Brakes 2 recap

Brake fluid must meet SAE and DOT specifications for:

• Viscosity, Lubrication, Low freezing & Water tolerant

• Corrosive, High freeze point, High boiling & Lubrication

• Non- Corrosive, Low Boiling, Lubrication & Viscosity

• Water intolerant, Lubrication, Low boiling & Non-corrosive

DOT 4 Plus and DOT 5 brake fluid never need replacing as they are Hydrophobic.

• True

• False

Hygroscopic means:

• Easily absorbs moisture

• Easily repels moisture

• It is safe to put on paintwork

• Silicone based

Hydrophobic means:

• Easily scared of water

• It repels water

• It easily absorbs moisture

• Can be ingested

Which brake system is safest?

• Single circuit because less to go wrong

• Drum brakes because water cannot get in drums

• Dual circuit brakes as secondary circuit is backup.

• non servo assisted brakes

How are brakes divide on a diagonal split braking system?

• one circuit on front, one on rear wheels

• there are two pipes to each wheel

• One front brake and opposing rear brake.

• One front and one rear on same side of car

Brake servo principles state that the servo meets which condition?

• If servo fails brakes must still operate.

• It must allow the brake to be gradually applied

• The application must be in proportion to effort applied by driver

• All of these answers

On a compression engine vehicle how is the Vacuum applied?

• There is a valve on the inlet manifold.

• There is a valve on the exhaust manifold.

• CI engines use air brakes so not required.

• There is a vacuum pump.

When driver removes pressure from brake pedal the brakes are return by:

• Vacuum in the Hydraulic system

• The deformed seals and return springs

• Adjusters working on screw threads

• Anti-friction backing plates

The purpose of braking systems are:

• To slow the Vehicle, bring to a stop & remain stationary

• Hand Brake, Foot Brake & Service Brake

• Emergency, Hand & Parking Brakes

• Hygroscopically operated