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Boiler operator licensing > Answer key > Flashcards

Answer key Flashcards

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
Q

The pressure reading valve in hot water heating system regulates the water pressure of water returning from heating units

A

False

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26
Q

A boiler is an open vessel in which water is transformed into steam under pressure by the application of heat

A

False

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27
Q

An HRT boiler is a watertube boiler

A

False

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28
Q

In a watertube boiler the_____pass through the tubes and the____passs across the outside surface of the tubes

A

Water

Combustion gases

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29
Q

The three most common fuels used in steam production are_____

A

Natural gas, fuel oil, and coal

30
Q

In a natural draft furnace the amount of draft, is effected by the heigh of the stack

A

True

31
Q

Fuel oil grades commonly used in boiler are designated by No._____for the lightes grade and No._____for the heaviest grade of fuel oil.

A

2 and 6 fuel oil

32
Q

A boiler has quick and slow opening blowdown valves, the sequence used for blowdown is______

A

Open quick valve, open slow valve

Close slow valve, close quick valve

33
Q

The most important boiler fitting in a boiler_____

A

Safety valve

34
Q

The valve with the least amount of restriction is the______

A

Gate

35
Q

Steam boiler safety valve must be sized to prevent steam pressure from exceeding the MAWP by_____%

A

6%

36
Q

Flame safeguard systems can monitor_____

A

Air temperature outside the building
Pilot and main flame
Feedwater pressure and temperature

37
Q

Sensors used for flame detection in boilers include______

A

Leed sulfide cell
Ultraviolet scanner
Thermocouple

38
Q

A_____blowdown is performed to remove sludge from the boiler

A

Bottom

39
Q

A PH level of 7.0 is an indication that the boiler water is_____

A

Basic but watertube corrosion problems are probably under control

40
Q

At sea level, atmospheric pressure is aproximately_____psi

A

14.7

41
Q

Specific gravity is the ratio of weight of a volume of a substance to the weight of the same volume of_____

A

Water

42
Q

Heat tranfer can occur by_____

A

Conduction
Convection
Radiation

43
Q

Water weights approximately_____lb/gal

A

8.3

44
Q

Boiler safety valves should be repaired by an_____

A

Authorized safety valve repair company

45
Q

MSDS should only be available to supervisors and managers.

A

False

46
Q

The EPA does not regulate discharges of waste water from utility and industrial boilers.

A

False

47
Q

Foaming of boiler water from floating foreign matter causes an increase in______

A

Surface tension

48
Q

Blowing down is most effective during a period when the steam output is_____

A

At a low rate

49
Q

The water column must be located_____

A

At the normal operating water level

50
Q

A boiler that is primming has_____

A

Water carried over with the steam

51
Q

If the low water alarm sounds_____

A

Secure the fire

52
Q

A feedwater pump can become steambound from_____

A

Feedwater temperature too high

53
Q

Infrared or ultraviolet rays are sensed by the_____

A

Flame scanner

54
Q

As the steam pressure increases in a boiler, there is a corresponding increase in the_____

A

Boiling temperature of the water in the boiler

55
Q

Complete combustion is______

A

Burning all the fuel with the propwr amound of excess air

56
Q

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

A

5 psi

57
Q

Draft in a boiler is measured in_____

A

Inches of water

58
Q

A positive pressure before the furnace indicates______draft

A

Forced

59
Q

Preparation for a boiler inspection requires having the boiler_____

A

Cool, opened, and thoroughly cleaned

60
Q

The firing rate of the burner is controlled by_____

A

Modulating pressure control

61
Q

A fan located between the breeching and the stack is a______

A

Induced draft fan

62
Q

Calss____fires are electrical fires, such a motor or transformer fire

A

C

63
Q

A main steam stop valve would most likely be an_____

A

Os&y gate valve

64
Q

The evaporation of 34.5 pounds of water per hour from and at 212’f is defined as______

A

One boiler horsepower

65
Q

A compound gauge is a pressure gauge that indicates______

A

Vacuum in inches of mercury or pressure in psi on the same gauge

66
Q

When burning no. 6 fuel oil, a____is required

A

Fuel oil heater

67
Q

A_____prevents the flow of boiler water back to the city water supply

A

Backflow preventer

68
Q

The amount of british thermal units (btu) per pound or gallon of fuel is the______

A

Heating value

69
Q

______is the acumulation of minerals such as calcium and magnesium on boiler heating surfaces

A

Scale

70
Q

Tubes in a firetube boiler are mounted into the_____located at the front anf rear of the boiler

A

Tube sheet

Boiler operator licensing (1 decks)

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