PTU B.Tech Civil 3rd Semester May 2019 56072 FLUID MECHANICS I Question Papers

Roll No.

Total No. of Pages : 02

Total No. of Questions : 09

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B.Tech.(CE) (2011 Onwards) (Sem.-3)

FLUID MECHANICS-I

Subject Code : BTCE-301

M.Code : 56072

Time: 3 Hrs.

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Max. Marks : 60

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

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SECTION-A

Q1 Answer briefly :

1. Describe in brief compressibility and viscosity.
2. Describe the different sub groups of non-Newtonian fluid, giving example of each.
3. Explain Pascal's Law.

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4. Differentiate between Free and Forced Vortex motion.
5. Write Euler's Equation.
6. What is Metacentric Height?
7. Derive the equation of stream function.
8. Derive the equation for actual discharge in an orifice meter.

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9. What do you understand by Kinematic Similarity?
10. How the discharge in a venturimeter will change if its orientation changes.

SECTION-B

Q2 Explain the three conditions of equilibrium developed when a floating body is given a slight angular displacement.

Q3 How can you describe the flow patterns and give the individual description of each pattern.

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Q4 Derive the equation of stream function and velocity potential for a uniform stream of velocity v in a two dimensional field, the velocity v being inclined to the x-axis at a positive angle a.

Q5 Derive Borda - Carnot equation of head loss.

Q6 Derive an expression for ‘Total Pressure' and ‘Position of Centre of Pressure' for an inclined plane surface immersed in liquid

SECTION-C

Q7 A rectangular plate 1 m wide and 1.5 m deep is held vertically in water so that its upper horizontal edge is 1.25 m below the free surface. Find the total water pressure on one face of the plate and depth of centre of pressure.

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Q8 A pitot tube is mounted on an airplane to indicate the relative speed of the plane. What differential pressure intensity will the instrument register when the plane is travelling at a speed of 200 km/hr in a wind blowing at 60 km/hr. against the direction of motion of the plane? Take sp. wt. of air as 11.9 N/m². Assume Cv = 0.98.

Q9 Petrol of sp.gr 0.8 flows upward through a vertical pipe. A & B are two Points in the pipe, B being 0.3 m higher than A. Connections are led from A&B to a U-Tube containing mercury. If differential pressure is 0.18 kg/cm², find the reading of the manometer.

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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