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Answer key Flashcards

(70 cards)

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1
Q

The number of blowdowns is determined by______

A

Feed water analysis

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2
Q

A_____pump is a boiler accessory that draws condensate back from the system by produsing a negative pressure

A

Vacuum pump

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3
Q

Oxygen in the water causes_____?

A

Pitting

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4
Q

A therm is equivalent to_____BTU

A

100,000

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5
Q

A_____draft fan is located before the furnace

A

Forced

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6
Q

Impurities that increase the surface tension of boiler water are remove with a_____blowdown

A

Surface

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7
Q

The primary function of the water column on a low pressure boiler is to______

A

Reduce water movement

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8
Q

The boiler vent is opened when_____

A

Adding feedwater chemicals and warming the boiler

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9
Q

A low water condition requires_____immediately

A

Securing fuel to the burner

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10
Q

CO in the flue gas is an indication of_____combustion

A

Incomplete

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11
Q

Oxigen is required for the combustion of fuel

A

True

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12
Q

A siphon is located between the boiler and steam pressure gauge to prevent water from entering the bourdon tube

A

False

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13
Q

At the NOWL the gauge glass is approximately half full

A

True

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14
Q

A low water condition in the boiler can cause overheating of the tubes

A

True

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15
Q

City water does not require treatment for use in a boiler

A

False

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16
Q

Steam traps prevent the flow of condensate back to the feedwater pump

A

False

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17
Q

Clogged fuel oil strainers cause high suction reading

A

True

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18
Q

Anthtacity coal is hard coal

A

True

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19
Q

Draft is measure with a manometer

A

True

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20
Q

Sludge is removed from the boiler with a surface blowdown

A

False

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21
Q

A deaerator is a boiler water treatment accessory that heats feedwater to the temperature of saturated steam withing the pressure vessel

A

True

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22
Q

All valves are close when completing a dry lay-up

A

True

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23
Q

The boiler room log is used to record boiler operation events

A

True

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24
Q

Forced circulation hot water heating systems are more common in large buildings than natural circulation hat water heating systems

A

True

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25
The pressure reading valve in hot water heating system regulates the water pressure of water returning from heating units
False
26
A boiler is an open vessel in which water is transformed into steam under pressure by the application of heat
False
27
An HRT boiler is a watertube boiler
False
28
In a watertube boiler the_____pass through the tubes and the____passs across the outside surface of the tubes
Water | Combustion gases
29
The three most common fuels used in steam production are_____
Natural gas, fuel oil, and coal
30
In a natural draft furnace the amount of draft, is effected by the heigh of the stack
True
31
Fuel oil grades commonly used in boiler are designated by No._____for the lightes grade and No._____for the heaviest grade of fuel oil.
2 and 6 fuel oil
32
A boiler has quick and slow opening blowdown valves, the sequence used for blowdown is______
Open quick valve, open slow valve | Close slow valve, close quick valve
33
The most important boiler fitting in a boiler_____
Safety valve
34
The valve with the least amount of restriction is the______
Gate
35
Steam boiler safety valve must be sized to prevent steam pressure from exceeding the MAWP by_____%
6%
36
Flame safeguard systems can monitor_____
Air temperature outside the building Pilot and main flame Feedwater pressure and temperature
37
Sensors used for flame detection in boilers include______
Leed sulfide cell Ultraviolet scanner Thermocouple
38
A_____blowdown is performed to remove sludge from the boiler
Bottom
39
A PH level of 7.0 is an indication that the boiler water is_____
Basic but watertube corrosion problems are probably under control
40
At sea level, atmospheric pressure is aproximately_____psi
14.7
41
Specific gravity is the ratio of weight of a volume of a substance to the weight of the same volume of_____
Water
42
Heat tranfer can occur by_____
Conduction Convection Radiation
43
Water weights approximately_____lb/gal
8.3
44
Boiler safety valves should be repaired by an_____
Authorized safety valve repair company
45
MSDS should only be available to supervisors and managers.
False
46
The EPA does not regulate discharges of waste water from utility and industrial boilers.
False
47
Foaming of boiler water from floating foreign matter causes an increase in______
Surface tension
48
Blowing down is most effective during a period when the steam output is_____
At a low rate
49
The water column must be located_____
At the normal operating water level
50
A boiler that is primming has_____
Water carried over with the steam
51
If the low water alarm sounds_____
Secure the fire
52
A feedwater pump can become steambound from_____
Feedwater temperature too high
53
Infrared or ultraviolet rays are sensed by the_____
Flame scanner
54
As the steam pressure increases in a boiler, there is a corresponding increase in the_____
Boiling temperature of the water in the boiler
55
Complete combustion is______
Burning all the fuel with the propwr amound of excess air
56
When testing a safety valve by hand on a low pressure steam boiler, the boiler must be be at a minimum pressure of____before the try lever can be lifted without damaging the valve
5 psi
57
Draft in a boiler is measured in_____
Inches of water
58
A positive pressure before the furnace indicates______draft
Forced
59
Preparation for a boiler inspection requires having the boiler_____
Cool, opened, and thoroughly cleaned
60
The firing rate of the burner is controlled by_____
Modulating pressure control
61
A fan located between the breeching and the stack is a______
Induced draft fan
62
Calss____fires are electrical fires, such a motor or transformer fire
C
63
A main steam stop valve would most likely be an_____
Os&y gate valve
64
The evaporation of 34.5 pounds of water per hour from and at 212'f is defined as______
One boiler horsepower
65
A compound gauge is a pressure gauge that indicates______
Vacuum in inches of mercury or pressure in psi on the same gauge
66
When burning no. 6 fuel oil, a____is required
Fuel oil heater
67
A_____prevents the flow of boiler water back to the city water supply
Backflow preventer
68
The amount of british thermal units (btu) per pound or gallon of fuel is the______
Heating value
69
______is the acumulation of minerals such as calcium and magnesium on boiler heating surfaces
Scale
70
Tubes in a firetube boiler are mounted into the_____located at the front anf rear of the boiler
Tube sheet

Boiler operator licensing (1 decks)

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