DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE
MGM's, Jawaharlal Nehru Engineering College, Aurangabad
Mid Semester Examination – Sept.-Oct. 2019
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Course: S.Y. B. Tech in Mechanical Engineering
Subject Name: THERMODYNAMICS
Subject Code: BT-MEC 305
Date: - Oct. 9, 2019
Max Marks: 20
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Sem: III
Duration: 1 Hr.
Instructions to the Students:
- Use of scientific calculator is permitted
- Draw schematic diagrams whenever necessary
- Assume suitable data if necessary
- Mark one correct answer for MCQs
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Q. 1 Choose the correct answer.
| (Level/CO) | Marks | |
|---|---|---|
| CO1 | 6 | |
| 1 Density of fluid is | CO1 | 1 |
| a) Extensive property b) Intensive Property c) Path Function d) None of these | ||
| 2 Thermodynamic equilibrium is | CO1 | 1 |
| a) Thermal Equilibrium b) Chemical Equilibrium c) Mechanical Equilibrium d) All of these | ||
| 3 Isochoric Process involves | CO3 | 1 |
| a) Constant Pressure b) Constant Volume c) Constant Temperature d) Constant Entropy | ||
| 4 Kelvin-Plank statement states no heat engine exists | CO2 | 1 |
| a) Without Heat Gain b) Without Heat Rejection c) Without Work d) None of these | ||
| 5 Absolute thermodynamic temperature is expressed as | CO2 | 1 |
| a) temperature in °C b) temperature in °F c) temperature in K d) None of these | ||
| 6 Work and Heat transfers are | CO1 | 1 |
| a) State Function b) Path Function c) Properties of System d) None of these |
Q.2 Solve Any Two of the following.
| (A) Define Zeroth Law of Thermodynamics and explain with scientific example | CO2 | 3 |
| (B) A gas starts with 200 J of the internal energy and 180 J of heat is added to the gas which produce 70 J work. Determine the final Internal energy of the gas? | CO2 | 3 |
| (C) Explain Clausius statement with scientific example of refrigerator | CO2 | 3 |
Q. 3 Solve Any One of the following.
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| (A) A turbine operates under steady flow conditions, receiving steam 1.2 MPa at 188 °C with enthalpy 2785 kJ/kg and velocity 33.3 m/s at elevation of 3 m. This steam leaves the turbine at 20 kPa with enthalpy 2512 kJ/kg and velocity 100 m/s with elevation 0 m. Heat is lost to the surrounding at the rate of 0.29 kJ/s. If the steam flow rate through the turbine is 0.42 kg/s, what is the power output of the turbine in kW ? | CO3 | 8 |
| (B) In an insulated Nozzle, enthalpy of fluid passing is 3000 kJ/kg and velocity is 60 m/s while at the exit the enthalpy reduced to 2762 kJ/kg. The nozzle is kept horizontal. If the inlet area is 0.1 m² and specific volume at inlet is 0.187 m³/kg, determine the velocity at exit of nozzle and mass flow rate through the nozzle. | CO3 | 8 |
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This download link is referred from the post: DBATU B-Tech Last 10 Years 2010-2020 Previous Question Papers || Dr. Babasaheb Ambedkar Technological University