AT100 Unit 3 Test

According to Pascal’s law, the original pressure placed on a confined liquid is _____ throughout the liquid.

• transferred with increased pressure

• transferred with decreased pressure

• transferred undiminished

• transferred with an increase or decrease, depending on the shape of the container

All of the following are characteristics of high-quality brake fluid, except:

• must not swell or deteriorate the brake system’s plastic and rubber parts.

• can safely be mixed with any other type of DOT-approved brake fluid.

• maintains even viscosity throughout a wide temperature variation.

• acts as a lubricant for pistons, seals, and cups to reduce internal wear and friction.

To compensate for the transfer of weight to the front wheels due to inertia when a vehicle is stopped, the vehicle’s brake system is designed with a(n) _____

• A. braking ratio

• B. additional brake pad on each front wheel

• C. emergency brake

• D. larger rear brake shoe assembly

In a dual brake system, the dual master cylinder _____

• locks up one wheel on each axle when braking

• applies pressure to separate front and rear brake hydraulic systems

• works the transmission clutch also

• has two master cylinders, with one positioned on top of the other

Which of the following valves controls brake hydraulic pressure to a vehicle’s rear wheels?

• Proportioning valve.

• Master cylinder check valve.

• Pressure differential switch.

• Metering valve.

The (a)   valve closes off pressure to the front disc brakes until the hydraulic system pressure can overcome rear brake shoe retracting spring pressure.

• proportioning
• variable pressure

• disc brake metering

• master cylinder check

Which of the following valves warns the driver that one side of a split hydraulic system has failed?

• Proportioning valve.

• Master cylinder check valve.

• Pressure differential switch.

• Metering valve.

Brake lines must be made of (a)   .

• double-walled steel

• thin-walled brass

• thin-walled copper

• bendable plastic

9. Metal brake lines and (a)   are connected together at certain points on a vehicle and are securely held with brackets or clips.

• steering system components

• flexible, rubber coolant hoses

• parking brake linkage

• flexible, rubber brake hoses

All of the following are parts of a wheel cylinder, except:

• two rubber cups.

• caliper pins.

• cast iron housing.

• two cylinder pistons.