Download DBATU B.Tech 2019 Oct-Nov Mech 3rd Sem thermodynamics Question Paper

Download DBATU (Dr. Babasaheb Ambedkar Technological University) B Tech 2019 Oct-Nov (Bachelor of Technology) Mech 3rd Sem thermodynamics Question Paper

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( DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE
MGM?s, Jawaharlal Nehru Engineering College, Aurangabad
Mid Semester Examination ? Sept.-Oct. 2019
Course: S.Y. B. Tech in Mechanical Engineering Sem: III
"Subject Name: THERMODYNAMICS
Subject Code: BT-MEC 305,
Max Marks: 20 Date: - Oct. 9, 2019 _ Duration: - 1 Hr.
Instructions to the Students:
1. Use of scienti?c calculator is permitted
2 Draw schematic diagrams whenever necessary
3. Assume suitable data if necessary
4 Mark one coirect answer for MCQs
(Level/CO) Marks
Q. 1 Choose the correct answer. 6
1 Density of ?uid is ? C01 1
a) Extensive property b) Intensive Property c) Path Function d) None of these i
2 Thermodynamic equilibrium is C01 1
a) Thermal Equilibrium b) Chemical Equilibrium c) Mechanical Equilibrium ' i
d) All ofthese
3 lsochoric Process involves C03 1
_ a) Constant Pressure b) Constant Volume 0) Constant Temperature (1) Constant Entropy
4 Kelvin-Plank statement states no heat engine exists C02 1
a) Without Heat Gain b) Without Heat Rejection 0) Without Work d) None of these
5 Absolute thermodynamic temperature is expressed as ' C02 1
a) temperature in ?C b) temperature in ?F 0) temperature in K d) None of these
6 Work and Heat transfers are 1 C0] 1
a) State Function b) Path Function 0) Properties of System (1) None of these
Q.2 Solve Any Two of the foilowing; 6
(A) Define Zeroth Law of Thermodynamics and explain with scientific example C02 '
(B) A gas starts with 200 J of the internal energy and 180 J of heat is added to the gas which C02 3
produce 70 J work Determine the ?nal Internal energy of the gas ? _
(C) Explain Clausius statement with scienti?c example of refrigerator C02 3
Q. 3 Solve Any One of the following. 8
(A) A turbine operates under steady ?ow conditions, receiving steam 1 2 MPa at 188 0C C03 8
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. 0
Heat is lost to the surrounding at the rate of 0.29 kJ/s. If the steam ?ow rate through the
turbine is 0 42 kg/s, what is the power output of the turbine in kW ?7
(B) In an insulated Nozzle,entha1py of ?uid passing is 3000 kJ/kg and velocity is 60 m/s ' C03 8
while at the exit the entzhalpy reduced to 2762 kJ/kg. The nozzle is kept horizontal. If
the inlet area is 0.1 m2 and speci?c volume at inlet is 0.187 m3/kg, determine the
velocity at exit of nozzle and mass ?ow rate through the nozzle
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