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Exam 1: Brake System Fundamentals

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Question 1

True/False

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Friction is the use of a lever and fulcrum to create mechanical advantage.

A) True
B) False

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Question 2

Multiple Choice

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Boat trailers do not use electric braking because water _____ the life expectation of electric brake components.

A) lengthens
B) shortens
C) does not affect
D) None of the above

E) C) and D)
F) All of the above

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B

Question 3

Multiple Choice

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Which of the following materials is used for brake lines?

Trailer brakes are being discussed. Technician A says that hydraulic surge brakes are typically used on RV units. Technician B says that electric trailer brakes are typically used on utility and RV units. Who is correct?

Technician A says lockup is a condition in which a wheel stops rotating and skids on the road surface. Technician B says that positive wheel spin happens with no traction and the wheel spins but does not move the vehicle. Who is correct?

A(n)___________ is the hydraulic cylinder mounted on the backing plate of a drum brake assembly.

Parking brakes are used to hold a vehicle stationary after it has been stopped by the service brakes.

Technician A says rings or bracelets may be worn in the shop if electrical repairs are not being performed. Technician B says no jewelry should ever be worn in the shop. Who is correct?

Regardless of the type of braking system, mechanical, hydraulic, or electronic, where does the final braking action occur?

Always wear ____________________ gloves when working with chemicals.

The use of leverage increases force and increases distance by the same factor.

Brake cleaning is being discussed. Technician A says the fumes from aerosol cleaners and open part washers are heavier than air and will settle to the lower part of the work area.   Technician B says solvent vapors are not harmful. Who is correct?

The typical mechanical components of a hydraulic brake system include all of the following   EXCEPT:

A technician should be trained in the proper disposal of hazardous waste.

A vehicle with complete brake failure may be driven slowly into the shop if the technician is prepared to apply the emergency brakes if necessary.

A brake pedal assembly has a 9-inch lever and the master cylinder pushrod is 1.5 inches from the fulcrum. If the driver applies 50 pounds of force to the pedal, how much force will be applied to the master cylinder?

Describe the construction and basic operation of the typical master cylinder.

Flexible brake hoses are needed to allow movement between the brake hydraulic components and the steering / suspension components.

What are the hazards related to working on or near components of the supplemental inflatable restraint system (SIRS)?

Asbestosis is a disease caused by inhaling ____________________.