The other choices do not affect this concern. Technician B says air trapped in the hydraulic system could be the cause. 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. The other major way brakes act up is when they fail to disengage completely in one way or another. Glazing is more a problem with drum brake systems than disc systems because pads get more ventilation. Question: My car won't start unless I press really hard on the brakes. If nothing happens, check the vacuum connections, and if they are okay, you need a new booster and vacuum hose. B. Which of these can lead to brake pedal fade? Technician A All of the following can cause brake system dragging, EXCEPT: Which of the following frictional brake systems is used on vehicles today? Mechanical fade occurs when the brake drum gets so hot it expands away from the brake linings. Glazed shoes or pads cause brake fade resulting in a loss of friction and reduced braking performance. The rotor needs to be measured at the thinnest point with a micrometer or vernier caliper to determine whether it can be resurfaced or not. Vacuum Pressure Vacuum - or really lack of vacuum pressure - is the most common cause of a hard brake pedal, and therefore the first thing to look at when a hard pedal is present. Check out the system to make sure that you do not have a caliper leak or an oil leak. c. Both A and B c. Both A and B An intermittent noise when braking lightly, as in the video below, could also be related to an uneven surface on the rotors. 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. Who is right? a. Now I have loud grinding sounds coming from the front left tire. 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. Tips and precautions to use when replacing your brake pads, so you can get quality results on a Honda or any other vehicle. Be careful with brake fluid; it is very corrosive when it gets on paint. 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? Within disc brake calipers, the pistons are sealed by a: Which of the following take(s) up the clearance as disc brake pads wear? HubPages is a registered trademark of The Arena Platform, Inc. Other product and company names shown may be trademarks of their respective owners. The building pressure in the system results in brake drag and possible brake lockup. This can be repaired by resurfacing or shims. All of these would cause a low brake pedal, EXCEPT: The hose will look OK on the outside, but the inner liner will cause a restriction on the inside. A low brake pedal can also be due to a fluid leak or worn brake linings. This lubrication will help prevent a possible squeaky noise as the shoes move across the plate. d. Neither A nor B. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters. B only Hard Pedal: You may have a loss of power assist because the engine vacuum is low. Master Cylinder: An incorrect brake pedal adjustment can cause brake drag. The ABS light doesn't go off after the engine starts. Buying a new caliper may cost more but you will make up the cost with the time you save. You shouldn't waste your valuable time trying to rebuild it. if your brake pedal is soft; first check the fluid level to determine if you have a leak in the braking system. Question: My rear inner pads wear down faster than the outer ones. a. b. Question: My brakes squeak only when I back up. A vehicle with 4-wheel disc brakes has a brake squeal. A spongy brake pedal may be caused by: Question: What causes a brake pedal to depress all the way to the floor in a car? 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. a. The caliper piston needs to move back into its bore with no binding. 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. c. Both A and B There are only about nine evil mechanics in the world, they just move around a lot! The drum brake adjuster is located under an access cover in the back of the drum brake. There are different causes for brake drag. Even with proper maintenance, you may find yourself with an unexpected brake problem -- here are some of the most common examples. The three most common brake noises I encounter every day when talking to customers are a grinding sound, a thumping from the rear, and a squeak. The other three answers can lead to a low brake pedal. Brake Squeal:A vibration between the pads and the calipers or the pads and the rotors can cause them to squeal. a. A vehicle has a very erratic brake pulling concern while applying the brakes. This article takes a closer look at three common culprits. If there is plenty of fluid in evidence, check if it is hot; repeated hard use, towing, descending a steep hill, or a dragging calipercan boil the fluid. Object B has initial momentum pB,i=4,6,0kg.m/s.\vec{p}_{B, i}=\langle 4,6,0\rangle kg. d. A faulty power booster. 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. If the impact occurs in 0.06 s, determine the average impulsive force acting on the car. The same factors can cause cable operated parking brakes to jam up as well, requiring a replacement of the parking brake cable. The power booster uses engine vacuum to assist your leg when applying the brakes, and is nearly universal in modern cars. Recently it takes longer to stop and I really have to put a lot of pressure on the brake pedal to come to a complete stop. The mechanic is now telling me I need all of those parts replace again. This leads to excessive pedal travel. 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). Technician A says the quick take up valve must be depressed. Al+ClX2AlClX3\ce{Al + Cl2 -> AlCl3} Technician A is working on a vehicle that was brought in with excessive brake pedal travel. While these are the most common causes of brake issues on your Chevy, you should never allow your brakes to go bad. The pressure can continue to build and the hose might expand, but not release the pressure to the brake units. That's why the power assist begins to function properly after the engine runs. Answer: I don't think it has anything to do with the brake, try starting it without doing that and see what happens. How To Determine Cause of Brake Drag. a. 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. d. Neither A nor B. The PCV valve vents the crankcase of blow by gases and isn't part of the braking system. d. Air in the hydraulic system. 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. A only "Scratcher" and "sensor" are types of disc brake pad __________ indicators. Question: Does an emergency brake in a car not work after an accident? Question: My car has power brakes and used to stop on a dime. The air cleaner also can't cause a brake fluid leak. Fluid will not run from the master cylinder while you remove it. The caliper can also freeze up if the caliper slide pins have lost lubrication because they have not been maintained properly. The star adjuster should be adjusted one full turn to back the shoes away from the drum. a. ASE identifies suspension both . Correct answer D-Both technicians are wrong. Correct answer A-The engine must be off to deplete the vacuum reservoir to test the booster. Eventually, a sticking brake caliper will wear down the brake pads. Who is right? Technician A says to verify wheel speed sensor operation, compare all four wheel speed sensor outputs to vehicle speed on the data list. Question: I had problems with my brakes grinding and pulling to the right when braking. How to Replace Honda Brake Pads: Tips and Precautions. Always replace components with genuine GM parts to avoid premature failure of brake system components. A master cylinder may fail in two ways: internally or externally. D. Neither technician. c. Leakage past the master cylinder cups 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. 7. You can diagnose this by starting your Chevy in order to build vacuum, and then turning it off for four or five minutes. Another cause of a hard brake pedal can be a brake caliper that is stuck or seized. One of the first components to engage goes by the name of the push rod. It will also have a fault code related to the loss of boost. a. Correct answer B-Disc brake squeal is often caused by movement of the disc brake pad during braking. Who is right? Here are five of the most common brake problems in cars. Overview: How To Use OBD-II Scanner to Check Engine Light Codes - What type of scanners are there. A hydraulic system uses the incompressible nature of fluid to transfer force from your brake pedal all the way to your brake caliper, causing it to close around the rotor and slow the momentum of your wheel. B only Question: Only one wheel brakes on my 2000 Acura. What can cause brake drag, rear wheel lock up, or front wheel lockup upon breaking? a. The master cylinder, where it attaches to the brake pedal. 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. Which of the following would NOT cause a disc break to drag? This also reduces braking power. The plugged compensator port leads to dragging brakes instead. If you do, it could be a matter of minutes until you smash into something. 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. The anchor pin never has to take all of the braking force when the brakes are applied, so its strength does not matter. Frozen caliper piston A. Correct answer C-New brake rotors don't need to be refinished. A brake pad that is semi-metallic will be noisier than a non-asbestos or ceramic pad. There are four types of brake fade. To perform a thorough inspection of brake pads, you should do all of the following EXCEPT. This pedal adjustment is crucial, and if adjusted too tightly, the vent port of the master cylinder can become blocked. In the brake booster there is a washer that is suppose to keep the pushrod centered as it goes into the mastercylinder. B only This brake pulsation can be fixed very easily by having your rotors resurfaced (which is cheaper) or replaced (more expensive). The ABS (antilock brake system) and TRACTION OFF indicator lights remain ON with the engine running. 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. A drum or rotor that has deep scores in it will cause the brakes to grab. 4-wheel disc brakes on a vehicle are causing brake squeal. Which of the following can cause brake system dragging? Which of the following conditions can cause brake pedal fade? 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. The brakes of large trucks are different. The ABS warning light usually comes on when there is this type of problem. It's worth grabbing a flashlight and looking to see whether the master cylinder is leaking visibly. 1. The failing bearing allows the hub to move around, effectively pushing the brake pads back into the caliper as far as it can. 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. While starting the engine with the brakes applied, the pedal does not go down slightly. Replacing your tires will fix this, or you could try rotating your front tires to the rear of the vehicle. Technician A says the vacuum supply test involves inspecting the vacuum supply hose for kinks. a. VAV_\text{A}VA and I1I_1I1? . Who is correct? Answer: It could be a sticking caliper piston, slide pins, or the pads could be corroded in the caliper preventing them from moving freely. 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. After the collision, object A is observed to have final momentum pA,f=13,3,0kgm/s.\vec{p}_{A, f}=\langle 13,3,0\rangle \mathrm{kg} \cdot \mathrm{m} / \mathrm{s}.pA,f=13,3,0kgm/s. b. It's possible your ABS module is no good. 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. A) Warped rotors B) anti-lock braking system operation C) Both A and B D) None of the above Both A and B Which of the following can cause brake system dragging? Then there are minor issues such as brake squealing, brake shudder/pulsing, burning smells, leaking fluids, pulling to one side, etc. Pulsation results from something loose in the system or by an unparallel rotor. Any noises coming from your car may result in you ignoring the indicators. Question: I just had brakes and rotors done two months ago on my vehicle. The brakes on quick take up systems use the exact bleeding procedure as systems without the valve. 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. a. Brake rotors need to be refinished under all of these conditions EXCEPT: A car that pulls to one side can be annoying and also dangerous. Tech B states that this function can also be carried out by the driver in manual mode. Failure of lateral runout or thickness variation checks If this is what is going on, you need to identify and replace the faulty part. b. Thus, there are many ways to design a lens that has a particular focal length in air. Al+ClX2AlClX3. A pull when braking may also have nothing to do with brakes. A only Why are X-rays, gamma rays, and fast-moving electrically charged particles potentially harmful to our bodies? C. Both technicians B. loosening the bleeder screw on the accumulator with the ignition switch on c. Defective metering valve. Technician B says the brakes on this vehicle cannot be bled. 1. 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! Technician B When another fluid, other than brake fluid, is added to the brake system, the two fluids mix and a detrimental act begins to occur in the system. Technician B says the cause could be a stuck closed residual check valve in the hose from the intake manifold to the power brake booster. They need to be replaced at once. Answer A, zero brake pedal free travel, will cause a dragging brake condition, but not pulsation. Questions are welcome. Is this a caliper or could it be a blockage in the brake hose? I replaced master cylinder already. 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. 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 b. 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. pumping the brake pedal 10 times with the ignition switch on It will not be caused by lateral runout, which would cause brake chattering or pulsing. Erratic brake pulling occurs on a vehicle when the brakes are applied. Technician A is wrong because the parking brake only affects the RED Brake Light not the amber. c. Low brake fluid B only Brake failure is common if the fluid leaks out of the system. The technician believes there is most likely an issue with the hydraulic system. Every rotor has a "minimum spec" for thickness, usually stamped on the rotor near the hub where the lug nuts are. Excessive Push Rod Length The brake system in your car contains numerous components, each of which plays a distinct role in braking. a. d. Neither A nor B. A check valve that is faulty can also let vacuum bleed out. What is the cause? You could add shims, use a brake noise aerosol, or brake grease to the backs of the pads to dampen the noise. A. 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.
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