B-06: Water Treatment

Question 1

(4-066-1.10) Dissolved gases, such as oxygen and carbon dioxide, can be removed by a process known as:

A. Deaeration
B. Sedimentation
C. Scrubbing
D. Clarification

Answer 1

A. Deaeration

Question 2

What is the purpose of corrosion coupons?

A. They are used to prevent galvanic corrosion
B. They attract corrosion products and keep them from depositing in the condensate system
C. They detect the presence of corrosive non-condensable gases
D. They are used to determine corrosion rates

Answer 2

D. They are used to determine corrosion rates

Question 3

(4-066-4.1) The component used to prevent wasting steam through a deaerator vent is a:

A. Cyclone separator
B. Chevron drier
C. Scrubber
D. Vent condenser

Answer 3

D. Vent condenser

Question 4

(4-067-1.9) To prevent scale formation, _______ is added to the boiler water.

A. Zeolite
B. Sodium chloride
C. Amine
D. Phosphate

Answer 4

D. Phosphate

Question 5

The P-Alkalinity is 220 ppm. The M-alkalinity is 240 ppm. What is the OH- alkalinity ?

A. 40 ppm
B. 0 ppm
C. 80 ppm
D. 200 ppm

Answer 5

D. 200 ppm

Question 6

Carbonates and bicarbonates do NOT enter boilers and steam systems in which way?

A. As alkalinity species originating in the source (raw) water supply
B. The rough the introduction of sodium carbonate for alkalinity control
C. Because of poorly functioning deaerators
D. Through vacuum breakers

Answer 6

D. Through vacuum breakers

Question 7

(4-067-3.10) Phenolphthalein is:

A. An indicator
B. A reagent
C. A buffer
D. A neutralizing agent

Answer 7

A. An indicator

Question 8

How often should corrosion coupons be removed and tested ?

A. Every six to twelve months
B. Every month
C. Every one to three weeks
D. Every one to three months

Answer 8

D. Every one to three months

Question 9

What is wood composed of?

A. Biofilm
B. Cellulose and lignin
C. Non-oxidizing biocides
D. Legionellea

Answer 9

B. Cellulose and lignin

Question 10

(4-067-3.9) Phenolphthealein:

A. Turns pink in the presence of hydroxide and carbonate
B. Is fed to cast iron boilers
C. Prevents caustic embrittlement
D. Indicates the presence of dissolved oxygen

Answer 10

A. Turns pink in the presence of hydroxide and carbonate alkalinity

Question 11

(4-067-3.5) Total alkalinity is measured:

A. Using methyl purple indicator and sulfuric acid
B. Using potassium iodide-iodate and EDTA
C. To control the concentration of oxygen scavenger
D. Using phenolphthalein and sulfuric acid

Answer 11

A. Using methyl purple indicator and sulfuric acid

Question 12

Poorly functioning deaerators:

A. Should be compensated for by increasing the amine feed
B. May overheat the feedwater
C. Permits scale forming compounds to enter the condensate system
D. Increase the likelihood of grooving and pitting corrosion in condensate systems

Answer 12

D. Increase the likelihood of grooving and pitting corrosion in condensate systems

Question 13

(4-066-1.1) Materials which are generally larger than 2 micrometers and that are dispersed throughout the water, are called:

A. Dissolved solids
B. Colloidal particles
C. Suspended matter
D. Dissolved matter

Answer 13

C. Suspended matter

Question 14

(4-066-2.2) Which of these processes removes suspended matter from plugged filter beds?

A. Regeneration
B. Flushing
C. Rinsing
D. Backwashing

Answer 14

D. Backwashing

Question 15

(4-067-1.5) Caustic embrittlement of boiler metal is promoted by:

A. Concentrations of sodium hydroxide
B. Concentration of sodium chloride
C. Overheating of boiler parts
D. Concentration of sodium sulfite

Answer 15

A. Concentrations of sodium hydroxide

Question 16

(4-066-1.13) Which of the following is an example of a dissolved solid?

A. Magnesium sulphate
B. Oxygen
C. Sand
D. Carbon dioxide

Answer 16

A. Magnesium sulphate

Question 17

(4-070-5.5) The principal cause of steel corrosion in cooling towers is:

A. Dissolved carbon dioxide
B. High pH
C. Dissolved oxygen
D. Low pH

Answer 17

C. Dissolved oxygen

Question 18

In cooling towers, heavy metals, oxidizing chemicals, and non-oxidizing chemicals are used to:

A. Inhibit corrosion
B. Inhibit biological fouling
C. Reduce scaling
D. Eliminate wood deterioration

Answer 18

B. Inhibit biological fouling

Question 19

What are dip slides used for?

A. To test a biological activity
B. To detect corrosion
C. To prevent delignification of wooden components
D. To detect dissolved gases

Answer 19

A. To test for biological activity

Question 20

If heating or cooling system water may come into contact with food products, _______ is used to keep the water from freezing.

A. Ethylene glycol
B. Methanol
C. Propylene glycol
D. Octyl alchohol

Answer 20

C. Propylene glycol