Fluid Mechanics Question Paper of 3rd Semester Civil(D) Download Previous Years Question Paper 1

S.B. Roll No. _____________

FLUID MECHANICS

3rd Exam/Civil/5140/May’07

Duration : 4 Hrs.

Section A

1.     Choose the correct one

a.     Which of the following is dimensionless

                                                             i.      Specific weight

                                                           ii.      Specific volume

                                                        iii.      Specific speed n

                                                        iv.      Specific gravity

2.     A pressure of 25 m of head of water is equal to

a.     25kN/m²

b.     245 kN/m²

c.      2500 kN/m²

d.     2.5 kN/m²

3.     The co-efficient of discharge (cd) in terms of Cu and Cc is

a.     Cd=

b.     Cd= Cv x Cd

c.      Cd=

d.     None of the above

4.     Darcy’s equation is used to find loss of head due to

a.     Sudden enlargement

b.     Sudden contraction

c.      Friction

d.     None of the above

5.     Due to which of the following phenomena, water hammer is caused

a.     Incompressibility of fluid

b.     Sudden opening of a value

c.      The material of the pipe being elastic

d.     Sudden closure of a value it

6.      State true or false

a.     Local atmospheric pressure is measured by hydrometer

b.     The inlet length of a venturimeter is less than the outlet length.

c.      Maximum velocity and discharge in a rectangular channel occurs when the depth is equal to the breadth.

d.     The velocity of flow of fluid possible at the center of the pipe section is maximum

e.      A foot value is used in case of a centrifugal pump.

7.     Fill in the blank

a.     The atmospheric pressure is _____  mm of mercury.

b.     Differential manometers measure _________ two points.

c.      Pitot tube is used for the measurement of _____

d.     If the level of water surface down stream is higher than that weir crest, the    weir is called ____________ weir.

e.      Reciprocating pumps are most commonly used when _______ discharge is required.

Section –B

8.       

a.     What is the difference between an ideal fluid and a real fluid.

b.     What do you mean by absolute pressure, gauge pressure and atmospheric pressure?

c.      What is a venturiemter? Derive an expression for discharge through a venturimeter?

d.      Explain various head losses in the flow though a pipeline.

                                                             i.      Steady and unsteady flow

                                                           ii.      Uniform and non-uniform flow in the case of open channels?

e.      Explain giving neat line diagram, the construction and working of a reciprocating pump. Why it is called a positive displacement pump?

f.       Why a mouthpiece is preferred to an orifice? Obtain an expression for time of emptying a tank through an orifice provided at its bottom.