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MK1 EOCT AUXILIARY EQUIPMENT > Principles of Operation for an Auxiliary Boiler > Flashcards

Principles of Operation for an Auxiliary Boiler Flashcards

1
Q

A boiler is a container used to produce WHAT?

A

Steam or hot Water

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2
Q

The function of auxiliary boilers is to supply steam or hot water for the following applications:

A
  • Heating Systems
  • Galley Equipment
  • Evaporators
  • Laundry Rooms
  • Water Heaters
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3
Q

Name three things needed to produce steam or hot water.

A
  • Water
  • Heat (produced by an oil burner)
  • Container to hold water & steam (boiler)
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4
Q

There are two types of Auxiliary Boilers:

A
  • Firetube boilers
  • Watertube boilers
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5
Q

Operating auxiliary boilers includes doing the following:

A
  • Prelight-off Checks
  • Lighting Off
  • Monitoring
  • Securing the boiler
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6
Q

Before attemping to light off any boiler, become familiar with the Unit’s Operating Procedures and The ___________.

A

Manufacturer’s Operating Manuals

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7
Q

Advantages of a Firetube Boiler are:

A
  • Inexpensive to build
  • Simple to operate
  • Less maintenance
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8
Q

Dis advantages of a firetube boiler are:

A
  • Long warm-up time
  • Weight of unit compared to the amount of steam produced
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9
Q

The advantages of a Watertube Boiler are:

A
  • Less warm-up time
  • Ratio of size and weight to steam produced
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10
Q

Dis advantages of a Watertube Boiler are:

A
  • Requires more maintenance
  • Expensive to build
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11
Q

Steam results when sufficient heat is added to water which causes it to?

A

Vaporize (boil)

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12
Q

The temperature at which water boils is called the?

A

Boiling Point or Saturation Point

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13
Q

Notice that the pressure and saturation temperature are driectly proportional. This relationship is called?

A

A Pressure/Temperature Relationship

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14
Q

Two types of heat are:

A
  • Sensible Heat
  • Latent (hidden) Heat
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15
Q

Heat is applied to room temperature water. The temperature of the water rises. This is called?

A

Sensible Heat

Sensible Heat causes a change in temperature

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16
Q
  • Causes a change in state
  • Does not cause a change in temperature
A

Latent Heat

The temperature remains constant until the water has vaporized.

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17
Q

Two types of Latent Heat:

A
  • Vaporization
  • Condensation
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18
Q

Heat is added to make steam or?

A

“Latent Heat of Vaporization”

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19
Q

Remove heat from steam and the steam changes from gas to liquid. This heat is termed?

A

“Latent Heat of Condensation”

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20
Q

After the last drop of water is vaporized and heat is continued to be added, the temperature of the steam begins to rise again. Again a complete change of state has taken place and the heat is term “sensible heat”.

A

Superheated Steam

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21
Q

The steam is said to be ____, because it is at a temperature above it’s Saturation Point.

A

Superheated

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22
Q

Steam that is at the temperature and pressure that it was formed is called?

A

Saturated Steam

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23
Q

All auxiliary boilers in the CG produce?

A

Saturated Steam

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24
Q

Steam which contains 20% moisture is considered?

A

80% quality

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25
Q

Steam which contains 50% moisture is considered?

A

50% quality

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26
Q

Steam which contains 70% moisture is considered?

A

30% quality

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27
Q

As the saturated steam gives up its heat, the steam returns back to its liquid state. This liquid is called?

A

Condensate

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28
Q

The source of water for the boiler is called?

A

Feedwater

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29
Q

The condensate tank is filled from the potable water system when there are:

A
  • Leaks
  • Blowdowns
  • Discharge of steam to the atmosphere
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30
Q

The condensate tank is separated from the steam users by the means of a “_____”.

A

Steam Trap

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31
Q

Allows condensate to flow back to the condensate tank but trap the steam.

A

Steam Trap

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32
Q

Steam Traps that are most commonly used by the CG are?

A
  • Thermostatic Float Type
  • Inverted Bucket Type
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33
Q

Gauge Pressure PSI 0.0 = Saturation Temperature???

A

212.0 degrees fahrenheit

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34
Q

Gauge Pressure PSI 2.3 = Saturation Temperature???

A

219.4 degrees fahrenheit

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35
Q

Gauge Pressure PSI 30.3 = Saturation Temperature???

A

274.5 degrees fahrenheit

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36
Q

Gauge Pressure PSI 50.3 = Saturation Temperature???

A

298.0 degrees fahrenheit

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37
Q

Gauge Pressure PSI 100,0 = Saturation Temperature???

A

337.9 degrees fahrenheit

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38
Q

Gauge Pressure PSI 145.3 = Saturation Temperature???

A

353.5 degrees fahrenheit

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39
Q

In preparation for troubleshooting the auxiliary boiler, identify:

A
  • System components
  • Subsystem effects on the auxiliary boiler
  • Equipment operation procedures
  • Standard operating procedures
  • any potential hazards
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40
Q

_______ must be kept clean.

A

Blower assembly

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41
Q

A excessive buildup of dirt and grime causes an inadequate amount of air supply for combustion and results in a _______.

A

dirty, smokey flame

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42
Q

The frequency that blowdowns are performed depends on the boiler water test; however, perform a blowdown at least _______.

A

every 72 hours

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43
Q

The _______ is located at the point on the boiler where the water and the steam meet.

A

surface blowdown valve

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44
Q

_________ are used to control boiler water chloride and non-detergent lubricating oils and to reduce over teatment of chemicals.

A

Surface blowdowns

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45
Q

Slowly open surface blowdown valve until sufficient blowdown has taken place, approximately ________.

A

20 to 30 seconds

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46
Q

The _______ is located at the lowest point on the boiler.

A

Bottom Blowdown Valve

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47
Q

Bottom blowdowns are used to control ______ in the boiler shell.

A

Sludge

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48
Q

The ______ and ______ are relatively maintenance free.

A

Air Deflector and Nozzle Centering Stabilizer

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49
Q

Inspect the combustion diffuser cone anytime fireside maintenance is performed for:

A
  • Soot buildup due to a misfiring nozzle
  • Warpage
  • Melted cone
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50
Q

When the cone is warped or melted, it must be_____.

A

Replaced

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51
Q

Three basic adjustments made on all Electrodes include:

A
  • Gap between the tips of the Electrodes
  • Height above the top of the nozzle
  • Distance from the side or center of the nozzle
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52
Q

Soot from the ______ builds up and needs to be cleaned.

A

Combustions Gases

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53
Q

The _______ are cleaned with a wooden pick and approved solvent.

A

Distibutor and Orfice

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54
Q

The screen is cleaned with an _______.

A

Approved Solvent

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55
Q

The fireside is where ______ takes place.

A

Combustion

56
Q

_______ is a product of combustion and build up on the fireside.

57
Q

Soot build up must be removed to aviod inefficient boiler operation cause by:

A
  • Restricted airflow through boiler results in back-pressure in the furnace.
  • Soot build up on tubes has an insulating effect and blocks heat transfer from hot combustion gases to the water in the boiler
58
Q

DO NOT use wire brush to remove soot from any insulation found in the fireside as damage will occur. Light brushing with a ______will remove this soot.

A

Natural Fiber Brush

59
Q

After removal of soot is complete, inspect firesides for any sign of __________.

A

Wear or water leakage

60
Q

Most fuel pumps used on auxiliary boilers are ______ with an internal bypass regulator.

A

two-stage internal gear-type pumps

61
Q

A two stage pump contains two sets of gears. One set acts as the suction gears to draw the fuel into the pump. The other set, known as the ______, delivers the fuel under sufficient pressure to atomize.

A

Pressure Gears

62
Q

________ pumps contain a single set of gears which perform both functions as the suction and pressure gears on a two-stage pump.

A

Single-Stage Pumps

63
Q

In addition to the in-line fuel strainers in the supply piping to the fuel pump, there is a pump driven, self cleaning, rotary type of ______ incorporated in the design of the pump itself.

A

Fuel Filter

64
Q

________ are access plates which may be removed for inspection of internal areas such as the waterside of an auxiliary boiler.

A

Handhold Covers

65
Q

Monitoring the boiler includes checking:

A
  • Fuel Pressure
  • Fuel Pump Suction
  • Ignition
  • Steam Pressure
  • Water levels in boiler and feedwater tank
  • Fuel, steam and water leaksDevices
66
Q

Designed to shutdown the burner and prevent flooding of the furnace with fuel in the event of ignition failure or flame failure.

A

Safety Combustion Controls

67
Q

Two type of Safety Combustion Controls are:

A
  • Photoelectric Eye
  • Photoconductive Eye

NOTE: These types of controls must be kept clean to work properly.

68
Q

Fuel pump inlet pressure should not exceed _____ in order to comply with the National Fire Protection Association’s Bulletin 31.

A

3-psi gauge

69
Q

What is the oil pressure desired set point for Way-Wolff and Johnston Boilers?

A
  • 100 psi for the Way-Wolff Boiler
  • 210 psi for the Johnston Boiler
70
Q

Handhold covers provide access for the inspection of the waterside on boilers. Inspect the handhold cover _____ for leaks.

71
Q

Leaks allowed to exist for a length of time may_____.

A

“Wire Draw”

72
Q

Remove scale during waterside maintenance by washing with a high pressure water hose at what psi?

73
Q

What is the adjustment for the Air Damper if you see Black Smoke?

A

Gradually open damper

74
Q

What is the adjustment for the Air Damper if you see Clear Exhaust?

A

Properly burning, no adjustment required

75
Q

What is the adjustment for the Air Damper if you see White Smoke?

A

Gradually close damper, do not close completely

76
Q

When black smoke from an auxiliary boiler is detected and the possible cause is “Improperly adjusted air damper. The remedy is?

A

Adjust air damper to allow more air (open)

77
Q

When black smoke from an auxiliary boiler is detected and the possible cause is “Deffective Nozzle. The remedy is?

A

Clean/renew nozzle per manufacture’s technical manual

78
Q

When black smoke from an auxiliary boiler is detected and the possible cause is “Defective fuel pump”. The remedy is?

A

Adjust regulator

79
Q

When black smoke from an auxiliary boiler is detected and the possible cause is “Dirty Blower”. The remedy is?

A

Clean blower wheel

80
Q

When black smoke from an auxiliary boiler is detected and the possible cause is “Insufficient air supply”. The remedy is?

A
  • Check for proper compartment air pressure
  • Check blower inlet for restrictions
81
Q

When a defective alarm will not silence, it indicates a defective _____.

82
Q

When alarm sounds but a light does not illuminate, it indicates a _______.

A

Defective Light Bulb

83
Q

The ______ is one of the most important components in the oil burner affecting efficient and trouble-free operation.

84
Q

A dirty or faulty nozzle can cause:

A
  • Reduced efficiency
  • Incomplete combustion
  • Soot accumulation
85
Q

Over a period of time, the lead sulfide detecor’s lens becomes dirty and can give_______ of flame failure.

A

False Indications

86
Q

If the FSC does not reset upon flame failure, the FSC is _______.

87
Q

the flame scanner monitors ________ generated by the combustion flame.

A

Infrared Wave Signals

88
Q

The Flame Scanner consist of 3 major components:

A
  • scanner lead and recepticle
  • lead sulfide plug-in cell
  • optical lens cap
89
Q

Flame Scanner assembly is defective if ______volts are not present.

A

15 to 20 volts

90
Q

An increase in the amount of vacuum on the fuel pump suction gauge may be an indication of the ______.

A

fuel filter becoming clogged

91
Q

A lower than normal discharge pressure from the fuel pump may indicate a _______.

A

Faulty fuel pump

92
Q

Surface blowdowns should be done daily or when the total dissolved solids exceed ______ PPM.

93
Q

When experiencing high steam pressure check the following:

A
  • Operating pressure control
  • High limit pressure control
94
Q

If high water persist, check the ________ and adjust if necessary.

A

Float-type water cut-out

95
Q

If low steam pressure persist, perform the following procedures:

A
  • Adjust Operative Pressure Control
  • Clean Firesides or Watersides
96
Q

Prior to adjusting pressure switches, ensure that a _______ steam pressure gauge is being used.

A

Calibrated

97
Q

All safety valves of each auxiliary boiler are tested ______ IAW PMS.

98
Q

Auxiliary boiler safety valves are steam tested on the boiler to determine correct operation at present pressures as follows:

A
  • Annually
  • After each hydrostatic test
  • After being removed or replaced
  • After being accidently lifted by water during hydrostatic testing
99
Q

________ prevents heat transfer and leads to overheating and eventually tube failure.

100
Q

After flushing the waterside of the boiler, refill boiler and hydrostatically test to_________.

A

75 psi for 15 minutes to check for leaks

101
Q

In the mid-1800’s, Michael Faraday, an English physicist and chemist, revealed the phenomenon now known as ____________.

A

Electromagnetic Induction

102
Q

Magnetic Water Testing eliminates:

A
  • Scale
  • Discharge of treatment chemicals to the environment
  • Need for acid cleaning
  • Exposure of personnel to treatment and cleaning chemicals
  • Need to purchase, store and dispose of hazardous teratment and cleaning chemicals
103
Q

Magnetic Water Testing reduces:

A
  • Waterside corrosion rate
  • PMS man-hours
  • Maintenance cost
104
Q

Magnetic Water Testing increases:

A
  • Boiler life
  • Boiler efficiency
  • Operating time between waterside inspections
105
Q

Utilizing MWT, boiler water is maintained within set parameters. These parameters are:

A
  • Alkalinity testing (pH): 8 to 11.5
  • Total dissolved solids (TDS): below 1000ppm
  • Chloride: less than 10 ppm
106
Q

_________ causes a pitting corrosion in the boiler.

107
Q

The presence of ______ indicates saltwater in the system.

108
Q

Saltwater entry usually occurs at leaks in ______ in the system.

A

raw water heat exchangers

109
Q

When the water in a boiler turns to steam, the minerals which are in the water remain. If left untreated, these minerals build up on the tubes forming _____.

110
Q

The ____ of the water indicates the acidity or alkalinity of the water.

111
Q

On a pH scal ranging from 0-14, _____ is neutral.

112
Q

Any value of pH below seven indicates that the water is ______.

113
Q

The lower the pH value the stronger the _____.

114
Q

Boiler water with a low pH can lead to _____.

A

Acidic Corrosion

115
Q

A pH value above seven indicates that the water is _____.

116
Q

The higher the pH value, the higher the ______.

A

Alkalinity

117
Q

Boiler water with excessively high pH (11.5 plus) leads to ________.

A

Caustic Embrittlement

118
Q

Boiler water testing for chloride is only required on cutters with raw water heat exchangers in the condensate return system and without ______.

A

Salinity (chloride) Detection Systems

119
Q

Once every ____ hours on a steaming boiler, sample the makeup feedwater, condensate tank and the boiler water.

120
Q

________ indicate the level of contaminates the water contains.

A

Total Dissolved Solids (TDS)

121
Q

When the pH rises above the set range or our TDS rises above 1000 ppm, a ______ is performed to drop the level back to the desired range.

A

Surface Blowdown

122
Q

For a “Bottom Blowdown” to be effective, take the boiler off line for ____ minutes to allow settling of the sludge.

A

30 Minutes

123
Q

Once a boiler is stablized with MWT, water chemistry usually remains within the recommended ranges for _____ days.

124
Q

Major waterside problems that occur in feedwater and boiler water are:

A
  • High or low pH levels (acidic corrosion or caustic corrosion)
  • Hardness (scale formation)
  • Chloride (pitting)
125
Q

The feedwater supply system consist of four major components:

A
  • Feed Pump Set
  • Feed stop and check valve
  • Feedwater pressure indicating gauge
  • Feedwater strainer
126
Q

The feedwater pump set includes the following components mounted on the channel base:

A
  • Centrifugal feedwater pump
  • Motor and drive coupling
  • Coupling (mounted on a channel base)
127
Q

Used to isolate the boiler from the feedwater system during those times of boiler nonuse.

A

Feed stop valve

128
Q

Used to prevent back pressure to the feedwater system while the pump is off.

A

Feed check valve

129
Q

Test the feedwater supply system on a ______ basis.

130
Q

Boilers are fitted with a MWT per ______.

A

SHIPALT 378-A-306

131
Q

Feedwater testing includes:

A
  • Alkalinity testing (pH)
  • Total Dissolved Solids (TDS) of the boiler
  • Hot well
  • Makeup water
132
Q

The recommended ranges for the boiler water parameters using MWT are:

A
  • Ph tester 8-11.5
  • TDS tester 1000 ppm or two times make-up TDS which ever is greatest
133
Q

After performing a blowdown, wait at least ____ hours before testing again to allow make-up to enter the system and dilute the feedwater.

134
Q

The chloride test uses _____ as the titrant.

A

silver nitrate

135
Q

Alkaline test procedure : Draw a ______ sample of boiler water to be tested.

A

150 milliliter (ml)

136
Q

Alkaline test procedure: Allow sample to cool to ___ degrees fahrenheit.

A

100 degrees F

137
Q

Alkaline test procedure: Remove protective cap from the tester and immerse _____ inches into the sample.

A

1 to 3.5 inches

MK1 EOCT AUXILIARY EQUIPMENT (8 decks)

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