which of the following can cause brake system dragging

Answer B, glazed . Answer: The grinding sound may be something caught between the backing plate and rotor. A. Which of the following can cause brake system dragging? Brake Pull: Uneven braking means that you have one front brake on your Chevy that is not operating properly. Step 1: Access the drum brake adjustment star wheel. Brake drag often occurs when the fluid in your system overheats. Next, hold your foot to the pedal while starting the engine. 4-wheel disc brakes on a vehicle are causing brake squeal. The steering wheel vibrates all the time and always veers to the left. c. with the vacuum hoses removed If it the booster, check valve, or vacuum hose is bad, it will likely also cause a vacuum leak and rough engine idle as well, but an engine with a bad valve or head gasket can also cause low vacuum which can effect the brake boost. Brakes that Grab: If there is oil, brake fluid or grease on the pads, they will slip and then grab hold. Continue with Recommended Cookies. A only Air and vaporized fluid are compressible and, if allowed into a hydraulic brake system, the brake pedal will feel spongy and the force transmitted to the lining will be reduced. d-Neither A or B Both A and B All of the following can cause brake system dragging, EXCEPT: a-stuck caliper piston b-misadjusted master cylinder pushrod length c-restricted brake line or hose d-internal master cylinder leak Internal master cylinder leak Which of the following frictional brake systems is used on vehicles today? B. Use the relative acceleration method to graphically determine the linear velocity and linear acceleration of the piston. a. b. There are different causes for brake drag. Some vehicles have __________ openings in the backing plate to allow for manual adjustment of the brake shoes. Fluid will not run from the master cylinder while you remove it. d. Neither A nor B. An example of data being processed may be a unique identifier stored in a cookie. Correct answer B-If the amber light is on it indicates an ABS fault and the system will revert to regular brake operation without ABS. The first step when diagnosing a problem with caliper mountings, slides, and pins is to: The purpose of the lugs on the backing plate is to: On some pads, the depth of the groove is set so: Disc brake pads consist of friction material ________ or _________ onto a steel backing plate (disc brakes). c. Both A and B C. Both Technicians If you try to fix it by adjusting the rear drum brakes, you will still have the problem until you fix the adjusters. If the impact occurs in 0.06 s, determine the average impulsive force acting on the car. Correct answer C-Both techs are correct. If your rear drums are the cause of the brake pulsation, you will feel the pulsation at this time, and the car will shake when the emergency brake is applied. The brakes are being bled on an older vehicle equipped with a quick take up valve in the master cylinder. a. Technician A says to verify the wheel speed sensor operation and compare all four wheel speed sensor outputs to the data list. Correct answer B-Having a seized caliper piston leads to a high pedal. If the piston is stuck, and the fluid pressure can't push it back into the bore easily, the pressure on the pads will be uneven and the car will pull. Question: A year and a half ago (from 78,000 to 88,000 miles), I had the whole brake system replaced, i.e., pad, rotor, and lines. I recommend having all the brake lines, calipers, and the master cylinder checked for leaks. Brake Squeal:A vibration between the pads and the calipers or the pads and the rotors can cause them to squeal. A worn or corroded master cylinder bore causes excess pedal effort resulting in dragging brakes.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'freeasestudyguides_com-medrectangle-4','ezslot_3',116,'0','0'])};__ez_fad_position('div-gpt-ad-freeasestudyguides_com-medrectangle-4-0'); Brake Lines and Hoses: There may be pressure trapped in the brake line or hose after the pedal has been released. b. When you remove the master cylinder, you must take all these steps EXCEPT: Correct answer D-Draining the master cylinder isn't required. B only a. You could also have a ballooning brake hose when the brakes are applied. b. b. Replacing sealed wheel bearing Technician A Replacing your tires will fix this, or you could try rotating your front tires to the rear of the vehicle. c. Both A and B It can also be due to a corroded or jammed caliper piston or a caliper that has corroded bushings or mounting pins. First, it can act like a restrictor in the line. This article takes a closer look at three common culprits. Brake problems can be daunting if you don't know what's causing them. The brake pedal starts to feel spongy and low even though all the adjustments have been made according to the specifications. You wouldnt pack your own parachute on your first jump, would you? If the slide pins are your problem, they need to be cleaned and lubricated or replaced. The wheel cylinder is attached to the ________. Worn drums may also cause shuddering or pulsating that will become noticeable once you step on the pedal. Object B has initial momentum pB,i=4,6,0kg.m/s.\vec{p}_{B, i}=\langle 4,6,0\rangle kg. Checking your brakes at regular intervals is a goodpractice towards the maintenance of your Chevy. Cause: Rear Wheel lockup or squatting has many causes. Brake fade is loss of stopping power that occurs when excessive heat reduces friction between brake shoe linings and drum. Answer: It is most likely either a blockage in the line or a worn brake master cylinder. Seized wheel cylinder piston Smith, Michael Abbott, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. A routine inspection would include all of the following EXCEPT. A. ASE A4 Practice Test. c. Both A and B A. On ABS vehicles, the ABS pump or the high-pressure accumulator can be the cause of power loss. You have questions like: Will my brakes fail? If you are trying to bring a project car back to life, but can't get it to roll, chances are this is the problem. B. A only Replace the brake linings If nothing happens, check the vacuum connections, and if they are okay, you need a new booster and vacuum hose. Technician B is wrong because a faulty residual check valve if used will cause a spongy pedal due to the ingress of air. If there is fluid, but it is below the full indication, that may indicate that the friction material on the pads or shoes,or the rotors or drums themselves, may be worn beyond effectiveness. Question: Will a bad master cylinder cause the calipers to stick? It's good to understand what the cause of your problem might be before a mechanic starts talking about the need to replace this or that. If the brake drums are worn excessively they can cause vibrations that may be felt in the pedal. d. Neither A nor B. The ABS (antilock brake system) and TRACTION OFF indicator lights remain ON with the engine running. A drum or rotor that has deep scores in it will cause the brakes to grab. Note: I dont recommend pulling up on the emergency brake handle at high speeds, it can cause your rear brakes to lock up and send the vehicle into a spin causing death or serious injury! Every car since 1968 has had redundant hydraulic systems, not to mention the parking/emergency brake, to prevent complete brake failure. Correct answer C-A short push rod length will have to travel farther for contact and result in excessive pedal travel. Second, it can act like a check valve. The vacuum booster can be checked by pumping the pedal a few times while the engine is off. Correct answer D-Both of these techs are wrong. You could try having a fine cut done to the brake shoe surface of the drums and lightly sand them after the cut, or replace the drums. You can buy an overhaul kit for calipers, but they are hard to find and your caliper may not be worth bringing back to life. Technician B says the wheel's direction of rotation can be verified by looking at the wheel direction on the scan tool data list. That's why the power assist begins to function properly after the engine runs. To do this test, drive your car in a remote location with no traffic at a speed of about 30 miles an hour. 1) Caliper Slides The caliper has grooves which secure the brake pads in place and allow the pads to slide inward after you put your foot on the brake pedal. Step 2: Adjust the star wheel. Dragging brakes must be repaired because it results in overheated parts and possible damage to the brake system. All the other answers could occur. Should I drive my car? If it the booster, check valve, or vacuum hose is bad, it will likely also cause a vacuum leak and rough engine idle as well, but an engine with a bad valve or head gasket can also cause low vacuum which can effect the brake boost. A spongy brake pedal may be caused by: Correct answer B-If the amber light is on, it indicates that there is an ABS fault. Brakes that Drag: Dragging brakes cause the brakes to wear out faster, and they can cause steering pull and tire wear. Technician A is wrong because recalibration is not required for these sensors. Assume the brakes are not applied. Buying a new caliper may cost more but you will make up the cost with the time you save. Answer A, zero brake pedal free travel, will cause a dragging brake condition, but not pulsation. Who is right? Hard Pedal- It takes much more pressure to get the same amount of pedal travel and braking force. Answer: I recommend checking the brake light switch, it may be out of adjustment and applying a little pressure to the brake pedal. a. In Fig. a. Spalling I recommend having this area of the brakes inspected first. Technician B says a defective wheel displays looseness or excessive play in the steering wheel especially while driving over rough road surfaces. The other three answers wouldn't cause the same issues. Technician A says to check for ABS or TCS (traction control system) diagnostic trouble codes. Here are five of the most common brake problems I run into, starting with the most serious. Bad front tires, or broken belts in a front tire, could cause it. What could be the issue? You shouldn't waste your valuable time trying to rebuild it. The other choices do not affect this concern. A master cylinder may fail in two ways: internally or externally. Answer: Either the brake pads need to be replaced, or you could try shaving off the leading rear edge of the brake pad at a 45-degree angle and see if that helps. Check out the system to make sure that you do not have a caliper leak or an oil leak. B only All the other answers are improper ways of adjusting drum brakes. Find out what these noises mean and what might fix them. d. Neither A nor B. Technician B says air trapped in the hydraulic system could be the cause. Many times the cause of an accident will be due to a problem with the brakes. For the compressor linkage, at the instant shown, the crank is rotating counterclockwise at 2000rpm2000 \mathrm{rpm}2000rpm and accelerating at 10,000rad/s210,000 \mathrm{rad} / \mathrm{s}^210,000rad/s2. Can you help me understand where the problems are and what I should repair or replace? The brake pedal is firm when applied. What can cause this? Correct answer C-Both technicians are correct. Technician B Which of the following would NOT cause a disc break to drag? Answer: The brake fluid temperature rising and pressure building in the brake system. D. Brake pedal pulsation. A soft brake pedal is a MAJOR brake issue. I put new calipers, rotors and rubber lines on a couple of months ago and now the calipers stick sometimes. B. Technician B says that the star wheel assembly should be lubricated on the floating end. See less 79 RC bought from original owner in 2006 Fear of the unknown causes anxiety. Brake fluid expands as brake fluid temperature rises from normal braking. Seized caliper piston Typically a seized caliper or pads will cause a burning smell, a pull to one side, and dragging at one wheel, but it is possible for it to stick without those, and effectively lessening your braking by nearly half (if it is a front wheel, which provide 75% of the braking). Your brakes pull to the good side. Even with proper maintenance, you may find yourself with an unexpected brake problem -- here are some of the most common examples. Another cause of a hard brake pedal can be a brake caliper that is stuck or seized. Low Brake Fluid:Your Chevymay develop a leak in the system that will result in the fluid level going down. The braking systems commonly found on modern vehicles are composed of several components that work together to slow and stop the vehicle. It sounds to me like some components aren't moving freely and are getting stuck causing the pulling and noises. B. Low Brake Pedal:This can occur if the rear drum brake shoe adjusters happen to be rusted or sticking. Technician B The caliper can also freeze up if the caliper slide pins have lost lubrication because they have not been maintained properly. Tech A states that in the Traction Control System, the control unit can independently apply individual brake units even though the driver is not stepping down on the brake pedal. You can also verify it by looking at the direction on the scan tool data list. The star adjuster should be adjusted one full turn to back the shoes away from the drum. Technician B says backing off the castle nut will cause the bearing to overheat. Technician B says the cause is a faulty residual pressure check valve admitting air. Replace the hydrobooster. Within disc brake calipers, the pistons are sealed by a: Which of the following take(s) up the clearance as disc brake pads wear? If the brake fluid reservoir is full and there are no signs of leaks, the problem is usually an internal problem that you cant identify just by looking at the master cylinder. C. The star adjuster should be adjusted until a slight drag on the wheel occurs. If the drum is machined beyond its limit, the contact surface moves further from the shoes. Question: My Chevrolet 2006 has some braking problems. A faulty proportioning valve or master cylinder could also cause a pull to one side when braking; this is unusual but it does happen. Use the lens-maker's equation to design three different thin diverging lenses, each having a focal length of 27.0cm27.0 \mathrm{~cm}27.0cm and each made from glass that has an index of refraction of 1.601.601.60. Correct answer B-Disc brake squeal is caused by the brake pad moving while braking. Brakes, when applied must not disrupt steering geometry. Technician B says the new rotors should be indexed to the hub using a dial indicator for the least amount of runout. A only Who is correct? A check valve that is faulty can also let vacuum bleed out. Mechanical fading is when the drum gets too hot and expands away from the linings. If you dont find your issue here, check out my article on brake noises, look through the comments at the end, or leave a comment yourself telling your story. Question: My Chevrolet 2006 has some braking problems. A vehicle with 4-wheel disc brakes has a brake squeal. They are not compensating for normal lining wear. This drag happens with drum brake systems as the springs wear or become rusty. Another uncommon cause of a soft pedal and long travel, is a bad wheel bearing, which is unrelated to the brakes except for being in the vicinity of the rotors. Correct answer D-Both technicians are wrong. Who is right? Correct answer D-Both technicians are wrong because this is how power brakes are supposed to operate. The steering wheel vibrates all the time and always veers to the left. c. Replacing a ball joint Technician A says to verify wheel speed sensor operation, compare all four wheel speed sensor outputs to vehicle speed on the data list. If your car sits for long periods without moving, moisture from rain or high humidity causes your rotors to rust, except for the patch of rotor surface where the pads rest. The caliper piston needs to move back into its bore with no binding. B only The first thing you should do is check your brake fluidlook in your owner's manual to see how. Always use OEM recommended clips and anti-squeal shims. Check your brake hoses for anomalies. This article also includes a repair technique for noisy drum brakes that I found by trial and error. I replaced master cylinder already. Over time, a caliper can freeze up gradually, a process that can go unnoticed for a long period of time. A only With the brakes applied on a vehicle with power brakes, the pedal moves down slightly when the engine is started. Push and hold the release button on the end of the emergency brake handle; this is so the emergency brake does not lock into place and can be released easily. Most instances of a hard pedal come down to a failure in the power boost system, whether vacuum based or hydro-boost (used mostly on diesels, we won't be covering it here). Technician A is wrong because the parking brake would only affect the red brake light. Who is right? Bleed the brake lines as recommended by Chevy to fix this. For more information about ASE, visit the official ASE website at www.ase.com, Copyright 2008-2023 All Rights Reserved Privacy Policy Disclaimer Sitemap. Answer: The first thing you need to do is remove all four wheels and inspect all caliper slide pins, pistons, and brake pads and shoes. Who is correct? Every rotor has a "minimum spec" for thickness, usually stamped on the rotor near the hub where the lug nuts are. On some vehicles, disc brakes are equipped with a steel scratcher that: Brake pad wear indicators may be either mechanical or: Which tool is used to measure the useful life of brake linings? DOT 3 brake fluid should not boil until it gets above 400 degrees Fahrenheit, but old brake fluid that has absorbed water can boil at as little as 284 degrees, which is why it needs to be changed every other year. C. Both technicians Technician B says that the star wheel assembly should be lubricated on the floating end. The ABS light doesn't go off after the engine starts. A hydroboost power brake vehicle with a hard pedal can be the result of a belt that is loose on the power steering pump, fluid levels are low, power hoses leak or there are valves with leaks or faults on the hydroboost unit. You could add shims, use a brake noise aerosol, or brake grease to the backs of the pads to dampen the noise. d. Repair leak and replace brake linings. Much like our earlier examination of clutch issues, there are two general failure modes for brakes: They aren't engaging well enough, or they aren't disengaging. The plugged compensator port leads to dragging brakes instead. An automobile has a weight of 2700 lb and is traveling forward at 4 ft/s when it crashes into the wall. a. To perform a thorough inspection of brake pads, you should do all of the following EXCEPT. 2320, what is the phase relationship between This problem could be caused by a bad: Another possibility is that the pistons got bent, during a brake job or a car accident, and can't move freely anymore, causing the caliper to bind and limiting the amount of pressure to the pads. Another cause of a hard brake pedal can be a brake caliper that is stuck or seized. Who is correct? 100100100 This leads to the brakes dragging. Who is correct? If you have this type of rear braking system, it is almost impossible to isolate the rear brakes. ASE identifies suspension both . What's more, I'll teach you to fix it in either case. Technician B _____ Slows a vehicle by converting the vehicle's kinetic energy into electrical energy. d. Neither A nor B. C. Brake adjustment In this article, I will explain the most common reason for a slipping automatic transmission and the most common reason for a slipping standard transmission. a. Check your pads for any type of contamination. Technician A says the vacuum supply test involves inspecting the vacuum supply hose for kinks. A only Correct answer A-You must adjust the star adjuster until there's a slight drag on the drum. Before we get into the specifics of brakes and their problems, you may want to look at some of the basic rules for troubleshooting in general, as written in the beginning of every Haynes manual: Troubleshooting 101. D. Noticeable brake pulsation. D. Low brake fluid. Pulsation results from something loose in the system or by an unparallel rotor. Master Cylinder: An incorrect brake pedal adjustment can cause brake drag. Question: What makes a car's disc brakes drag hard after a 15-minute drive? It's possible your ABS module is no good. Technician A Technician A says you torque the adjusting nut to a specified torque and back off the nut till it lines up with the hole and install the cotter pin. Which of the following can cause brake pedal pulsation? b. Wash in hot, soapy water and dry. If you don't know what to look for, have a mechanic who knows what they are doing and are reputable to inspect the brakes. To reduce this, the mating surfaces need to be cleaned and lubricated. Poor stopping A. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Continue scrolling to learn more about these common issues and their solutions. Technician B says disc brake squeal is often caused by movement of the disc brake pad during braking. D. The star adjuster should be adjusted until the shoes hold the wheel in place firmly. The consent submitted will only be used for data processing originating from this website. Here are five of the most common brake problems in cars. Rotors should be refinished when there is scoring, heat spots, lateral runout, pedal pulsations or thickness variation. Which of the following conditions can cause brake pedal fade?

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