Question 1

Friction is the force that stops the vehicle from moving.

Accepted Answer

True

Question 2

On a drum brake system the friction between the ___________and the brake ______________ slows the rotation of the wheels causing the vehicle to slow down.

Accepted Answer

shoe, drum

Question 3

Technician A says the sliding caliper works in such a way that the inside piston pushing against the rotor causes the outer pad to be pulled to the rotor on the outside surface. Technician B says the splash shield is put in place for cosmetic reasons only. Who is correct?

Accepted Answer

B

Question 4

Blaise Pascal formulated the laws on the use of _____________________ .

Accepted Answer

The answer of Blaise Pascal formulated the laws on the...

Question 5

Technician A says hydraulic force is used to create the friction required to stop a vehicle. Technician B says asbestos is no longer usable due to the health hazard it creates. Who is correct?

Accepted Answer

Technician A is correct because hydraulic force is indeed used in braking systems to create the friction necessary to stop a vehicle. Technician B is also correct because asbestos, once commonly used in brake pads, has been largely phased out due to its serious health risks, including lung cancer and mesothelioma.

Question 6

Brake fluid captured during a bleeding operation can be re-used.

Accepted Answer

Brake fluid is hygroscopic, meaning it absorbs moisture from the air, which can degrade its performance and lead to potential brake system failure. Therefore, it's not safe to reuse brake fluid captured during bleeding as it may be contaminated or have diminished effectiveness.

Question 7

On a disc brake system as the driver applies the brakes, two pads clamp against the _________________ causing it to slow down.

Accepted Answer

The answer of On a disc brake system as the...

Question 8

After an accident on the front of the vehicle involving the braking system, a thorough damage inspection should be on all but which of the following?

Accepted Answer

The answer of After an accident on the front of...

Question 9

Safety glasses and gloves are minimum PPE required when working on brakes.

Accepted Answer

Safety glasses and gloves are minimum Personal Protective Equipment (PPE) required when working on brakes to prevent eye injuries and skin contact with brake dust and chemicals. Other PPE such as respirators or full-face shields may be required depending on the application and level of hazard.

Question 10

________________ the brake system is done to remove any air that might be anywhere in the system.

Accepted Answer

The answer of ________________ the brake system is done to...

Question 11

Which of the following is not a part of the braking system?

Accepted Answer

A thruster is not a part of the braking system. It is typically associated with propulsion or steering systems. The other choices, master cylinder, wheel cylinder, and brake pads are all essential parts of the braking system.

Question 12

Pascal formulated the laws of friction known as Pascal's Law.

Accepted Answer

Pascal did not formulate the laws of friction, he is known for his contributions in the field of mathematics, physics, and hydraulic engineering. The laws of friction were formulated by Leonardo da Vinci and Guillaume Amontons in the 17th century.

Question 13

Technician A says the lug nuts are attached to the brake drums. Technician B says a crack in a brake drum can be welded and machined smooth. Who is correct?

Accepted Answer

Both technicians are incorrect. Lug nuts are not attached to brake drums, but rather to the wheel hub. Additionally, a brake drum with a crack should not be welded and machined smooth as it may compromise the safety and integrity of the braking system. Brake drums should be replaced if they are cracked or damaged.

Question 14

Technician A says Einstein's law of motion states that the velocity of a body remains constant unless the body is acted upon by an external force. Technician B says hydraulics is the principle force used in a braking system. Who is correct?

Accepted Answer

Technician A is referring to Newton's first law of motion, often attributed to Einstein in error, but the statement itself is correct regarding motion. Technician B is correct because hydraulics is indeed the principle force used in most vehicle braking systems, utilizing fluid pressure to transfer force from the brake pedal to the brake pads or shoes.

Question 15

Brake fluid is a type of ___________________ oil used in braking systems.

Accepted Answer

The answer of Brake fluid is a type of ___________________...

Question 16

Technician A says the metering valve delays full application of the front disc brakes until the rear brake shoes are applied. Technician B says the power booster uses pressure generated by the engine. Who is correct?

Accepted Answer

Technician A is correct. The metering valve is responsible for delaying the full application of the front disc brakes until the rear brake shoes are applied, to prevent the front brakes from locking up. Technician B is incorrect, as the power booster does not use pressure generated by the engine. Instead, it uses vacuum pressure created by the engine to assist with pedal force.

Question 17

Technician A says the rotor is attached to the hub or axle and rotates at the same rate as the wheel. Technician B says two shoes actuated by a servo clamps against the rotor to stop the vehicle. Who is correct?

Accepted Answer

Technician A is correct. The rotor is indeed attached to the hub or axle and rotates at the same rate as the wheel. Technician B's description is incorrect as it refers to a drum brake system, not a rotor brake system. A rotor brake system uses brake calipers that clamp against the rotor to stop the vehicle.

Question 18

The materials used for disc pads and drum brake shoes are the same.

Accepted Answer

Disc pads and drum brake shoes use different materials. Disc pads are typically made of harder materials such as ceramic or metallic compounds, while drum brake shoes are usually made of softer materials such as organic compounds or molded asbestos.

Question 19

Technician A says a servo is used to actuate the stopping force on a drum braking system. Technician B says the secondary shoe does little of the braking on a drum brake system. Who is correct?

Accepted Answer

Technician A is correct. A servo is used to actuate the stopping force on a drum braking system. Technician B is incorrect. The secondary shoe is responsible for a significant portion of the braking on a drum brake system.

Question 20

Technician A says hydraulic force in an enclosed container will be the same throughout. Technician B says a great amount of heat is produced as friction is applied during braking. Who is correct?

Accepted Answer

Technician A is correct because Pascal's law states that pressure exerted on an enclosed fluid is transmitted equally in all directions throughout the fluid. Therefore, hydraulic force in an enclosed container will be the same throughout.

Technician B is also correct because heat is generated as a result of mechanical energy being converted to thermal energy through friction during braking. This can result in a significant temperature increase, which can negatively affect the braking system's performance.

Quiz 35: Brakes