Grade 4: CWEA Collection Systems Maintenance Exam (Latest 2025/ 2026 Update) Questions with Verified Answers | 100% Correct | Grade A.

Grade 4: CWEA Collection Systems
Maintenance Exam (Latest 2025/ 2026
Update) Questions with Verified
Answers | 100% Correct | Grade A.

Automatic Controller: i,- i,- A device that measures the
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value of a variable and operates to correct or limit
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deviation from a selected reference. It includes
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means for both measurement and control.
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Automatic Control System: i,- i,- i,- i,-Any combination of i,- i,-




automatic controllers connected in closed loops
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with one or more processes.
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Automation: i,- i,-The employment of devices, which
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automatically control one or more functions in an i,- i,- i,- i,- i,- i,- i,-




industrial process. i,-




Autotransformer: i,- i,-A transformer used to step
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voltage up or down. The primary and secondary
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,windings share common turns, and it provides i,- i,- i,- i,- i,- i,-




no isolation.
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Auxiliary Source: i,- i,- i,- A power source dedicated to providing
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emergency power to a critical load when i,- i,- i,- i,- i,- i,-




commercial power is interrupted. i,- i,- i,-




BTU: i,- i,-British Thermal Unit. The energy required to
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raise one pound of water one degree Fahrenheit.
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One pound of water at 32°F requires the transfer
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of 144 BTUs change from liquid into solid ice.
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Balanced Load: i,- i,- i,-An alternating current power system
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consisting of more than two current-carrying i,- i,- i,- i,- i,-




conductors, in which these conductors all carry i,- i,- i,- i,- i,- i,-




the same current.
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Backbone: i,- i,-The major multi-channel link in a network,
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from which smaller links branch.
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Battery i,- i,-A collection of cells, grouped together to
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,provide higher voltage and /or higher current than
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a single cell.
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Blackout: i,- i,- A total loss of commercial power.
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Bonding: i,- i,-Deliberate connection of two or more i,- i,- i,- i,- i,-




points to reduce any difference of potential (voltage).
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Branch Circuit: i,- i,- i,- A division of a load circuit, with
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current limited by a fuse or circuit breaker.
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Break-Before-Make: i,- i,- Operational sequence of a i,- i,- i,-




switch or relay where the existing connection is
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opened prior to making the new connection.
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Brownout: i,- i,-A low-voltage condition lasting longer
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than a few cycles. Brownouts differ from outages
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only in duration.
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Buck-Boost Transformer: i,- i,- A small, low-voltage
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transformer placed in series with the power line
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, to increase or reduce steady-state voltage.
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Busbar: i,- i,- A heavy, rigid conductor used for high
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voltage feeders. i,-




Acid: i,- i,-A substance which releases hydrogen ions
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when dissolved in water. Most acids will dissolve
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the common metals and will react with a base to
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form a neutral salt and water. An acid is the opposite
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of an alkali, has a pH rating lower than 7.0,
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will turn litmus paper red, and has a sour taste.
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Acidity: i,- i,- The quantitative capacity of water or a
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water solution to neutralize an alkali or base. It is
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usually measured by titration with a standard solution
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of sodium hydroxide, and is expressed in
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ppm or mg/L of its calcium carbonate equivalent.
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Accuracy: i,- i,- The difference between the readings
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of an instrument and true value of what is being
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measured, expressed as a percent of full i,- i,- i,- i,- i,- i,-