Jawaharlal Nehru Technological University Hyderabad

Jawaharlal Nehru Technological University Hyderabad B.Tech II MECHANICS OF SOLIDS AND MECHANICS OF FLUIDS Previous Question Paper (May/June - 2019 - R16)

B.Tech | II | II-I | R16 | May/June - 2019

Answer PaperPaper Code: 133BFMaximum Marks: 75Time: 3 Hours

Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.

PART - A

125 marks

Define Hook's law and mention its limitations.

2 marks

Answer

Hooke's Law states that within the elastic limit, the stress applied to a material is directly proportional to the strain produced. Its limitations are that it is only valid up to the limit of proportionality, and it does not apply to non-linear materials or materials subjected to stresses beyond their elastic limit.

List out the types of stresses and strains.

3 marks

Answer

The types of stresses include tensile stress, compressive stress, and shear stress. The corresponding types of strains are tensile strain, compressive strain, and shear strain.

Define beam and classify various types of beams.

2 marks

Answer

What is meant by point of contra flexure? Mention when it occurs.

3 marks

Answer

Define torsion.

2 marks

Answer

Explain about torsional moment of resistance.

3 marks

Answer

Classify the Fluids.

2 marks

Answer

Define Center of Pressure and explain.

3 marks

Answer

Explain Stream line and Path line.

2 marks

Answer

List out the types of flows.

3 marks

Answer

PART - B

210 marks

Draw the stress strain diagram of mild steel and explain in detail.

5 marks

Answer

List out different Elastic moduli and write the relationship between them.

5 marks

Answer

310 marks

Derive the expression for volumetric strain.

5 marks

Answer

Define Temperature stress and derive the equation.

5 marks

Answer

410 marks

List out the assumptions in theory of Simple Bending.

5 marks

Answer

A Cantilever beam of 8 M span on which three point load 10 N, 5 N & 15 N are acting at a distance of 2M, 4M and 6M from free end Draw the SFD and BMD.

5 marks

Answer

510 marks

Classify the Beams and Loads.

5 marks

Answer

A Simply supported beam of 8 M span on which two point load 10 N & 15 N are acting at a distance of 2M and 6M from left end draw the SFD and BMD.

5 marks

Answer

610 marks

Compare the weight of a solid shaft with that of a hollow one having same length to transmit a given power at a given speed, if the material used for the shafts is the same. Take the inside diameter of the hollow shaft as 0.6 times the outer diameter.

5 marks

Answer

A hollow shaft is to transmit 300 kW at 80 rpm. The internal diameter is 0.6 of the external diameter. The maximum torque is 40% more than the mean torque. If the shear stress is not to exceed 60 N/mm2, find the external and internal diameters of the shaft.

5 marks

Answer

710 marks

A hollow shaft with external and internal diameters of 120mm and 80 mm respectively is to be replaced by a solid shaft of the same weight. Find the torques transmitted by the shafts if the permissible shear stress is 100 MPa. If the solid shaft is replaced by a hollow shaft of 160 mm external diameter, what is the torque transmitted for the same weight of the shafts?

5 marks

Answer

List out the Assumptions made in the theory of pure torsion.

5 marks

Answer

810 marks

Classify the manometers, Explain in detail about U-tube differential manometers where are they used.

5 marks

Answer

Explain the Newton’s law of viscosity and derive the equation for Dynamic Viscosity.

5 marks

Answer

910 marks

Derive the Equation for center of pressure of vertical surface.

5 marks

Answer

Explain the Properties of a Fluid.

5 marks

Answer

1010 marks

Explain in detail about Reynolds’s Experiment and define laminar flow and turbulent flow.

5 marks

Answer

The water flows in a pipe line whose diameter which changes from 20 cm at one end ‘A’ to 50cm at another end ‘B’. Pressures at two ends are 78.5 kN/m2 and 58.9 kN/m2 respectively. The flow rate is 200 liters per second. End B is higher than end A by 3m. Determine the direction of flow.

5 marks

Answer

1110 marks

Derive the Bernoulli’s equation along streamline and state the assumptions and limitations while deriving it.

5 marks

Answer

Explain: i) steady and unsteady flow ii) Uniform and non uniform flow and derive the continuity equation in 3 dimensions for a steady incompressible flow.

5 marks

Jawaharlal Nehru Technological University Hyderabad B.Tech II MECHANICS OF SOLIDS AND MECHANICS OF FLUIDS Previous Question Paper (May/June - 2019 - R16)

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PART - B

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