
83
C
Chlorine Dioxide
Chilled Water: Water used as a cooling medium, particularly in air-condi-
tioning systems, which is at below ambient temperature.
Chiller: Refrigerating machine used to transfer heat between uids; com-
plete, indirect refrigerating system of compressor, condenser, and evaporator
with all operating and safety controls.
Chisel Bit: A device with a single bit running the width of the hole. Also
called a dove-tail bit.
CHK: Choke.
CHKS: Backow checks.
CHKS (Rig Up): Chicksans.
CHL: Cased-hole log.
Chloramines: Compounds of chlorine with organic and inorganic nitrogen.
Chloride Stress Cracking: Cracking of a metal under combined act ...