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Pipe Flow Hydraulics
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Pipe Flow Hydraulics
Pipe Flow Hydraulics
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1
Question
Answer
2
Question
Overall form loss
Answer
3
Question
Form loss coefficients for pipe outlet
Answer
4
Question
Form loss coefficients for pipe entrance
Answer
5
Question
Form loss coefficients for pipe junction
Answer
6
Question
Form-loss coefficient for abrupt transitions
Answer
7
Question
Equation for diameter for optimal expansions transition
Answer
8
Question
Form-loss coefficient for straight gradual expansion
Answer
9
Question
Form-loss coefficient for straight gradual contraction
Answer
10
Question
Head Loss in Transitions
Answer
11
Question
Form-loss coefficient for partly-closed rotary valve
Answer
12
Question
Form-loss coefficient for partly-closed sluice valve
Answer
13
Question
Form-loss coefficient for fully-open valves
Answer
14
Question
Form-loss coefficient for elbows
Answer
15
Question
Form-loss coefficient for pipe bend
Answer
16
Question
Friction Loss using Hazen-Williams Formula
Answer
17
Question
Friction Loss using Manning’s Formula
Answer
18
Question
Equation of f for turbulent flow (Re ≥ 4000):
Answer
19
Question
Kinematic viscosity by Swamee
Answer
20
Question
Reynolds Number Formula (2)
Answer
21
Question
Reynolds Number Formula (1)
Answer
22
Question
What is pipe flow used for in hydraulics?
Answer
It carries fluids with full cross-section flow, no free surface.
23
Question
What is the energy grade line (EGL) in pipe flow?
Answer
A line representing total head along the flow path (p/γ + αv^2/2g + z).
24
Question
What is the hydraulic grade line (HGL) in pipe flow?
Answer
A line representing the sum of pressure head and elevation head (p/γ + z).
25
Question
What are the two main components of head loss in pipes?
Answer
Friction loss and minor (form) loss due to fittings and transitions.
26
Question
What equation expresses friction loss using Darcy–Weisbach?
Answer
h_f = (8 f L Q^2)/(π^2 g D^5)
27
Question
What is Reynolds number a measure of?
Answer
Ratio of inertial to viscous forces in a fluid flow.
28
Question
For laminar flow (Re ≤ 2000), what is f according to Hagen–Poiseuille?
Answer
f = 64/Re
29
Question
Name one empirical equation for turbulent friction factor when Re ≥ 4000.
Answer
Colebrook equation or Swamee–Jain approximation.
30
Question
What does the Colebrook equation relate?
Answer
Friction factor f to relative roughness ε/D and Re.