Chapter- 20-39

Question 1

What is the first thing to do when shutting down a boiler

Answer 1

Turn of the fire

Question 2

A flow control should be blown down when

Answer 2

Once per shift

Question 3

How often should you check the low water fuel cut off?

Answer 3

Once per shift

Question 4

Why is oil added to the refrigerant?

Answer 4

Lubrication of the compressor and

Keep refrigerant migrating

Question 5

Recycled and filtered refrigerant can be used where?

Answer 5

By the same owner in the same type of equipment

Question 6

Data printed on the equipment nameplate would include manufacturer, model, and serial number and _____________?

Answer 6

Stamp of approval from commissioning authority

Question 7

How many BTU does it take to raise 10 lbs of steam from 40 to 41 degrees?

Answer 7

1 BTU

Question 8

When working on a boiler permits should be required?

Answer 8

For every shift

Question 9

How many things do safety controls protect from?

Answer 9

Over pressure
Over heating
Fire side explosion

Question 10

What chemical compounds in water cause permanent hardness?

Answer 10

Calcium sulfite and magnesium silicate

Question 11

You have boiler water that is found to have a PH of 5. What compound do you add to neutralize?

Answer 11

Bases

Question 12

What produces soft scale?

Answer 12

Calcium carbonate and magnesium carbonate

Question 13

With normal oxygen and low alkalinity, what is added to boiler water?

Answer 13

Neutralizing amines

Question 14

What is hard forming scale?

Answer 14

Silica

Question 15

What chemicals are used to combat corrosion?

Answer 15

Sodium sulfite and hydrazine

Question 16

Which chemicals are used to combat scale

Answer 16

Combined phosphate treatment

Question 17

Which compound not heat produce?

Answer 17

Nitrogen

Question 18

What takes no actual action in combustion?

Answer 18

Nitrogen

Question 19

With hydrogen present and normal oxygen levels which chemical will cause problem?

Answer 19

Chlorine