TM 9-4520-260-13
GLOSSARY
SECTION I. ABBREVIATIONS
Btu/hr ....................................................................................................................................British thermal units per hour
............................................................................... ................................................................................Degree Celsius
C
DC ............................................................................... ................................................................................ Direct current
ECU ........................................................................ ........................................................................Electronic control unit
ETD ........................................................................ .......................................................................... Electronic time delay
.......................................................................................................................................................... Degree Fahrenheit
F
Hz ...................................................................................... ....................................................................................... Hertz
PMCS..................................................... .................................................... Preventive Maintenance Checks and Services
rpm ........................................................................ ....................................................................... Revolutions per minute
U/M ............................................................................ ...............................................................................Unit of Measure
VDC .......................................................................... ........................................................................... Volts direct current
SECTION II. DEFINITION OF UNUSUAL TERMS
A
ALIGN - To arrange in a line vertically and/or horizontally.
ALLOCATION - Assignment of duties or materiels according to a plan.
AMBIENT - Surrounding. An engine cooled to ambient temperature has the same temperature as the air around it.
ASSEMBLY - A combination of parts that may be taken apart without destruction, which has no application or use of its
own but is needed for the completeness of a more complex item with which it is combined, or to which it is attached.
C
CARBON MONOXIDE - A poisonous gas that is made while a fuel is burning, especially if there is not quite enough air.
The gas is colorless, odorless, and tasteless, but it can cause illness or death. See the warnings on the Warning
Page at front of manual.
COMBUSTION - A chemical change, especially oxidation, accompanied by the production of heat and light.
COMPONENT - A part or a combination of parts which together accomplish a function.
COMPRESSED AIR - Air that is under pressure. When the compressed air in a hose or pipe is allowed to escape (such
as when you use an air gun), the air moves very fast and is used to blow away dirt and chips for cleaning.
CONDENSATION - A liquid formed from a vapor. Moisture carried in warm air will condense when it reaches a cold
area, such as the surface of a fuel tank in subzero weather.
CORROSION - A gradual wearing away caused by chemical action. Metals exposed to salt water are likely to corrode.
Glossary-1