the converter dolly air tank drain valve should be

You may be timed. Some do. You are driving a tractor with multiple trailers. the trailer height is right when: the trailer will be raised slightly when the converter dolly is backed under it. Please visit using a browser with javascript enabled. 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. C You are driving with more than one trailer. Explore now! Once you are finished, click the button below. 0000008187 00000 n A. completely open Then, the air loss from the leak will lower the air tank pressure quickly. you are driving on a slippery road during the day. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. 1 Why should you use chocks when parking a trailer without spring brakes? 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. Converter dolly air tank drain valve: CLOSED. securely fastened. will have a lamp on the drivers side. C [California Commercial Driver Handbook] The weight of a truck: Is a major factor affecting stopping distance. What types of trailers can get stuck on raised crossings? S-cam brakes are the most common style brakes on large trucks today. How can you be sure you supplied air to a second trailer? This is CDL Doubles and Triples Test 3in our original Classic Mode. Never pull any trailer without visually inspecting the fifth wheel locking bar The road is dry, and visibility is good. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. 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. Slow to the safe speed before entering, then accelerate slightly through the curve. If you do, there is a problem. The road is dry and visibility is good. A sudden movement with the steering wheel can result in a tipping over rear trailer. 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. The final procedure when connecting a rear trailer is to? The converter dolly air tank drain valve on coupled double and triple trailers should be: Closed. locked . A vehicle transporting hazardous materials is required to display placards where? If you're only pulling one trailer, the shut off valves should always be closed or else the air will simply escape out the back of the trailer. 0000001354 00000 n Safety fail-safe features of a tractor-trailer converter dolly. 3. High Road 2.0! 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: 2. In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. Be sure air-lines are supported and glad hands are properly connected. While inspecting your converter dolly coupling, you should make sure there is _______ between the upper and lower fifth wheel. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space Slow to the safe speed before entering, then accelerate slightly through the curve. None of the above, 4. C. closed, You can release the dolly brakes by: CDL License Requirements State By State. 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. Be more careful in adverse conditions. Either the front or the rear brakes will not work properly or fully. This will let the rear wheels roll again and keep the rear wheels from sliding. 0000001582 00000 n If loading fails, click here to try again. a. blood B. use only the trailer brakes Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? recouple. When you uncouple twin trailers, the last step is to Converter dollies You want to hook your combination to a second trailer that has no spring brakes. 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. 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. Allow more following distance. converting it into two trailers, A coupling device of three or four axles and a fifth wheel by which a semitrailer can your vehicle is so long that you must swing wide to make a turn. The road is dry and the visibility is good. How can you test that air flows to all trailers? On double and triple combinations, you must make sure that which of these is secure? What is a converter dolly? 10. Hb```f``b`c``e@ (Q6_* Pintle-eye of dolly in place in pintle hook of trailer (s). True or False? None of the above, 5. Make sure to visually inspect the fifth wheel and that the locking mechanism is 0000004689 00000 n On the middle trailer of a set of triples? You are doing a walk around inspection of a double or triple trailer rig. 1) the first one is to pump down the air pressure in the system between 20 and 45psi (pounds per square inch) the trailer air supply will pop out, shutting air off to the trailer. door. You should be sure the converter dolly air tank drain . then there is a problem with the ABS system. Which of these is NOT a good thing to do when driving on slippery roads? Once that's complete, then its an easy push back and the Calculate the Mach number at section 2. 0000007032 00000 n Email Updates When New Articles Are Posted. The number of correct answers. 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. 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. safe speed would be 40 MPH. Use controlled or stab braking When uncoupling a rear trailer, you should remove some weight from the dolly by? Charge the system and pump the brakes with the window down. trailer << /Size 59 /Info 20 0 R /Root 22 0 R /Prev 29211 /ID[] >> startxref 0 %%EOF 22 0 obj << /Type /Catalog /Pages 19 0 R >> endobj 57 0 obj << /S 66 /Filter /FlateDecode /Length 58 0 R >> stream Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? You are driving a 100-feet truck with double trailers at 30 mph. We'll help you make the right choices and prepare for a great start to your trucking career. A. always keep your vehicle to the right side of your lane 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 should hear air escaping, showing the entire system is charged. 0000008166 00000 n re-couple, You can if you want to, it does not matter. 11 True! the crack-whip effect that triubkes trucks with trailers is most likely to cause a tip over when. The application only takes one minute. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Each trailer and converter dolly has one or more air tanks. The road is dry and visibility is good. 0000007487 00000 n C. may have poor traction due to bouncing and wheel lockup, Before you can supply air to the air tanks of a second trailer you need to: Each trailer and converter dolly has one or more air tanks. Many scientists are concerned that the melting of Earth's sea ice will increase Earth's surface temperature. 0000005733 00000 n 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. In an application in which vGS=vDS=Vsupply=1.8V,v_{G S}=v_{D S}=V_{\text { supply }}=1.8 \mathrm{V},vGS=vDS=Vsupply=1.8V, a drain current of 2 mA is required of a device of minimum length of 0.18m.0.18 \mu \mathrm{m}.0.18m. In this order, the shutoff valves at the rear of front trailers, the rear of the last trailer and the converter dolly air tank drain valve should be? All trademarks are property of their respective owners. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? That there is some space between the upper and lower fifth wheel. All other trailer air functions use the emergency line. The dolly tow bar may fly away, possibly causing panic, and making it very difficult Each tank has a drain valve on it, and you should drain each tank every day. dress gifs. The trailer is at the correct height when. 0000005554 00000 n Unlock the pintle hook only if the trailer it is under is loaded, otherwise the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. - Converter dolly air tank drain valve: CLOSED. Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side. That split second that you release the brakes will allow them to match the vehicles road and ensuring it is secure. b. cell If the converter dolly is close to your semitrailer, you should wheel it into position? A A. allow "much more space" than is needed for ideal driving conditions Leave the emergency line shut-off valve closed and open the service line valve. The converter dolly air tank drain valve on coupled double/triple trailers should be: Answer: Closed. B utilize the brakes. Closed, free, 8. 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. Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . Any combination of vehicles with a gross combined weight rating (GCWR) of 26,001 or more pounds, providing the gross vehicle weight rating (GVWR) of the vehicle being towed is in excess of 10,000 pounds. New! The dolly tow bar may fly up, possibly causing injury, and making it very difficult to speed and start spinning again, in turn stopping your skid, All the listed answers would be correct. You will have greater length and more dead axles to pull with your drive axles than other drivers. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested you should avoid traveling next to others when possible. Should the shut-off valves on the trailers be open or closed on a set of double trailers? C. foot pedal, Which of these statements about managing space to the sides is true? B. open; latched fifth wheel, so trailer is raised slightly when dolly is pushed under it. When you uncouple twin trailers, the last step is to Converter dollies You want to hook your combination to a second trailer that has no spring brakes. When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. When uncoupling a rear trailer, your rig should be parked in a straight line on? The best way to keep brakes from getting to hot while going down long grades is to: Go slow and use only light, steady pressure on the brakes. When coupling twin trailers, a converter dolly is. When you do this, you should hear: Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. 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. 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? The crack the whip effect that troubles trucks with trailers. 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. If spare tire is on converter gear (dolly), make sure it is secured. C. use controlled or stab braking, The best way to stop any skid is to: Be certain you are clear at the sides before changing lanes. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. Safety chains secured to trailer (s). A) one inch of space . A By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. A. for coupled doubles and triples, be sure that the pintle hook is in the open position when does the drivers manual say you should disable the steering axle brakes? Their drawbars differentiate them. 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. A. closed; latched Why should you not use the trailer hand valve while driving? We are an independent company focused on providing valuable motor vehicle and permit practice test information. Antilock Braking Systems on Converter Dollies, Converter dollies built on or after March 1, 1998, are required to have antilock brakes. If the fifth wheel on a coupling is too far forward, the tractor frame may hit? The rear trailer does not have shut-off valves. You open the emergency line shut-off valve at the rear of the last trailer and hear air escaping. Should the shut off valves on the rear of the first trailer be open or closed on a set of double trailers? Make a sketch that explains this phenomenon in terms of a feedback loop . B 0000009556 00000 n Page 7-6 Commercial Driver's Manual/2.0 = Be sure air lines are supported and glad hands are properly connected. C. closed; unlatched, Which of these will result in the best control on a curve? The pintle hook? Any trailer with a reduced ground clearance True! Open the emergency line shut-off valve at the rear of the last trailer. 0000010783 00000 n Some large trucks have curved (convex or spot) mirrors. If the air supply in the trailer air tank has leaked away, there will be no emergency brakes, and the trailer wheels will turn freely. When checking your air lines, they must be secure and? 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. Any vehicle, regardless of size, designed to transport 16 or more persons, including the driver. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. during normal operation the brakes of the double/triple trailer are controlled by : which of these will result in the best control on curves? If one air system is very low on pressure _______. doubles/triples flip flop over from quick steering movements more easily than many other vehicles. D Delivering to. Doubles and triples are extremely prone to control issues and must be You may not notice a major leak in the service line until you try to put the brakes on. 10 Park on level ground, put chock on the tires, and charge the air tank. B Hit the article below to see specific information about AOBRDs! Which is most likely to tip over: These dollies will have a yellow lamp on the left side of the dolly Questions You Should Know For Doubles And Triples 1. D D Use only the trailer brakes B. slightly open Doubles and triples must be driven very smoothly to avoid rollover or jackknife. If you feel Converter dollies have spring brakes. Learn more and apply here: The more heavily loaded semitrailer should be in first position behind the tractor. 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 want to hook your combination to a second trailer that has no spring brakes. The word part ferrit- means: 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. 3. All ABS equipped units What do you check when making a visual check of coupling? Our normal business hours are Monday-Friday 8 a.m. to 5 p.m. (Pacific Time). If this lamp is illuminated and does not go out, It depends on the load 8. All rights reserved Site Map. It is important not to let water and oil build up in the air tanks. The shut off valves prevent air from going any further. You wish to turn right from one two-lane, two-way street to another. B. you can almost always stop more quickly than you can turn Ideal for replacing a worn, leaky drain valve on a compressor. You should NOT: which of these statements about managing space to the sides is true? When driving with more than one trailer, which trailer should be the first one behind the tractor? 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. This has the same value as the %%TIME_USED%% Variable on the Final Screen. Any items you have not completed will be marked incorrect. When you do this, you should hear: Which of these statements about emergency steering is true? Speed for other vehicles is often too fast for a multi-combination unit! A driver of a vehicle with double or triple trailers will have greater length and more dead axles to pull, increasing the likelihood of a wreck. [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." You should keep at least ____ seconds of space ahead of you. The lighter trailer should be in the rear. A. fully lowered you should not, when you turn with the tractor/triple trailer combination the wheels that offtrack(cheat) the most are. These valves permit closing the air lines off when another trailer is not being towed. Be sure pintle-eye of dolly is in place in pintle hook of trailer(s). Wait for air pressure to reach normal, then push in the red trailer air supply knob. D A. open C Air will not be available to release the trailer spring brakes (parking brakes). Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. Any time you have to A. hand valve a sudden movement with the steering wheel can result in a tipped over rear trailer, you wish to turn right from one two-lane, two-way street to another. When testing trailer service brakes, you should use? These mirrors: 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. The rear trailer of a triple [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]. 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. When you're finished, check your score and results. When does the "driver's manual" advise disconnecting the steering axle brakes to help However, converter dollies and trailers built before 1975 are not required to have spring brakes. If your tanks have automatic drains, they will keep most moisture out, but you should still open the drains to make sure. 0000010306 00000 n When checking the fifth wheel, you should make sure that it has enough? A converter dolly is If a converter dolly has spring brakes, you release the brakes by You have connected the converter dolly to the front semitrailer and then connected the rear semitrailer to the converter dolly. Doubles and triples must be driven very smoothly to avoid rollover or jacknife. To uncouple the rear trailer in a set of doubles, the shut-off valve at the rear of the front trailer should be: Closed.

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