Pressure & Head

Question 1

Measurement of height which is relative to pressure

Answer 1

Head

Question 2

Formula to get PSI if height is given

Answer 2

Height x 0.433 = PSI

Question 3

Formula to get height if PSI is given

Answer 3

PSI Divided by 0.433 = Height

Question 4

PSI means

Answer 4

Pounds per square inch

Question 5

1 cubic foot of water weighs

Answer 5

62.4Lbs

Question 6

One many cubic inches in one cubic foot

Answer 6

1728

12x12x12

Question 7

Weight of one cubic inch of water

Answer 7

0.0361

Question 8

PA or KPA means

Answer 8

Pascals or Kilopascal’s

Question 9

ATM means

Answer 9

Standard Atmosphere

Question 10

What is the most common unit of measurement

Answer 10

Pascals (PA) and Kilopascal’s (KPA)

Question 11

All industry gauges read

Answer 11

P.S.I.G

Question 12

Absolute pressure is

Answer 12

Pressure measured above a perfect vacuum

Question 13

What is atmospheric pressure

Answer 13

14.7 PSIA

Question 14

Any liquid with a specific gravity of less then 1 will

Answer 14

Float

Question 15

Any liquid having a specific gravity of more than 1 will

Answer 15

Sink

Question 16

Antifreeze will ____ in water

Answer 16

Sink
(1.15sg)

Question 17

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

Answer 17

Hydrometer

Question 18

Firefighting foam has a very ____ specific gravity

Answer 18

Low

Question 19

Firefighting foam will

Answer 19

Float on flammable liquids and cut off oxygen supply

Question 20

To find the specific gravity if given weight

Answer 20

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

Question 21

To find the weight if given specific gravity

Answer 21

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

Question 22

Weight of one gallon of water

Answer 22

10lbs

Question 23

What is water composed of

Answer 23

Hydrogen and oxygen

Question 24

Water exists in 3 states what are they

Answer 24

Liquid, solid, vapour

Question 25

How much does water expand when converted to steam

Answer 25

1700x

Question 26

What temperature is water most dense

Answer 26

4C or 40F

Question 27

What temperature is water most dense

Answer 27

4C or 40F

Question 28

Pressure is directly proportional to

Answer 28

The height of water column

Question 29

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

Answer 29

Base

Question 30

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

Answer 30

35 feet

Question 31

Pressure tanks must be built in accordance to

Answer 31

American society of mechanical engineers

Question 32

Carbon dioxide systems utilize

Answer 32

Gas pressure for fire protection purpose

Question 33

High pressure CO2 Systems the cylinder is filled

Answer 33

60-68% of its capacity with liquid carbon dioxide

Question 34

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

Answer 34

850psi

Question 35

CO2 cylinders should never be stored in excess of

Answer 35

130F

Question 36

Rate of rise systems are measured in

Answer 36

Inches of fluid

Question 37

Most rate of rise systems are equipped with a pressure gauge

Answer 37

Rated in ounces per square inch