Which description represents the meaning of the Alphabet of Lines?
OA. conventions that require the arrangement of line styles in technical drawings in alphabetical order
B. conventions that require the depiction of lines in technical drawings as letters
C. conventions that govern line styles in technical drawings
D. conventions that govern alphabetic line styles in technical drawings

An air-conditioning system consists of a heating section and an evaporative cooler. air enters the heating section at 10°c and 70 percent relative humidity at a rate of 30m^3/min, and it leaves the evaporative cooler at 20°c and 60 percent relatively humidity. if the air conditioning system operates at a total pressure of 98 kpa, determine (a) the temperature and relative humidity of the air when it leaves the heating section, (b) the rate of heat transfer in the heating section, and (c) the rate of water added to air in the evaporative cooler