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). Correct answer B-Having a seized caliper piston leads to a high pedal. Use the relative acceleration method to graphically determine the linear velocity and linear acceleration of the piston. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Which of the following could cause a pulsating brake pedal on a truck with hydraulic brakes? Chapter 45: Servicing Hydraulic Systems and P, Chapter 16 Activity: Reconstruction and Resis, Study for Chapter 11: Health and Wellness, Introduction to Chemical Engineering Thermodynamics, Hendrick Van Ness, J.M. Which of the following can cause brake pedal pulsation? All modern cars come with sophisticated antilock braking systems (ABS) and brake based stability control, which complicates some aspects of troubleshooting and repair, but those systems will inform you when there is a problem and default to the old, simple system. Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. c. Low brake fluid d. Fluting. The correct answer is C. Of the choices given, only an out-of-round brake drum can cause pulsation in a hydraulic brake system. Second, it can act like a check valve. Sketch each of your designs. B only The backing plate has holes stamped in it for all of the following to pass through, EXCEPT ______. c. Replacing a ball joint Technician A is wrong because the parking brake only affects the RED Brake Light not the amber. This article is accurate and true to the best of the authors knowledge. When you are in a crisis situation like a brake problem, some mechanics will take advantage of the customer and over-sell the work that really needs to be done. C. Both technicians Brakes Dragging | The Causes of Brake Drag Explained Then you should try the brakes. Glazed shoes or pads cause brake fade resulting in a loss of friction and reduced braking performance. b. If the vehicle has low or uneven tire pressure, there might be a pull. Erratic brake pulling occurs on a vehicle when the brakes are applied. Technician B says when this happens the brakes will operate like a normal non-ABS brake system. B. What do you think it might be? Al+ClX2AlClX3\ce{Al + Cl2 -> AlCl3} 3 Basic Kinds of Valves in a Non-ABS System. A restricted disc brake caliper hose might cause all of these EXCEPT: D. Neither technician. Technician A says excessive brake pedal freeplay could be the cause. . c. Both A and B d. Neither A nor B. Brake Squeal:A vibration between the pads and the calipers or the pads and the rotors can cause them to squeal. A check valve that is faulty can also let vacuum bleed out. This difference in pressure happens when the line is pinched or kinked and leaves the brake unit applied and dragging. Meanwhile, pull up on the handle just enough to feel the rear brakes grab slightly. d. Neither A nor B. Correct answer A-You torque an adjusting nut to a specified torque and back off the nut till it lines up with the hole and install the cotter pin. b. with the engine running Brakes, when applied must not disrupt steering geometry. The master cylinder seems to be okay. Technician B is wrong because a faulty residual check valve if used will cause a spongy pedal due to the ingress of air. Rear Brake Drag or Lockup - Drum Brakes - Phoenix Systems Correct answer B-If the amber light is on, it indicates that there is an ABS fault. Pulsation results from something loose in the system or by an unparallel rotor. d. A faulty power booster. The other complaints wouldn't occur as a result. Binding pedal linkage would lead to a hard pedal, which is also true for a dented brake line. Technician A says excessive rotor run out could be the cause. Braking: Car Pulls to One Side - Tomorrows Technician Answer: The most likely cause is a caliper sticking, either it's the piston or slide pins. Correct answer B-Disc brake squeal is often caused by movement of the disc brake pad during braking. D. Low brake fluid. Any brake booster (whether from Master Power or any other supplier) needs a vacuum source to operate. 3 Hydraulics-Related Sources of Brake Drag 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. A properly working booster will make it easier to hold the pedal and may even slightly depress the pedal by itself. First, it can act like a restrictor in the line. An often-misdiagnosed cause of pull is a collapsed brake hose. Using the screwdriver, gently pry out the rubber grommet that protects this access cover. How to Replace Honda Brake Pads: Tips and Precautions. Technician B says backing off the castle nut will cause the bearing to overheat. B. Some vehicles have __________ openings in the backing plate to allow for manual adjustment of the brake shoes. Technician A says the yaw rate and deceleration sensor should be recalibrated. A vehicle has a very erratic brake pulling concern while applying the brakes. Object B has initial momentum pB,i=4,6,0kg.m/s.\vec{p}_{B, i}=\langle 4,6,0\rangle kg. Who is right? A common symptom of this type of braking issue is a burning smell from the amount of heat the hung up brake generates. 4-wheel disc brakes on a vehicle are causing brake squeal. A only d. Repair leak and replace brake linings. tech A states that brake-by-wire means there is no mechanical or hydraulic connection between the break pedal and the wheel break units. Technician B An example of data being processed may be a unique identifier stored in a cookie. b. A. It's worth grabbing a flashlight and looking to see whether the master cylinder is leaking visibly. What could be the cause of the problem? They will need to be resurfaced. 2023 The Arena Media Brands, LLC and respective content providers on this website. As rotors age, they go through the heating and cooling process thousands of times, so it's inevitable for them to lose their shape or trueness. Brake pads are being replaced on a vehicle with four-wheel disc brakes. d. Neither A nor B, A wheel speed sensor is being diagnosed using the OEM (original equipment manufacturer) diagnostic scan tool. Technician A is wrong because excessive rotor runout will cause brake pulsations with no effect on wear. ASE T-4 Brakes Flashcards - Cram.com A. 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. Check and make sure there is free play at the top of the brake pedal after driving and braking for a while, if there is no free play, something is out of adjustment. Question: What causes a brake pedal to depress all the way to the floor in a car? This lubrication will help prevent a possible squeaky noise as the shoes move across the plate. Answer: Yes, brake pads can cause problems for brakes on a car. ABS causing brakes to stick | TDIClub Forums You can also verify it by looking at the direction on the scan tool data list. Next, hold your foot to the pedal while starting the engine. Technician B is wrong because backing off the castle nut will not cause the bearing to overheat. Assume the brakes are not applied. 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. After a master cylinders replaced and the brake system is bled what must happen? The wheel cylinder is attached to the ________. 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. 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. Who is correct? auto tech review 3 Flashcards | Quizlet Five Common Brake Problems in Cars - AxleAddict The common cause of this is a broken or weak retracting spring on drum brakes, corroded or jammed caliper piston, corroded mounting pins or the bushings on a floating caliper, the drum brake self-adjusters are overextended or there is an emergency brake cable that is sticking or is frozen in place. The only fix I recommend for a faulty master cylinder is to replace it with a new one. C. Dragging brakes Who is correct? It also expands when subjected to high pressures. Anything that has rubber in the brake system, such as the brake hoses, calipers, wheel cylinders, reservoir cap, ABS unit, master cylinder, proportioning valves, etc.all become junk. Check out the system to make sure that you do not have a caliper leak or an oil leak. c. Both A and B 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. A only Again, you will have to measure the drums to determine if they can be resurfaced or not. The drum brake adjuster is located under an access cover in the back of the drum brake. Technician A believes that you must depress the quick take up valve. The vehicle pulls to the side under heavy braking A routine inspection would include all of the following EXCEPT. Technician A says the master cylinder pushrod adjustment is incorrect. Step 1: Access the drum brake adjustment star wheel. When that happens, I release the brakes and apply them again super fast. . Technician A believes it's a defective proportioning valve issue. Overview: How To Use OBD-II Scanner to Check Engine Light Codes - What type of scanners are there. Answer: The grinding sound may be something caught between the backing plate and rotor. Here are five of the most common brake problems I run into, starting with the most serious. If it is, you should be able see the fluid on the carpet under your dash, just over your brake pedal. There are only about nine evil mechanics in the world, they just move around a lot! Correct answer D-A restricted disc brake caliper hose won't cause pedal pulsation. Technician A says to check the TCS and ABS diagnostic trouble codes. Thus, there are many ways to design a lens that has a particular focal length in air. Brakes on an older vehicle with a quick take up valve in the master cylinder are being bled. You have questions like: Will my brakes fail? Every car since 1968 has had redundant hydraulic systems, not to mention the parking/emergency brake, to prevent complete brake failure. d. Neither A nor B, The front brake rotors and pads are being replaced on a vehicle equipped with a TCS (traction control system) and electronic stability control system (ESC). Answer: This means that you have a leak in the system and you most likely have air in the brake lines. Even today, your brakes can fail completely, but there are failsafes built into the system to prevent that from happening in most cases. Abnormal noise. The suspension additionally steering service area involves the following components: Steering system, Suspension system, Wheel Alignment and Wheel and Tires Service Log. If you were to remove the line at the master cylinder and at the caliper, could you blow compressed air through it? Answer B, glazed . Technician A Excessive Push Rod Length The brake system in your car contains numerous components, each of which plays a distinct role in braking. 8. a. 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. The ABS light doesn't go off after the engine starts. c. Seized caliper piston on the other side One of the first symptoms of bad or failing drum brakes is unusual brake pedal feel. B. This leads to the brakes dragging. b. Four-wheel alignment This heat can be caused by a dragging brake unit. When the brake pedal gets soft or sinks to the floor, it's generally due to a leak in the braking system, most commonly the master cylinder leaking internally or externally. If you try to fix it by adjusting the rear drum brakes, you will still have the problem until you fix the adjusters. Brake rotors need to be refinished under all of these conditions EXCEPT: The Arena Media Brands, LLC and respective content providers to this website may receive compensation for some links to products and services on this website. DOT 5 Tech A says that quick take-up master cylinders use two additional pistons to move brake fluid faster. d. Neither A nor B. Technician A says to verify wheel speed sensor operation, compare all four wheel speed sensor outputs to vehicle speed on the data list. b. Can you help me understand where the problems are and what I should repair or replace? . c. Leakage past the master cylinder cups Brake drag often occurs when the fluid in your system overheats. Brake pad friction materials may be manufactured from any of the following EXCEPT: makes a noise if the brake pads are due to be replaced. a. With the brakes applied on a vehicle with power brakes, the pedal moves down slightly when the engine is started. B. Who is right? A car that pulls to one side can be annoying and also dangerous. How to Adjust Drum Brakes | YourMechanic Advice Here is the list of possible causes: Service and parking brake adjustment Rear brake hardware Shoe lands or bosses GM clip in wheel cylinders Brake drum condition Brake shoe contamination Brake valving Friction material Then there are minor issues such as brake squealing, brake shudder/pulsing, burning smells, leaking fluids, pulling to one side, etc. a-drum brakes If the brake drums are worn excessively they can cause vibrations that may be felt in the pedal. 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. What could be the issue? Bleed the brake lines as recommended by Chevy to fix this. B only Which technician is most likely correct? c. Both A and B Lubricate slide pins on disc brakes to prevent brake drag and binding. See less 79 RC bought from original owner in 2006 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. Symptoms of a Bad or Failing Brake Hose | YourMechanic Advice Which of the following can cause brake system dragging? Question: I had problems with my brakes grinding and pulling to the right when braking. The other three answers wouldn't cause the same issues. Chevy Brake Problems: Common Issues and How to Fix Them 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. c. VAV_\text{A}VA and ITI_\text{T}IT? Technician B believes that the brakes can't be bled. Correct answer C-Both technicians are correct. b. If the slide pins are your problem, they need to be cleaned and lubricated or replaced. b. Write the correct spelling for Middle layer of skin. It will need replacement or resurfacing. d. Seized caliper piston. a. Technician B says the wheel's direction of rotation can be verified by looking at the wheel direction on the scan tool data list. a. A slow descent of the brake pedal means that the pressure is leaking out of the master cylinder. They can also cause you to use more fuel. b. Within disc brake calipers, the pistons are sealed by a: Which of the following take(s) up the clearance as disc brake pads wear? Another cause of a hard brake pedal can be a brake caliper that is stuck or seized. A. pumping the brake pedal 10 times with the ignition switch on c. Both A and B Then, it needs to be backed off until the wheel begins to spin freely. Tech B states that this function can also be carried out by the driver in manual mode. Technician B says insufficient clearance between the pads and caliper slider could be the cause. ASE A5 Brakes Flashcards | Chegg.com The master cylinder actually contains two pistons and seals, which in simpler systems controlled the front and back brakes separately, or the diagonally opposite wheels, so at worse you would only lose half your brakes. c. Both A and B 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. Answer: It could be a sticking caliper piston, slide pins, or the pads could be corroded in the caliper preventing them from moving freely. 1. ASE PRETEST QUIZLET Flashcards | Quizlet Brake drag is caused by the brake pads or shoes not releasing completely when the brake pedal is released. If the coefficient of kinetic friction between the wheels and the pavement is k = 0.3, calculate the impulsive force on the wall if the brakes were applied during the crash.The brakes are applied to all four wheels so that all the wheels slip. eCFR :: 49 CFR Part 396 -- Inspection, Repair, and Maintenance Here are five of the most common brake problems in cars. Correct answer D-Air causes a gap in the hydraulic fluid flow because the fluid has to compress the air before it can apply the piston. a. Eventually, a sticking brake caliper will wear down the brake pads. 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? c. Parking brake out of adjustment Technician B states that the brakes can continue to operate like non-ABS brakes. Question: My brakes squeak only when I back up. The four noises that car owners complain about most often: CV joint noise, water pump noise, belt noise, and heat shield noise. You also want to use OEM clips and anti-squeal shims. D. Noticeable brake pulsation. Technician A states that the parking brake is not fully released. A low brake pedal can also be due to a fluid leak or worn brake linings. 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. A only Question: My car won't start unless I press really hard on the brakes. If the dust boot that protects the piston from the elements gets torn, water and debris will penetrate the metal in the caliper and cause rust and corrosion. Connect a hose to the caliper bleeder screw and insert the other end of the hose into a suitable container, open the bleeder screw, then use a C-clamp or pliers to slowly bottom the piston in the caliper Technician A says that all 3 channel ABS systems use only 3 wheel speed sensors. I changed the brake pads, but that didn't help much. Technician A says the vacuum supply test involves inspecting the vacuum supply hose for kinks. You will find the booster between the master cylinder and the firewall in your engine compartment. D. 400400400. a. Is it a caliper problem? c. Both A and B Tips and precautions to use when replacing your brake pads, so you can get quality results on a Honda or any other vehicle. The other situations wouldn't be caused by the lack of free play. Tech B Tech A says that the vacuum booster increases the vacuum in the brake system. Correct answer D-Both technicians are wrong because the problem is in the power booster. So im getting drag on my front brakes, both sides, after i drive it about 15-20 miles i jack up the front end the the wheels are real tight to spin by hand and you can hear the pads screeching against the rotor. A. Brake dust is best removed from brake components on the vehicle by using: If a retracting tool is not available, which of the following can be used to retract the pistons in a caliper with non-integrated parking brakes? B. It's possible your ABS module is no good. Question: My Chevrolet 2006 has some braking problems. Answer: Most likely your caliper is defective, if it were the master it would most likely be more then one brake caliper sticking. Sometime a misadjusted brake light switch can cause this, a blockage in a line, a frozen caliper slide pin, or a caliper piston will not more freely are all likely causes. As a rule of thumb, shaking caused by a problem in the front end of the car will be felt in the steering wheel, while shaking in the rear will seem to affect the whole car. Why is this? Correct answer D-Both technicians are wrong because this is how power brakes are supposed to operate. If this is what is going on, you need to identify and replace the faulty part. Correct answer D-The metering valve controls the pressure to the front disc brakes on a combination system and if defective can allow too much pressure causing a lock-up. Personal Injury Attorney With Truck Accidents They following are three of them. Auto Mechanical Practices Test; ASE Test Guide; Auto Mechanic Flash Cards; 2023 Edition. It's a vital component in your car; leave it to the pros. If the impact occurs in 0.06 s, determine the average impulsive force acting on the car. Brake fade is when the brake fluid is contaminated, so it causes a soft brake pedal, air in the lines, leaking master cylinder, frozen or seized caliper pins or piston, worn out pads, and glazed rotors. For more information about ASE, visit the official ASE website at www.ase.com, Copyright 2008-2023 All Rights Reserved Privacy Policy Disclaimer Sitemap. C. Installation of a new brake rotor Brake adjustment What can cause this? A only What is the most likely reason? Question: Sometimes when I apply the brakes, the pedal of my SUV goes very low before stopping completely. 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. An intermittent noise when braking lightly, as in the video below, could also be related to an uneven surface on the rotors. Continue with Recommended Cookies. 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. The backing plate has holes stamped in it for all of the following to pass through, EXCEPT ______. A. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as overextended self-adjusters. If you do, it could be a matter of minutes until you smash into something. C. Both technicians Then, it should be backed off until there's a drag on the wheel. Calculate the following quantities: The total initial kinetic energy of the system. Which of the following can cause brake system dragging? Frank A5Brake Part A Hydraulic system - Chegg variable hours is outside the range 0 through 80. b. I recommend having this area of the brakes inspected first. Question: Does an emergency brake in a car not work after an accident? During brake application pressure is high enough to bypass the kink, but when the brake pedal is released, the spring pressure of the master cylinder is not sufficient for the pressure to bypass the kink. Excessive freeplay delays application and air in the hydraulic system will cause a spongy pedal. 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. Who is correct? Technician B says that the star wheel assembly should be lubricated on the floating end. The same factors can cause cable operated parking brakes to jam up as well, requiring a replacement of the parking brake cable. Then you want to back it off until the wheel starts to spin freely. C. Both technicians If you get no assist, you need a new check valve. It can also be the result in worn disc brake pads. When I apply the brakes, especially downhill, I feel the brake pedal presses itself more than I do. When the brakes are applied, brake fluid is pumped from the master cylinder to the calipers in order to expand the caliper piston and slow the vehicle. The wheel speed sensor is being diagnosed with an OEM diagnostic scan tool. 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. Answer: It sounds like you may have an ABS sensor not reading properly or maybe a damaged ABS sensor wire? You could also have a ballooning brake hose when the brakes are applied. Rotors should be refinished when there is scoring, heat spots, lateral runout, pedal pulsations or thickness variation. Question: My Chevrolet 2006 has some braking problems. That's why the power assist begins to function properly after the engine runs. 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. When I bled the lines, the driver side brake fluid wouldn't come down. I put new calipers, rotors and rubber lines on a couple of months ago and now the calipers stick sometimes. Who is correct? This braking problem can be caused by several different things, even the tires (see below), but the most common cause is a frozen caliper. Who is right? The consent submitted will only be used for data processing originating from this website. a. ABS Diagnostic Trouble Code set A. All of the following can cause brake system dragging, EXCEPT: Which of the following frictional brake systems is used on vehicles today? Be careful with brake fluid; it is very corrosive when it gets on paint. Brake Pull: Uneven braking means that you have one front brake on your Chevy that is not operating properly. Which of these can lead to brake pedal fade? The brake pedal is firm when applied. B only d. Neither A nor B. If your brake pedal feels squishy, "like stepping on a plum," and won't stop on the way down unless you pump it, or the brake pedal sinks to the floor with little or no resistance, you have a dangerous situation and should NOT drive any further! A possible cause of this leakage might be: Correct answer C-A defective hose would not allow the fluid to enter the engine.