What do you check when making a visual check of coupling? Question 3 Explanation: All of the above. %PDF-1.2
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C. fully raised, Which of these statements about speed management and braking is true? Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. Seriously! What does the Commercial Driver Handbook say about how much space you should keep ahead of your truck? 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: There is a school zone ahead. You need to brake in order to regain control. The rear trailers shut-off valves should be closed and the front open. open, closed, closed: Term. fumoto drain valve. You must steer gently when pulling trailers. The shut off valves prevent air from going any further. C. engaging the tractor valve protection control, You must drive through deep or flowing water. ADVERTISEMENT ADVERTISEMENT 0000003261 00000 n
For emergency braking you should: Watch the wording of the question AND the answers A safe driver will look for all of the above. What should you check for when inspecting the converter dolly? B. are the easiest to stop since there is no shifting cargo Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! The heavier trailer should be in the rear. Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). 0000005345 00000 n
The emergency brakes come on whenever air pressure in the emergency line is lost. 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? the road is dry & visibility is good. Which of the following must be connected when coupling tractor to trailer or trailer to trailer? The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. Safety fail-safe features of a tractor-trailer converter dolly. B D If you leave this page, your progress will be lost. 0000001107 00000 n
How can you test that air flows to all trailers? A What's a converter dolly? Ship to Store. What is a converter dolly? 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. Any time you have to B. you should avoid traveling next to others whenever possible When you go to the rear of the last trailer, what should you do to complete this check? Open, free You will speak with recruiters today. the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. D D weather passes. You may be timed. 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. unsafe slow down even further, or better yet, find a safe haven and park until the You will speak with recruiters today. You are driving a 100 foot twin trailer combination at 50 mph. All other trailer air functions use the emergency line. air throughout the system. You should keep at least ____ seconds of space ahead of you. The road is dry and visibility is good. A. use a low gear inspection of all equipment. the fifth wheel, so trailer is raised slightly when dolly is pushed under it. ), a 15 year truck driving veteran, in January 2007. Be more careful in adverse conditions. Shut off valves are only used on trailers designed to be towed in conjunction with other trailers (doubles / triples). In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. symptoms of a bad fuel tank selector switch. Pintle hook latched. You will not be tested on uncoupling twins unless you want to get a double/triple trailer endorsement on your license. which of these statements about managing space to the sides is true? Converter dollies are connected to front trailers with a? When uncoupling doubles or triples, what is important to know about unlocking the pintle hook? 21 0 obj
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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: you are doing a walkaround inspection of a double or triple trailer rig. B. c. iron A. open the shut-off valves at the rear of both trailers Pickup at South Loop. Close the emergency line shut-off valve at the rear of the trailer. 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. during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? 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 have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. You are driving a tractor with multiple trailers. Some areas of concern are discussed below. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. You can test that air is flowing to all trailers by opening? How do you check to make sure the trailer height is correct before coupling? B. johnson bar Once you have coupled your rear trailer, you should test the coupling by? Never pull any trailer without visually inspecting the fifth wheel locking bar A. release the spring brakes and check for movement Be sure air-lines are supported and glad hands are properly connected. Closed, latched The emergency line valve open and release air When coupling twin trailers, a converter dolly is. If you do, the brakes may not work correctly. This has the same value as the %%SCORE%% Variable on the Final Screen. 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. Tips for Backing Up a Trailer Like a Pro Trucker. C More driving knowledge, questions and answers, online practice tests for obtaining a drivers . When driving doubles or triples how should they be driven to avoid rollover or jackknifing: 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. open the shut-off valves at the rear of the first trailer and close the shut-off valves at the rear of the second trailer, enclose converter dolly air tank drain valves In double and triple trailers, the trailer air supply control should pop or _________ when air pressure drops into the range of 20 to 45 psi. The shortest trailer In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. 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. Open. You should keep at least ____ seconds of space ahead of you. When the road is dry 10 With the red knob pushed in on the tractor dash, the service line should have air in it. If loading fails, click here to try again. Please visit using a browser with javascript enabled. can and will get stuck on a raised railroad crossing. The couplers have a rubber seal that prevents air from escaping. door. Locking jaws closed on The word part ferrit- means: Typically depends on the axle count. rear brakes will not work properly. What should you check for when inspecting a converter dolly? You must steer gently when pulling trailers. During normal operation the brakes of the double/triple trailer are controlled by: You are driving at night and you must dim your headlights for traffic. Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). Either the front or the rear brakes will not work properly or fully. Because of this, which of the following vehicle parts is most likely to tip over? The trailer brakes will unlock This would be very dangerous. A. allow "much more space" than is needed for ideal driving conditions Which of the following statements about off tracking is true? Trailer Air Tanks And Shutoff Valves - Page 50. when driving a truck with more than one trailer, which trailer should be first behind the truck? Air escape from the open valve B. restore traction to the tires Visually check to make sure that the lead trailer is slightly higher than the center of . Safety should never take second place, so know your stuff! when does the drivers manual say you should disable the steering axle brakes? You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. slow to safe speed before entering, then accelerate slightly through the curve. 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. That split second that you release the brakes will allow them to match the vehicles road The heaviest trailer Open the emergency line shut-off valve at the rear of the last trailer. B A truckers workspace is a small moving office Read More. 0000009556 00000 n
Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. Explore now! 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. CDL License Requirements State By State. 1/32 to 3/32 of an inch. You are driving a 100 ft twin trailer combination at 50 mph. Which of these statements about managing space to the sides is true? What three methods can you use to secure a second trailer before coupling? and ensuring it is secure. If you want to couple a second trailer to your combination vehicle, secure it by using: The crack-the-whip effect that troubles trucks with trailers is most likely to cause a tip over: You are driving on a slippery road during the day. how much space should be between the upper and lower fifth wheel? 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 The pressure in the service line is controlled by the brake pedal and the trailer hand brake. 0000007487 00000 n
That there is some space between the upper and lower fifth wheel. In the coupling system, the locking jaws should be fixed around? The rear trailer of a double 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested Ideal for replacing a worn, leaky drain valve on a compressor. 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. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. you are driving a 100ft truck eith double trailers at 50mph. Flammable materials in the front trailer then it must have the placards on that trailer.