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