the converter dolly air tank drain valve should be

A bent or damaged kingpin on a coupling should be? C If you do cross the air lines, supply air will be sent to the service line instead of going to charge the trailer air tanks. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. The pressure in the service line is controlled by the brake pedal and the trailer hand brake. Any trailer, 7. which of these statements about quick steering movements and doubles/triples is true? you are driving on a slippery road during the day. Secure converter gear support in raised position. If spare tire is carried on converter gear (dolly), make sure it's secured. 0000007487 00000 n For emergency braking you should: which of these statements about emergency steering is true? Remember: The trailer air brakes are supplied with air using the emergency line (also called the supply line). The A-dolly has a single drawbar with a single, centered hitching point. You should be sure the converter dolly air tank drain valves are _______ and the pintle hook is _____. None of the above, 4. The total number of questions. Dont hesitate to take advantage of our practice tests in each category specific to your needs. The converter dolly air tank drain valve on coupled double/triple trailers should be: Closed. When coupling, be sure to couple the proper glad hands together. Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. Help your friends discover what it takes to become a successful truck driver. True! If the dolly is a two axle unit then 1 B Should I Be A Truck Driver? When checking your air lines, they must be secure and? B. slightly open Lock pintle hook. Join 50,000+ users around America to get your Commercial Driver License today! If your converter dolly has to be moved over a distance to bring it to your semitrailer, you should? you are visually checking the coupling of a converter dolly to the rear trailer. A Time used (Requires timer add on). Charge the system and pump the brakes with the window down. The crack the whip effect that troubles trucks with trailers. Which trailer should come first behind the tractor? Their drawbars differentiate them. The driver must yield the right-of-way to other vehicles when merging and when entering a highway from an alley. Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. 0000002446 00000 n If you do, there is a problem. Any items you have not completed will be marked incorrect. Speed for other vehicles is often too fast for a multi-combination unit! They provide the air pressure used to operate trailer brakes. It depends on the load 0000006195 00000 n the road is dry & visibility is good. Make sure you have large enough gaps before entering or crossing traffic. Driving doubles/triples is also more dangerous in hot and cold weather driving, as well as on mountain roads. 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? 9 should remain in the closed position. You will speak with recruiters today. Air flows steadily and isentropically through a passage. You should keep at least ____ seconds of space ahead of you. That there is some space between the upper and lower fifth wheel. recouple. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. Doubles and triples take up more space than other commercial vehicles. A vehicle transporting hazardous materials is required to display placards where? Each trailer and converter dolly has one or more air tanks. C. closed, You can release the dolly brakes by: The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. The shortest trailer To help avoid mistakes, colors are sometimes used. New! Which of these is NOT a good thing to do when driving on slippery roads? if you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. We are an independent company focused on providing valuable motor vehicle and permit practice test information. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. You should reduce your speed by about _____ on a wet road. Be more careful in adverse conditions. You can also reach us at (888) 830-2326. 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 shut off valves prevent air from going any further. To check air flows to all trailers, you should let air pressure reach normal then? Then, the air loss from the leak will lower the air tank pressure quickly. Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. B. closed A. for coupled doubles and triples, be sure that the pintle hook is in the open position When connecting the glad hands, press the two seals together with the couplers at a 90-degree angle to each other. Hook dolly to front trailer. 0000007032 00000 n Hb```f``b`c``e@ (Q6_* When connecting a converter dolly to a rear trailer, the trailer height must be adjusted so that it is? What do you check when making a visual check of coupling? d. protein. Open 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. Calculate the Mach number at section 2. Which is most likely to tip over: 7.3 Inspecting Doubles and Triples = Additional Things to Check During a Walkaround Inspection. 0000003977 00000 n D safe speed would be 40 MPH. 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? Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. 0000010705 00000 n You are driving a 100-feet truck with double trailers at 30 mph. A. use the engine brake or speed retarder Closed, free, 8. Air pressure is sent from the air tanks to the brakes by relay valves. These mirrors: C. add "one car length for every 10 mph", Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Incidental Motions & Motions that Bring a Que. securely fastened. Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? You want to lock your combination to a second trailer that has no spring brakes. A. you can steer more quickly and safely if you hold the wheel with one hand 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? S-cam brakes are the most common style brakes on large trucks today. Try our free CDL Doubles and Triples Test Question and Answers Quiz online. A connection device of one axle used to disconnect a semitrailer combination vehicle Should the pintle hook be latched or unlatched when backing a dolly under the second trailer? Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). Doubles and triples must be driven very smoothly to avoid rollover or jackknife. The Verge logo. Any time you have to Leave the emergency line shut-off valve closed and open the service line valve. The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. You have not finished your quiz. If you feel D B. do not need to be checked as often as flat mirrors because they show a larger area You will speak with recruiters today. A. release the spring brakes and check for movement When you are pulling trailers, which of the following statements is true about steering? 0000001775 00000 n b. cell A dolly has lights, air tanks, air relays, air lines, air brakes, ABS, electrical connections, etc. The rear trailer of a triple A. hand valve If the fifth wheel on a coupling is too far forward, the tractor frame may hit? A. allow "much more space" than is needed for ideal driving conditions High Road 2.0! On double and triple combinations, you must make sure that which of these is secure? Each trailer and converter dolly has one or more air tanks. Becoming A Truck Driver is a dream we've all pondered at some point in our lives. then there is a problem with the ABS system. You will have greater length and more dead axles to pull with your drive axles than other drivers. Converter dollies are connected to front trailers with a? What's a converter dolly? 1. Which of these statements about the handling of doubles and triples is true? You are doing a walk around inspection of a double or triple trailer rig. True False True If you want to couple a second trailer to you combiantion vehicle, secure it by using the: Trailer emergency air 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 _____. 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. Which the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. C. use controlled or stab braking, The best way to stop any skid is to: 0000001582 00000 n Which diagram shows the best way to turn? B A dolly should be pulled out from a rear trailer using? B Our business address is: Attn: Class A Drivers MH Sub I, LLC dba Internet Brands 909 N Pacific Coast Highway, 11th Floor El Segundo, CA 90245. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). Unless you are draining the condensation out of the air tank, then the drain valve 60607. 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 full trailer behind a truck 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. 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. Allow more following distance. Never pull any trailer without visually inspecting the fifth wheel locking bar If your tractor protection valve doesn't work properly, then if an air hose starts to leak what could happen? A. fully lowered View More Details. The road is dry and visibility is good. Air valves should be closed on all trailers, Air valves should be open on all trailers, Rear of front trailers: closed, rear of last trailer: open, Rear of front trailers: open, rear of last trailer: closed. The lighter trailer should be in the rear. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. Which of these is the correct answer? If you have traffic on both sides of your vehicle and something is blocking your lane, a move to the right still be best. Should the shut-off valves on the rear of the last trailer be open or closed? Learn more and apply here: TruckingTruth was founded by Brett Aquila (that's me! [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. The dolly will have a yellow lamp on the drivers (left) side. during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? 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. 0000001162 00000 n Use the dummy couplers when the air lines are not connected to a trailer. Why is there still destructive interference? When driving with more than one trailer, which trailer should be the first one behind the tractor? In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. 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. The final procedure when connecting a rear trailer is to? The rear trailers shut-off valves should be closed and the front open. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. Go to the rear of the rig. This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. 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: allow "much more space than is needed for ideal driving conditions". Doubles and triples are extremely prone to control issues and must be B behind the shut-off valve then they need to remain open. 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. There is no obligation whatsoever. When pulling a single trailer with a Shut-Off Valve, the valves must be in the: Trailers built before what year may not be equipped with trailer spring brakes? The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed.