Understanding Power Boosters in Vehicle Braking Systems

What does a power booster use to amplify the driver's pedal effort?

• Hydraulic fluid

• Electricity

• Gear mechanism

• Vacuum

What is the primary function of the power booster in a vehicle's braking system?

• To cool down the brake fluid

• To multiply the driver's pedal effort

• To signal the brakes to engage

• To reduce the vehicle's speed

Why can't diesel engines use manifold vacuum for the power booster?

• Diesel engines do not produce sufficient vacuum

• Because they operate at higher temperatures

• Due to the lack of an intake manifold

• Because of higher emissions

Which vehicles are fitted with an engine-driven vacuum pump for the power booster?

• Petrol engine vehicles

• Diesel engine vehicles

• Hybrid vehicles

• Electric vehicles

What role does the control valve play in the operation of the power booster?

• It regulates the vacuum level within the chambers

• It filters the air entering the system

• It admits air at atmospheric pressure to the rear of the unit

• It activates the master cylinder push rod

What component separates the chambers within the power booster unit?

• A vacuum seal

• A plastic divider

• A metal plate

• A flexible rubber diaphragm

How is hydraulic pressure in the brake system initially generated?

• By the master cylinder push rod moving forward

• Through manual force applied by the driver

• By electrical signals sent to the brakes

• Using a hydraulic pump

What happens when the vacuum source to the power booster is interrupted?

• More effort is needed to apply the brakes

• Braking power is increased

• The vehicle switches to regenerative braking

• The brakes lock up automatically

What maintains the vacuum in the booster when the engine is off?

• The intake manifold

• An external vacuum reservoir

• A battery-powered pump

• The non-return valve

After the engine is switched off, how many power-boosted applications does the remaining vacuum in the booster provide?

• None

• Unlimited until the vacuum dissipates

• At least one

• Two