Question 1

The following statements about parking brakes are all true EXCEPT:

Accepted Answer

Drum parking brakes on a four-wheel disc brake system usually do not use hydraulics to apply the brakes. They typically use cables or levers to apply the parking brake.

Question 2

If the brake pedal does not return to the released position or is  sticking or binding, what is the most likely cause ?

Accepted Answer

A dry or corroded cable can cause the brake pedal to not return to the released position or stick or bind. Rear brake adjustment or excessive cable slack may cause other issues, but not this specific problem.

Question 3

A screw and nut assembly is used to:

Accepted Answer

A screw and nut assembly is typically used in rear disc parking brakes to apply the necessary force to engage the brake pads against the disc.

Question 4

Technician A says the parking brake shown should be adjusted with the parking brake applied. Technician B says each wheel cable must be adjusted separately. Who is correct?

Accepted Answer

The answer of Technician A says the parking brake shown...

Question 5

Technician A says an auxiliary drum parking brake has a separate drum brake assembly on the inside of the rear disc brake hub and rotor. Technician B says auxiliary drum parking brakes are often used with rear standard drum brakes. Who is correct?

Accepted Answer

An auxiliary drum parking brake has a separate drum brake assembly on the inside of the rear disc brake hub and rotor. This means that Technician A is correct. However, Technician B is incorrect because auxiliary drum parking brakes are not often used with rear standard drum brakes.

Question 6

Technician A says most parking brake systems use a cable to connect the parking brake lever or pedal to the braking assemblies. Technician B says the cable assemblies are nonadjustable and must be replaced when the brake no longer works. Who is correct?

Accepted Answer

Technician A is correct because most parking brake systems indeed use a cable to connect the parking brake lever or pedal to the braking assemblies. Technician B is incorrect because while some cable assemblies may be nonadjustable, many parking brake systems do have adjustable cables to maintain proper tension and function, and they do not always need to be replaced when issues arise.

Question 7

Parking brake systems:

Accepted Answer

Parking brake systems primarily use mechanical linkages or cables to apply the brakes, not kinetic energy, static energy, or hydraulics acting on pistons. These systems are designed to hold a vehicle stationary, not to stop it while it is moving, which differentiates their operation from the regular braking system.

Question 8

All of the following statements about some electric parking brakes are true EXCEPT:

Accepted Answer

Electric parking brakes do not apply when the vehicle is placed in drive. They are designed to apply the parking brake when the vehicle is shifted into park or when a button is pressed.

Question 9

Technician A says the tool in the following figure is being used to connect the parking brake cable into the backing plate. Technician B says the tool is being used to disconnect the parking brake cable from the backing plate. Who is correct? ​

Accepted Answer

Technician B is correct. The tool in the figure is being used to disconnect the parking brake cable from the backing plate.

Question 10

All of the following statements about rear drum parking brakes are true EXCEPT:

Accepted Answer

In rear drum parking brake systems, the lever actuated by the brake cable directly pushes the brake shoes against the drum, not by forcing the wheel cylinder pistons out. The wheel cylinders are part of the hydraulic brake system and are not directly actuated by the parking brake mechanism.

Question 11

What type of mechanism keeps the parking brakes levers in the applied position?

Accepted Answer

A ratchet and pawl mechanism is commonly used in parking brakes to keep the levers in the applied position. The ratchet allows the lever to move in one direction (forward) but not in the opposite direction (backwards), and the pawl engages with the ratchet to prevent the lever from moving backwards once it has been set.

Question 12

Technician A says to adjust the service brakes before adjusting the parking brake. Technician B says to clean the threads of the adjusting nut before adjusting the parking brake. Who is correct?

Accepted Answer

Both technicians are correct. It is recommended to adjust the service brakes first before adjusting the parking brake. Additionally, cleaning the threads of the adjusting nut before adjusting the parking brake can help ensure proper adjustment and prevent the nut from becoming seized in place.

Question 13

Technician A says the parking brake is part of the hydraulic braking system. Technician B says the parking brake is usually operated through a cable-and-lever system. Who is correct?

Accepted Answer

The parking brake is usually operated through a cable-and-lever system. Therefore, only Technician B is correct. Technician A is incorrect because the parking brake is a separate mechanical system from the hydraulic braking system.

Question 14

Technician A says the test depicted in the illustration is for a ground side brake warning lamp switch. Technician B says the test shown can be used to check continuity of the switch in both the ON and OFF positions. Who is correct? ​

Accepted Answer

The answer of Technician A says the test depicted in...

Question 15

Technician A says integral disc parking brakes use the normal disc calipers as parking brakes to hold the vehicle while it is parked. Technician B says auxiliary drum parking brakes are contained inside the rotor of some rear disc brakes. Who is correct?

Accepted Answer

Both technicians are correct. Integral disc parking brakes use the normal disc calipers as parking brakes, while some rear disc brake rotors contain auxiliary drum parking brakes.

Question 16

The following illustration shows a:

Accepted Answer

The answer of The following illustration shows a:

...

Question 17

Technician A says that to remove a parking brake control mechanism, the parking brake should be fully applied before raising the vehicle. Technician B says that to remove parking brake control components, relieve parking brake cable tension by backing off the adjusting nut from the brake cable equalizer. Who is correct?

Accepted Answer

Technician B is correct because relieving tension on the parking brake cable by backing off the adjusting nut is a necessary step for safely removing parking brake control components. Fully applying the parking brake, as Technician A suggests, would actually increase tension, making removal more difficult.

Question 18

Technician A says the caliper in the following figure has an integral parking brake. Technician B says the caliper in the following figure is used on the front axles. Who is correct? ​

Accepted Answer

The answer of Technician A says the caliper in the...

Question 19

Technician A says the parking brake should hold the vehicle on a 30 percent grade in both the forward and reverse directions. Technician B says the parking brake must be able to stop a vehicle moving 5 mph within 100 feet. Who is correct?

Accepted Answer

According to the National Highway Traffic Safety Administration (NHTSA), the parking brake should be able to hold the vehicle stationary on a 30 percent grade in both directions. There is no mention of the parking brake needing to stop a vehicle moving at 5 mph within 100 feet. Therefore, Technician A is correct and Technician B is incorrect.

Question 20

Technician A says parking brake cables may be coated with nylon or plastic for protection against corrosion. Technician B says most control cables and rear brakes are partially covered with a flexible metal conduit or housing. Who is correct?

Accepted Answer

Both technicians are correct. Parking brake cables may indeed be coated with nylon or plastic for protection against corrosion, and most control cables and rear brakes are partially covered with a flexible metal conduit or housing.

Quiz 9: Parking Brakes