Fluids and Instrumentation

Question 1

What is the pressure equation?

Answer 1

P= F/A

Question 2

How do Hydraulic Systems work?

Answer 2

Transfer pressure, usually uses oil which is nearly incompressible

Question 3

What will happen if container has two different surface areas?

Answer 3

Different force will be transmitted but pressure will remain the same
If A2>A1 then F2>F1
F1/A1 = F2/A2

Question 4

Equation for pressure of a water column

Answer 4

H x Density x g

Question 5

What is the opposing force to pressure on an object called?

Answer 5

Upthrust

Question 6

How to calculate Upthrust?

Answer 6

(H1-H2) x densitygA
or
mg

Question 7

What is used to represent the flow of fluid?

Answer 7

Flow Lines

Question 8

What are flow lines for laminar?

Answer 8

All parallel and are not mixing

Question 9

What are flow lines for turbulent flow?

Answer 9

All mixed and goes in multiple directions

Question 10

How to calculate the flow rate?

Answer 10

vA

Question 11

How to calculate Reynold’s Number?

Answer 11

vldensity/viscosity (no units)

Question 12

What is the definition of continuity?

Answer 12

A fluid must flow continuously through a pipe which means fluid mass entering must equal fluid mass exiting

Question 13

What is the equation for continuity?

Answer 13

density v A

Question 14

What happens if the area is narrower

Answer 14

v1A1 = v2A2

Question 15

What does Bernoulli’s equation link?

Answer 15

Two points of a streamline energy per unit volume that does not change

Question 16

What is viscosity?

Answer 16

A property of a fluid which determines how much internal friction it exhibits

Question 17

What is Poiseuille’s Equation?

Answer 17

Pir^4(P1-P2)/8ViscosityL

Question 18

What is Stoke’s Law?

Answer 18

When an object moves through a viscous fluid, the fluid exerts a drag force on the object
mg/6Pirv