Modular In BQ, HF, NC, 2phase

Question 1

A special case of the general energy equation that is probably the most widely used tool for solving

Answer 1

Bernoulli’s Equation

Question 2

It provides an easy way to relate the elevation head, velocity head, pressure head

Answer 2

Bernoulli’s equation

Question 3

It is possible to modify bernoulli’s equation in a manner that accounts for ____ and _____

Answer 3

Headloss and Pumpwork/pumphead

Question 4

Bernoulli’s Equation results from the application of the general energy equatin and first law of thermodynamics to a steady flow system in which:

Answer 4

No work is done on or by the fluid
No heat transfered from or to the fluid
No change occurs in the internal energy ( ex change in temperature change) of the fluid

Question 5

Used by engineers in reference to pressure. It is reference to the height, typically in feet, of a column of water that a given pressure will support.

Answer 5

Head

Question 6

Thus, bernoulli’s equation states that the total head of the fluid is ___

Answer 6

Constant

Question 7

Restrictions on the simplified Bernoulli’s Equation

Answer 7

No fluid friction ( head losses )
No work on or by the fluid ( pump work or pump head)

Question 8

___ due to friction (Hf) represents the energy used in overcoming friction caused by the walls of the pipe

Answer 8

Head Loss

Question 9

Is a flow measuring device that consists of a gradual construction followed by a gradual expansion

Answer 9

Venturi

Question 10

T or F. The flow velocity at the throat of the venturi and the volumetric flow rate are directly proportional to the square root of the differential pressure.

Answer 10

True

Question 11

1. Correction Factor to solve the actual velocity and actual volumetric flow rate
2. Account for friction losses and equals 0.98 for most venturi’s

Answer 11

Venturi factor

Question 12

Fluid situations must applied Bernoulli’s Equaiton:

Answer 12

1. Incompresible, steady flow with no internal friction
2. Incompresible flow with internal friction

Question 13

Measure of the reduction in the total head ( sum of elevation head, velocity head and pressure head ) of the fluid as it moves through a fluid system

Answer 13

Head Loss

Question 14

T or F. Head loss is unavoidable in ideal fluids

Answer 14

F, Beacuse head loss is unavoidable in real fluids

Question 15

Caused whenever the flow is directed or affected in any way by such components as piping entrances and exits, pumps, valves, flow reducers and fittings.

Answer 15

Turbulence

Question 16

Part of the total head loss that occurs as the fluid flows through straight pipes

Answer 16

Friction Loss

Question 17

The friction factor has been determined to depend on the _________ for the flow and the degree of roughness of the pipe’s inner surface

Answer 17

Friciton Factor

Question 18

The quantity used to measure the roughness of the pipe

Answer 18

Relative Roughness

Question 19

The average height of irregulararities (€) divided by the pipe diameter

Answer 19

Relative roughness = €/D

Question 20

The frictional head loss can be calculated using mathematical relationship that is known as _____. The equation using teo distinct forms.

Answer 20

Darcy’s Equation

Question 21

The first form of Darcy’s Equation determins the losses in the system _______.

Answer 21

Associated with the lenght of the pipe

Question 22

The losses thar occur in pipelines due to bends, elbows, joints, valves, etc are sometimes called ____

Answer 22

Minor Losses

Question 23

Darcy’s Equation ( 2nd Form )

Answer 23

Minor Losses

Question 24

True or False. For all minor losses in turbulent flow, the head loss varies as the square of the velocity

Answer 24

True

Question 25

Minor Losses may be expressed in terms of the ________ (Leq) of the pipe would have the same head loss fornthe same discharge flow rate

Answer 25

Equivalent Lenght

Question 26

T or F. By adding the equivalent lenghts of all components to the actual lenght of pipe in a system we can obtain the Leq value for the entire piping system

Answer 26

T