CWEA GRADE 4 TEST PART 2 EXAM PREP QUESTIONS WITH
CORRECT ANSWERS/NEWEST UPDATE
Terms in this set (339)
A substance which releases
hydrogen ions when dissolved in
water. Most acids will dissolve the
Acid:
common metals and will react with a
base to
form a neutral salt and water. An acid
is the opposite of an alkali, has a pH
rating lower than 7.0,
will turn litmus paper red, and has a sour taste.
The quantitative capacity of water or a
water solution to neutralize an alkali or base. It is
Acidity: usually measured by titration with a
standard solution of sodium
hydroxide, and is expressed in
ppm or mg/L of its calcium carbonate equivalent.
The difference between the readings
of an instrument and true value of
Accuracy:
what is being measured, expressed
as a percent of full
instrument scale.
, A clear vertical space through the free
atmosphere, between the lowest
opening of any pipe or faucet
conveying water or waste to a tank
plumbing fixture receptor or other
device, and the flood level rim of the
receptacle. An air gap is used
Air Gap: to prevent cross connection between a water
treatment device and a possible source of
wastewater,
thereby preventing a reverse flow
of water from the sewer into the
water supply system. Without an
air gap, such reverse flow could
occur due to an increase in the
pressure in the sewer system
or the creation of a negative
pressure in the water supply line.
Local plumbing codes usually
require the air gap to be twice the
diameter of the inlet, with a
minimum width of 1.5 inches.
Electrical current
that alternates direction in cycles
Alternating current (AC Power):
called hertz. American Wire Gage
(AWG): The U.S. standard for
wire size.
The quantitative capacity of water to
neutralize an acid; that is, the measure of how
much acid can be added to a liquid
without causing a significant change
in pH. Alkalinity is not the
same as pH because water does not have to
be strongly basic (high pH) to have a high alkalinity.
Alkalinity:
In the water industry, alkalinity is
expressed in mg/L of equivalent
calcium carbonate. There are three
kinds of alkalinity: carbonate,
bicarbonate, and hydroxide
, alkalinity. Total alkalinity is the sum
of all three kinds of alkalinity.
Different tests are
used to determine the quantity of the
different kinds of alkalinities
present in water.
A device that measures the
value of a variable and operates to
Automatic Controller:
correct or limit deviation from a
selected reference. It includes means
for both measurement and control.
Any combination of
Automatic Control System: automatic controllers connected in
closed loops with one or more
processes.
The employment of devices, which
Automation: automatically control one or more
functions in an industrial process.
A transformer used to step
voltage up or down. The primary
Autotransformer:
and secondary windings share
common turns, and it provides no
isolation.
A power source dedicated to
Auxiliary Source: providing emergency power to a
critical load when commercial power
is interrupted.
CORRECT ANSWERS/NEWEST UPDATE
Terms in this set (339)
A substance which releases
hydrogen ions when dissolved in
water. Most acids will dissolve the
Acid:
common metals and will react with a
base to
form a neutral salt and water. An acid
is the opposite of an alkali, has a pH
rating lower than 7.0,
will turn litmus paper red, and has a sour taste.
The quantitative capacity of water or a
water solution to neutralize an alkali or base. It is
Acidity: usually measured by titration with a
standard solution of sodium
hydroxide, and is expressed in
ppm or mg/L of its calcium carbonate equivalent.
The difference between the readings
of an instrument and true value of
Accuracy:
what is being measured, expressed
as a percent of full
instrument scale.
, A clear vertical space through the free
atmosphere, between the lowest
opening of any pipe or faucet
conveying water or waste to a tank
plumbing fixture receptor or other
device, and the flood level rim of the
receptacle. An air gap is used
Air Gap: to prevent cross connection between a water
treatment device and a possible source of
wastewater,
thereby preventing a reverse flow
of water from the sewer into the
water supply system. Without an
air gap, such reverse flow could
occur due to an increase in the
pressure in the sewer system
or the creation of a negative
pressure in the water supply line.
Local plumbing codes usually
require the air gap to be twice the
diameter of the inlet, with a
minimum width of 1.5 inches.
Electrical current
that alternates direction in cycles
Alternating current (AC Power):
called hertz. American Wire Gage
(AWG): The U.S. standard for
wire size.
The quantitative capacity of water to
neutralize an acid; that is, the measure of how
much acid can be added to a liquid
without causing a significant change
in pH. Alkalinity is not the
same as pH because water does not have to
be strongly basic (high pH) to have a high alkalinity.
Alkalinity:
In the water industry, alkalinity is
expressed in mg/L of equivalent
calcium carbonate. There are three
kinds of alkalinity: carbonate,
bicarbonate, and hydroxide
, alkalinity. Total alkalinity is the sum
of all three kinds of alkalinity.
Different tests are
used to determine the quantity of the
different kinds of alkalinities
present in water.
A device that measures the
value of a variable and operates to
Automatic Controller:
correct or limit deviation from a
selected reference. It includes means
for both measurement and control.
Any combination of
Automatic Control System: automatic controllers connected in
closed loops with one or more
processes.
The employment of devices, which
Automation: automatically control one or more
functions in an industrial process.
A transformer used to step
voltage up or down. The primary
Autotransformer:
and secondary windings share
common turns, and it provides no
isolation.
A power source dedicated to
Auxiliary Source: providing emergency power to a
critical load when commercial power
is interrupted.
