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1st Year Low Pressure Boiler > Chapter 1- Boiler Operation Principles > Flashcards

Chapter 1- Boiler Operation Principles Flashcards

1
Q

What is a Boiler?

A

Is a closed metal container (pressure vessel) in which water is heated to produce steam or heated water

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2
Q

What is Steam?

A

Is vapor that forms when water is heated to its boiling point.

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3
Q

What is Heating Surface?

A

Is the part of the boiler where water is on one side and heat from gases of combustion on the other

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4
Q

What happens when you increase the sir of the combustion chamber?

A

By increasing the combustion changer you are increasing the heating surface

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5
Q

What is an Internal Furnace?

A

Is a furnace in a boiler that is surrounded by heating surface

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6
Q

What is a Condensate?

A

Is steam that has lost its heat and has turned to water

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7
Q

What is Make up water?

A

Make up water is added to a boiler to make up the water loss due to leaks or lost condensate

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8
Q

What is Feed Water?

A

Is water that is treated for use in a boiler

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9
Q

What is a Back-Flow preventer?

A

Is a boiler accessory that prevents the flow of water back to the portable water supply

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10
Q

What is Thermodynamics?

A

Is the science of thermal energy (heat) and how it transforms to and from other forms of energy

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11
Q

What is the First Law of Thermodynamics?

A

It states that chemical energy in the reactants equals the thermal energy in the products

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12
Q

What is the Second Law of Thermodynamics?

A

It states that heat always flows from a material at a high temperature to a material at a low temperature

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13
Q

What is Gases of Combustion?

A

They are gases produced by the combustion process in a boiler and discharged to the atmosphere

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14
Q

What is Heat?

A

Is the form of energy identified by a temperature difference or a change of state

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15
Q

What are the three changes of state for all substances?

A

Solid, Liquid, and Gas

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16
Q

What is a Solid?

A

Is a substance without an internal cavity that has a definite size and shape

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17
Q

What is a Liquid?

A

Is a substance that flows freely and has a definite volume but no independent shape

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18
Q

What is a Gas?

A

Is a substance that had no definite volume or independent shape that expand indefinitely

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19
Q

What is a change of state?

A

Process of removing heat or adding heat to change a substance from one physical state to another

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20
Q

What is sensible heat?

A

Change in temperature that can be measured by a thermometer or sensed by a person

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21
Q

What is latent heat?

A

Is heat identified by a change of state and no temperature change of substance

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22
Q

What is a BTU?

A

British Thermal Unit and its the amount of heat needed to raise 1lb of of by 1 degree f

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23
Q

What is Temperature?

A

Measurement of degree or intensity of heat

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24
Q

What is a Glass Thermometer?

A

A graduated glass tube that is filled mercury or alcohol that expands when heated

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25
What are the temps in the boiler commonly expressed as?
Fahrenheit or Celsius
26
What is 0 degrees, 32 and 212?
0 degrees is the freezing point for Salt Water, pure water is 32, boiling water is 212
27
What is Heat transfer?
Movement of heat from one material to another
28
What is heat transferred by?
By conduction, convection and or radiation
29
What is temperature difference?
Is difference between the temperatures of two materials
30
What is Conduction?
Is heat transfer that occurs when molecules in a material are heated and heat is passed to one molecule through molecule from material
31
What is convection?
Heat transfer that occurs when currents circulate between warm and cool regions of a fluid
32
What is Radiation?
Heat transfer that occurs as radiant energy without a material carrier
33
What is Combustion?
Rapid union of oxygen with an element or compound that results in the release of heat
34
What are the 3 types of combustion?
Perfect, complete, and incomplete
35
What is perfect combustion?
Combustion that occurs when all the fuel is burned using only the theoretical amount of air
36
What is complete combustion?
Combustion that occurs when all the fuel is burned with a minimum amount of excess air remaining
37
What is a incomplete combustion?
Combustion that occurs when all the fuel is not burned
38
What is Primary air?
Is the air supplied to a burner to mix directly with gas or to atomize fuel oil and control the rate of combustion
39
What is Secondary air?
The air supplied to the furnace to control combustion efficiency by controlling how completely the fuel is burned
40
What is excess air?
Air supplied to the burner above the theoretical amount
41
What is Atomization?
The process of reducing fuel oil into a fine spray of minute particles
42
What is Saturated Steam?
Is pure steam at a temperature that corresponds to the boiling point of water at a specific pressure
43
What is a feedwater system?
Is a boiler system that supplied the proper amount of water to the boiler
44
What is fuel system?
A boiler system that provides fuel for combustion’s to produce necessary heat in boiler
45
What is a draft system?
A boiler system that regulates the flow of air to and from the burner
46
What is steam system?
A boiler system that collects, controls, and distributes the steam produced in boiler
47
What is BHP (Boiler Horsepower)?
The power required to evaporate 34.5lb/hr of water at a temperature of 212
48
What is Atmospheric pressure?
Pressure caused by the weight of air surrounding the earth
49
What is Absolute pressure?
Is the sum of gauge pressure and atmospheric pressure
50
What is (MAWP)?
Maximum Allowable Working Pressure and it is the maximum pressure in pounds per square inch (psi) at which a boiler can safely be operated
51
What is a fire tube boiler?
A boiler where the fire goes in the Morrison tube and it goes to tubes that is surrounded by water
52
What is a water tube boiler?
A boiler where water goes through the tubes surrounded by gases of combustion
53
What is a Low pressure steam heating boiler?
Is a boiler that operates in low pressure that does not go over 15 psi
54
What is a low pressure hot water heating boiler?
Boiler in which water is heated to supply hot water at pressure not more that 160 psi and temp not more that 250 f
55
What is a package boiler?
A boiler that is preassembled at the factory
56
What is a tube sheet?
That’s where the tubes are mounted on
57
What is a pass?
Is the path or area where gases of combustion travel the length of the boiler
58
What is refractory?
Brick and or nonflammable material used to insulate the outer surface of the boiler from heat
59
What is a tube bank?
An assembly of tubes in the boiler
60
What is a cast iron boilers?
Is a boiler that has gases of combustion flowing around cast iron sections that contain water
61
What is an electric boiler?
A boiler that uses electrical heating elements to heat water for residential or light commercial hot water heating systems
62
What is a refuse boiler?
A boiler that uses the municipal solid waste that would normally go to landfills

1st Year Low Pressure Boiler (11 decks)

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