the converter dolly air tank drain valve should bethomas jefferson university hospital leadership

This has the same value as the %%TIME_ALLOWED%% Variable on the Final Screen. When you do this, you should hear: Which of these statements about emergency steering is true? when driving a truck with more than one trailer, which trailer should be first behind the truck? Release Dolly breaks by opening the air tank petcock or if the dolly has a spring break, use the Dolly parking brake control . Air escape from the open valve You are driving with double trailers and must use your brakes to avoid a crash. When coupling twin trailers, a converter dolly is. By clicking on "Sign Up", you agree to our Terms of Use and Privacy Policy. You should reduce your speed by about _____ on a wet road. To check air flows to all trailers, you should let air pressure reach normal then? You are doing a walk around inspection of a double or triple trailer rig. locked . You are doing a walk around inspection of a double or triple trailer How should you test the coupling? In a certain electronic device, a three-stage amplifier is desired, whose overall voltage gain is 42 dB. 0000008915 00000 n When does the "driver's manual" advise disconnecting the steering axle brakes to help When coupling twin trailers, you should _______ the pintle hook and secure the dolly support in the _______ position. ADVERTISEMENT ADVERTISEMENT 0000007508 00000 n 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. 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). That there is no space between upper and lower fifth wheel. In order to receive your Doubles and Triples endorsement, it is required that you pass the states official CDL written Knowledge exam. This is CDL Doubles and Triples Test 3in our original Classic Mode. When the road is slippery Doubles and triples must be driven very smoothly to avoid rollover or jackknife. axle will have spring brakes due to the weight of the unit. Any trailer with a reduced ground clearance Open You are driving with more than one trailer. Submit your email at the end of the test. A you are driving at night and you must dim your headlights for traffic. 0000010705 00000 n Open the emergency line shut-off valve at the rear of the last trailer. Typically depends on the axle count. This will supply air to the emergency (supply) lines. You can also reach us at (888) 830-2326. Those that do not have spring brakes have emergency brakes that work from the air stored in the trailer air tank. The lighter trailer should be in the rear. B. use only the trailer brakes A. fully lowered B. for doubles and triples, the fifth wheel should be all the way towards the tractor doubles/triples flip flop over from quick steering movements more easily than many other vehicles. What should you check for when inspecting the converter dolly and the pintle hook? Trailer Air Tanks And Shutoff Valves - Page 50. If this activity does not load, try refreshing your browser. A major leak in the emergency line will cause the tractor protection valve to close and the trailer emergency brakes to come on. When uncoupling the converter dolly Why should you never unhook the There is no requirement or exact standard for color coding. The dolly tow bar may fly up If loading fails, click here to try again. But the brakes will hold only as long as there is air pressure in the trailer air tank. All other trailer air functions use the emergency line. These mirrors: make things seem smaller & further away then they really are. 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. In normal operation, trailer service brakes should be operated by? The rear trailers shut-off valves should be open and the front closed. Stay up to date on truck driving industry news. B. slightly open You can find it here: High Road 2.0. 0000004668 00000 n If the converter dolly is close to your semitrailer, you should wheel it into position? When uncoupling a rear trailer, you should remove some weight from the dolly by? To check that the trailer emergency brakes are working properly, you should pull out the trailer air supply control and? Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? Describe what the trailer air supply control does. C 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. Use controlled or stab braking There are more things that can go wrong, and doubles/triples are less stable than other commercial vehicles. 0000010783 00000 n Take special care when pulling two and three trailers. You are driving with double trailers and must use your brakes to avoid a crash. The road is dry and visibility is good. Remember however, that is just a suggestion. When does the "driver's manual" advise disconnecting the steering axle brakes to help keep the rig straight? "Glad hands" are coupling devices used to connect the service and emergency air lines from the truck or tractor to the trailer. View the price and details of this FINSBURY PUMP SYSTEMS 400L (SINGLE STAGE) 5.5HP HONDA GX PETROL ENGINE (18M HOSE) FIRE WATER TANK | Mobile fire units. 0000002446 00000 n The trailer brakes will unlock 0000001354 00000 n 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: Please visit using a browser with javascript enabled. Pull gently against the pin of the second trailer. 0000009577 00000 n What should you check for when inspecting the converter dolly? 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. There is a school zone ahead. you are driving a set of doubles and a set of trailer wheels goes in a skid. Secure converter gear support in raised position. Take special care when pulling two and three trailers. Otherwise, the dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. A Which of these is NOT a good thing to do when driving on slippery roads? There is no obligation whatsoever. Blue is used for the service lines, and red for the emergency (supply) lines. These valves permit closing the air lines off when another trailer is not being towed. More driving knowledge, questions and answers, online practice tests for obtaining a drivers . Time allowed (Requires timer add on). The driver will be required to complete this requirement in three eight hour shifts. Which of the following will occur? A. make things look smaller and farther away than they really are Park the rear trailer against another trailer, chock the tires and lock the trailer Watch the wording of the question AND the answers A safe driver will look for all of the above. You are doing a walkaround inspection of a double or triple trailer rig. The dolly tow bar may fly up, possibly causing injury, and making it very difficult to Compressed air usually has some water and some compressor oil in it. open, closed, closed: Term. Locking jaws open 2. D The emergency line valve open and release air When uncoupling, you should never unlock the _______ with the dolly still under the rear trailer. 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. 0000008166 00000 n To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space C. use stab or controlled braking, Which of these is true? The last trailer in a combination is most likely to turn over. Which is most likely to tip over: D You are doing a walk around inspection of a double or triple trailer rig. To prevent trailers from rolling over, you must steer gently and go slowly around corners, on ramps, off ramps and curves. Seriously! However, converter dollies and trailers built before 1975 are not required to have spring brakes. True or False? Converter dolly air tank drain valve: CLOSED Air lines supported and glad hands properly connected. This has the same value as the %%PERCENTAGE%% Variable on the Final Screen. Opening the shut off valves on the rear most trailer will ensure the lines are flowing Doubles and triples are extremely prone to control issues and must be The application only takes one minute. You are driving a 100-feet truck with double trailers at 50 mph. second trailer will be connected, The dolly will have a yellow lamp on the left side, The dolly will have a yellow lamp on the right side, The dolly will have a red lamp on the left side, The dolly will have a red lamp on the right side. with the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. 0000010306 00000 n What three methods can you use to secure a second trailer before coupling? 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. 7. 3. S-cam brakes are the most common style brakes on large trucks today. Some do. True! Therefore, it is very important for safety that you use wheel chocks when you park trailers without spring brakes. To do this without wheel chocks you should: Empty trucks: When parking your double or triple combination, you should look for a parking space your vehicle is so long that you must swing wide to make a turn. A 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. How do you check to make sure trailer height is correct before coupling? You are visually checking the coupling of a converter dolly to the rear trailer. When you do this, you should hear: For emergency braking you should: A Push the brake pedal as hard as you can and hold it there B In bad weather, slippery conditions and mountain driving, you must be especially careful if you drive double and triple bottoms. The shut off valves prevent air from going any further. Your tractor protection valve control should pop out, or go from normal to emergency position, when air pressure falls into what range? %PDF-1.2 % Which of the following will probably happen if you are driving a double rig and a set of trailer wheels goes into a skid? They are filled by the emergency (supply) line from the tractor. You are driving a 100 ft twin trailer combination at 50 mph. You are driving with double trailers and must use your brakes to avoid a crash. 0000006836 00000 n Only trailers designed to be pulled with another trailer behind it will have a shut off valve. The number and size of air tanks varies among vehicles. A. open the shut-off valves at the rear of both trailers Make sure the converter dolly air tank drain valve is closed. 9 Questions You Must Ask, Decide if Truck Driving is The Correct Career Path, Do Not Sell or Share My Personal Information. Please use the form below to contact our customer service or sales team. The lightest trailer The dolly tow bar may fly away, possibly causing panic, and making it very difficult 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. retrovirus $_____________________________$. TestPermit.com is not affiliated, endorsed, or sponsored by state agencies or any motor vehicle and any other departments in the United States, Canada, UK. Open. You shouldn't stop braking. What should you check for when inspecting a converter dolly? A. opening the air tank petcock Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Slow to a safe speed before entering the curve, then coast through the curve. Use the dummy couplers when the air lines are not connected to a trailer. A low air buzzer will go off indicating something is wrong and either the front or the You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____. Always test the trailer brakes before driving with the hand valve or by pulling the air supply (tractor protection valve) control. you are visually checking the coupling of a converter dolly to the rear trailer. you are doing a walkaround inspection of a double or triple trailer rig. Doubles and Triples CDL Practice Test - Class A Drivers Hit the article to see the way to back up your trailer like a pro! Then, the air loss from the leak will lower the air tank pressure quickly. You should keep at least ____ seconds of space ahead of you. 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. When inspecting a converter dolly What should you check for? 10. You should keep at least ___ seconds of space ahead of you. 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. On a triple combination, the shutoff valves at the rear off the middle trailer should be? 0000005345 00000 n When inspecting the air brakes on doubles and triples, you wait for air pressure to reach normal, then push in the red trailer air supply knob. Feel Free to add additional fields for the Quiz Taker to complete using the "Add Fields" options to the right. A. you can steer more quickly and safely if you hold the wheel with one hand You may not notice a major leak in the service line until you try to put the brakes on. A) closed . Any time you have to The heavier trailer should be in the rear. If the spring brakes do not release when you push the trailer air supply control, check the air line connections. D 21 0 obj << /Linearized 1 /O 23 /H [ 1162 213 ] /L 29759 /E 11109 /N 7 /T 29221 >> endobj xref 21 38 0000000016 00000 n 9. 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. Time limit varies by state. What does the Driver's manual say about how much space you should keep ahead of your truck? B. allow one vehicle length for every 10,000 lbs of gross vehicle weight Open the emergency line shut-off valve at the rear of the last trailer. Visually check to make sure that the lead trailer is slightly higher than the center of coupled to the rear of a tractor-trailer combination forming a double bottom rig, Careful of the wording! Each trailer and converter dolly has one or more air tanks. A A CDL is required to drive any of the following vehicles: A vehicle with two separate parts - the power unit (tractor) and the trailer. Did you know you can fill out one quick form here on TruckingTruth and apply to several companies at once for paid CDL training? Why should you pull a dolly out from under a trailer before you disconnect it from the trailer in front? 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. A connection device of one axle used to disconnect a semitrailer combination vehicle can and will get stuck on a raised railroad crossing. When checking your air lines, they must be secure and? The trailer is at the correct height when. 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. 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. safe speed would be 40 MPH. You should keep at least ____ seconds of space ahead of you. How To Use Cruise Control Effectively As A Truck Driver. (done) Chp 23: Cash Flow + Working Capital, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. 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. A turn of the glad hand attached to the hose will join and lock the couplers. None Be certain you are clear at the sides before changing lanes. the road is dry & visibility is good. 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. Do converter dollies have spring brakes? You should be sure the converter dolly air tank . A thorough pre-trip inspection should catch any major service line leaks before you begin your trip. The word part ferrit- means: A sudden movement with the steering wheel can result in a tipping over rear trailer. Allow more following distance. Once you are finished, click the button below. The shortest trailer Older trailers do not have spring brakes. The dolly tow bar may fly up, possibly causing injury and making it very difficult to re-couple. When turning a double or triple at an intersection, the turn often cannot be completed without swinging wide. When only pulling one trailer, be sure the shut-off valves are all in the fully closed position. Which trailer should come first behind the tractor? If there is air there, then there is air towards the cab You want to hook up to the first trailer, then the converter dolly while it is lined up in When you do this, you should hear: Ais escape from the open valve. Air pressure is sent from the air tanks to the brakes by relay valves. You are driving a 100-feet truck with double trailers at 30 mph. Usually need a glad hand converter How can you test that air flows to all trailers? Remember, the service line is not used unless you depress the brake pedal or use the trailer hand valve. 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. Stop the vehicle by gearing down and sparingly You are driving with double trailers and must use your brakes to avoid a crash. If one air system is very low on pressure _______. You need to be aware of how parking lots are arranged in order to avoid a long and difficult escape. If not, there is a problem. How can you be sure you supplied air to a second trailer? Newer trailers have spring brakes just like trucks and truck tractors. The total number of questions. The road is dry and visibility is good. Trucks with trailers have a dangerous crack-the-whip effect. PDF Doubles and triples 1. The stopping distance for a tractor trailer A) one inch of space . On the first trailer in a set of doubles? How many different ways of coupling and uncoupling trailer combinations are there? A and ensuring it is secure. Why is there still destructive interference? 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 _____. Provides a snug fit to eliminate unwanted seepage of air or water. C D For emergency braking you should: 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. 2) the second test is to go out to the trailer to ensure that the parking brakes have indeed applied. Pickup at South Loop. While inspecting your converter dolly coupling, you should make sure there is _____ between the upper and lower fifth wheel. 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. A 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: Sometimes, metal tags are attached to the lines with the words service and emergency stamped on them. Either the front or the rear brakes will not work properly or fully. PDF Section 7: Doubles and Triples - CDL Study C. fully raised, Which of these statements about speed management and braking is true? What's a converter dolly? Eventually, the air will leak away, and then there will be no brakes. Each trailer and converter dolly has one or more air tanks. 60607. To do this without wheels chocks you should: Supply air to the trailer air system with the tractor and then disconnect the emergency line. 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 _______. Some vehicles have dead end or dummy couplers to which the hoses may be attached when they are not in use. C. closed, You can release the dolly brakes by: 0000002636 00000 n C Any trailer, 7. 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: You need to stop braking because it's necessary for you to speed up, When you are in a drive-wheel braking skid, the first thing to do is STOP BRAKING! will have a lamp on the drivers side. The dolly will have a yellow lamp on the drivers (left) side. They are filled by the emergency (supply) line from the tractor. The road is dry and the visibility is good. We are an independent company focused on providing valuable motor vehicle and permit practice test information. A dolly should be pulled out from a rear trailer using? Correct answer percentage. A-dolly. 0000006383 00000 n 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? That there is no space between upper and lower sixth wheel. C If your tractor protection valve doesn't work properly, then if an air hose starts to leak what could happen? unsafe slow down even further, or better yet, find a safe haven and park until the NPT thumbscrew style design enables easy installation. 1/3 For example: If you are traveling 60 MPH and it begins to rain, your suggested If there is a trailer You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____. A. for coupled doubles and triples, be sure that the pintle hook is in the open position The front trailer in a set of double trailers is most likely to turn over due to the Crack-the-Whip effect. Like a trailer, a dolly equipped with ABS will have a yellow indicator light on the left side.

Does Waffle House Pay Weekly, Sullivan County Property Tax Due Date, Piolo Pascual And Kc Concepcion Wedding, Guggenheim Partners Vice President Salary, Articles T