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Correct answer D-Both technicians are wrong. 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. 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. "Scratcher" and "sensor" are types of disc brake pad __________ indicators. Which of the following would NOT cause a disc break to drag? b. A. Technician A says excessive brake pedal freeplay could be the cause. a. Low Brake Fluid:Your Chevymay develop a leak in the system that will result in the fluid level going down. Within disc brake calipers, the pistons are sealed by a: Which of the following take(s) up the clearance as disc brake pads wear? The ABS (antilock brake system) amber light does not go off after the engine is started. You can pump the brakes before application to help offset this problem, but you need to get it fixed. To determine if your rear brakes are the problem, you need to test them in isolation. 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. Technician B believes that the brakes can't be bled. The caliper piston needs to move back into its bore with no binding. 1. They can also cause you to use more fuel. A only D. Neither technician. d. Repacking a front wheel bearing, Technician A says a defective wheel or axle bearing can make a growling or rumbling noise. c. Parking brake out of adjustment 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. A vehicle is equipped with a vacuum brake booster. If the master cylinder is leaking externally, you will see fluid dripping from the place where the rod goes into the cylinder. You can diagnose this by starting your Chevy in order to build vacuum, and then turning it off for four or five minutes. a. ABS Diagnostic Trouble Code set 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. 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. Then there are minor issues such as brake squealing, brake shudder/pulsing, burning smells, leaking fluids, pulling to one side, etc. Binding Pins B. Sticking piston C. Binding caliper D. Worn break pads . which of the following can cause brake system dragging d. A faulty power booster. a. Correct answer B-The greatest drawback of drum brakes is that they are susceptible to fade. C. The star adjuster should be adjusted until a slight drag on the wheel occurs. Loose wheel bearing If your brakes squeak and you want to know why, maybe I can help! a. Who is right? If you do, it could be a matter of minutes until you smash into something. Technician B says the test involves checking the level of vacuum supplied by the engine or vacuum pump. They need to be replaced at once. B only Replace the defective part. The other situations wouldn't be caused by the lack of free play. Rear Brake Drag or Lockup - Drum Brakes - Phoenix Systems It will not be caused by lateral runout, which would cause brake chattering or pulsing. The technician believes there is most likely an issue with the hydraulic system. They consist of the index of refraction of the lens and the radii of curvature for its two surfaces. b. Who is right? 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? You should clean or replace the adjusters to eliminate the problem. A slight gap should be present between the pushrod and the master cylinder. The drum brake adjuster is located under an access cover in the back of the drum brake. Brake drag often occurs when the fluid in your system overheats. Technician A believes that you must depress the quick take up valve. Is this possible? Answer: No, you should really look for a new mechanic, pads maybe if you drive a ton of miles in stop and go traffic or you're a mail carrier, lines are rarely replaced. After a master cylinders replaced and the brake system is bled what must happen? Answer: It is most likely either a blockage in the line or a worn brake master cylinder. The wheel cylinder is attached to the ________. The same factors can cause cable operated parking brakes to jam up as well, requiring a replacement of the parking brake cable. 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. Answer A, zero brake pedal free travel, will cause a dragging brake condition, but not pulsation. The system reverts to regular brake operation without ABS. 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-drum brakes measure the pad-to-caliper piston clearance. Brake hoses twist while replacing the caliper after a brake job resulting in brake drag at that unit. Brake systems contain all of these components EXCEPT: Correct answer B-Copper tubing should never be used within the brake system. What are possible causes? Is this a caliper or could it be a blockage in the brake hose? ASE identifies suspension both . Master Cylinder: An incorrect brake pedal adjustment can cause brake drag. A better idea of where the master cylinder is located in relation to the brake pedal. A only Al+ClX2AlClX3. Answer A is correct. a. Opening or loosening any part of the hydraulic system is dangerous because of the fluid pressure. d. Neither A nor B. In a brake system with disc front and drum rear, there is a valve in the system known as a metering valve or hold-off valve. 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. 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. Al+ClX2AlClX3\ce{Al + Cl2 -> AlCl3} If this is what is going on, you need to identify and replace the faulty part. Some vehicles have __________ openings in the backing plate to allow for manual adjustment of the brake shoes. Technician B says when this happens the brakes will operate like a normal non-ABS brake system. b. c. Both A and B Seized caliper piston Correct answer C-Both techs are correct. All the other answers are improper ways of adjusting drum brakes. A pull when braking may also have nothing to do with brakes. 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. Here are four common brake squeaks plus a bonus scraping noise; compare these situations to yours. The pictures below show the master cylinder under the brake pedal. B. b. Caliper piston seized The anchor pin never has to take all of the braking force when the brakes are applied, so its strength does not matter. This article is accurate and true to the best of the authors knowledge. A vehicle with 4-wheel disc brakes has a brake squeal. c. Seized caliper piston on the other side 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). Which of the following can cause brake pedal pulsation? Are they safe? While these are the most common causes of brake issues on your Chevy, you should never allow your brakes to go bad. 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. If you have rear disc brakes, this procedure may not work because some makes and models have a separate emergency brake, which is connected not to the rear rotor and caliper, but to a special drum inside the rear rotors with a separate braking system. ASE PRETEST QUIZLET Flashcards | Quizlet 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. When the fluid gets warm and expands, there is no where to go, so it starts applying the calipers, and the brakes drag. It will need replacement or resurfacing. B only Technician A says to check the TCS and ABS diagnostic trouble codes. 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. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as overextended self-adjusters. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as . Correct answer D-A restricted disc brake caliper hose won't cause pedal pulsation. I highly recommend having your car towed; this is a very dangerous situation, and the problem needs to be fixed before the car is driven. 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. c. Both A and B ASE T-4 Brakes Flashcards - Cram.com . b. Technician B says backing off the castle nut will cause the bearing to overheat. a. If the slide pins are your problem, they need to be cleaned and lubricated or replaced. ASE A5 Brakes Flashcards | Chegg.com If you determine that you have a leak, check the calipers, hoses, lines, master cylinder and wheel cylinders for the leak. Typically rusted rotors or drums only happen when a car has been sitting for a long period. Technician A is wrong because the parking brake only affects the RED Brake Light not the amber. c. VAV_\text{A}VA and ITI_\text{T}IT? Correct answer B-Disc brake squeal is caused by the brake pad moving while braking. a. You will find the booster between the master cylinder and the firewall in your engine compartment. 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? The brakes on quick take up systems use the same bleeding procedure as those without this valve. The component in the Figure is involved what procedure? 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. Excessive Push Rod Length The brake system in your car contains numerous components, each of which plays a distinct role in braking. 3 Basic Kinds of Valves in a Non-ABS System. Answer: There are a few options to look at here. Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Using the screwdriver, gently pry out the rubber grommet that protects this access cover. The first thing to check with any brake issue is the fluid level and condition in the master cylinder reservoir. What is the most likely reason? Personal Injury Attorney With Truck Accidents They following are three of them. 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. Chapter 43/44/45/46 Brakes Flashcards | Quizlet Who is right? A vehicle comes in with a complaint of excessive pedal travel before the brakes apply. c. Both A and B B. 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. We and our partners use cookies to Store and/or access information on a device. Which of the following could cause a pulsating brake pedal on a truck with hydraulic brakes? B only Brake drag is caused by the brake pads or shoes not releasing completely when the brake pedal is released. 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? Which of the following can cause brake system dragging? 4-wheel disc brakes on a vehicle are causing brake squeal. Technician A says the quick take up valve must be depressed. Scraping Brakes:Metal-to-metal sounds mean that the pads or shoes are worn out. Many times the cause of an accident will be due to a problem with the brakes. Answer: It sounds like you may have an ABS sensor not reading properly or maybe a damaged ABS sensor wire? 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. This lubrication will help prevent a possible squeaky noise as the shoes move across the plate. Replace the hydrobooster. 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. d. Metering valve. Technician A says the master cylinder pushrod adjustment is incorrect. The other choices do not affect this concern. Technician B says the brakes on this vehicle cannot be bled. Technician A The plugged compensator port leads to dragging brakes instead. This leads to excessive pedal travel. Calculate the following quantities: The total initial kinetic energy of the system.