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ISRO ME 2019 Fluid Mechanics and Machinery 2

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Question 1

It the surface tension of water in contact with air is 0.075 N/m. what correction need to be applied to compensate capillary rise in the manometric reading in tube of 4 mm diameter ________.

Question 2

In a pipe flow,  water flows with a velocity as measured by pitot tube is 5m/s and stagnation head is 4m. The static pressure in kN/m2 is (Take g=10 m/s2)

Question 3

The Coefficient of discharge of a orifice meter is 0.97. The time take by fluid to cover 8 cm of distance is 0.5 sec. Also the area of orifice is 75 mm2. The Theoretical Discharge will be __________.

Question 4

Two solid blocks of same weight and of circular cross section of diameter D. One block is made up of a material (metal1) of density 800kg/m3 and another (metal2) of a density 700kg/m3. These two blocks are set to float on water surface. The ratio of heights of blocks of metal 1 to metal 2 is

Question 5

Consider fully developed flow in a circular pipe with negligible entrance length effects. Assuming the mass flow rate, density and friction factor to be constant, if the length of the pipe is doubled and the diameter is halved, the head loss due to friction will increase by a factor of

Question 6

In a turbulent flow through the pipe the mean velocity is 3m/sec and friction factor f = 0.03. The shear velocity of flow is …….m/sec.

Question 7

As per common design practice, the three types of hydraulic turbines, in descending order of flow rate, are

Question 8

If the velocity distribution in a laminar boundary can be assumed as the ratio of momentum thickness to the nominal thickness is given by:

Question 9

Oil with a vapour pressure of 20 kPa, is delivered through a pipeline by equally spaced pumps, each of which increases the oil pressure by 1.3 MPa. Friction losses in the pipe are 150 Pa per metre of pipe. What is the maximum possible pump spacing to avoid cavitation of the oil?

Question 10

For the configuration shown, the minimum head H in the vessel will be
[Take Cv=1]
Description: Description: E:\Gate\SSC JE Mechanical Part 1\Made Easy Questions\07_Fluid-Mechanics_BLok_files\image006.png
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Jul 7ESE & GATE ME