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Steamfitter/Pipefitter > Year 4 > Flashcards

Year 4 Flashcards

1
Q

The largest heat exchanger in a steam plant is the:

A

condensor

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2
Q

To prevent misting in the steam boiler, the steam drum is equipped with what?

A

Steam separator

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3
Q

What principle does a steam injector operate on?

A

Venturi principle

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4
Q

A steam boiler must have 2 means of feedwater makeup if over how many square feet?

A

500 square feet

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5
Q

What is the name of the device that controls super-heated steam?

A

Attemperator

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6
Q

What is the last heating device before feedwater enters the boiler?

A

Economizer

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7
Q

The exhaust steam line from a turbine requires what to clean the steam?

A

Oil separator

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8
Q

What prevents a boiler from collapsing when being dumped?

A

Manual air vent

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9
Q

Carryover in a steam boiler can cause what?

A

Water hammer

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10
Q

In a steam plant, what component use HP exhaust steam?

A

Closed feedwater heater

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11
Q

Name the two main types of steam plants

A

Condensing/non-condensing

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12
Q

What does a skimmer do in the steam drum?

A

Rid boil water of suspended particles and oil

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13
Q

The 2 valves on a boiler blow-off are what type?

A

Angle globe and quick opening

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14
Q

Using a series of flash tanks is referred to as what?

A

Cascading

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15
Q

A steam plant that exhausts steam to the atmosphere is called what?

A

Non-condensing

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16
Q

HTHW systems operate above what temperature and pressure?

A

250 degrees F/160 PSI

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17
Q

Which is the simplest type of cooling tower?

A

Natural draft

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18
Q

What is the minimum size of a blowoff line from a boiler over 100ft^2

A

1 inch

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19
Q

Which is the most common type of heat exchanger?

A

Tube and shell

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20
Q

What 3 factors affect the efficiency of a cooling tower?

A

Contact service, contact time, relative humidity

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21
Q

A piping system must be registered with ABSA is over what volume?

A

.5 cubic metres

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22
Q

How many pressure gauges should be used when pressure testing?

A

2

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23
Q

What device cleans the fireside of a watertube HP steamboiler?

A

Sootblowers

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24
Q

HTHW generators differ from watertube boilers in what way?

A

No steam drum

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25
Q

HTHW boiler construction is governed under what?

A

ASME Section 1

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26
Q

Coal ground into a fine powder is called what?

A

Pulverized

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27
Q

What is the duct between a boiler and the stack?

A

Breeching

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28
Q

What is the minimum sizing of feedwater line on a boiler over 100ft^2?

A

3/4 inch

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29
Q

What component is associated with a PSV?

A

Drip pan elbow

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30
Q

What must be done to a horizontal discharge pipe from a PSV?

A

Slash it at 45 degrees

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31
Q

A deaerator must be how high above the feedwater pump?

A

30 feet

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32
Q

A blow-off vessel must withstand what % of the boiler pressure?

A

30% up to 300 PSI

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33
Q

A fired pressure vessel is covered under what section of ASME?

A

Section 1

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34
Q

Where does exhaust steam come from?

A

Turbine

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35
Q

A boiler with over 500ft^2 of heating surface requires 2:

A

PSV’s/Feedwater makeup

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36
Q

What is the diameter of a flash leg?

A

6 inches or less

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37
Q

Flue gases travel through the firebox of a natural draft boiler via:

A

Convection currents

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38
Q

What type of fan creates a positive pressure inside a boiler furnace?

A

Forced draft

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39
Q

What type of fan creates a negative pressure inside a boiler furnace?

A

Induced draft

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40
Q

A boiler with both an induced and forced draft fan is referred to as what?

A

Balanced draft

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41
Q

Gases are removed from feedwater via the:

A

Deaerator

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42
Q

If no water is visable in a boiler sightglass what should the operator do?

A

Shut it down

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43
Q

When water particles are entrained in steam leaving the boiler, this is referred to as what?

A

Priming

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44
Q

How do you properly align the 3 pieces of a true Y?

A

Quarter and centre punch the pieces

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45
Q

How are steel tank bottoms protected from corrosion?

A

Impressed cathodic protection

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46
Q

Corrosion, due to electrolysis is caused by loss of what?

A

Electrons

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47
Q

Boyles law states what?

A

As pressure increases, volume decreases

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48
Q

Charles law states what?

A

As temperature increases, volume increases

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49
Q

What heating plant uses the earth as a heating source?

A

Geothermal

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50
Q

What type of water tube boiler has 3 drums?

A

A configuration

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51
Q

Which component removes large objects when treating wastewater?

A

Screens

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52
Q

When treating wastewater, what treatment removes phosphorous from the waste water?

A

Tertiary treatment

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53
Q

Hardwater causes what problem in a boiler?

A

Scaling

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54
Q

Concentrations of solids in boiler water are controlled by what?

A

Boiler blowdown

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55
Q

Reaming of medical tubing is recommended, true or false?

A

False

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56
Q

Solar heating systems relying on mechanical equipment for heat transfer are called:

A

Active solar systems

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57
Q

Medium temperature hydronic systems operate within what temperature range?

A

250 degrees F - 350 degrees F

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58
Q

What are the advantages of a HTHW heating over steam heating?

A

Less water treatment
less corrosion

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59
Q

What is one advantage of an active solar heating system over a passive system?

A

It is more compact

60
Q

Where is the hotwell located in a boiler feedwater system?

A

Between the softener and the deaerator

61
Q

What type of compressor uses a rotating action to compress refrigerant?

A

Rotary compressor

62
Q

What is the biggest disadvantage of the DDCV venting system?

A

It is inefficient

63
Q

Flash tanks produce what?

A

Flash steam

64
Q

Helical gear compressors have 2 mating:

A

Grooved rotors

65
Q

A cooling tower with a fan is called:

A

Mechanical

66
Q

The driving force for turbine pumps is:

A

Steam

67
Q

Tubes in a ‘hex’ are supported by what?

A

Baffles

68
Q

Deposits in ‘hex’ is called what?

A

Fouling

69
Q

Who enforces Alberta’s boiler regulations?

A

ABSA

70
Q

Condensate from the condenser re-enters the feedwater system at the:

A

Hotwell

71
Q

Boilers employ moving furnace grates use what fuel?

A

Solid fuel

72
Q

Smelt from a recovery boiler goes where?

A

Dissolving tank

73
Q

The steel boilers are rated by:

A

Steel boiler institute

74
Q

Regenerative air heaters transfers heat from the flue gases to combustion air using:

A

Large metal wheel

75
Q

Coal-fired power plants are a major source of:

A

Wastewater

76
Q

What uses gravity to settle out large particulates in power plants?

A

Ash ponds

77
Q

One of the largest contributors of food processing wastewater is:

A

The dairy industry

78
Q

2 types of oil separators are:

A

API and Parallel plate separator

79
Q

A HTHW generator are designed for what systems?

A

Heating and processing systems

80
Q

The removal of grit in wastewater treatment is important to prevent what?

A

Silting and pump damage

81
Q

The most common form of mine wastewater treatment is the use of what?

A

Tailings ponds

82
Q

What device is an electric component that extracts heat from one place and transfers it to another?

A

Heat pump

83
Q

What component prevents liquid refrigeration from going to the compressor?

A

The accumulator

84
Q

What device captures heat from building exhaust air and transfers it to fresh air entering the building?

A

HRV

85
Q

What type of a HRV system can cause an air pressure difference between the inside and outside of a building?

A

Unbalanced system

86
Q

What standard is used for medical gas installation?

A

CSA Z7396.1

87
Q

Labels for oxygen gas must be what colour?

A

Green lettering on a white background

88
Q

Labels for medical gas must be a maximum of how far apart?

A

20 feet

89
Q

The maximum horizontal support spacing for 1/2” medical piping is how far?

A

Every 6 feet

90
Q

The minimum size of pipe used in a medical gas system is what size?

A

1/2 inches

91
Q

The outlets of medical gas terminal units are designed to prevent what?

A

Cross-connections

92
Q

A minimum of how many brazed joints must be inspected per medical gas installation?

A

3 joints

93
Q

Because medical gas is deemed to be a critical installation and the source of supply will require what?

A

Redundances

94
Q

What is used to supply gas for smaller installations or as reserve supply for larger installations?

A

High pressure gas cylinders

95
Q

What system is only used to remove the exhaled anaesthetic gas from a patient?

A

96.AN AGSS System

96
Q

What is the minimum pressure test for medical gas piping?

A

150 PSI

97
Q

All defective components on a medical gas system shall be:

A

Repaired immediately

98
Q

Which geothermal heating system draws water up through a well directly to a heat exchanger where heat is extracted?

A

Open loop system

99
Q

Which geothermal heat exchanger is a series of loops placed in a body of water?

A

Pond heat exchanger

100
Q

In what geothermal system is the refrigerant used in the ground heat exchanger, instead of an antifreeze solution?

A

DX system

101
Q

Which geothermal system is employed where space isn’t limited and consists of 2 pipes placed side-by-side in a trench? (3 to 10m)

A

Horizontal closed loop system

102
Q

What separates the interior and exterior environments of a building?

A

Building envelope

103
Q

What is the term for radiation that is reflected from the earths surface?

A

Albedo

104
Q

The 2 types of solar space heating are:

A

Active and passive

105
Q

A combination of active and passive solar heating systems are called:

A

Hybrid systems

106
Q

Evacuated tube collectors are used for hydronic heating or what else?

A

Domestic hot water heating

107
Q

There are over how many designated trades and occupations in Alberta?

A

50

108
Q

What percent of the apprentices’ training takes place on the job?

A

80%

109
Q

The Alberta Apprenticeship and Industry Training (AIT) Board is appointed by the Lieutenant Governor and consists of how many members?

A

A chair and 12 members

110
Q

The industry accepted standard for excellence in a trade in Canada is:

A

The Red Seal

111
Q

Industry practitioners are people that work where?

A

Work hands on in the trade

112
Q

What is the foundation document for designing the red seal exam?

A

The NOA

113
Q

What is one disadvantage of a wet pipe sprinkler system?

A

Possible freezing

114
Q

A dry pipe sprinkle system is charged with what?

A

Air

115
Q

New hydraulic piping requires what prior to use?

A

Flushing and pickling

116
Q

Compressed gases in a hydraulic system cause what?

A

Foaming

117
Q

Where is the automatic drip ball valve located on a fire system?

A

Between siamese connection and check valve

118
Q

A new medical gas system is pressure tested with what gas?

A

Nitrogen

119
Q

What boiler requires a superheater?

A

A power boiler

120
Q

What is maximum size blow-off piping from a steam boiler with over 100 square feet heating surface?

A

1 inch

121
Q

Try cocks are used for what purpose?

A

Verify water level

122
Q

Closed feedwater heaters are what type?

A

Tube and shell

123
Q

What is the maximum water temperature in a deaerator?

A

212 degrees F

124
Q

A heat exchanger with the heating medium in the tubes is called a:

A

Immersion coil

125
Q

This prevents negative pressure in the building:

A

Make-up air unit

126
Q

What is another name for double back elbow?

A

Lobster-back

127
Q

On the jobsite, who receives and checks materials?

A

QCI

128
Q

On the jobsite, who looks after the welders?

A

Site superintendent

129
Q

On the job site, who does the QCM work for?

A

The company doing the piping

130
Q

What is the ASME code covering piping attached to power boiler?

A

B31.1

131
Q

What mechanism, in solid fuel boilers, extinguishes the fire if water level is low?

A

Fusable plug

132
Q

Try cocks for a boiler are attached to what?

A

Water column

133
Q

Which is the most popular steel package boiler?

A

Scotch marine

134
Q

What is the standard size of a sprinkler head?

A

1/2 inch

135
Q

Sprinkler heads are always open on what system?

A

Deluge

136
Q

What is roughing?

A

Fine rusting

137
Q

The mixing of hydraulic fluids can cause what?

A

A gummy deposit

138
Q

75% of fire systems are what type?

A

Wet

139
Q

What should the range on a pressure test gauge be?

A

1 1/2 to 4 times working pressure

140
Q

What device prevents flashback in a pipe?

A

Flame arrestor

141
Q

Class I standpipes can be used by who?

A

Trained professionals

142
Q

The requirements set out for standpipe systems are found in:

A

NFPA #25

143
Q

A boiler with the furnace outside the shell and surrounded by brickwork is what type?

A

External furnace

144
Q

What must be the side clearances when installing a LP boiler?

A

18 inches

145
Q

What is one of the most common problems with a new steam or hydronic heating system?

A

Improper cleaning of pipes

146
Q

The minimum length of a cooling leg from a heating coil to a steam trap should be:

A

5 feet

Steamfitter/Pipefitter (2 decks)

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