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Resistance In Fluid Systems
Test Description: Principles of Technology Unit 4: Resistance Subunit 2: Fluid Systems
Instructions: Answer all questions to get your test result.
1) To calculate fluid resistance
A
multiply flow rate by pressure drop.
B
divide flow rate by pressure drop.
C
multiply pressure drop by flow rate.
D
divide pressure drop by flow rate.
2) Viscosity is the resistance of a fluid. When the temperature increases, liquids
A
flow more slowly.
B
become thinner.
C
become thicker.
D
have a higher viscosity.
3) When designing fluid systems, the efficiency of the system is increased when fluid flow is
A
laminar.
B
turbulent.
C
swirling and mixing.
D
not streamlined.
4) If you double the pressure of a fluid in a pipe, the flow rate will
A
be half as much.
B
increase then decrease.
C
double.
D
remain the same.
5) The roughness in a pipe causes
A
blockage.
B
turbulence.
C
rusting.
D
decreased resistance.
6) A pipe has a fluid resistance of 10 psi/gpm. If the pressure drop is 5 psi, what is the flow rate of the fluid?
A
10 psi * 5 gpm
B
5 gpm / 10 psi
C
10 psi / 5 gpm
D
5 gpm + 10 psi
7) What is the fluid resistance of a hose that has a flow rate of 10 gpm and a pressure drop of 30 psi?
A
30 psi / 10 gpm
B
30 psi * 10 gpm
C
10 gpm + 30 psi
D
10 gpm / 30 psi
8) If two identical pipes have the same diameter but different lengths, which has the greater fluid resistance?
A
the pipe with fewer bends.
B
the pipe with no scale build up
C
the longer pipe
D
the shorter pipe
9) Adding bends or turns to pipes causes the fluid resistance to
A
decrease.
B
remain the same.
C
increase.
D
drop to zero.
10) Which of the following is a correct english unit for fluid resistance?
A
psi/gpm
B
gpm/psi
C
(N/m2) / (m3/sec)
D
(m3/sec) / (N/m2
*select an answer for all questions
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