Pressure & Atmosphere

Question 1

Formula for Force

Answer 1

F=Pressure x Area

Question 2

Pressure and force units

Answer 2

Psi-lb/in2 
Psf-lb/ft2
oz/in2, 
Pa, 
kPa

Question 3

Six principles of hydrostatic

Answer 3

• Fluid pressure exerted in all direction
• shape of the container does not affect Floyd pressure
• fluid pressure is proportional to depth
• fluid pressure is proportional to density
• horizontal runs do not increase pressure
• volume of fluid does not affect pressure

Question 4

Water one meter high exerts a pressure of

Answer 4

9.81 kPa

Question 5

Mercury one meter high exerts a pressure of

Answer 5

133. 416 kPa

9. 81 kPa (weight of 1m of H2O) x 13.6 (RD of mercury)

Question 6

Two factors that affect pressure

Answer 6

Height and density of the fluid

Question 7

What factor doesn’t affect pressure

Answer 7

Volume of fluid

Question 8

One cubic foot of water column exerts a force of 62.4 lb. divided by pressure of 144 in2 (inches in a foot) equals

Answer 8

0.433 psi lb/in2

Height in feet

Question 9

One in2 column of water weighs 0.0361 lb. How much does a 12” water column exert for pressure

Answer 9

0.433 psi

Question 10

one sq. in. weighs 0.0361 lb. times 16oz/lb equals

Answer 10

0.578 oz/in2

Height in inches

Question 11

INCHES OF MERCURY

RD of mercury is 13.6 times 0.0361 psi equals

Answer 11

0.491 lb/in2

Mercury

Question 12

1 sq meter base 1 meter high water column of water has the pressure of

Answer 12

9.81 kPa

Kilopascals

Question 13

Find the weight of one sq inch of water column

0.433 psi divided by 12 equals

Answer 13

0.0361 lb/in2