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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
Q

What are the temps in the boiler commonly expressed as?

A

Fahrenheit or Celsius

26
Q

What is 0 degrees, 32 and 212?

A

0 degrees is the freezing point for Salt Water, pure water is 32, boiling water is 212

27
Q

What is Heat transfer?

A

Movement of heat from one material to another

28
Q

What is heat transferred by?

A

By conduction, convection and or radiation

29
Q

What is temperature difference?

A

Is difference between the temperatures of two materials

30
Q

What is Conduction?

A

Is heat transfer that occurs when molecules in a material are heated and heat is passed to one molecule through molecule from material

31
Q

What is convection?

A

Heat transfer that occurs when currents circulate between warm and cool regions of a fluid

32
Q

What is Radiation?

A

Heat transfer that occurs as radiant energy without a material carrier

33
Q

What is Combustion?

A

Rapid union of oxygen with an element or compound that results in the release of heat

34
Q

What are the 3 types of combustion?

A

Perfect, complete, and incomplete

35
Q

What is perfect combustion?

A

Combustion that occurs when all the fuel is burned using only the theoretical amount of air

36
Q

What is complete combustion?

A

Combustion that occurs when all the fuel is burned with a minimum amount of excess air remaining

37
Q

What is a incomplete combustion?

A

Combustion that occurs when all the fuel is not burned

38
Q

What is Primary air?

A

Is the air supplied to a burner to mix directly with gas or to atomize fuel oil and control the rate of combustion

39
Q

What is Secondary air?

A

The air supplied to the furnace to control combustion efficiency by controlling how completely the fuel is burned

40
Q

What is excess air?

A

Air supplied to the burner above the theoretical amount

41
Q

What is Atomization?

A

The process of reducing fuel oil into a fine spray of minute particles

42
Q

What is Saturated Steam?

A

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

43
Q

What is a feedwater system?

A

Is a boiler system that supplied the proper amount of water to the boiler

44
Q

What is fuel system?

A

A boiler system that provides fuel for combustion’s to produce necessary heat in boiler

45
Q

What is a draft system?

A

A boiler system that regulates the flow of air to and from the burner

46
Q

What is steam system?

A

A boiler system that collects, controls, and distributes the steam produced in boiler

47
Q

What is BHP (Boiler Horsepower)?

A

The power required to evaporate 34.5lb/hr of water at a temperature of 212

48
Q

What is Atmospheric pressure?

A

Pressure caused by the weight of air surrounding the earth

49
Q

What is Absolute pressure?

A

Is the sum of gauge pressure and atmospheric pressure

50
Q

What is (MAWP)?

A

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
Q

What is a fire tube boiler?

A

A boiler where the fire goes in the Morrison tube and it goes to tubes that is surrounded by water

52
Q

What is a water tube boiler?

A

A boiler where water goes through the tubes surrounded by gases of combustion

53
Q

What is a Low pressure steam heating boiler?

A

Is a boiler that operates in low pressure that does not go over 15 psi

54
Q

What is a low pressure hot water heating boiler?

A

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
Q

What is a package boiler?

A

A boiler that is preassembled at the factory

56
Q

What is a tube sheet?

A

That’s where the tubes are mounted on

57
Q

What is a pass?

A

Is the path or area where gases of combustion travel the length of the boiler

58
Q

What is refractory?

A

Brick and or nonflammable material used to insulate the outer surface of the boiler from heat

59
Q

What is a tube bank?

A

An assembly of tubes in the boiler

60
Q

What is a cast iron boilers?

A

Is a boiler that has gases of combustion flowing around cast iron sections that contain water

61
Q

What is an electric boiler?

A

A boiler that uses electrical heating elements to heat water for residential or light commercial hot water heating systems

62
Q

What is a refuse boiler?

A

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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