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Adv. > Pressure & Head > Flashcards

Pressure & Head Flashcards

1
Q

Measurement of height which is relative to pressure

A

Head

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2
Q

Formula to get PSI if height is given

A

Height x 0.433 = PSI

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3
Q

Formula to get height if PSI is given

A

PSI Divided by 0.433 = Height

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4
Q

PSI means

A

Pounds per square inch

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5
Q

1 cubic foot of water weighs

A

62.4Lbs

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6
Q

One many cubic inches in one cubic foot

A

1728

12x12x12

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7
Q

Weight of one cubic inch of water

A

0.0361

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8
Q

PA or KPA means

A

Pascals or Kilopascal’s

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9
Q

ATM means

A

Standard Atmosphere

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10
Q

What is the most common unit of measurement

A

Pascals (PA) and Kilopascal’s (KPA)

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11
Q

All industry gauges read

A

P.S.I.G

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12
Q

Absolute pressure is

A

Pressure measured above a perfect vacuum

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13
Q

What is atmospheric pressure

A

14.7 PSIA

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14
Q

Any liquid with a specific gravity of less then 1 will

A

Float

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15
Q

Any liquid having a specific gravity of more than 1 will

A

Sink

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16
Q

Antifreeze will ____ in water

A

Sink
(1.15sg)

17
Q

When you test antifreeze solutions with _____ you are determining the solutions specific gravity

A

Hydrometer

18
Q

Firefighting foam has a very ____ specific gravity

19
Q

Firefighting foam will

A

Float on flammable liquids and cut off oxygen supply

20
Q

To find the specific gravity if given weight

A

Weight of substance DIVIDE by weight of water in cubic foot or cubic inch

I.e 72.4lbs per cubic foot / 62.4 is 1.16 SG

0.042Lbs per cubic inch / 0.00361 is 1.16 SG

21
Q

To find the weight if given specific gravity

A

Specific gravity X weight of 1 cubic foot of water ( to get cubic inch, divide by 1728 after)

22
Q

Weight of one gallon of water

23
Q

What is water composed of

A

Hydrogen and oxygen

24
Q

Water exists in 3 states what are they

A

Liquid, solid, vapour

25
Q

How much does water expand when converted to steam

26
Q

What temperature is water most dense

27
Q

What temperature is water most dense

28
Q

Pressure is directly proportional to

A

The height of water column

29
Q

The greatest pressure is always found at the _____ of the riser

30
Q

Gravity tank will provide adequate pressure as long as it is how far above the riser

31
Q

Pressure tanks must be built in accordance to

A

American society of mechanical engineers

32
Q

Carbon dioxide systems utilize

A

Gas pressure for fire protection purpose

33
Q

High pressure CO2 Systems the cylinder is filled

A

60-68% of its capacity with liquid carbon dioxide

34
Q

At room temperature (70F) the pressure is ___ in CO2 Cylinder

35
Q

CO2 cylinders should never be stored in excess of

36
Q

Rate of rise systems are measured in

A

Inches of fluid

37
Q

Most rate of rise systems are equipped with a pressure gauge

A

Rated in ounces per square inch

Adv. (8 decks)

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