b. Arcing Most modern brakes have rotors; older ones have drums, especially in the rear. See less 79 RC bought from original owner in 2006 A drum or rotor that has deep scores in it will cause the brakes to grab. A soft brake pedal is a MAJOR brake issue. Some of the cause of brakes dragging on one or more wheels can be: A seized caliper or brake pads that have become jammed in the caliper is probably the most common failure of this type, and can occur due to age, rust, and salt used on winter roads. Within disc brake calipers, the pistons are sealed by a: Which of the following take(s) up the clearance as disc brake pads wear? Technician A Who is correct? 2. Correct answer D-Both technicians are wrong because this is how power brakes are supposed to operate. Answer: I don't think it has anything to do with the brake, try starting it without doing that and see what happens. Who is correct? Checking your brakes at regular intervals is a goodpractice towards the maintenance of your Chevy. If you were to remove the line at the master cylinder and at the caliper, could you blow compressed air through it? If this is your problem, then the fix is to resurface the rear drums or replace them. Glazed brake pads result from excessive heat. B only Your brakes pull to the good side. Every car since 1968 has had redundant hydraulic systems, not to mention the parking/emergency brake, to prevent complete brake failure. B. Most braking systems work on a diagonal braking design for safety reasons; that is, the left front and right rear brakes work together and so do the right front and left rear. 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! You can diagnose this by starting your Chevy in order to build vacuum, and then turning it off for four or five minutes. If you do, it could be a matter of minutes until you smash into something. Correct answer D-A seized caliper piston could cause the pedal to be high with reduced braking power. To put this discussion about brake proportioning valves in context, there are actually three basic kinds of valves in play in a non-ABS system. In a similar vein, a pinched hard brake line, or a rubber line that has started to come apart internally can cause the same problem, though localized to one or two wheels. Why are X-rays, gamma rays, and fast-moving electrically charged particles potentially harmful to our bodies? Question: My rear inner pads wear down faster than the outer ones. B. loosening the bleeder screw on the accumulator with the ignition switch on d. Brake light is illuminated. This article is accurate and true to the best of the authors knowledge. c. Both A and B Technician A says to verify wheel speed sensor operation, compare all four wheel speed sensor outputs to vehicle speed on the data list. "Scratcher" and "sensor" are types of disc brake pad __________ indicators. The dragging sound could be caused by the brake drum not fully releasing when the brake is released. Then there are minor issues such as brake squealing, brake shudder/pulsing, burning smells, leaking fluids, pulling to one side, etc. Pulsation:This is the symptom of a brake rotor that has warped. If the master cylinder is leaking externally, you will see fluid dripping from the place where the rod goes into the cylinder. Technician B is wrong because a faulty residual check valve if used will cause a spongy pedal due to the ingress of air. Technician B is wrong because backing off the castle nut will not cause the bearing to overheat. You may lose your brakes if you run out of travel before they are fully applied. The master cylinder seems to be okay. Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. If it involves only one of the front brake units, the vehicle will pull to the side with the dragging unit. How To Determine Cause of Brake Drag - Ford Truck Enthusiasts Forums After a master cylinders replaced and the brake system is bled what must happen? A car that pulls to one side can be annoying and also dangerous. The other three answers can lead to a low brake pedal. 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. Technician A says excessive rotor run out could be the cause. b. Four-wheel alignment 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. Technician A D. Neither technician. Brake Noises: What Causes Them and How to Fix Them. Technician A says a parking brake not fully released could be the cause. The brake pedal is firm when applied. To reduce disc brake squeal, all mating surfaces of the brake should be clean and lubricated. A low brake pedal can also be due to a fluid leak or worn brake linings. The residual valve (often in the master cylinder or proportioning valve) keeps a small amount of pressure in the brake lines so the pedal doesn't have to travel so far until initial engagement; a failure here can be difficult to pinpoint. A properly working booster will make it easier to hold the pedal and may even slightly depress the pedal by itself. Who is right? Symptoms of a Bad or Failing Brake Drum | YourMechanic Advice Brake Chatter: Warped or improperly finished rotors will cause this noise. Question: My Chevrolet 2006 has some braking problems. 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. 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. d. Neither A nor B. If a 40 kg person is accelerating at 10m/s^2, then the magnitude of the force acting on him or her is 400 N. Write a C++ statement that prints the message The number is not valid. if the All the other answers are improper ways of adjusting drum brakes. Answer: You have a rear knocking noise from the drums because your shoes are being pulled away from the backing plate and snapped back into place by the spring clips. C. Brake adjustment Technician A They can also cause you to use more fuel. b. Mechanical fade occurs when the brake drum gets so hot it expands away from the brake linings. How to Replace Honda Brake Pads: Tips and Precautions. Brakes Flashcards | Quizlet The steering wheel vibrates all the time and always veers to the left. The tires' contact surfaces expand when you brake, thus putting more pressure on the bad tire and causing the pull to worsen. 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. This problem could be caused by a bad: To perform a thorough inspection of brake pads, you should do all of the following EXCEPT: Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Chapter 15 Test 3 Psych Testing and Measure. Excessive Push Rod Length The brake system in your car contains numerous components, each of which plays a distinct role in braking. Al+ClX2AlClX3. b. Who is right? This patch of uneven rotor surface is called a pad impression and will cause the brakes to pulsate. This also reduces braking power. It does this through a small sliding valve operating on spring pressure. Technician B says the test involves checking the level of vacuum supplied by the engine or vacuum pump. This pedal adjustment is crucial, and if adjusted too tightly, the vent port of the master cylinder can become blocked. C. Both technicians A only With the brakes applied on a vehicle with power brakes, the pedal moves down slightly when the engine is started. We and our partners use cookies to Store and/or access information on a device. If your whole car shakes when your brakes are applied, it could be just your rear brakes. I seem to remember a similar post where the cause was found to be the brake pedal not returning fully, but not noticed by the driver. Technician A says that when reassembling a duo-servo brake, the backing plate pads should be lubricated. The brake pedal starts to feel spongy and low even though all the adjustments have been made according to the specifications. Any brake booster (whether from Master Power or any other supplier) needs a vacuum source to operate. B only When performing a vacuum booster function test, you should begin by pumping the brake pedal several times _______________. I replaced the brake pads again, both calipers and rotors. Correct answer C-Both techs are correct. C. Both technicians The two main types of disc brake calipers are: The disc brake caliper is attached to the, Sliding calipers have pistons that are positioned on, bleed air or vacuum from the power booster, Brake bleeder screws enable all of the following tasks to be performed EXCEPT. d. Fluting. 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. 3 Mechanical Causes of Brake Drag - Radial Tire Service This site is owned/ operated by an authorized GM Genuine Parts/ACDelco Seller. An often-misdiagnosed cause of pull is a collapsed brake hose. A only B only The wheel speed sensor is being diagnosed with an OEM diagnostic scan tool. Low Brake Pedal:This can occur if the rear drum brake shoe adjusters happen to be rusted or sticking. Correct answer B-Disc brake squeal is often caused by movement of the disc brake pad during braking. b. 2320, what is the phase relationship between If you have a soft or sinking brake pedal and are looking for information on what's causing it or what you should do next, you'll find the answers here. Now I have loud grinding sounds coming from the front left tire. The ABS (antilock brake system) amber light does not go off after the engine is started. Tech B says that the faster a vehicle moving, the more braking power is needed. 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. At the first sign of trouble with your brakes, you need to either fix them or seek help from a certified GM mechanic. Brakes that Drag: Dragging brakes cause the brakes to wear out faster, and they can cause steering pull and tire wear. Technician B believes there is an issue with the lateral runout of the rotor. c. Both A and B Continue with Recommended Cookies. Turn the star-shaped adjuster a few times. 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. Correct answer B-Disc brake squeal is caused by the brake pad moving while braking. 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). One safe way to test whether a braking problem is at the front or rear brakes is to drive at a low speed and: (7.1.2) * low brake fluid All of the following can cause brake pedal pulsation, EXCEPT internal master cylinder leak All of the following can cause brake system dragging, EXCEPT fixed and sliding If you determine that you have a leak, check the calipers, hoses, lines, master cylinder and wheel cylinders for the leak. a. c. Both A and B Question: My car has power brakes and used to stop on a dime. It can also be due to a corroded or jammed caliper piston or a caliper that has corroded bushings or mounting pins. What are possible causes? The effectiveness of braking is mostly determined by: Tech A says that the heavier the vehicle, the more stopping power is needed. C. Both technicians Can you help me understand where the problems are and what I should repair or replace? The steering wheel vibrates all the time and always veers to the left. Bad Brake Caliper Symptoms: 7 Signs to Watch Out For A only Although, if you have a fluid level sensor in the master cylinder reservoir, you may see this light come on when the fluids are low. The other three answers wouldn't cause the same issues. If you get no assist, you need a new check valve. The four noises that car owners complain about most often: CV joint noise, water pump noise, belt noise, and heat shield noise. This valve basically allows the rear drums to apply first in the system. Frank A5Brake Part A Hydraulic system - Chegg Technician B states that the brakes can continue to operate like non-ABS brakes. b. Caliper piston seized Brake problems can be daunting if you don't know what's causing them. When I apply the brakes, especially downhill, I feel the brake pedal presses itself more than I do. Technician B says you can check for ABS or TCS blink codes by connecting two pins of the DLC (Data Link Connector). Frozen caliper piston Technician B says when this happens the brakes will operate like a normal non-ABS brake system. If the impact occurs in 0.06 s, determine the average impulsive force acting on the car. Technician A is wrong because recalibration is not required for these sensors. Any noises coming from your car may result in you ignoring the indicators. However, there are shims on the brake pads which can get caught in these grooves from built up debris that may be there. 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! The power booster uses engine vacuum to assist your leg when applying the brakes, and is nearly universal in modern cars. Consider a system consisting of both objects A and B. The sliding and moving parts of the brake system require lubrication to prevent them from binding. A only This can be due to oil, grease or fluid on a pad, a caliper that is stuck, brake line blockage, or wheel bearings that are loose. Technician A says the cause could be a leaking power brake booster diaphragm. 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. Replacing the front strut a. Spalling When you remove the master cylinder, you must take all these steps EXCEPT: Correct answer D-Draining the master cylinder isn't required. Hard Pedal: You may have a loss of power assist because the engine vacuum is low. a. Who is right? Question: The brakes on my new O4 Ford Explorer are dragging. Calculate the following quantities: The total initial kinetic energy of the system. B only Correct answer B-This is the standard process by many OEMS when a new rotor is installed. Brake pads are being replaced on a vehicle with four-wheel disc brakes. Question: Sometimes when I apply the brakes, the pedal of my SUV goes very low before stopping completely. Technician A states that the parking brake is not fully released. Disc Brake System Flashcards | Quizlet Brakes Dragging | The Causes of Brake Drag Explained The other three answers can lead to a low brake pedal. A common symptom of this type of braking issue is a burning smell from the amount of heat the hung up brake generates. What can cause this? A only b. b. They will need to be resurfaced. Tech B says that banjo fittings are commonly used to connect brake hoses to wheels brake units. a. Sometimes, though not very often, the brakes won't work, and it sounds like it's grinding for one or two seconds. Fear of the unknown causes anxiety. Who is right? d. Neither A nor B, The front wheel bearings are being adjusted. Low Brake Fluid:Your Chevymay develop a leak in the system that will result in the fluid level going down. This article takes a closer look at three common culprits. Technician A believes it's a defective proportioning valve issue. What can cause brake drag, rear wheel lock up, or front wheel lockup upon breaking? a. The brakes on your car are probably the most important system, and due to the difficult job they do and how often they are used, they are also one of the most likely to wear and need service. Light trucks and vans were mandated to be equipped with center high mount stop lamps in: A regenerative braking system uses_____to slow the vehicle during braking. Who is correct? A short power assist brake booster push rod will lead to which of these? Answer: It could be a sticking caliper piston, slide pins, or the pads could be corroded in the caliper preventing them from moving freely. Lubricate the pads where the brake shoes ride on the backing plate of drum brakes. You can pump the brakes before application to help offset this problem, but you need to get it fixed. Who is correct? This delay causes the spongy feel. Brake hydraulics are a sealed system, so there should not be air in the lines, but if after service you have a sponge pedal that is the most likely cause. 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. B. Correct answer B-If the amber light is on, it indicates that there is an ABS fault. The hose will look OK on the outside, but the inner liner will cause a restriction on the inside. b. with the engine running Check out the system to make sure that you do not have a caliper leak or an oil leak. D. 400400400. Question: I have a 99 Honda Civic EX. Find out what these noises mean and what might fix them. 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. Brake Problems Caused By Fluid Contamination Correct answer C-A short push rod length will have to travel farther for contact and result in excessive pedal travel. Correct answer C-Both techs are correct. What is the most likely reason? Questions are welcome. Use the relative acceleration method to graphically determine the linear velocity and linear acceleration of the piston. The ABS is what kicks the brake pedal back, so most likely it has something to do with the ABS system. c. Both A and B a. To reduce this, the mating surfaces need to be cleaned and lubricated. Pulsation results from something loose in the system or by an unparallel rotor. C. Dragging brakes Brake drag is caused by the brake pads or shoes not releasing completely when the brake pedal is released. Who is right? 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. I recommend having all the brake lines, calipers, and the master cylinder checked for leaks. 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. What is the cause? Troubleshooting: Common Brake Issues and Causes 1. Answer: It sounds like you may have an ABS sensor not reading properly or maybe a damaged ABS sensor wire? The vehicle pulls to the side under heavy braking 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. Technician A says the yaw rate and deceleration sensor should be recalibrated. In Fig. A. Correct answer A-You must adjust the star adjuster until there's a slight drag on the drum. The other major way brakes act up is when they fail to disengage completely in one way or another. A. Correct answer C-Both technicians are correct. Technician B believes it's caused by movement of the brake pad while breaking. B. Manage Settings Low or uneven tire pressure can cause a pull. c. Both A and B Correct answer A-The defective check valve causes a loss in vacuum when the engine is off. It will lead to increased tire wear. The first thing to check with any brake issue is the fluid level and condition in the master cylinder reservoir. Symptoms of a Bad or Failing Brake Hose | YourMechanic Advice Correct answer C-The weak hydraulic brake hose causes a spongy pedal. If you do either of these processes, and your brake pads are more than half worn, its worth it to just replace the pads at the same time for the peace of mind it will give you; pads wear out frequently (they are a consumable item) and you might as well deal with them while in the neighborhood. Why is this? b. Brake systems contain all of these components EXCEPT: Correct answer B-Copper tubing should never be used within the brake system. Overview: How To Use OBD-II Scanner to Check Engine Light Codes - What type of scanners are there. Mechanical fading is when the drum gets too hot and expands away from the linings. ASE A4 Practice Test (Updated 2023) | Chapter 38 Test.docx - 5 / 5 It's also possible to check the blink codes with the DLC. Regardless, I recommend having a thorough brake inspection by an experienced mechanic. The other choices do not affect this concern. 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. If your brakes squeak and you want to know why, maybe I can help! The suspension additionally steering service area involves the following components: Steering system, Suspension system, Wheel Alignment and Wheel and Tires Service Log. A routine inspection would include all of the following EXCEPT. Can I drive my car? The building pressure in the system results in brake drag and possible brake lockup. 1. DOT 5 Tech A says that quick take-up master cylinders use two additional pistons to move brake fluid faster. Brake Pull: Uneven braking means that you have one front brake on your Chevy that is not operating properly. if your brake pedal is soft; first check the fluid level to determine if you have a leak in the braking system. d. A faulty power booster. Which is the correct way to service these brakes? 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? d. Seized caliper piston. d. Neither A nor B. Technician A says the vacuum supply test involves inspecting the vacuum supply hose for kinks. Correct answer B-Insufficient clearance between the pads and caliper slider causes the slider not to move and only applies one brake pad causing only that pad to wear. 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. Beginner's Guide: What is ABS (and How Does It Work)? 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. 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. Write the correct spelling for Middle layer of skin. Which of the following can cause brake system dragging? Technician B b. Brakes that Drag: Dragging brakes cause the brakes to wear out faster, and they can cause steering pull and tire wear. A. Basic Body Work: Fixing a Deep Scratch in Your Car's Paint. The brakes on quick take up systems use the exact bleeding procedure as systems without the valve. The way to prevent these issues is to avoid driving in deep puddles, or areas where salt is used on the roads, but if that isn't an option, be sure to clean the wheels and underside of the car often in winter. A only It can also be the result in worn disc brake pads. My Car Sounds Like Something Is Dragging, But Nothing On a bearing that has been shock loaded, the race (cup) of the bearing can be dented. In the brake booster there is a washer that is suppose to keep the pushrod centered as it goes into the mastercylinder. Answer: Is your abs light on? Flashcards - ASE BRAKES - FreezingBlue Second, it can act like a check valve. Within disc brake calipers, the pistons are sealed by a: Which of the following take(s) up the clearance as disc brake pads wear? Question: My car won't start unless I press really hard on the brakes.
which of the following can cause brake system dragging
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