Engine >> THE METRIC SYSTEM

Engine >> THE METRIC SYSTEM

The Metric System


EXAMPLES OF
QUANTITY APPLICATIONS METRIC UNIT SYMBOL

Length Dimensions meter m
Tire rolling
circumference
Turning circle/
radius
Braking distance

Greater than 999
meter kilometer km
Dimensions millimeter mm
Depth of surface
finish micrometer um

Area Glass & Fabrics square cm cm?
Brake & Clutch
linings
Radiator area etc.

Small areas square mm mm?

Volume Car Luggage
Capacity cubic meter m?
Engine Capacity liter l
Vehicle fluid
capacity cubic cm cm?

Volume Flow Gas & Liquid liter per second
l/s

Time Interval Measurement of second s
elapsed time minute min
hour h
day d

Velocity General use meter per second m/s
Road speed kilometer per hour km/h

Acceleration & General use meter per second
Deceleration squared m/s?



EXAMPLES OF
QUANTITY APPLICATIONS METRIC UNIT SYMBOL

Frequency Electronics hertz Hz
kilohertz kHz
megahertz mHz

Rotational General Use revolution per min. rpm
Speed revolution per sec. rps

Mass Vehicle mass megagram t
Legal load rating
General use kilogram kg
Small masses gram g
milligram mg

Density General use kilogram per
meter
kg/m?
gram per cubic
centimeter
g/cm?
kilogram per liter
kg/l

Force Pedal effort newton N
Clutch spring-force
Handbrake lever
effort etc.

Moment of Force Torque newton meter N-m
(Torque)

Power, Heat General use watt W
Flow Rate Bulbs kilowatt kW

Celsius Temperature General use degree Celsius °C

Thermodynamic General use kelvin k
Temperature

Electric Current General use ampere A
milliampere mA
microampere µA

Potential Difference General use kilovolt
kV
(Electromotive Force) volt V
millivolt mV
microvolt µV

Electric Resistance General use megohm M(insert
ohm sign)
kilohm k(insert
ohm sign)
ohm (insert
ohm sign)




EXAMPLES OF
QUANTITY APPLICATIONS METRIC UNIT SYMBOL

Electric Capac. General use farad F
microfarad µF
picofarad pF

Fuel Consumption Vehicle performance liter per 100
kilometer l/100 km

Oil Consumption Vehicle performance liter per 1000
kilometer l/1000km

Stiffness Linear stiffness kilonewton meter
kN/m

Tire Revolutions Tire Data revolution per
kilometer rev/km

Pressure Tire kilopascal kPa
Coolant
Lubricating oil
Fuel pump delivery
Engine compression
Manifold
Brake line (hydraulic)
Car heating &
ventilation
Barometric pressure

Luminous Intensity Bulbs candela cd

Accumulator Battery ampere hour A-h
Storage Rating


U.S.A./METRIC COMPARISON

QUANTITY USA METRIC SYMBOL

Length Inch-Foot-Mile Meter m
Weight (mass) Ounce-Pound Kilogram Kg
Area Square inch/Foot Square Meter m?
Volume-Dry Cubic inch/Foot Cubic Meter m?
-Liquid Ounce-Pint-Quart-Gallon Liter l
Velocity Feet Per Second MeP/Sec m/s
Road Speed Miles Per Hour Km Per Hour km/h
Force Pound-Force Newton N
Torque Foot-Pounds Newton meter N-m
Power Horsepower Kilowatt kW
Pressure Pounds Per Square Inch Kilopascal kPa
Temperature Degrees Fahrenheit Degrees Kelvin K
and Celsius °C


The AERA Technical Committee


January 1979 - SB 55

##END##

---

Looking for replacement engines? Visit our online Rebuilt Engines Store. Need to fix your engine? Access here the comprehensive online repair guide for your engine. Click Here to find a used engine.