Zusammenfassung der Ressource
Frage 1
Frage
One method of controlling chemical concentrations is to prepare chemical batches using a table of tank level vs__________
Antworten
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chemical addition
-
pump stroke
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steam flow
-
feedwater addition
Frage 2
Frage
Mechanical carryover can be prevented by careful boiler design and by operating the boiler within the design parameters for ______ level and firing rates
Antworten
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chemical
-
water
-
blowdown
-
impurities
Frage 3
Frage
The two most common designs of chemical feed pumps are the ________, plunger type and the electronic impulse-type
Antworten
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electric
-
electronic
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reciprocating
-
vibrating
Frage 4
Frage
A______ feed system, this involves feeding the chemicals to the boiler system at the most efficient injection points and at a steady and continuous rate.
Antworten
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closed bypass
-
shot
-
slug
-
continuous
Frage 5
Frage
_______ is particularly harmful as it forms a very hard deposit on turbine blades.
Antworten
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carryover
-
mist
-
silica
-
phosphate
Frage 6
Frage
The cause of carryover can be divided into two broad categories, namely mechanical and
Antworten
-
virtual
-
carryover
-
upset
-
chemical
Frage 7
Frage
_______ is particularly harmful as it forms a very hard deposit on turbine blades
Antworten
-
carryover
-
mist
-
sillica
-
phosphate
Frage 8
Frage
control of the continuous blowdown flow is _____ adjusted by the operator
Antworten
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manually
-
automatically
-
quickly
-
slowly
Frage 9
Frage
Shot feeding involves the injection of chemicals over a relatively _______ period of time
Antworten
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long
-
intermittent
-
short
-
measured
Frage 10
Frage
With the ______ feed system, its a common practice to mix one batch of chemicals per day.
Antworten
-
closed bypass
-
shot
-
slug
-
continuous
Frage 11
Frage
_______ is any solid, liquid or vaprous contaminants that leaves the boiler with the steam
Antworten
-
carryover
-
blowdown
-
feedwater
-
mist