Chapter 3

Question 1

How is the number of blowdowns determined by water chemistry?

Answer 1

The more the impurities, the more blowdowns must be performed

Question 2

The number of blowdowns required is determined by _______

Answer 2

Water Chemistry

Question 3

A boiler with very clean water does not require water treatment.

Answer 3

False

Question 4

A boiler with water at a pH level of 7 will be considered alkaline/basic.

Answer 4

False

Question 5

Oxygen causes:

Answer 5

corrosion and pitting

Question 6

If substance has a pH level that is above 7 is considered to be:

Answer 6

Basic

Question 7

If substance has a pH level that is 7 it is considered to be:

Answer 7

Neutral

Question 8

If substance has a pH level that is below 7 it is considered to be:

Answer 8

neither neutral nor basic

Question 9

When a boiler has an unsafe level of water, what device is electronically activated ?

Answer 9

Fuel solenoid valve- which shuts off the fuel supply

Question 10

As solids and alkalinity in boiler water increase

Answer 10

waterside scaling is increased

Question 11

Which of the following would cause scale to form in a low pressure boiler?

Answer 11

Calcium and magnesium

Question 12

Blowing down is most effective when the steam output is ________

Answer 12

at a low rate

Question 13

A pressure reducing valve (PRV) is used on a feedwater line when the domestic water supply is city water.

Answer 13

True

Question 14

Impurities that increase the density of the boiler water are removed by:

Answer 14

both bottom and surface blowdown

Question 15

What chemical would be used to control alkalinity in a boiler?

Answer 15

Caustic soda

Question 16

Why should the gauge glass on a steam boiler be blown down regularly?

Answer 16

to remove dirt and sediment from the glass

Question 17

Bottom blowdown works best when the boiler is in high fire

Answer 17

False

Question 18

The primary function of adding make-up water to a system is to:

Answer 18

to replace water lost through evaporation, leaks, or other processes

Question 19

What will excessive oxygen in the boiler water cause to take place?

Answer 19

pitting of boiler metal

Question 20

Sediment can be removed by performing a bottom blowdown.

Answer 20

True

Question 21

What chemical would be used to control scale in a low pressure boiler?

Answer 21

Phosphate

Question 22

Boiler water is treated to remove nitrogen from the water.

Answer 22

False

Question 23

The main reason make-up water is added to the boiler is to:

Answer 23

Replenish water that has been lost and to supply enough water to keep the proper amount of steam flowing