Brakes

Hydraulics uses what as its non-compressible medium

• Air

• Water

• Oil

• Grass

Which statement is correct

• The braking system amplifies the pressure exerted by the drivers foot

• The braking system decreases the pressure exerted by the drivers foot

• The braking system equalises the pressure exerted by the drivers foot

• The drivers foot had no direct correlation to the pressure on the braking system

What is mechanical advantage

• a robot at a rugby match

• what a mechanic has over the DIY’er

• Decreased effort due to the introduction of mechanics

• A system filled with oil

Is there any mechanical advantage with this picture

• Yes

• No

• Not sure

What is the MA co-efficient of the above

• 2

• 4.9

• 6

• 3

This is the equation for

• Ratio co-efficient

• Rocket co-efficient

• Sliding co-efficient

• Friction co-efficient

What is friction

• Microscopic peaks and troughs on surfaces interacting with one another

• The ability to move two surfaces together with force

• The resistance between two or more objects in contact

• All the above

If the friction co-efficient is 0.9 is it

• increased force needed to move

• decreased force needed to move

• No moving relationship

• exerts the same force

If the pivot ratio of the foot pedal is 3:1 and the brake cylinder 2 times bigger than the pedal cylinder and 10N is applied to the pedal then the braking pressure is

• 120N

• 60N

• 10N

• 240N

Which of the following is not a brake drum component

• Shoes

• Drum

• Pads

• brake cylinder