Multiple-Choice Questions on Brakes

1. What is the primary function of a brake in a vehicle?

a) Increase speed b) Inhibit motion by absorbing energy c) Decrease fuel consumption
d) Enhance vehicle aesthetics
2. Which type of brake is usually operated by a foot pedal?
a) Parking brake b) Emergency brake c) Service brake d) Hand brake
3. What is the primary mechanism for operating automotive service brakes?
a) Electric pressure b) Hydraulic pressure c) Mechanical pressure d) Pneumatic pressure
4. What are the two types of wheel-brake mechanisms?
a) Drum and disc b) Roller and disc c) Drum and roller d) Disc and plate
5. What does the master cylinder do in a brake system?
a) Converts hydraulic force into mechanical force b) Converts mechanical force into hydraulic force
c) Increases vehicle speed d) Controls steering mechanisms
6. Which component multiplies the driver's pedal effort in a brake system?
a) Master cylinder b) Brake booster c) Proportioning valve d) Brake shoe
7. What is the function of a proportioning valve in a brake system?
a) Increase hydraulic pressure b) Reduce hydraulic pressure to rear wheel cylinders
c) Apply equal pressure to all wheels d) Enhance vehicle aesthetics
8. Which type of brake encloses the brake assembly within a metal drum?
a) Disc brake b) Drum brake c) Air brake d) Hydraulic brake
9. What material is commonly used for brake linings?
a) Asbestos b) Steel c) Fiber metallic materials d) Rubber
10. What component is responsible for converting hydraulic pressure into mechanical movement in a brake system?
a) Master cylinder b) Wheel cylinder c) Brake pedal d) Proportioning valve
11. What increases when the brake pedal is pushed down in a hydraulic brake system?
a) Electrical resistance b) Hydraulic pressure c) Mechanical resistance d) Pneumatic pressure
Answer: b) Hydraulic pressure
12. Which part of the brake operating mechanism contains the brake fluid?
a) Brake booster b) Proportioning valve c) Reservoir tank d) Brake shoe
13. What happens if the friction surface of the brake shoe wears excessively?
a) The brakes will drag b) The vehicle will accelerate c) The hydraulic pressure will increase
d) The brake fluid will evaporate
14. What produces the braking action that slows or stops the wheels in a vehicle?
a) Electrical resistance b) Hydraulic friction c) Pneumatic pressure
d) Friction between stationary shoes or pads and rotating drum or disc
15. Which part of the brake system pressurizes the hydraulic system when the driver depresses the brake pedal?
a) Brake booster b) Wheel cylinder c) Master cylinder d) Brake shoe
16. What is the primary material used to make brake drums?
a) Aluminum b) Gray cast iron c) Steel d) Plastic
17. What divides the booster body in a brake booster?
a) A piston b) A valve c) A diaphragm and booster piston d) A spring
18. What type of brakes are commonly found in medium and heavy-duty trucks?
a) Hydraulic brakes b) Air brakes c) Drum brakes d) Disc brakes
19. How is braking force generated in a hydraulic brake system?
a) By compressing air b) By generating electrical signals c) By applying mechanical pressure
d) By applying hydraulic pressure through a liquid
20. What role does the brake pedal play in the braking system?
a) Controls steering b) Generates hydraulic pressure c) Initiates the braking process
d) Applies force to the brake drum
21. What component of the brake system is fitted to the backing plate?
a) Brake drum b) Brake shoe c) Master cylinder d) Brake booster
Answer: b) Brake shoe
22. What is the purpose of the reservoir tank in a brake system?
a) Store brake fluid b) Store hydraulic pressure c) Store air pressure
d) Store brake shoes
23. What happens to the vehicle's center of gravity when braking occurs?
a) Shifts backward b) Shifts sideways c) Remains unchanged d) Shifts forward
24. What type of brake lining is used to withstand the heat produced during braking action?
a) Rubber lining b) Fiber metallic lining c) Plastic lining d) Asbestos lining
25. How is the brake fluid flow controlled to each wheel in a hydraulic brake system?
a) By electrical signals b) By pneumatic pressure c) By the proportioning valve
d) By the brake booster
26. What is the main material used to construct the brake shoe?
a) Aluminum b) Steel c) Rubber d) Plastic
27. What component pressurizes the hydraulic system in a brake booster?
a) Booster body b) Diaphragm c) Booster piston d) Control valve mechanism
28. What is the purpose of the backing plate in a drum brake system?
a) Increase vehicle speed b) Enhance vehicle aesthetics c) Attach brake assembly to steering knuckle
d) Apply brake fluid to brake shoes
29. What material is brake lining made from to resist heat and wear?
a) Aluminum b) Plastic c) Fiber metallic material d) Rubber
30. What is the typical hydraulic pressure range for brake systems in vehicles?
a) 500-700 psi b) 2000-3000 psi c) 1000-1500 psi d) 3500-4000 psi
31. What mechanism applies force to the brake shoes in a drum brake system?
a) Hydraulic piston b) Electrical motor c) Pneumatic actuator d) Mechanical lever
32. What is the maximum temperature range that friction heat can reach in a brake drum?
a) 100-200°C b) 500-800°C c) 200-300°C d) 2000-3000°C
33. What factor increases the friction between the tire and the road when braking?
a) Increase in vehicle speed b) Increase in vehicle load c) Decrease in vehicle speed
d) Decrease in vehicle load
34. What is the role of the spring inside the wheel cylinder?
a) Increase brake fluid pressure b) Apply pressure to brake shoes c) Prevent brake fluid leakage
d) Maintain piston position
35. What reduces the hydraulic pressure to rear wheel cylinders in a brake system?
a) Master cylinder b) Brake booster c) Proportioning valve d) Wheel cylinder
36. What is the main function of the brake lining in a brake shoe?
a) Generate hydraulic pressure b) Reduce vehicle speed c) Create friction with the brake drum
d) Enhance vehicle aesthetics
37. What causes the master cylinder to pressurize the hydraulic system?
a) Pushing the brake pedal b) Releasing the brake pedal c) Rotating the brake drum
d) Shifting the vehicle's center of gravity
38. What material is typically used for wheel cylinders to handle hydraulic pressure?
a) Aluminum b) Steel c) Plastic d) Rubber
39. What is the function of the reaction mechanism in a brake booster?
a) Increase brake fluid pressure b) Create friction with brake shoes
c) Maintain booster piston position d) Apply
40. What role does the brake booster play in the braking system?
a) Converts mechanical force into electrical force b) Multiplies the driver's pedal effort
c) Generates hydraulic pressure d) Reduces vehicle speed
41. Which part of the brake system holds the brake fluid?
a) Proportioning valve b) Brake booster c) Master cylinder reservoir d) Brake pedal
42. What component helps to ensure even braking force distribution in a vehicle?
a) Brake drum b) Brake booster c) Proportioning valve d) Brake shoe
43. What is the function of brake shoes in a drum brake system?
a) Generate hydraulic pressure b) Create friction with the brake drum
c) Control the steering mechanism d) Store brake fluid
44. How does the wheel cylinder contribute to the braking process?
a) Converts hydraulic pressure into mechanical movement b) Generates electrical signals
c) Increases vehicle speed d) Stores hydraulic fluid
45. What is the result of pressing the brake pedal in a hydraulic brake system?
a) Increase in vehicle speed b) Decrease in hydraulic pressure
c) Increase in hydraulic pressure d) Decrease in electrical resistance
46. What type of material is typically used to make brake linings resistant to heat?
a) Plastic b) Rubber c) Fiber metallic materials d) Aluminum
47. What happens when the master cylinder pressurizes the hydraulic system?
a) Vehicle speed increases b) Brake shoes or pads are forced against rotating drums or discs
c) Brake fluid evaporates d) Hydraulic pressure decreases
Answer: b) Brake shoes or pads are forced against rotating drums or discs
48. What is the main material used for constructing brake drums?
a) Aluminum b) Plastic c) Gray cast iron d) Steel
49. What is the purpose of the spring inside the wheel cylinder?
a) Increase brake fluid pressure b) Apply pressure to brake shoes
c) Maintain piston position d) Store brake fluid
50. What happens to the vehicle's center of gravity when the brakes are applied?
a) Shifts backward b) Shifts sideways c) Remains unchanged d) Shifts forward
Answer Key

1. b) Inhibit motion by absorbing energy

2. c) Service brake
3. b) Hydraulic pressure
4. a) Drum and disc
5. b) Converts mechanical force into hydraulic force
6. b) Brake booster
7. b) Reduce hydraulic pressure to rear wheel cylinders
8. b) Drum brake
9. c) Fiber metallic materials
10. b) Wheel cylinder
11. b) Hydraulic pressure
12. c) Reservoir tank
13. a) The brakes will drag
14. d) Friction between stationary shoes or pads and rotating drum or disc
15. c) Master cylinder
16. b) Gray cast iron
17. c) A diaphragm and booster piston
18. b) Air brakes
19. d) By applying hydraulic pressure through a liquid
20. c) Initiates the braking process
21. b) Brake shoe
22. a) Store brake fluid
23. d) Shifts forward
24. b) Fiber metallic lining
25. c) By the proportioning valve
26. b) Steel
27. d) Control valve mechanism
28. c) Attach brake assembly to steering knuckle
29. c) Fiber metallic material
30. b) 2000-3000 psi
31. a) Hydraulic piston
32. d) 2000-3000°C
33. b) Increase in vehicle load
34. d) Maintain piston position
35. c) Proportioning valve
36. c) Create friction with the brake drum
37. a) Pushing the brake pedal
38. b) Steel
39. c) Maintain piston position
40. b) Multiplies the driver's pedal effort
41. c) Master cylinder reservoir
42. c) Proportioning valve
43. b) Create friction with the brake drum
44. a) Converts hydraulic pressure into mechanical movement
45. c) Increase in hydraulic pressure
46. c) Fiber metallic materials
47. b) Brake shoes or pads are forced against rotating drums or discs
48. c) Gray cast iron
49. c) Maintain piston position
50. d) Shifts forward