M05 Chapter 6 Quiz AUTI 121

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Loss of hydraulic power from the hydro-boost means the driver loses all braking ability. Group of answer choices True False

False

Technician A says hydro-boost operation can be divided into three stages. Technician B says that moderate brake application causes the input pushrod to press on the reaction rod in the end of the power piston. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

B only

Technician A says a hydraulic brake booster is usually found on vehicles with diesel engines. Technician B says most passenger cars and light trucks use the hydro-boost system. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

A only

Technician A says to diagnose a brake system that does not release, loosen the connection between the master cylinder and the brake booster. Technician B says if the brakes do not release when the master cylinder is removed from the booster, the booster is defective. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

A only

Electrohydraulic brakes are being discussed. Technician A says an electrohydraulic brake system controls hydraulic braking action through the use of electrical solenoids. Technician B says the system shares information with ABS, TCS, and electronic suspension. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

Both A and B

Technician A says a hydraulic power booster unit is installed in the same place as a vacuum booster. Technician B says the function of the hydraulic power booster is to multiply the force of the driver's foot on the brake pedal. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

Both A and B

Technician A says a restricted vacuum feed hose may cause loss of assist after several quick brake applications. Technician B says brake fluid in the vacuum feed hose indicates a leaking master cylinder seal. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

Both A and B

Technician A says pedal free play is the first easy movement of the brake pedal before the braking action begins to engage. Technician B says pedal free play should only be about 1/16 to 3/16 on most cases. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

Both A and B

Technician A says the air and vacuum valves used on a tandem diaphragm must control vacuum and atmospheric pressure on two diaphragms at the same time. Technician B says when the brakes on a tandem diaphragm system are released, there is a vacuum on both sides of each diaphragm. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

Both A and B

Technician A says the rear or back of the booster is that part nearest the driver and abuts the bulkhead. Technician B says the front or forward part of the booster is where the master cylinder is installed. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

Both A and B

Technician A says vacuum for most power brake systems is supplied by the engine intake manifold. Technician B says many late-model cars that use intake manifold vacuum as the power source for the power brakes have a vacuum reservoir. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

Both A and B

Vacuum power brakes are being discussed. Technician A says vacuum on both sides of the diaphragm doubles the amount of force on the master cylinder pistons. Technician B says the return spring forces the diaphragm to the forward position when there is vacuum on both sides of the diaphragm. Who is correct? Group of answer choices A only B only Both A and B Neither A nor B

Neither A nor B

Intake manifold vacuum decreases and increases as the engine is accelerated and decelerated. Group of answer choices True False

True

Power brakes are simply conventional brakes with an added power booster. Group of answer choices True False

True


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