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IT COVERS THESE SUBJECTS : A) FLUID PROPERTIES AND FLUID STATICS (HYDROSTATIC PRESSURE , FORCE ON SURFACE . B) KINEMATICS, PRESSURE VARIATION , BERNOULLI EQUATIONS . C) CONSERVATION OF VOLUME (CONTINUTY EQUATION). D) MOMENTUM ANALYSIS . E) ENERGY EQUATIONS. F) PIPE FLOW (SURFACE RESISTANCE, F...

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  • December 17, 2021
  • 32
  • 2021/2022
  • Exam (elaborations)
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IT COVERS THESE SUBJECTS :
A) FLUID PROPERTIES AND FLUID STATICS (HYDROSTATIC PRESSURE , FORCE ON SURFACE .

B) KINEMATICS, PRESSURE VARIATION , BERNOULLI EQUATIONS .

C) CONSERVATION OF VOLUME (CONTINUTY EQUATION).

D) MOMENTUM ANALYSIS .

E) ENERGE EQUATIONS .

F) PIPE FLOW (SURFACE RESISTANCE , FRICTIONAND LOCAL LOSSES , MOODY DIAGRAM .

G)OPEN CHANNEL FLOW.

H) DIMENSIONAL ANALYSIS AND SIMITUDE.



-(answers in the end )



+ Section I (Multiple-Choice Questions):



Q1) A cylindrical vessel 40 cm high is revolved about its vertcal axis so that the water
touches the botom when it just spills out. If the radius of the cylinder is √ 5 cm, the
angular velocity of rotaton, is :

A. 2 rad/sec

B. 3 rad/sec

C. 4 rad/sec

,D. 5 rad/sec

E. none of these.



Q2) A fuid is fowing over a plate where the velocity distributon is given by u= (2/3y
y^2 ) . take the dynamic viscosity of the fuid is (0.863) n.s/m^2 . Determine the shear
stresses at ,y=0.15 m



A. 2.2 N/M^2

B. 0.3167 N/M^2

C. 1.041 N/M^2

D. 0.773 N/M^2

C. 0.0951 N/M^2



Q3) The maximum vacuum created at the summit of a syphon is :



A. 2.7 m of water

B. 7.4 m of water

C. 5.5 m of water

D. 4.33 m of water

E. none.



Q4) An oil of 1.5mm thickness is used for lubricaton between a square plate (0.8m *
0.8m ) and an inlined plane , the angle of inclinaton is 30 ° . The weight of the plane is
300N , and it moves down with a uniform velocity of 0.3 m/s . Determine the dynamic

,vescosity of the oil ?




A. 9 (N.S/M^2)

B. 3.21 (N.S/M^2)

C.1.17 (N.S/M^2)

D. 2.962 (N.S/M^2)

C. 5.77 (N.S/M^2)



Q5) If the atmospheric pressure on the surface of an oil tank (S.G = 0.8) is 0.1 kg/cm2,
the pressure at a depth of 2.5 m, is

A. 2 meters of water

B. 3 meters of water

C. 4 meters of water

D. 6 meters of water



Q6) If the volume of a liquid weighing 3000 kg is 4 cubic metres, 0.75 is its :

A. specifc weight

B. specifc mass

C. specifc gravity

D.none of thes

, Q7) Compare the compressibillity of air (K= 1*10^5) , and water (2.2*10^9 ) at room
conditons and explain it :

A.15,000

B.20,000

C. 22,000

D. 19,000



Q8) when the pressure of a liquid is increased from (3.5 m.n/m^2) to (6.5 m.n/m^2) ,
its volume found to be decreased by 0.08 percent .

determine the bulk modules of elastcity of the liquid ?

A. 4.44 G.N/ M^2

B. 5.03 G.N/ M^2

C. 1.45 G.N/ M^2

D. 3.75 G.N/ M^2



Q9) Bernoulli's equaton assumes that



A. fuid is non viscous

B. fuid is homogeneous

C. fow is steady

D. fow is along the stream line

E. all the above.

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