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Boiler License > Deck 1 > Flashcards

Deck 1 Flashcards

1
Q

What is the recommended time for a complete external inspection of a boiler?

A

Once per shift

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2
Q

During a 24-hour operation how often should you check the water level?

A

Once per shift

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3
Q

The vertical distance from the center line of the pump to top level of the supply tank is called?

A

Static suction head

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4
Q

____ is the difference in pressure between two points of measurement

A

Draft

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5
Q

What do you do to attain complete combustion in a boiler?

A

Increase secondary air

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6
Q

What do you call the chemicals that are used to test water treatment for hardness?

A

Reagents

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7
Q

Combustion efficiency can be increased when air is _____

A

Preheated

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8
Q

Air leaking into the inner and outer of the boiler, what will happen?

A

Decrease boiler efficiency

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9
Q

The _____ is where the liquid refrigerant turns to gas and absorbs latent heat?

A

Evaporator

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10
Q

Sensible heat is ______

A

Heat that can be measured with a thermometer

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11
Q

What chemical compounds in water cause permanent hardness?

A

Calcium Sulfate and Magnesium Silicate

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12
Q

Which chemicals are used to combat scale?

A

Combined Phosphate Treatment

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13
Q

Boiler waterwalls should be blown down ____?

A

When the firebox is cool but the boiler still has pressure

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14
Q

Area = ?

A

Length x Width

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15
Q

High pressure boilers equipped with quick opening and screw type valves are blown down how?

A

By opening the quick opening valve first, and closing it last

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16
Q

On/off controls that activate devices using a one variable (i.e. pressure) are called?

A

Discrete controls

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17
Q

Voltage = ?

A

Current x Resistance

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18
Q

With hydroxide present and normal oxygen levels, which chemical will cause problems?

A

Chlorine

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19
Q

The chief heat producing elements in fuel contents are?

A

Carbon & Hydrogen

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20
Q

What are the 4 steps for a zeolite rejuvenations process?

A

Backwash, brine, rinse, service

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21
Q

The color for an R-134A refrigerant cylinder is _____?

A

Light blue

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22
Q

What controls the steam pressure and monitors the combustion air intake?

A

Fuel, air, water

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23
Q

What is the acceptable range for residual sodium sulfite in the boiler?

A

30-70

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24
Q

A steam pressure gauge must have a range of at least _____ ?

A

1-1/2 time the working pressure of the boiler

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25
Q

How many BTU does it take to raise 10 lbs of steam from 40° to 41°

A

1 BTU

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26
Q

How many things do safety controls protect against?

A

A. Overpressure
B. Overheating
C. Fireside explosions

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27
Q

The oil in a refrigeration system is used for _____

A

Cooling and lubrication

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28
Q

In the design of a water tube boiler the ____

A

Gases of combustion pass over the tubes and the water circulates through the tubes

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29
Q

What is the movement of an object by a constant force to a specific distance?

A

Work

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30
Q

Energy is _____?

A

The ability to do work

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31
Q

What is the BTU content of a gallon of #4?

A

146,000

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32
Q

In a HVAC system, controlled by thermostat, the difference is difference between?

A

Setpoint and the temperature at which the switch turns the system off

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33
Q

The component in which liquid vapor is absorbing heat is called?

A

Evaporator

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34
Q

Why is platinum used in RTD (resistive temperature device)?

A

Because of its high stability at high temperature

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35
Q

What must be submitted to the code official when field assembly of boilers is required?

A

Boiler inspection report

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36
Q

When conducting and evaporation test, the operator must secure what?

A

The feed water to the boiler

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37
Q

Which condition is a boiler not protected against?

A

Under pressure

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38
Q

With normal oxygen and low alkalinity, what is added to the boiler water?

A

Neutralizing Amines

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39
Q

Force = ?

A

Pressure/Area

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40
Q

What is hard forming scale?

A

Silica

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41
Q

Define Firetube Boiler

A

A boiler in which heat and gases of combustion pass through tubes surrounded by water

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42
Q

Every discharge pipe on a safety valve should be at least?

A

6 feet high

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43
Q

What would you add to a boiler, if you are needed to protect the refractory from excess heat and to increase the capacity of the boiler?

A

Riser tubes

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44
Q

What is the normal sodium sulfite level in a boiler?

A

20-40

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45
Q

Plume discharges from the cooling tower shall not less than?

A

5 feet

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45
Q

Before using soot blowers on a boiler ____

A

Drain the sootblower lines

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45
Q

Which valves to the boiler is opened ____ and _____ during blow down?

A

By opening the quick opening valve FIRST and closing it LAST

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46
Q

Data printed on the equipment nameplate would include manufacturer, model & serial number and _____

A

Stamp of approval from commissioning authority 1 BTU

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46
Q

If the firing rate increases on a boiler equipped with a convection type superheater, the super temperature will _____.

A

Increase

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47
Q

Select the best electrical grounding method?

A

Metal stake driven 8 ft into the ground

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48
Q

When should the flow control be blown down?

A

Once per shift

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49
Q

The part of the refrigeration system that absorbs heat into the system is controlled by the ____?

A

Evaporator

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50
Q

Boilers should be warmed up slowly when starting to _____ ?

A

Allow uniform expansion of drums and tubes

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51
Q

Downcomers are found _____?

A

In a watertube boiler

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52
Q

You have boiler water that is found to have a pH of 5. What compound do have add to neutralize?

A

Bases

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53
Q

A steam pressure gauge is protected against excessive temperature by _____?

A

Siphon

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54
Q

What steam trap has one movable device that rises to allow steam through and resets on condensate?

A

Float trap

55
Q

A valve that requires five 360° turns of the hand wheel to change from fully opened to fully closed is ______?

A

Slow-Opening

56
Q

What is the economizer on a boiler used for?

A

It is used to add heat to feedwater

57
Q

Where is the cooling tower bleed line?

A

Drain line

58
Q

Work = ??

A

Force/Distance

59
Q

What type of valve would you use to control blow down?

A

Slow opening

60
Q

Controls which use a quantity measured over a range of dynamic values are?

A

Analog

61
Q

A proximate analysis of coal will not report what?

A

Percentage of various chemical elements

62
Q

Discrete control when used to steam pressure is what type of control?

A

on/off, stop/go

63
Q

An accumulation test is used to determine _____ ?

A

Safety valve capacity

64
Q

_____ is carrying over of particles of water with the steam.

A

Priming

65
Q

Celsius = ?

A

Fahrenheit - 32/1.8

66
Q

Define watertube boiler

A

A boiler in which water passes through tubes surrounded by gases of combustion.

67
Q

Fahrenheit = ??

A

(1.8 x Celsius) + 32

68
Q

A stoker that uses a feed RAM is a ?

A

Underfeed stoker

69
Q

An air handler unit that supplies a constant supply air temperature of 55° to building spaces and includes a coil is called a _______ air handler unit

A

Terminal reheat

70
Q

Resistance = ?

A

Voltage/Current

71
Q

Pressure = ?

A

Force/Area

72
Q

An air handler unit that provides heating, cooling, ventilation, and air conditioning to more than one building or area and has its cooling & heating coil in separate side-by-side ducts is called a _____ air handler unit?

A

Multizone

73
Q

Bituminous coal has a _____ content?

A

High Volatile

74
Q

Which element does not take an actual action in the combustion process?

A

Nitrogen

75
Q

What stays are used to support the burner chamber in a scotch marine boiler?

A

Diagonal Stays

76
Q

How are fire tubes in a boiler secured?

A

To the tube sheet

77
Q

What kind of steam trap has a simple float/disc that lifts?

A

Inverted bucket

78
Q

Which is the cause of high excess in a condensate return tank with temperature up to 20° above normal?

A

Steam traps are stuck open

79
Q

A condensate tank has a lot of steam existing from its vent it is registering 20° F higher than normal. What could be the reason?

A

Steam trap failing open

80
Q

What is pump slip?

A

The difference between the pumps theoretical and actual pump displacement.

81
Q

Where do you get the sub-cooling reading?

A

A. Get the liquid line PSI and convert to temp
B. Get the liquid line temp
C. (Liquid line PSI temp) - (Liquid line temp) = Sub Cool

82
Q

On boilers that have both quick opening and screw type blow down valves, the quick opening must be located?

A

Closest to the boiler and followed by the screw type valves

83
Q

In an open type expansion tank how high should the tank be mounted?

A

At least 4 feet above the highest heating element

84
Q

The color for an R-410a refrigerant cylinder is _____?

A

Rose

85
Q

Who can make adjustments or repairs on a safety valve?

A

Qualified person from manufacturer or representative

86
Q

A chief engineer preparing for mud drum inspection, which of the following will you not do?

A

Set up a 110 volt lighting for inspection

87
Q

What is the replacement refrigerant for R-22?

A

R-410a

88
Q

What is the area of a circle?

A

0.7854

89
Q

What is the pressure in PSI at the base of a column of water 250’ high and 8’ wide?

A

108
1’ water = 0.433 PSI
therefore
0.433 x 250 = 108

90
Q

Boilers shall be designed and constructed in accordance with?

A

ASME CSD-1

91
Q

Pyrometers can measure?

A

Temperature

92
Q

What is the heart of the refrigeration system?

A

Compressor

93
Q

What is the primary purpose of a crank case heater on a reciprocating chiller?

A

To prevent refrigeration migration

94
Q

What jumper is used to connect the neutral and ground?

A

Main bonding jumper

95
Q

What mechanical device is used to remove scale from fire tubes?

A

A tube rattler or vibrator is used

96
Q

Where is the high temperature liquid found?

A

At the discharge of the compressor or condenser

97
Q

Which compound does not produce heat?

A

Nitrogen

98
Q

Sewer lines are protected from the _____ when blowing down a boiler

A

Blowdown tank

99
Q

At 0 PSI, _____ BTU are necessary to change 1 lb of water at 212 F° into steam?

A

970.3

100
Q

In a multi-zone air handler unit, the zone thermostat controls the zones temperature by?

A

Dampers that control the air flow from the hot & cold deck.

101
Q

In a dual duct air handling system, space thermostatic control building temperature by?

A

Moving the air from the hot & cold duct in a molding box serving the space

102
Q

In a multi-zone air handling unit, the zone thermostat controls the zone temperature by?

A

Dampers that control the air flow from the hot & cold deck

103
Q

In a duct air handling system, space thermostat controls the building temperature by?

A

Mixing the air from the hot & cold duct in a mixing box serving the space

104
Q

When taking a boiler offline, a vacuum is prevented by _____?

A

Opening the air cock

105
Q

Latent Heat is _____?

A

(Hidden Heat) Heat added to a substance that changes its state without a change of temperature

106
Q

Viscosity of fuel oil is a _____

A

Measure of internal resistance to flow

107
Q

Sensible Heat is _____?

A

Heat that changes the substance, but not it’s state

108
Q

Extra-heavy steel pipe is required on a boiler bottom blowdown line when the pressure is above ______ psi?

A

125 psi

109
Q

What is the minimum size of a water column blowdown valve?

A

3/4”

110
Q

What produces soft scale?

A

Calcium Carbonate & Magnesium Carbonate

111
Q

A 3 element feed regulator senses what to control water flow?

A

Water level, steam flow, water flow

112
Q

The purpose of the condenser in a refrigerant system is to…

A

Change the refrigerant vapor to liquid state

113
Q

An air handler unit that has hot & cold ducts connected to (molding boxes) located in each building space is called?

A

Dual Duct

114
Q

How is a hydrostatic test performed?

A

Fill the boiler with 70° F water and raise the pressure to 1.5 MAWP

115
Q

The feedwater stop valve is found between the _____

A

Boiler and check valve

116
Q

A boiler has 2800 furnaces temperature and 600 stack temperature reading. What is the boiler efficiency?

A

78.57
Input-loss / input x 100
2800 - 600 x100 =78.57

117
Q

What is the maximum range of pressure settings of all the saturated steam safety valves on boilers?

A

10% of the highest set valve

118
Q

The furnace of an HRT (Horizontal Return Tubular) Boiler is _____

A

Outside of the boiler shell

119
Q

Waterwall should be blown down _____?

A

When the furnace is cool

120
Q

What does zeolite water softeners system use as a means of regeneration?

A

Brine

121
Q

A scotch marine boiler has _____

A

An internal furnace (firetube boiler)

122
Q

Where do you find the superheat reading?

A

A. Get the suction line PSI and convert to temp
B. Get evaporator temp
C. Suction temp - evaporator temp = superheat

123
Q

Which of the following types of pump can be started with the discharge valve closed?

A

Centrifugal

124
Q

The height in feet of a liquid above a point such as pump suction is?

A

Static head

125
Q

Which coal has the biggest level of fixed carbon content

A

Anthracite = 14,000

126
Q

What do you call a reading from the center point of an impeller across to the gauge?

A

Static pressure

127
Q

The heart of the refrigeration system is the ____?

A

Compressor

128
Q

The _____ removes moisture from a refrigeration system

A

Filter drier

129
Q

Name the wire that connects all components of a system to a physical ground or water pipe?

A

Grounding electrode conductor

130
Q

Refrigerant flow into the evaporator is controlled by _____?

A

A metering device

131
Q

The expansion tank on a closed loop system should be located, where?

A

On the suction side of the pump

132
Q

What does the whistle on the top of the water column indicating?

A

High/Low water condition

133
Q

How often should you check the low water fuel cut-off?

A

Once per shift

134
Q

Why is oil added to the refrigerant?

A

To lubricate the compressor and keep the refrigerant migrating

135
Q

When working on a boiler, permits would be required _____

A

For every shift

136
Q

Which of the following is a positive displacement pump?

A

Reciprocating

137
Q

Stay bolts are most commonly found on _____?

A

Firetube boilers

138
Q

______ boilers can operate at higher pressures than fire tube boilers?

A

Watertube

139
Q
A

Boiler License (1 decks)

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