PTU B.Tech Aerospace Engineering 3rd Semester May 2019 70903 FLUID MECHANICS and MACHINERY Question Papers

Roll No.

Total No. of Pages : 02

Total No. of Questions : 09

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(Sem.-3)

B.Tech. (Aerospace Engineering) (2012 Onwards)

FLUID MECHANICS & MACHINERY

Subject Code : ASPE-201

M.Code: 70903

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Time: 3 Hrs. Max. Marks : 60

INSTRUCTIONS 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

1. Attempt the following :
   1. Define specific gravity
   2. Define dynamic viscosity
   3. Define Gauge pressure
   4. Define Pathline

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   5. Define degree of reaction
   6. Define coefficient of discharge.
   7. State Buckingham pi theorem.
   8. Define Fluid.
   9. What is the SI unit for 'Head' as used in Hydraulic machines?

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   10. Define specific speed.

SECTION-B

2. Derive Bernoulli's equation. NOTE: Mention the assumptions clearly. [2M for assumptions, 3M for the derivation]
3. Explain the working of Mercuric manometer and explain how absolute pressure and gauge pressure of a system can be measured using this manometer.

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4. Explain the working of Fransis turbine with help of a neat velocity diagram.
5. A velocity field is given by the relation V = (xi – yj). Where V?and I are constants.
   1. Find the location in the flow field where the speed is equal to Vo
   2. Determine the streamlines.
6. With the help of a neat diagram, explain the working of a vane pump.

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SECTION-C

7. A centrifugal water pump has an impellers of width h = 5 cm, an inner radius of 7 cm, and an outer radius of 30 cm. It turns at 1,800 rpm. The inlet velocity is 6 m/s and the exit velocity is 7 m/s. Find the theoretical values of :
   1. Discharge rate
   2. Torque
   3. Head
   4. Pressure rise across the impeller.

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8. Apply Buckingham Pi theorem to a turbomachine and obtain its non-dimensional parameters.
9. Through control volume analysis, obtain Euler's equation for turbomachinery.

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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