The Owner of a Vehicle Complains the Car Is Hard

question 74

Multiple Choice

The owner of a vehicle complains the car is hard to stop. The technician doing the diagnosis starts by pumping the brake pedal several times with the engine off, and then starts the engine while holding firm pressure on the brake pedal. The pedal falls away slightly and less pressure is needed to maintain the pedal in any position. What does this test prove?

• A)The master cylinder is working.
• B)The vacuum booster is working.
• C)The front brakes require adjustment.
• D)There is air in the hydraulic system.

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Definitions:

Christopher Wren

A prominent 17th-century English architect, known for his role in reconstructing London after the Great Fire, including his design of St. Paul's Cathedral.

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An academic title for a person who teaches and conducts research in the field of astronomy, focusing on the study of celestial bodies and the universe.

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The capital city of the United Kingdom, known for its rich history, cultural diversity, and significant contributions to arts and sciences.

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A social class in the Netherlands that emerged in the 17th century, characterized by their significant role in commerce and urban life.