KARABUK UNIVERSITY, ENGINEERING FACULTY, AUTOMOTIVE ENGINEERING,
FLUID MECHANICS, FINAL EXAM, 08.01.2013
Attention: Forbidden to use extra paper. You can use the blank space on the page. Everyone's questions and options are
different from others. Time is 45 minutes. The draft solutions on the page will not read. Only will looked the options. If you
think ther is a mistake in the questions, tick the last option and write answer. Then it will be evaluated in your benefit to.You
can use the back of page as a draft.I wish you success... Asist.Prof.Dr.İbrahim Çayıroğlu
1 ) As shown in the figure, There is a h=6,25 m depth of an aquarium and a quarter sphere connected on bottom it. Sphere
radius is r=2,08333 Find the force to sphere as Newton. Neglect the thickness of the quarter sphere. Width of perpendicular
to the paper is 4,16667
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©1247045,867 ©1316326,193 ©1385606,519 ©...............
2 ) As shown in the figure, h=75m high dam generate electricity. water turbine output speed 3,125 and flow rate 30 m3/s
2,5% energy loss is caused by pipes. J. This dam how many house need provide? Assume that the each house consumes
average 1000 W.
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©13622,634 ©...............
3 ) As shown in the figure a rocket goes into space with turns. There are the liquid fuel in rocket. Diameter of tank D=2,5 m.
The height of the full portion n=5 m. The height of the empty portion m=1 m dir. The rocet accelerates with 10 m/s2
acceleration for takeoff. What is the Maximum angular velocity of the rochet when to avoid any force to the top cover?
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4 ) Select these questions on the text... @ Circle of inertia is D^4/64 © True © False @ If there is vacuum in one place, there
is negative absolute pressure in there. © True © False @ The Water is haeavier about 1000 times than air © True © False @
The formula of the centrifugal force is F=mr(v/r^2) © True © False @ paraboloid is equal to half the volume of the cylinder
© True © False @ Hydrometer measures the density of water © True © False @ The cover that in water, the pressure force
acts on the center of gravity © True © False @ The buoyancy is calculated according to the volume of All of the object ©
True © False @ 1 Peta is 10e18 © True © False @ One inch is 2.54 mm. © True © False * Attention! Options of this
problem, ignore it.
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5 ) As shown in the figure,We want to pump water to the top of a h=25 m building. The head loss of the pipe is 0,04167 m
for 1 meter. Asked to be at least 2,5 bar pressure at the top of the building (to run household appliances). The pump
efficiency is 75 %. Network of city water pressure is 3,125 bar. Flow rate of water 0,01667 is required. Accordingly, what is
the power of electrik motor that we need to buy as kW?
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6 ) As shown in the figure, We want to drain a pool with siphon. Ambient temperature is 25 degrees and the vapor pressure
at this temperature is 0,25 bar. What is the depth of the water in the pool without cavitation occur? ie, the maksimum h=?
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SOLUTIONS
Question
Question
Question
Text Question
@ Circle of inertia is D^4/64 © True © False
@ If there is vacuum in one place, there is negative absolute pressure in there. © True © False
@ The Water is haeavier about 1000 times than air © True © False
@ The formula of the centrifugal force is F=mr(v/r^2) © True © False
@ paraboloid is equal to half the volume of the cylinder © True © False
@ Hydrometer measures the density of water © True © False
@ The cover that in water, the pressure force acts on the center of gravity © True © False
@ The buoyancy is calculated according to the volume of All of the object © True © False
" @ 1 Peta is 10e18 © True © False
@ One inch is 2.54 mm. © True © False
5. Question
Question