Fluid Mechanics Question Paper of 3rd Semester Civil(D) Download Previous Years Question Paper 5

S.B. Roll No. _____________

FLUID MECHANICES

3rd Exam/Mech/5381/Dec’07

Duration : 4 Hrs.

Section A

1.     Fill in the blanks

a.     Loss of head due to velocity of water at outlet = _______

b.     Loss of head due to friction in pipes= ____________ when discharge in the pipe is known

c.      Pressure energy possessed by a liquid is by virtue of it __________

d.     The venturimeter is an apparatus, for finding the _________ of a liquid flowing in a pipe.

e.      A ________ is a device to increase the intensity of pressure of water, by means of energy available from a large quantity of water at a low pressure.

f.       Francis’ turbine is an inward flow __________  turbine with radial discharge.

g.     A reciprocating pump is suitable for ________ discharge and_________ heads.

h.     A pitor is used to determine the _________ of flow at the required points in a pipe or stream.

i.       A piezometer tube is the simplest form of manometer used for measuring _________

j.       A fluid having __________ viscosity is known as an ideal fluid.

Section –B

2.     Attempt any five questions.

a.     Explain the following

                                                             i.      Effect of temperature on viscosity

                                                           ii.      Kinematic viscosity

b.     Define total pressure on a surface and centre of pressure of a surface.

c.      Water is flowing through a pipe of 10 cm diameter with an average velocity of 5m/sec. Determine the velocity at the other end of the diameter of the pipe is gradually changed to 20cm. Also find discharge in litres per second.

d.     Differentiate between radial flow and axial flow turbines

e.      Why is reciprocating pump called a positive displacement pump?

f.       What are the various losses of head of a flowing water? Name any four of them.

Section –C

3.     Attempt any two questions.

a.      A venturimeter with a 15 cm diameter at inlet and 10 cm throat is laid with its axis horizontal and is used for measuring the flow of oil of sp. Gravity 0.9 the oil mercury differential manometer shows a gauge difference of  20cm. Assuming co-efficient of meter as 0.98 calculate the discharge in litres per minute.

b.     A simple manometer is used to measure the pressure of oil (sp. Gravity 0.8) flowing in a pipeline. Its right limb is open to atmosphere and the left limb is connected to the pipe. The centre of  pipe is 9 cm below the level of mercury in the right limb. If the  difference of mercury level in the two limbs is 15 cm. Find the gauge (in Newton/cm2) pressure take sp. Gravity of mercury=13.6.

c.        

                                                             i.      Explain with neat sketch a hydraulic accumulater.

                                                           ii.      Explain the working principle of reciprocating pump with neat sketches.