1. What type of energy is converted into heat energy in disc brakes?
a) Potential energy
b) Kinetic energy ✅
c) Chemical energy
d) Electrical energy
2. What is the function of vent-holes around the center of car wheels?
a) To make the wheels lighter
b) To allow air to cool the brakes ✅
c) To increase the braking power
d) To prevent rust
3. What is the role of the brake caliper?
a) To create hydraulic pressure
b) To push the piston in the master cylinder
c) To hold the brake pads and press them against the disc ✅
d) To rotate the disc
4. Why is brake fluid used in the braking system?
a) It is compressible and absorbs pressure
b) It helps in cooling the brakes
c) It transmits pressure as it is incompressible ✅
d) It reduces friction between the brake pads and disc
5. What material was traditionally used to make heat-resistant brake pads?
a) Rubber
b) Plastic
c) Asbestos ✅
d) Copper
6. What happens when the driver presses the brake pedal?
a) The brake pads immediately stop moving
b) A piston in the master cylinder creates pressure in the brake fluid ✅
c) The wheels lock automatically
d) The caliper stops working
7. What part of the braking system ensures that both brake pads press against the
disc?
a) Master cylinder
b) Wheel cylinder
c) Caliper ✅
d) Suspension system
8. How does the brake system amplify force?
a) By using an electric motor
b) By using a larger master cylinder than the wheel cylinder
c) By using a smaller master cylinder than the wheel cylinder ✅
d) By increasing the number of brake pads
9. What type of force is primarily responsible for slowing the vehicle down in a disc
brake system?
a) Magnetic force
b) Frictional force ✅
c) Gravitational force
d) Centripetal force
10. Why do brake pads need to be covered with a high-friction material?
a) To increase the rotation of the wheels
b) To help them wear out quickly
c) To create the necessary resistance for braking ✅
d) To reduce noise
True/False Questions:
11. The brake pads press against a rotating disc to generate friction.
✅ True
12. Car wheels do not require vent-holes for cooling.
❌ False (They need vent-holes to help cool the brakes.)
13. The master cylinder has a larger diameter than the wheel cylinder.
❌ False (The master cylinder has a smaller diameter to amplify force.)
14. A small force on the brake pedal creates a large force on the brake pads.
✅ True
15. The caliper system presses both the inner and outer surfaces of the disc.
✅ True
16. The brake system works by compressing the brake fluid to stop the car.
❌ False (Brake fluid is incompressible; it transmits pressure.)
17. The brake pads are directly mounted on the wheels.
❌ False (They are mounted in the caliper, which presses them against the disc.)
18. Disc brakes work by converting kinetic energy into sound energy.
❌ False (They convert kinetic energy into heat energy.)
19. The brake fluid is compressible and helps in reducing braking force.
❌ False (Brake fluid is incompressible and helps transmit force efficiently.)
20. Disc brakes are only used in motorcycles, not in cars.
❌ False (Disc brakes are used in both motorcycles and cars.)
Language study Verbs with up and down
1. As the car slows down, kinetic energy is converted to
heat.
2. An installation technician connects up cables and
switchgear.
3. A plastic pellet in a washing machine door heats up
into position and pushes the lock .
4. Car wheels are ventilated to cool down the brake discs.
5. Transformers are used on construction sites to step
down the mains voltage to avoid accidents with hand
tools.
6. Students in David's maths class were split up into three
groups.
7. One of Lucy's friends came up with the name Swingex-
L.
8. Students should keep up with subjects like maths and
physic
