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SPPU First Year Engineering (Semester 2)
Basic Mechanical Engineering (BME)
October 2012
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Answer any one question from Q1 & Q2
1 (a) Define open system, closed system, internal energy, enthalpy.
8 M
1 (b) Explain irreversibility, reasons and examples.
8 M

2 (a) Define isolated system, isobaric process, isothermal process, cycle.
8 M
2 (b) Explain heat engine and heat pump with formulas of efficiency and COP.
8 M

Answer any one question from Q3 & Q4
3 (a) Classify boilers, and state any four mountings and 4 accessories.
8 M
3 (b) Explain two stroke petrol engine with figure.
8 M

4 (a) raw sketches and state uses of
i) impulse turbine ii) single acting reciprocating pump.
8 M
4 (b) Define Ton of refrigeration, pressure ratio of compressor, split AC, refrigeration effect.
8 M

Answer any one question from Q5 & Q6
5 (a) State and explain Newton's law of cooling. A person is standing in a room which is at 20°C. Find rate of heat transfer from person, if exposed surface area and body temp. are 1.6 m2 and 36.7°C respectively. Given: convective heat transfer coefficient : 6W/m2k.
8 M
5 (b) Describe hydro-electric power plant with figure.
8 M
5 (c) Define thermal conductivity.
2 M

6 (a) Explain concept of thermal resistance in series and parallel.
8 M
6 (b) Describe Nuclear power plant with figure.
8 M
6 (c) State Stefan Bolfzman's law.
2 M

Answer any one question from Q7 & Q8
7 (a) Explain open belt and cross belt drive.
8 M
7 (b) Explain with sketch : cone clutch and band brake.
8 M

8 (a) Classify gears. State advantages of geardrive over belt drive.
8 M
8 (b) Explain with sketch, types of keys and bevel gear.
8 M

Answer any one question from Q9 & Q10
9 (a) Explain soldering and brazing processes.
8 M
9 (b) escribe shearing, bending, squeezing and drawing operations for sheet metal.
8 M

10 (a) Explain steps of design process.
8 M
10 (b) Describe sand casting process.
8 M

Answer any one question from Q11 & Q12
11 (a) Draw only block diagram of : center lathe machine. Explain any two operations.
8 M
11 (b) Describe 4 operations on milling machine.
8 M
11 (c) Sketch cylindrical grinding operation.
2 M

12 (a) Draw block diagram of CNC machine, state advantages and applications.
8 M
12 (b) Describe 4 operations on drilling machines.
8 M
12 (c) Sketch centerless grinding.
2 M

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