Exam
Name___________________________________
| MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. | ||
| 1) | What part causes the disc brake caliper piston to retract when the brakes are released? | 1) ______ |
| A) Return (retracting) spring | |
| B) The caliper bushings | |
| C) The square cut O-ring | |
| D) The rotating rotor (disc) that pushes the piston back |
| 2) | Two technicians are discussing the reason that the brake fluid level in the master cylinder drops. Technician A says that it may be normal due to the wear of the disc brake pads. Technician B says that a low brake fluid level may indicate a hydraulic leak somewhere in the system. Which technician is correct? | 2) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 3) | Two technicians are discussing a floating-type disc brake caliper. Technician A says that if the caliper slides are corroded, one pad may wear more than the other pad on the same wheel brake. Technician B says that if a caliper slide is corroded, reduced braking may occur. Which technician is correct? | 3) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 4) | Technician A says that disc brakes are self adjusting and the brake pedal height should not become lower as the disc brake pads wear. Technician B says that as the disc brake pads wear, the level of brake fluid in the master cylinder reservoir drops. Which technician is correct? | 4) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 5) | Which type of disc brake caliper may require alignment for proper operation? | 5) ______ |
| A) Sliding | |
| B) Single piston | |
| C) Floating | |
| D) Fixed |
| 6) | A quick take-up master cylinder is required when what type of caliper design is used on a vehicle? | 6) ______ |
| A) Two-piston | |
| B) Low-drag | |
| C) Fixed | |
| D) Sliding |
| 7) | Technician A says that all vehicles equipped with rear disc brakes use a parking brake that is integrated in the caliper. Technician B says that all vehicles equipped with rear disc brakes use a small drum brake inside the rear rotor for a parking brake. Which technician is correct? | 7) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 8) | The brake pad edge code letters "FF" mean ________. | 8) ______ |
| A) Quality factor | |
| B) Coefficient of friction rating | |
| C) Noise level rating | |
| D) Brand name |
| 9) | Semimetallic brake pads are made by a process called ________. | 9) ______ |
| A) Grating | |
| B) Melting | |
| C) Sintering | |
| D) Composition |
| 10) | The major ingredient in most brake lining is ________. | 10) ______ |
| A) Phenolic resin | |
| B) Carbon | |
| C) Ceramic powders | |
| D) Graphite |
| 11) | Technician A says that brake fade due to heat or water is not possible on disc brakes. Technician B says that heat and water fade can occur on disc brakes, but is not as likely compared to drum brakes. Which technician is correct? | 11) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 12) | Technician A says that one disadvantage of disc brakes is noise. Technician B says that disc brakes are easier to equip with a parking brake mechanism than drum brakes. Which technician is correct? | 12) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 13) | Technician A says that all slides and caliper bushings should be lubricated for proper operation. Technician B says that lubricant should not be used on disc brake parts because it can trap and hold dirt. Which technician is correct? | 13) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 14) | Two technicians are discussing the construction of a single piston caliper. Technician A says that the fluid is retained by a piston seal fitted in a groove machined in the piston. Technician B says that the piston is held in the caliper by a lock ring. Which technician is correct? | 14) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 15) | When the pressure in a caliper is released, the piston is moved back in the cylinder by ________. | 15) ______ |
| A) Spring pressure | |
| B) The action of the piston seal | |
| C) The opening of the vent port | |
| D) The leverage of the caliper arms |
| 16) | Disc brakes have many advantages, some of which are listed below. Which of the following statements does NOT apply to disc brakes? | 16) ______ |
| A) They dissipate heat faster. | |
| B) They are self-energizing. | |
| C) They resist fading. | |
| D) They are self-cleaning. |
| 17) | The outboard shoe of a single piston caliper is pushed against the rotor by the ________. | 17) ______ |
| A) Piston | |
| B) Push rod | |
| C) Caliper body | |
| D) Caliper mounting |
| 18) | Single-piston type disc brakes are adjusted by ________. | 18) ______ |
| A) Star wheel adjusters | |
| B) Piston movement through the seal | |
| C) Torquing the guide pins | |
| D) Self-adjusting mechanisms |
| 19) | Which of the following is NOT a part of a brake caliper assembly? | 19) ______ |
| A) Pistons | |
| B) Anti-rattle spring | |
| C) Dust boot | |
| D) Cup seal |
| 20) | Single piston calipers are ________. | 20) ______ |
| A) Leak prone | |
| B) Seldom used on today's vehicles | |
| C) Easy to service | |
| D) Expensive to manufacture |
| 21) | Four-piston calipers are ________. | 21) ______ |
| A) Not as strong and powerful as single-piston calipers | |
| B) Easier to service than single-piston calipers | |
| C) Used on high performance vehicles | |
| D) More commonly used than single-piston calipers |
| 22) | Rotors are vented ________. | 22) ______ |
| A) To reduce material cost | |
| B) To aid cooling | |
| C) To increase strength | |
| D) For manufacturing ease |
| 23) | The sealing surface for fixed caliper piston seals is the ________. | 23) ______ |
| A) Caliper piston surface | |
| B) Caliper housing | |
| C) Caliper slides | |
| D) Caliper cylinder bore |
| 24) | When the brakes are released, the caliper pistons are retracted by ________. | 24) ______ |
| A) Springs | |
| B) Reverse hydraulic action | |
| C) Levers | |
| D) Piston seals |
| 25) | Disc brakes ________. | 25) ______ |
| A) Typically do not stop as well as drum brakes | |
| B) Always work quietly | |
| C) Make excellent parking brakes | |
| D) Have self-adjusting ability |
| 26) | Anti-rattle spring clips ________. | 26) ______ |
| A) Damp vibrations | |
| B) Are used as an option for disc brake systems | |
| C) Allow the pads to move around | |
| D) Help quiet drum brake noise |
| 27) | Disc brakes do not suffer from pull because ________. | 27) ______ |
| A) They have no self-energizing action | |
| B) They have self-cleaning ability | |
| C) Both A and B | |
| D) Neither A nor B |
| 28) | Mechanical fade is not a problem with disc brakes because ________. | 28) ______ |
| A) Disc brake pads have a lower friction coefficient | |
| B) Disc brake use power boosters | |
| C) Disc brakes have a relatively small swept area | |
| D) The brake rotor expands toward the brake linings as it heats up |
| 29) | Which friction lining compound is MOST likely to cause excessive rotor wear? | 29) ______ |
| A) Ceramic | |
| B) Semi-metallic | |
| C) Non asbestos organic | |
| D) None of these |
| 30) | Which is NOT a part of a disc brake? | 30) ______ |
| A) Rotor | |
| B) Spindle | |
| C) Splash shield | |
| D) Caliper |
| 31) | Technician A says some brake pads have tapered edges to prevent vibration. Technician B says pad wear indicators are required by law on all new vehicles. Which technician is correct? | 31) ______ |
| A) Technician A | |
| B) Technician B | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 32) | Technician A says the caliper mounts to the steering knuckle. Technician B says the caliper mounts to the anchor plate. Which technician is correct? | 32) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 33) | Which is true of a fixed caliper? | 33) ______ |
| A) Compact in size | |
| B) Simple construction | |
| C) Inexpensive to manufacture | |
| D) Flexes less than other designs |
| 34) | Which is true of a floating or sliding caliper? | 34) ______ |
| A) Wears out the inboard pad first | |
| B) Design contributes to a hard brake pedal | |
| C) Only used with antilock systems | |
| D) Flexible mounting systems slow the transfer of heat |
| 35) | Which is NOT true of rear disc brakes? | 35) ______ |
| A) Relatively poor parking brake performance | |
| B) Costly and complex | |
| C) Require a more complex hydraulic system | |
| D) May use a one-piece rotor with parking brake drum |
| 36) |
What is the purpose of the electrode in this illustration?
| 36) ______ |
| A) To indicate a worn out pad | |
| B) To heat the pad in cold weather | |
| C) To sense pad temperature | |
| D) To sense wheel speed |
| TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. | ||
| 37) | The more total piston area a brake caliper has, the more application force it can generate. | 37) ______ |
| 38) | Low-drag calipers maintain a closer running clearance between the rotor and brake pads than other types of calipers. | 38) ______ |
| 39) | Disc brakes have superior cooling ability. | 39) ______ |
| 40) | Disc brake design incorporates servo action. | 40) ______ |
| 41) | Brake linings have slots or holes to help prevent gas fade. | 41) ______ |
| 42) | The fixed caliper design is best for heavy-duty use. | 42) ______ |
| 43) | One function of the splash shield is to add extra cooling the brake. | 43) ______ |
| 44) | A fixed brake caliper must be centered over the rotor. | 44) ______ |
| 45) | A floating or sliding caliper must move when the brakes are reapplied. | 45) ______ |
| 46) | Sliding caliper ways must be kept free of grease at all times. | 46) ______ |