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Danica’s Steamfitter III Review > Pressure Vessels > Flashcards

Pressure Vessels Flashcards

1
Q

How can an HP boiler be used for LP heating application?

A

Reducing the pressure

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2
Q

What is another name for a flash tank?

A

Flash steam separator

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3
Q

What is the maximum working pressure for an LP boiler?

A

15 psi or 10 7 KPA

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4
Q

What temperature does ASME section one define HTHW to be?

A

121°C or 250°F

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5
Q

Where did temperatures for HTHW systems usually operate?

A

Between 171°C – 232°C or 350°F – 450°F

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6
Q

Fired pressure vessels obtain heat source in what form? Direct or indirect?

A

Direct

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7
Q

What pressure applies to HTHW boilers?

A

160 psi and over

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8
Q

What section of the ASME code applies to LTHW boilers?

A

ASME section VIII

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9
Q

What type of pressure vessel gets heat from an indirect source?

A

Unfired pressure vessel

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10
Q

What is the maximum diameter classification for category H fittings?

A

Less than 6 inches

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11
Q

What ASME codes cover the piping system on an HTHW boiler?

A

ASME B31.1 and B31.3

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12
Q

A hot water storage tank heated by steam has a maximum capacity of:
A. 450 L
B. 451 L
C. 400 L.

A

A. 450 L or 120 US gallons

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13
Q

HP boilers are designed for process only, true or false?

A

False

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14
Q

Where does flash steam get heat from?
A. High-pressure steam.
B. High-pressure condensate.
C. Low pressure condensate.
D. Pressure steam.

A

B. High-pressure condensate

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15
Q

What ASME section covers pressure vessels greater than 42.5 L?

A

ASME section VIII

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16
Q

A pressure relief valve is designed to relieve vapor. True or false?

A

False

17
Q

Vessels serving as a cushion tank with a capacity of 454 L or less, are not covered by ASME section I. True or false?

A

True

18
Q

What is a pressure relief device designed to do?
A. Open proportionately after operation.
B. Open Rapidly during operation.
C. Re-close after operation.

A

C. Reclose after operation.

19
Q

What is a rupture disc activated by?

A

Inlet static pressure

20
Q

All pressure vessels within the scope of a SME section VIII shall be provided with an over pressure protection? True or false

A

True

21
Q

Should a safety pop valve be located in the liquid space of the pressure vessel or the vapour space of the pressure vessel?

A

In the vapour space of the pressure vessel

22
Q

What must the minimum inlet size be when two or more pressure relieving devices are placed on one outlet of the pressure vessel?

A

Combined area of the inlets of the relief devices

Danica’s Steamfitter III Review (12 decks)

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