Formula

Question 1

weight

Answer 1

mg = N
mass x gravity = Newton

Question 2

Density

Answer 2

M/V = kg/m³
Mass/Velocity

Question 3

Specific Volume

Answer 3

V/M = 1/p = m³/kg
Volume/Mass

Question 4

Specific Weight

Answer 4

W/V = KN/m³
Weight/Volume

Question 5

Specific Gravity (S. G)

Answer 5

Psub/Pstan = Ysub/Ystan

Question 6

Pwater

Answer 6

1000kg/m³

Question 7

Ywater

Answer 7

9.81KN/m³

Question 8

Dynamic Viscosity (Ud)

Answer 8

T/dv/dy
Shear stress/Velocity Gradient

Question 9

Kinematic Viscosity (Uk)

Answer 9

Ud/p
Dynamic Viscosity / Density

Question 10

absolute pressure (Pabs)

Answer 10

Patm + Pg = Patm - Pvac
Atmospheric pressure + gage Pressure = Atmospheric pressure - Pressure vacuum

Question 11

Atmosphere unit

Answer 11

0.101325Mpa
101.325kpa
101325pa
760mmhg
760torr
29.92inhg
14.7psi
10.33mH2O

Question 12

Hydrostatic Force (Fh)

Answer 12

Fh=gammahA

Question 13

eccentricity

Answer 13

Io/HA

Question 14

Continuity Equation
Volume flow rate = Q

Answer 14

Q=Av
area x velocity

Question 15

Continuity Equation for circular pipes (Q)

Answer 15

Q=(pi/4) d²v

Question 16

compressible and incompressible

Answer 16

pd²v=pd²v
d²v=d²v

Question 17

Reynolds Number (Re)

Answer 17

Re = vd/uk = pvd/ud

Question 18

Re for Non-circular pipe

Answer 18

Re = v(4Rh)/uk = pv(4Rh)/ud

Rh=Aflow/Pwetted

Question 19

Kinetic Energy and Velocity Head

Answer 19

KE= 1/2 ( mv²)
hv=v²/2g

Question 20

Elevation Energy and Elevation Head

Answer 20

PE=mgz
he=z

Question 21

Total Energy of Flow and Total head of flow

Answer 21

KE+PE+Ef
Hv+He+Hp

Question 22

Bernoulli’s Energy Theorem

Answer 22

V²/2g + P/gamma + Z = V²/2g + P/gamma + Z

Question 23

Energy Grade line

Answer 23

V²/2g + P/gamma + Z

Question 24

Hydraulic grade line

Answer 24

P/gamma + z

Question 25

Energy Equation with Pumps

Answer 25

V²/2g + P/gamma + z + Hpump = V²/2g + P/gamma + z + Hloss

Question 26

Energy Equation with Turbine

Answer 26

V²/2g + P/gamma + z = V²/2g + P/gamma + z + Hturbine + Hloss

Question 27

Major Head loss in pipes

Answer 27

Hloss=flv²/2dg coefficient of friction f=64/Re

Question 28

Minor Head loss in pipe

Answer 28

Hloss = khv = kv²/2g, k=coeff. of minor loss k = 0.5 (if not stated)