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Manufacturing Process 1 Question Paper - Dec 18 - Mechanical Engineering (Semester 3) - Pune University (PU)
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Manufacturing Process 1 - Dec 18
Mechanical Engineering (Semester 3)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
1.a.
Define and explain on P-v diagram:
(6 marks)
00
(i)Thermodynamics state
(ii)Thermodynamics Process
(iii)Thermodynamics Cycle.
1.b
Experimental data of Specific heat capacity measurement of air at constant Pressure are as follows :
(6 marks)
00
- Mass of air = 0.05 kg
2.Air heated from 287 K to 347 K for 300 seconds using a heater with input Power-10.04 W.
- Adiabatic index = 1.4.
Determine: 1. Specific heat of air at constant pressure. 2. Characteristics gas constant of Air (R) 3. Density of air at 273 K and 1 bar.
2.a
Draw any three of the following processes:(i) Constant Pressure and Isobaric process on P-v diagram (ii) Constant volume or Isochoric process on P-v diagram (iii) Constant temperature or Isothermal Process on T-s diagram.
(iv) Reversible Adiabatic or Isentropic Process on T-s diagram.
(6 marks)
00
2.b
The COP of the Carnot refrigerator is 6, when it maintains the temperature of 270 K in the evaporator. Determine the condensor temperature and refrigerating effect if the power required to run the refrigerator is 7.5 kW.
(6 marks)
00
3.a
Define and explain any six of the following terms with neat sketch showing piston, cylinder arrangement for air standard cycle:
(i) Clearance volume (ii) Swept volume (iii) Total Volume (iv) TDC (v)BDC (vi) Compression ratio (vii) Air standard efficiency .
(6 marks)
00
3.a
A throttling calorimeter is used to determine the dryness fraction of the steam using steam at 10 bar. The condition of steam using steam at 10 bar. the condition of steam after throttling is 1.2 bar, 118degC. Calculate the dryness fraction of the steam assuming Cp=2.1 kJ/kg.
(6 marks)
00
4.a
State and explain different components of Rankine cycle on flow diagram and draw the Thermodynamics cycle on T-s diagram .
(6 marks)
00
4
TYPE_QUESTION_HERE
(5 marks)
00
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