OIT EXAM PREP GRADED A+ 2025
activated carbon - ANSWER-Particles or granules that have a high capacity to
selectively remove certain trace and soluble materials from water
adsorption - ANSWER-the gathering of a gas, liquid or dissolved substance on the
surface or interface zone of another material
aesthetics - ANSWER-aspects of drinking water quality that are perceivable by the
senses
air gap - ANSWER-an open vertical drop, or vertical empty space that separates a
drinking water supply; prevents the contamination of drinking water by back siphonage
or backflow
alternating current - ANSWER-an electric current that reverses its direction at regular
intervals
amperage - ANSWER-the strength of an electric current measured in amperes
ampere - ANSWER-the current produced by an electromotive force of one volt acting
through a resistance of one ohm
annular space - ANSWER-a ring-shaped space located between two circular objects
such as two pipes or the space between the casing and the well wall
anode - ANSWER-the positive pole or electrode of an electrolytic system
aquifer - ANSWER-a natural underground layer of porous water-bearing materials
backflow - ANSWER-a reverse flow condition
backsiphonage - ANSWER-a form of backflow caused by a negative or below
atmospheric pressure within a water system
cavitation - ANSWER-the formation and collapse of a gas pocket or bubble on the blade
of an impeller or the gate of a valve which drives water into the valve with a terrific force
that can cause pitting on the impeller or gate surface; accompanied by loud pounding
noises
chloramination - ANSWER-the application of ammonia to chlorinated water to form
chloramines for the purpose of secondary disinfection
coliform - ANSWER-when present, this is an indication that the water may contain
pathogens
activated carbon - ANSWER-Particles or granules that have a high capacity to
selectively remove certain trace and soluble materials from water
adsorption - ANSWER-the gathering of a gas, liquid or dissolved substance on the
surface or interface zone of another material
aesthetics - ANSWER-aspects of drinking water quality that are perceivable by the
senses
air gap - ANSWER-an open vertical drop, or vertical empty space that separates a
drinking water supply; prevents the contamination of drinking water by back siphonage
or backflow
alternating current - ANSWER-an electric current that reverses its direction at regular
intervals
amperage - ANSWER-the strength of an electric current measured in amperes
ampere - ANSWER-the current produced by an electromotive force of one volt acting
through a resistance of one ohm
annular space - ANSWER-a ring-shaped space located between two circular objects
such as two pipes or the space between the casing and the well wall
anode - ANSWER-the positive pole or electrode of an electrolytic system
aquifer - ANSWER-a natural underground layer of porous water-bearing materials
backflow - ANSWER-a reverse flow condition
backsiphonage - ANSWER-a form of backflow caused by a negative or below
atmospheric pressure within a water system
cavitation - ANSWER-the formation and collapse of a gas pocket or bubble on the blade
of an impeller or the gate of a valve which drives water into the valve with a terrific force
that can cause pitting on the impeller or gate surface; accompanied by loud pounding
noises
chloramination - ANSWER-the application of ammonia to chlorinated water to form
chloramines for the purpose of secondary disinfection
coliform - ANSWER-when present, this is an indication that the water may contain
pathogens
