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2 Boiler Fittings > Quiz > Flashcards

Quiz Flashcards

1
Q

Boiler fittings are components directly attach to the boiler

A

True

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2
Q

Saftey valves on steam boilers are desugn to open slowly

A

False

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3
Q

The sefety valve should chatter to prevent damage to the disk

A

False

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4
Q

Safety valves are tested only by performing a try lever test

A

False

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5
Q

A safety valve try lever test is performed with the boiler at 15 psi or higher

A

False

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6
Q

The steam pressure gauge must be connected to the higher part of the steam side of the boiler

A

True

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7
Q

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

A

False

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8
Q

A slow gauge reads less pressure than is actually in the boiler

A

True

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9
Q

Live steam allowed to enter the bourdom tube of a steam pressure gauge will damage the gauge

A

True

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10
Q

The water column should be blown down once a shift

A

True

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11
Q

The water column is used to indicate the water level in the blowdown tank

A

False

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12
Q

With the boiler in ita NOWL the gauge glass is aproximately half full

A

True

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13
Q

The purpose of the water column is to slow down the turbulance of the boiler

A

True

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14
Q

In low pressure steam boilers, two methods of determining water level are try cocks and gauge glasses

A

True

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15
Q

Gauge glasses are calibrated in pounds per square inch

A

False

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16
Q

With the water at the NOWL, steam is discharge from the bottom try cock when it opened

A

False

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17
Q

With the water at the NOWL, the middle try cock discharges a mixture of water and steam when it opened

A

True

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18
Q

With water at the NOWL, water is dischage from the top try cock when opened

A

False

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19
Q

If the top line of the gauge glass is closed or clogged, the glass will fill with water

A

True

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20
Q

If the bottom line to the gauge glass is close or clogged, the glass will be empty

A

False

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21
Q

To ensure the lines to the gauge glass are clear, it is recomended that the gauge glass be blown down at least once a month

A

False

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22
Q

The bottom blowdown line must be conected to the highest part of the steam side of the boiler

A

False

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23
Q

A high surface tension on boiler water can lead to foaming

A

True

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24
Q

Surface impurities are remove from the boiler by using the bottom blowdown valves

A

False

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25
Q

Boilers equipped with a quick-opening valve and a slow-opening valve must have the quick-opening valve closest to the boiler

A

True

26
Q

Only watertube boilers have bottom blowdown valves

A

False

27
Q

A high water level in a boiler can lead to carryover

A

True

28
Q

When dumping a boiler there should be a maximum steam pressure in the boiler to force water from the boiler

A

False

29
Q

To correct a high water level condition, the operator must open the bottom blowdown valve

A

True

30
Q

Bottom blowdown valves are used when dumping the boiler

A

True

31
Q

A fusible plug is the last warning the operator has of a dangerous low water condition in the boiler

A

True

32
Q

The core of the fusible plug melts at approximately 450 F

A

True

33
Q

The boiler vent should be open when filling the boiler with water

A

True

34
Q

A burner should always start in high fire to ensure enough fuel for ignition

A

False

35
Q

The_____is the most importan valve on a boiler

A

Safety valve

36
Q

The MAWP on a low pressure boiler is ____psi

A

15 psi

37
Q

Total force on a safty valve is equel to _____

A

Area times pressure

38
Q

The ASME code states that boiler with over _____squere feet of heating surface must have two or more safty valves

A

500 square feet

39
Q

The area of a safety valve 4” in diameter is_____square inches

A

12.5664

40
Q

The only valve permitted between the safety valve and the boiler is?

A

None. No valve is permitted

41
Q

The range of the pressure gauge should be____times the MAWP of the boiler

A

1 1/2 to 2

42
Q

In some states_____safety valves are permitted on steam boiler

A

Spring-loaded pop-off

43
Q

The total force on a safety valve 2 1/2” in diameter with a steam pressure of 15 psi is_____

A

73.63125

44
Q

The steam pressure gauge on the boiler is calibrated to read_____

A

Pounds per square inch

45
Q

Steam is prevented from entering the bourdon tube of the pressure by a

A

Siphon

46
Q

A_____pressure gauge can read either vacuum or pressure

A

Compound

47
Q

Vacuum is pressure_____pressure

A

Below atmospheric

48
Q

Safety valves are designed to popopen and stay open untel there is_____psi drop in pressure

A

2 to 4

49
Q

The water column is located at the NOWL of a low pressure steam boiler, so the lowest visible part of the gauge glass is_____above the highest heating surface

A

One inch

50
Q

Blowback is the_____in the boiler after the safety valve has opened

A

Drop in pressure

51
Q

Impurities that build up on the surface of the water in the boiler prevents_____from breaking though the surface of the water

A

Steam

52
Q

To prevent a vacuum from forming when taking the boiler off-line, the____must be open when pressure is still on the boiler

A

Boiler vent

53
Q

The operating range of the boiler is control by the______

A

Pressure control

54
Q

The______regulates the high and low fire of the boiler

A

Modulating pressure control

55
Q

The best time to blow down a boiler to remove sludge and sediment is when the boiler is under a____load

A

Light

56
Q

According to the ASME code, a try lever test on safety valves should be performed every_____ the boiler is in operation

A

30 days

57
Q

The capacity of a safety valve is measured by the amount of steam that can be discharged per_____

A

Hour

58
Q

The safety calve on a low pressure boiler is designed to open when pressure in the boiler exceeds____

A

The safety valve setting

59
Q

After the total force of the steam has lifted the safety valve off its seat, steam enters the______

A

Huddling chamber

60
Q

_______causes false water level readings in the gauge glass

A

Foaming

61
Q

On an additive pressure control,_____pressure plus_____pressure equels_____pressure

A

Cut-in, differential, cut-out

2 Boiler Fittings (2 decks)

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