Pistons & Cylinders
The difference in measurement between the X and Y axis of the cylinder is called
Out of round
Name the three dimensions the dial caliper can measure
Inside, outside, and depth dimensions
One inch is equal to how many centimeters?
2.54cm
True or False: If the circlips for the transmission are not damaged they can be reused
False
Piston knock would indicate these two parts are worn out of spec
The cylinder and piston
This is the surface that cylinders tend to wear the most
The thrust surface
Seven turns of the thimble on a standard micrometer thimble equals
.175 inches
120 in/lbs is equal to how many ft/lbs
10 ft/lbs
True or False: Valve clearance should be inspected with the engine warmed up
False: valve clearance should always be inspected with the engine at ambient temperature
Valve clearance that is too tight too measure could indicate that what is happening to the valve
The valve is sinking into the head
Why are pistons manufactured out of round?
Thermal expansion (the crown and piston pin boss expand the most)
The 0-25mm and 0-1 inch micrometers should never be stored in the fully closed position because this can happen
Rust and Corrosion can build up between the spindle and anvil
8 5/8 inches written as a decimal
8.625 inches
True or False: When installing flat type circlips the rounded edge of the clip should always face the force
True
True or False: If combustion chamber volume was decreased, cylinder volume would be unchanged and compression ratio would increase
True
Why should piston ring end gaps never be aligned
Loss of compression, uneven cylinder heating, and oil control
The small dial on a dial indicator represents what
The number of dial revolutions
On a motorcycle what would you measure using a fish scale (spring scale)?
Steering bearing tension
Name 3 of the 5 ways to increase measured HP
There are only five ways to increase HP: 1. More displacement 2. More RPM 3. Fill cylinders better (Turbo, scavenging, intake and exhaust tuning), 4. Improve combustion efficiency (compression ratio, combustion chamber geometry) 5. reduce friction
True or False: In most two stroke engines the same oil lubricates the crank shaft and the transmission
False the crankshaft is lubricated from the oil in the premix
The formula for calculating cylinder volume
Bore x Bore x Stroke x .7854 x number of cylinders?
Name the seven parts of micrometer
Sleeve, thimble, spindle, anvil, frame, lock,clutch
1cc (cubic centimeter) of water is equal to how many grams?
1 gram
What are the two types of engines?
Internal Combustion - burns fuel inside an engine (motorcycle engine)
External Combustion - burns fuel outside the engine (steam engine)
With a tire size of 190/60 ZR 17? 190 represents
Tire width in mm