CDX Chapter 43 Exam

Technician A says that all vehicles must be fitted with a service brake and parking brake. Technician B says that only trucks must be fitted with a service brake and parking brake. Who is correct? - ANSWER-Technician A The principle that allows your car to stop is: - ANSWER-Friction The effectiveness of friction brakes depends on the braking components' - ANSWER-Ability to dissipate heat quickly into the atmosphere Tech A says that kinetic energy is created during braking to stop the vehicle. Tech B says that kinetic energy is converted to heat energy during braking. Who is correct? - ANSWER-Tech B On passenger-type tow vehicle, _________ brakes are often used - ANSWER-Electric Which of these is a simple mechanical system that uses leverage to force a friction block against one or more wheels? Drum, band, scrub, or disc? - ANSWER-Scrub Brake By using hydraulic cylinders of ________, the hydraulic forces can be increased or decreased. - ANSWER-Different sizes Situations such as heavy loads or long downhill grades where the brakes are used heavily can lead to overheating of the lining, drums, or brake fluid, resulting in a loss of braking called_______. - ANSWER-Brake fade In a horse-drawn buggy, the friction between the braking system and the wheel surface transformed the energy of the moving buggy into what kind of energy? - ANSWER-Heat energy ______ do just what their name suggests; they hold the brake shoes against the backing plate. - ANSWER-Hold-down springs Tech A states that a brake-by-wire system applies individual brake units at each wheel. Tech B states that during a panic stop, a brake-by-wire system prepares the brakes to be fully applied when the driver steps on the brake pedal. Who is correct? - ANSWER-Both A and B Tech A states that giving greater control of the braking system to the computer increases driving safety. Tech B states that a brake pedal emulator tells the computer how firmly the driver intends to brake. Who is correct? - ANSWER-Both A and B