Chapter 7- Boiler Water Treatment

Question 1

What is Feedwater?

Answer 1

Water that is treated for use in the boiler

Question 2

What is boiler water?

Answer 2

Water in the boiler that is used to produce steam

Question 3

What is Dissolved Solids?

Answer 3

Are impurities such as calcium, silica, and iron that have dissolved into solutions

Question 4

What is boil out?

Answer 4

The process of boiling a solution of water and cleaning g chemicals in a newly installed or repaired boiler

Question 5

What is scale?

Answer 5

The accumulation of minerals such as calcium and magnesium on the water side of boiler heating surfaces

Question 6

What is Silica?

Answer 6

A substance found in sand and some water that can form scale

Question 7

What is hard water?

Answer 7

Water that contains large quantities of dissolved minerals

Question 8

What is soft water?

Answer 8

Water that contains small quantities of dissolved minerals

Question 9

What is a Nonadhering Sludge?

Answer 9

A collection of muddy mineral sediment that can be discharged while suspended in boiler water

Question 10

What is Corrosion?

Answer 10

The rusting or putting of boiler metal

Question 11

What is an oxygen scavenger chemical?

Answer 11

A chemical that combines with oxygen to form harmless compounds for removal from the boiler

Question 12

What is Sodium sulfite?

Answer 12

Is an oxygen scavenger that is commonly used to treat boiler water

Question 13

What is caustic embrittlement?

Answer 13

A condition where exposure to highly alkaline elements causes boiler metal corrosion at stress zones in the boiler

Question 14

What is priming?

Answer 14

A condition that occurs when large slugs of boiler water are carried into the steam line

Question 15

What is carryover?

Answer 15

A condition that occurs when small particles of boiler water are carried into steam lines

Question 16

What is a High surface tension?

Answer 16

A boiler water condition in which the surface of the water is strengthened by a layer of impurities

Question 17

What is Foaming?

Answer 17

A boiler water condition caused by the formation of steam bubbles trapped below a film on the boiler water surface

Question 18

What does foaming prevent?

Answer 18

Foaming prevents proper heat transfer of heating surface, causing dangerous overheating

Question 19

What is a blister?

Answer 19

A condition of the boiler shell in which a bludge occurs from a separation of the boiler shell metal

Question 20

What is a Bag?

Answer 20

Is a bulge or deformed area of the boiler shell that extends through the entire thickness caused by localized overheating

Question 21

What is boiler water analysis?

Answer 21

Boiler water analysis tests the condition of boiler water and is used to determine the feedwater treatment required

Question 22

What is Alkalinity?

Answer 22

The ability of a compound dissolved in water to neutralize acids and is indicated by its pH level

Question 23

What is pH?

Answer 23

A measure of the acid-alkaline balance of a solution and is indicated on a scale from 0-14

Question 24

A solution with a pH less than 7 is acidic

A solution with a pH of 7 is neutral

A solution with a pH higher than 7 is alkaline

Answer 24

.

Question 25

What is Hardness?

Answer 25

The amount of dissolved calcium and magnesium in water

Question 26

What is a reagent?

Answer 26

A chemical used in a water treatment test to indicate the presence of a specific substance

Question 27

What is a titration test?

Answer 27

A water treatment test using a reagent to determine the concentration of a specific dissolved substance

Question 28

What is a conductivity meter?

Answer 28

An instrument used to determine total dissolved solids present in boiler water

Question 29

What is conductivity?

Answer 29

The ability of a material to pass electrons (electricity)

Question 30

What is an External boiler water treatment?

Answer 30

Is treating the water (feedwater) before it enters the boiler

Question 31

What can be removed by heating the feedwater?

Answer 31

Oxygen and non condensable gases

Question 32

What is a pre-treatment equipment?

Answer 32

Is equipment used before boiler water treatment chemicals are added to feedwater directed to the boiler

Question 33

What is a Water softener?

Answer 33

Is boiler water pre-treatment equipment that is used to remove calcium and magnesium to reduce hardness

Question 34

What is a zeolite water softener?

Answer 34

Softens water by replacing calcium and magnesium with sodium

Question 35

What is a Zeolite?

Answer 35

Is the mineral group that includes silicates of aluminum, sodium, and calcium used to soften water

Question 36

What is a Deaerator?

Answer 36

Is a boiler water treatment accessory that heats the feedwater to the Temperature of saturated steam at the pressure within a pressure vessel

Question 37

What is Saturated Steam?

Answer 37

Is pure steam at a temperature that corresponds to the boiling point of water at the steam pressure

Question 38

What is a Package feedwater system?

Answer 38

A tank, pumps, and controls used to heat feedwater

Question 39

What is a surge tank?

Answer 39

A large condensate receiver that is used to collect condensate before it is directed to the boiler or deaerator

Question 40

What is a bypass feeder?

Answer 40

A water treatment accessory that introduces water treatment chemicals in a loop

Question 41

What is a chemical feed system?

Answer 41

A water treatment system that introduces feedwater treatment chemicals into a boiler at a predetermined and controlled rate

Question 42

What is a internal boiler water treatment?

Answer 42

Is treating boiler water after it has entered the boiler

Question 43

How many times my the boiler water be tested?

Answer 43

Daily

Question 44

What is a blowdown?

Answer 44

Is the process of evacuating (discharging) water and undesirable accumulated material