; 09,.J.I464 - Fluid Mechnnics Fall20 I 0/ 20 II • J \ / / _.......- Midterm Exam Question 1 (7.5 Points) \.._ / The sliding plate viscometer shown below is used to measure the viscosity of fluid. The top plate is moving to the right with a constant velocity of 10 mls in response to a force of 3 N. the bottom plate is stationary. What is the viscosity of the fluid? Assume a linear velocity distribution. V lo M/r t =] , / ) C) ) :: i iJ ,'\ 1.) - 5 \ 'l \. / Page 1 of5 Seating# 31 (' 2 ( --:} civilium-ju.com
\.._ / The sliding plate viscometer shown below is used to
measure the viscosity of fluid. The top plate is moving to the
right with a constant velocity of 10 mls in response to a force of
3 N. the bottom plate is stationary. What is the viscosity of the
fluid? Assume a linear velocity distribution.
V ~ lo M/r t =] ,
/ ~~Y ) C) ) :: i iJ ,'\ 1.)
-5
\
'l \.
/
Page 1 of5
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094146
Oil (S = 0.8)
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09-l1464 --Flu id Mechanics Fall 20 I 0/20 II
Question 3 (7.5 Points)
Name: -----------------------
An 90 inverted cone contains water as shown. The volume of the
water in the cone is given by \1 = (tr I 3)h 3 The original depth
of the water is_ l 0 em. A block with a volume of 200 ci1? and a
specific gravity of 0.6 is floated in the water. What will be the
change (in em) iri water surface height in the cone?
[ J \ , ~ vJ ..- t'h
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0')c.l 146--l- Fluid ~.- Jech nn i cs Fall::!OI0/2 01 1
Name:
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Question 4 (7.5 Points)
In the drainage of irrigated lands it is frequently desirable to
install automatic flap gates to prevent flood from backing up into
lateral drains from a river. Suppose a square flap gate, of side
.12_ = 1.5 ~ and weight 8 kN, is hinged 1 m above its center (a=
0.25 m), as shown in the figure below, and the face is sloped 4
from the vertical. To what depth will water rise behind gate before
it opens.
~ a
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0941464 - Fluid Mechnnics Fall20 l 0/2011 Name:
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Formulas and Tables: Pw 1000 kgju1;) = 1.94 slugs/ft::~ p
p --
RT '"'fw 9810 Njn13 = 62.4 Ibf/ft:3
!1 9.8lln/s~ = 32.2 ftjs 2 F r hA
1/cp - + 1.'1:.?; 'If , yA
Fs =r v D M=-r f1z
For water: a= 0.073N I m
r ~ '7 1.< .t = !!'_ " l 2 - bh3 l,..,- 36 ~a-ll --
