D. All of the above. The air brakes test covers the air brake system in detail, including appropriate air loss, brake lag, system components, and more. Brake fade and failure are usually due to incorrect use of the brakes that causes excess heat. a. Worn brake pads, air bubbles in the brake lines, low fluid level in the reservoir. 1. We have complied 100 questions you will find on the air brakes exam. 6. answer. answer choices heat water hydraulic All of the above Question 4 30 seconds Q. Oil, grease, dirt, dust, and debris in the braking system. Trouble Cause Remedy 1. This questions appears in the following tests: Connecticut Air . Excessive use of the service brakes: not relying enough on engine braking: Brakes being out of adjustment: All of the above: 7. Since brake fade occurs from overheating, it's usually temporary and . a. Following are some of the possible causes and remedies for brake failure: Sr. No. Once the vehicle is in the proper low gear, the following is the proper braking technique: Apply the brakes just hard enough to feel a definite slowdown. If you notice smoking or an acrid burning smell coming from one wheel, you might want to check on the brakes. Mechanical Fade . Technician A believes it's a defective proportioning valve issue. Rotor fade. - air in the system - excessively worn brake pads - use of the wrong fluid - a leaking diaphragm in the vacuum power booster Fade Dissipation of heat from the brake components is necessary to prevent brake: - chatter - fade - grab - shudder A only Which of the following can cause brakes to fade or fail? False 8. Damaged or faulty brake hoses. Which of the following can cause brakes to fail or fade? These effects on brake fade are discussed in the following section. A drum brake inspection is being attempted but the technician is having difficulty removing the brake drums. Get paid to get your CDL in our truck driving job! B. Anti-lock braking system operation. 2. An overheated radiator is the most common cause of a vehicle fire. Know Everything about Brakes in this Automobile Quiz. When your speed has been reduced to approximately 5 mph . The pressure can continue to build and the hose might expand, but not release the pressure to the brake units. Brake fade is a problem that can be described as the inability of the brakes to maintain their effectiveness. The air brakes test covers the air brake system in detail, including appropriate air loss, brake lag, system components, and more. Today's Question: cdl/brake-fade-is-a-result-of . Most hydraulic brake failures occur for one of two reasons. The brake pedal is soft and spongy. All of the following are possible causes except: (a) Incorrect parking brake adjustment (b) Excessive shoe-to-drum clearance (c) Wear ridge on the drum (d) Parking brake not fully released (0.5 mark) We have complied 100 questions you will find on the air brakes exam. Binding pedal linkage would lead to a hard pedal, which is also true for a dented brake line. There are a total of 25 multiple choice questions on the air brakes exam, and you must score 80% (20 out of 25) to pass the exam. To learn more about Roehl's paid CDL training, view our Get Your CDL page or apply now. A. Scratcher type B. First, gear down before you get to an incline or situation where you need to stop. Car. Brake fade in these cases will still, usually, have a firm pedal but the conversion of momentum into heat cannot effectively happen so the car does not slow up . C. Under-inflated or flat tires will NOT cause a vehicle fire. Technician A says that water-soaked brake shoes will cause brake fade. Who is correct? a . use engine braking. CDL Test Questions and Answers. Which of the following could cause an extremely hard brake pedal? Brake fluid fade occurs because your brake fluid (being hydrophilic) absorbs moisture. A brake surging feeling. At first the pedal will feel spongy as air bubbles start to form in the fluid and you'll need to push it down further to achieve the same braking power. Using brakes parts past when they should be changed. Water in the braking system. turn off the engine, release the parking brake and time the air pressure drop. . c. Clean with approved cleaner and reuse d. Repair leak and replace brake linings. Brakes kept in good condition will rarely fail, but you should know which . Going too slow. Brake fade caused by water can occur _____. a. push the parking brake control knob in. The second likely cause is that there has been a loss of hydraulic pressure in the braking system. 6.Which of the following conditions can cause brake pedal fade? To check that spring brakes come on automatically, the first thing to do is to: continue to step on and off the brake pedal until the air pressure falls to the manufacturer's specification. Related post: Keronite Tech: Aluminum With Ceramic Coatings Typically, the three most common problems related to brake pedal sink are caused by the master cylinder, a brake fluid leak, or ABS unit leak. Technician B says that friction brakes can fade due to overheating of the brake fluid. 17. There are 3 types of brake fade. Excessive brake disc rotor thickness variation will cause: A. place the parking brake control knob in Neutral. Relying solely on the brakes for long periods of time will cause the brakes to overheat, and this causes brake fade - a partial or complete . The driver meets resistance when pushing the brake pedal, but little to no deceleration happens. A brake is a mechanical device that inhibits motion by absorbing energy from a moving system. Brake Fluid Fade: Brake fluid fade can happen when water in the vehicle's brake fluid overheats from all the friction. When your speed has increased to . Correct answer: Weak hydraulic hose. This is due to sustained and repetitive application of the brakes which results into deterioration of both drum and disc brakes. The rear brake linings are soaked with axle grease but still have a lot of lining left on them. Damaged brake pads from overuse and overheating. Once the vehicle is in the proper low gear, the following is the proper braking technique: Apply the brakes just hard enough to feel a definite slowdown. Questions and Answers. All of the following can turn on the red brake warning light, EXCEPT: the parking . Tech B says that when the brake pedal is depressed, a push rod transfers the force through a brake booster to a hydraulic master cylinder. C. Both A and B D. None of the above 9. That overheated water boils into steam, which reduces the effectiveness of your brakes. Pump non-ABS brakes. Brake drum machined beyond its limit c. Leakage past the master cylinder cups d. Air in the hydraulic system B. These locations also put extreme demands on . Brakes are one of a number of mechanisms and forces in a car that slow it down. Use the retarder if you have one. D. Poor trailer ventilation can cause cargo to catch . Brake fade. Brake fade or braking system fade is the degradation or complete loss in stopping power of vehicle's braking system. It's a temporary loss of function in the braking system. The moisture-contaminated brake fluid in your brake line and brake hose network is likely to boil and produce air bubbles when exposed to the heat generated by heavy braking. This will cause the overworked brakes to become much hotter than they should be and may eventually lead to brake fade. Once has to ensure that their breaks are working before they hit the road. push the brake pedal three times. When you apply the brakes and heat is transferred to the brake fluid, eventually the fluid will boil if the brakes aren't allowed to cool. Tech B says that a disc brake operates by squeezing brake pads on both sides of a rotor or disc that is attached to the wheel. #4. both. To control your speed on a downgrade, you should: use controlled braking. Tech A says that disc brakes are used on the front of most vehicles built since the early 1970s and on the rear wheels of many vehicles. Too much heat on the brake drum can cause either it or the tire it is controlling to catch on fire. 2011 Honda FN2. 4. Mechanical Foundation System -Components (such as discs and pads or drums and shoes) that creates the friction required to stop the vehicle. Overheating, low air pressure or water in the air tanks. Brake fade is one of the leading cause of road crash here in the country especially with truck . We have complied 100 questions you will find on the air brakes exam. It's important to remember . Which of the following is a type of disc brake pad wear indicator? CDL Test Questions and Answers. Brake drum machined beyond its limitc. . The following factors can cause brakes to fade or fail: Not regularly checking brakes for signs of wear or damage. Take this quiz on breaks and breaking system and see how well you know about them as a whole. stop immediately. Friction Fade Friction fade is the most common type and can be called "pad fade." It is caused by the pad material starting to melt. Depending on the design, brake pads can stand temperatures up to 700F - 1,200F. Which of the following statements about causes of vehicle fires is true? Glazing is more a problem with drum brake systems than disc systems because pads get more ventilation. When driving through water puddles or during a severe rainstorm . Brake fade. The other three answers can lead to a low brake pedal. . Technician A says that water-soaked brake shoes will cause brake fade. The air brakes test covers the air brake system in detail, including appropriate air loss, brake lag, system components, and more. Going too slow. A. Under which conditions are front wheel brakes good? When the brake shoe friction material is worn to the point that the metal brake shoe backing contacts the drum, a scraping/ grinding noise will be heard each time the brakes are applied. Seized wheel cylinder piston b. a. If going downhill it's better to downshift as opposed to riding . they can become too hot. All of the following can turn on the red brake warning light, EXCEPT: the parking . Tags: Question 10. True B. There are a total of 25 multiple choice questions on the air brakes exam, and you must score 80% (20 out of 25) to pass the exam. Binding pedal linkage would lead to a hard pedal, which is also true for a dented brake line. If the low air pressure warning light comes on, you should: continue to drive normally. Loss of stopping power, or fade, can be caused by friction fade, mechanical fade, or fluid fade. It is used for slowing or stopping a moving vehicle, wheel, axle, or to prevent its motion, most often accomplished by means of friction. Technician B says a defective master cylinder can cause the brake pedal to slowly sink to the floor when depressed. The amount of friction between two moving faces in contact with each other is expressed as a ratio and is called: answer choices fraction the coefficient of friction the coefficient of heat. The Master Cylinder is a vital component found in modern vehicle braking systems, as it is the main pump that sends pressurized brake fluid through the brake lines, allowing the brake calipers to squeeze . We have complied 100 questions you will find on the air brakes exam. Use this free Air Brakes commercial drivers license practice test to prepare yourself to get your CLP (commercial learner's permit). 30 seconds. Overheating, low air pressure or water in the air tanks. 6. C. . Technician B says that friction brakes can fade due to overheating of the brake fluid. pull the parking brake control knob out. When the drum is overheated, it separates and expands away from the brake shoes. Carrying a properly charged and rated fire extinguisher will help to prevent a fire. The weak hydraulic brake hose causes a spongy pedal. pull the parking brake control knob out. Tech A says that when the brake pedal is depressed, a push rod creates the hydraulic pressure in the disc brake system. When the good brakes fade, the only brakes available to stop the truck will be the deficient ones.
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