands are properly connected. If one air system is very low on pressure _______. 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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