Test2

Question 1

Provided at utility stations throughout the plant for operation of plant equipment and tools

Answer 1

service air

Question 2

used in maintenance shops

Answer 2

shop air

Question 3

service air that has been dried to a low dew point to prevent freezing of the equipment starter.

Answer 3

starting air

Question 4

What does a plant air system consist of?

Answer 4

Compressor, Knockout drum, Air Dryers, Moisture analyzer, Nitrogen pipeline.

Question 5

Compressor has what 2 types of systems?

Answer 5

Lube and oil, which cools and lubricates compressor. & Cooling water system, which cools the compressed air.

Question 6

What does the knockout drum do?

Answer 6

remove moisture and oil

Question 7

What does the air dryer do?

Answer 7

removes the remaining moisture, air must be very dry.

Question 8

What does moisture analyzer do?

Answer 8

Measures air dew point. Dewpoint is kept around -40 to -70 degrees F

Question 9

What is the purpose of the nitrogen

Answer 9

Maintains header pressure.

Available if there is a malfunction in air system**

Question 10

how does instrument air differ from plant air

Answer 10

it is pressured and dried 105 psig

Question 11

instrument air is used to

Answer 11

operate pneumatic instruments and controllers, drive equipment (pumps or drills), transport material (pneumatic conveying), purge equipment, and dry solids.

Question 12

T or F

instrument air uses the same compressor as pant air

Answer 12

true

Question 13

It is critical that what kind of air is always available?

Answer 13

Instrument air

Question 14

Instrument air must be free of what?

and why

Answer 14

dust, particulates, moisture, hydrocarbons, and other contaminants.
because it will prevent damage to instruments.

Question 15

What removes condensation?

Answer 15

O pots, air dryers, and water traps

Question 16

Instrument air must be what

Answer 16

very dry

Question 17

What is used as a backup in case dryer or compressor fails

Answer 17

nitrogen

Question 18

Plant air operates around what psig

Answer 18

125 psig

Question 19

Plant air can cause

Answer 19

injury to personnel or damage equipment. whipping hose, or flying debris

Question 20

why cant nitrogen be used as a gas?

Answer 20

Because it displaces oxygen and can kill you easily

Question 21

what is off gas?

Answer 21

off gas comes from the process (free) vs. natural gas which has supplements added to it.

Question 22

What is natural gas?

Answer 22

chemicaaly known as methane (NOT PURE METHANE)

Question 23

what are the 2 categories of natural gas?

Answer 23

Low Sulfur-Sweet natural gas, & High Sulfur-Sour Natural Gas

Question 24

Tech Responsibility:

Answer 24

monitoring both pressure of the receiver and the flow leaving the receiver.
Monitor liquid levels in knockout and surge drums
Change line and vessel filters
Operate and monitor scrubbers
Test system for leaks

Question 25

Saftey:

Answer 25

Highly Flammable (natural gas), serious safety issue,

Question 26

Fuel for burners can come from

Answer 26

naturaal gas, oil, coal, or fuel gas.

Question 27

Fuel gas is what?

Answer 27

Offgas and natural gas mixed together.

Question 28

Fuel samples are usually collected in what?

Answer 28

Tedlar bag

Question 29

Saftey: Fuel gas:

Answer 29

may contain H2S(Hydrogen Sulfide), is highly combustible. safety feature is DB&B double block & bleed system.

Question 30

steam generator

Answer 30

two sections ; the boiler and furnace.

Question 31

fire tub boiler

Answer 31

fire or heat is applied to the inside of the tube while the water is circulated on the outside.

Question 32

water tube boiler

Answer 32

water is inside the tube and fire on the outside

Question 33

steam drum

Answer 33

Central piece of equipment BFW enters Gets steam from risers

Question 34

mud drum

Answer 34

where impurities concentrate, blow down removes sediment

Question 35

Blow down

Answer 35

Gets rid of suspended solids

Question 36

SWELL

Answer 36

Steam demand instantly increases causing increase in steam drum level

Question 37

Shrink

Answer 37

Steam demand instantly decreases, causing decrease in steam drum level

Question 38

6 stages of water treatment

Answer 38

1. Clarification 2. Sedimentation 3. Filtration 4. Ion hardness 5. Deaeration 6. Adding one or more conditioning agents

Question 39

What is added to boiler to maintain correct PH

Answer 39

Caustic

Question 40

A steam distribution system is what kind of Loop

Answer 40

Closed loop

Question 41

Steam that has had some heat energy removed

Answer 41

Condensate

Question 42

Heat required is called

Answer 42

Latent heat

Question 43

Type of heat that can be sensed and measured

Answer 43

Sensible heat

Question 44

Bubbles in boiling water is a form of steam known as

Answer 44

Saturated steam

Question 45

Steam exiting at a higher temperature than it's saturation temperature is called

Answer 45

Super heated steam

Question 46

High pressure

Answer 46

600+ psig

Question 47

Medium pressure

Answer 47

200-600 psig

Question 48

Low pressure

Answer 48

15-200 psig

Question 49

Stations that have a valve and or injection of water or lower pressure steam

Answer 49

Letdown stations

Question 50

Why do we have expansion loops

Answer 50

Because the allow for expansion and contraction of piping

Question 51

Why do we recapture condensate?

Answer 51

It's pure and you use less fuel converting it back to steam. It is also already treated. It's the best economic choose for boiler feed water.

Question 52

Economize

Answer 52

Like a preheater

Question 53

Fire box

Answer 53

WHERE flame is

Question 54

Burner

Answer 54

Can be on side walk or Floor

Question 55

Tubes

Answer 55

Can be hanging many different ways

Question 56

What kind of pressure is in firebox

Answer 56

Negative. .05 in of water. Don't want stuff to flare out.

Question 57

Saturated steam

Answer 57

Just recently boiled

Question 58

Superheated steam

Answer 58

Had more energy added to it

Question 59

What is used to catch condensate

Answer 59

Steam traps

Question 60

What is used to get condensate out if it gets suck

Answer 60

Water hammer.

Question 61

What puts film down on metal so that water can't touch it

Answer 61

Passivator

Question 62

What eats or reacts to make neutral

Answer 62

Scavenger