5 The total head in a flow is the sum of Piezometric head, velocity head and datum head Piezometric head and velocity head Piezometric head and pressure head on the fluid Piezometric head and datum head

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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pllllllllllllease solve question 5

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Question 1: Choose the correct letter, A, B, C or D. (22 Points)
2 Points each
A
1
2
In a fluid flow, point A is at a higher elevation
than point B. The head loss between these
points is H. The total heads at A and B are
HA and Ha respectively. The flow will take
place:
The flow is said to be steady when the:
For the acceleration equation, when the term
VdV/ds=2 m/s² that means the flow is:
In a horizontal flow of incompressible fluid
along a constant pipe section under steady
conditions, the pressure along flow direction
will:
The total head in a flow is the sum of
In a flow along a varying flow cross section,
as the area decreases:
For pitot-static tube shown below, the flow
velocity is equal to:
Water
8
In a 2 m long pipe the cross-sectional area
A=0.4 m². At a given instant a discharge of
0.48 m/s was flowing in the duct and it was
found to increase at a rate of 0.12 m³/s. The
local acceleration in m/s² is:
L = 0.5 m
From A to B if
HA + H₂=
На
Velocity at any
point of
observation
does not
change with
time
Steady
Remain
constant
Piezometric
head, velocity
head and
datum head
The slope of
EGL will
increase
0.6 m/s
2.1
1
Always from A
to B
Velocity does
not change in
magnitude at
any point in a
flowing fluid
10 The head extracted by a turbine having a flow of 1.2 m/s is equal to
120 m. If the efficiency of the turbine = 90% the output power
developed from the turbine in kW is:
B
Uniform
Piezometric
head and
velocity head
Increase
In a steady flow at a location in the flow, the velocity head is 6 m, the
pressure head is 4 m, and the potential head is 4 m. The height of EGL
at this location will be:
Water flows at a rate of 0.001 m/s through a pipe with diameter of 20
cm, estimate Reynolds number if the kinematic viscosity = 106 m²/s.
The slope of
EGL will
decrease
2.15 m/s
3.6
14
1569.6
3855
C
From B to A if
HA+HL=
На
Velocity does
not change
either in
magnitude or
in direction at
any point in a
flowing fluid
Unsteady
Decrease
Piezometric
head and
pressure head
The slope of
EGL will
remain
constant
1.11 m/s
12
0.3
1271.3
4233
D
None of
these
None of
these
Non-
uniform
Increase or
decrease
depending
on the fluid
10
Piezometric
head and
datum head
Insufficient
information
3.13 m/s
5244
1.5
8
1418.5 1723.4
6366
Transcribed Image Text:9 11 4 5 6 7 3 Question 1: Choose the correct letter, A, B, C or D. (22 Points) 2 Points each A 1 2 In a fluid flow, point A is at a higher elevation than point B. The head loss between these points is H. The total heads at A and B are HA and Ha respectively. The flow will take place: The flow is said to be steady when the: For the acceleration equation, when the term VdV/ds=2 m/s² that means the flow is: In a horizontal flow of incompressible fluid along a constant pipe section under steady conditions, the pressure along flow direction will: The total head in a flow is the sum of In a flow along a varying flow cross section, as the area decreases: For pitot-static tube shown below, the flow velocity is equal to: Water 8 In a 2 m long pipe the cross-sectional area A=0.4 m². At a given instant a discharge of 0.48 m/s was flowing in the duct and it was found to increase at a rate of 0.12 m³/s. The local acceleration in m/s² is: L = 0.5 m From A to B if HA + H₂= На Velocity at any point of observation does not change with time Steady Remain constant Piezometric head, velocity head and datum head The slope of EGL will increase 0.6 m/s 2.1 1 Always from A to B Velocity does not change in magnitude at any point in a flowing fluid 10 The head extracted by a turbine having a flow of 1.2 m/s is equal to 120 m. If the efficiency of the turbine = 90% the output power developed from the turbine in kW is: B Uniform Piezometric head and velocity head Increase In a steady flow at a location in the flow, the velocity head is 6 m, the pressure head is 4 m, and the potential head is 4 m. The height of EGL at this location will be: Water flows at a rate of 0.001 m/s through a pipe with diameter of 20 cm, estimate Reynolds number if the kinematic viscosity = 106 m²/s. The slope of EGL will decrease 2.15 m/s 3.6 14 1569.6 3855 C From B to A if HA+HL= На Velocity does not change either in magnitude or in direction at any point in a flowing fluid Unsteady Decrease Piezometric head and pressure head The slope of EGL will remain constant 1.11 m/s 12 0.3 1271.3 4233 D None of these None of these Non- uniform Increase or decrease depending on the fluid 10 Piezometric head and datum head Insufficient information 3.13 m/s 5244 1.5 8 1418.5 1723.4 6366
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