Exam
Name___________________________________
| MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. | ||
| 1) | Two technicians are discussing drum brake shoes. Technician A says that forward and rear-facing shoes are the same and can be installed in either position on any drum brake system. Technician B says that the darker color linings should always be placed toward the front of the vehicle Which technician is correct? | 1) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 2) | Two technicians are discussing brake lining edge codes. Technician A says that the code can identify the manufacturer. Technician B says that all friction material from the same manufacturer will have the same edge codes. 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) | Technician A says that starwheel adjusters use different threads (left and right handed) for the left and right sides of the vehicle. Technician B says that a pawl controls the teeth of the starwheel adjuster. 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 drum brakes can fail to slow the vehicle if driven through deep water. Technician B says that when drum brakes get hot, the brake pedal will drop because the drum expands away from the shoes. 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) | Technician A says that self-adjusters used on most drum brakes work when the brakes are applied, then release while traveling in reverse. Technician B says the adjusters can over adjust if the brake drums are hot. Which technician is correct? | 5) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 6) | Drum brake shoes ________. | 6) ______ |
| A) Can have one shoe that is longer than the other on the same wheel brake | |
| B) Can have bonded linings | |
| C) Can have riveted linings | |
| D) All of the above are possible |
| 7) | Which lining does most of the braking on a dual-servo brake? | 7) ______ |
| A) Rear (rearward facing) | |
| B) Front (forward facing) | |
| C) Both contribute equally | |
| D) Depends on the speed of the vehicle |
| 8) | Which lining does most of the braking on a leading/trailing brake? | 8) ______ |
| A) Trailing (rearward facing) | |
| B) Leading (forward facing) | |
| C) Both contribute equally | |
| D) Depends on the speed of the vehicle |
| 9) | Two technicians are discussing drum brake self adjusters. Technician A says that a frozen starwheel adjuster can cause the brakes to lock up due to the adjusting lever being unable to move the adjuster causing the linkage to bind. Technician B says that some brakes self adjust when the brakes are applied rather than when released. Which technician is correct? | 9) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 10) | A typical drum brake backing-plate has how many shoe support pads (also called ledges)? | 10) ______ |
| A) 8 | |
| B) 3 | |
| C) 6 | |
| D) 4 |
| 11) | Drum brakes ________. | 11) ______ |
| A) Expand outward and stop the rotating drum that is attached to the wheels | |
| B) Are used mostly on the rear | |
| C) Can incorporate a parking brake | |
| D) All of the above |
| 12) | A typical drum brake uses how many hold-down springs? | 12) ______ |
| A) 2 | |
| B) 6 | |
| C) 4 | |
| D) 1 |
| 13) | The brakes on a dual-servo drum system are designated as ________. | 13) ______ |
| A) Primary and secondary | |
| B) Leading and trailing | |
| C) Two leading shoes | |
| D) None of the above |
| 14) | On dual-servo brakes fitted with self-adjusters, the star wheel is prevented from turning backward by the ________. | 14) ______ |
| A) Anchor pin | |
| B) Hold-down spring | |
| C) Adjuster lever | |
| D) Cable guide |
| 15) | On the dual-servo braking system, which shoe does most of the braking during forward movement of the vehicle? | 15) ______ |
| A) The primary shoe | |
| B) The secondary shoe | |
| C) Both A and B | |
| D) None of the above |
| 16) | On non-servo brakes, which shoe does most of the braking in during forward movement of the vehicle? | 16) ______ |
| A) The secondary shoe | |
| B) The primary shoe | |
| C) The leading shoe | |
| D) The trailing shoe |
| 17) | Cup expanders are used in some wheel cylinders to ________. | 17) ______ |
| A) Hold the lips of the cups against the cylinder walls | |
| B) Allow for wear on the cylinder walls | |
| C) Help the cups seal against high pressure | |
| D) Allow for the expansion of the fluid as the temperature increases |
| 18) | Technician A says that the labyrinth seal (drum groove) keeps water from ever getting onto a drum brake. Technician B says that only synthetic brake grease, lithium brake grease or anti-seize compound should be used as a brake lubricant. Which technician is correct? | 18) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 19) | The shoe support pads ________. | 19) ______ |
| A) Are lightly coated with silicone brake grease to minimize wear | |
| B) Prevent the brake shoes from rotating with the drum | |
| C) Prevent the wheel cylinder pistons from coming out of their bores | |
| D) Hold the shoes against the drum when the parking brake is applied |
| 20) | The greatest disadvantage of drum brakes is ________. | 20) ______ |
| A) Brake fade | |
| B) Poor parking brake performance | |
| C) Lack of power assist action | |
| D) Brake adjustment |
| 21) | Technician A says a disadvantage of drum brakes is that they require an adjusting mechanism to maintain the proper clearance between the shoe and drum. Technician B says a disadvantage of drum brakes is that they pull the car to one side during braking under certain conditions. Which technician is correct? | 21) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 22) | On a ________ brake, each brake shoe is applied individually. | 22) ______ |
| A) Single-servo | |
| B) Dual-servo | |
| C) Non-servo | |
| D) Triple-servo |
| 23) | ________ action uses drum rotation to force the brake shoe outward and wedge it tightly against the brake drum. | 23) ______ |
| A) Centrifugal | |
| B) Servo | |
| C) Centripetal | |
| D) Self-energizing |
| 24) | ________ action uses the stopping power of one shoe to help increase the application force of the other shoe. | 24) ______ |
| A) Centrifugal | |
| B) Self-energizing | |
| C) Servo | |
| D) Centripetal |
| 25) | Double leading non-servo brakes require ________ wheel cylinder(s). | 25) ______ |
| A) 1 | |
| B) 3 | |
| C) 2 | |
| D) 4 |
| 26) | The oldest method of attaching friction material to metal backings that is still in use is ________. | 26) ______ |
| A) Riveting | |
| B) Mold bonding | |
| C) Bonding | |
| D) None of these |
| 27) | In a servo brake, the secondary shoe provides approximately what percentage of the total stopping power? | 27) ______ |
| A) 75 | |
| B) 70 | |
| C) 55 | |
| D) 30 |
| 28) | Technician A says most automatic adjusters adjust the lining-to-drum clearance when the brakes are applied. Technician B says they adjust the clearance when the brakes release. Which technician is correct? | 28) ______ |
| A) Technician A only | |
| B) Technician B only | |
| C) Both Technicians A and B | |
| D) Neither Technician A nor B |
| 29) | The last two letters of a lining edge code reads EF. This means ________. | 29) ______ |
| A) The lining meets SAE standards for durability | |
| B) The lining manufacturing code | |
| C) The lining has a higher coefficient of friction when hot than when cold | |
| D) The lining has a higher coefficient of friction when cold than when hot |
| 30) | Automatic adjusters may be actuated by all of the following EXCEPT ________. | 30) ______ |
| A) Cable | |
| B) Parking brake | |
| C) Lever | |
| D) Air pressure |
| 31) |
What term describes component "A" in this illustration?
| 31) ______ |
| A) Bleeder screw | |
| B) Shoe adjuster | |
| C) Mounting pin | |
| D) Anchor pin |
| 32) |
What term describes component "B" in this illustration?
| 32) ______ |
| A) Shoe nibs | |
| B) Vibration dampers | |
| C) Shoe anchors | |
| D) Support pads |
| 33) |
Identify the parking brake strut in this illustration.
| 33) ______ |
| A) A | |
| B) B | |
| C) C | |
| D) D |
| 34) |
What type of drum brake system is shown below?
| 34) ______ |
| A) Double-leading | |
| B) Leading-trailing | |
| C) Double-trailing | |
| D) Dual-servo |
| 35) |
What type of drum brake system is shown below?
| 35) ______ |
| A) Double-trailing | |
| B) Leading-trailing | |
| C) Dual-servo | |
| D) Double-leading |
| TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. | ||
| 36) | Mechanical fade occurs when the friction material overheats. | 36) ______ |
| 37) | Holes may be provided in the backing plate for inspecting brake lining wear. | 37) ______ |
| 38) | Brake shoe holddowns are used to reduce brake noise. | 38) ______ |
| 39) | Trailing shoes generally wear at a faster rate than leading shoes. | 39) ______ |
| 40) | Brake drum rotation de-energizes the trailing shoe. | 40) ______ |
| 41) | A leading-trailing brake works well in reverse but not well forward. | 41) ______ |
| 42) | The dual-servo brake is more powerful than any non-servo design. | 42) ______ |
| 43) | The lining of the secondary shoe is usually larger than the primary shoe lining. | 43) ______ |
| 44) | Dual-servo adjusting links may be installed on either side of the vehicle. | 44) ______ |