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FIRST SEMESTER B.TECH DEGREE EXAMINATION,
JANUARY 2016
Course Code:
ME100
Course Name:
BASICS OF MECHANICAL ENGINEERING
Max. Marks:
100 Duration: 3 Hours
PART A
Answer all questions, each question carries 3
marks
1. “No engine
can be made to work on Carnot cycle.” Justify the statement.
2. What will
happen, when diesel fuel is accidentally filled to a petrol car?
3. You are
appointed as an engineer in a refrigerator manufacturing company and are
assigned by a task of selecting the refrigerant. While selecting the
refrigerant point out the desirable properties you consider?
4. Carburetor
engines are now being replaced by MPFI engines. Comment.
5. List out the
different processes involved in powder metallurgy in the correct order.
6. List out any
six important properties of moulding sand.
7. Identify the
main operations which can be performed by a Lathe.
8. What is the
principle of operation of a planer?
PART B
Answer any 2 complete questions each having 6
marks
9. Draw the P-V and T-S diagram of a Carnot
cycle and explain the processes.
10. In a
constant volume “Otto cycle”, the pressure at the end of compression is 15
times that at the start, the temperature of air at the beginning of compression
is and maximum temperature attained in the cycle
is .
Determine (i) Compression rate (ii) Thermal efficiency of cycle (iii) Work done
per kg of air. Take for air = 1.4.
11. Explain the
principle of increase of entropy.
Answer any 2 complete questions each having 6
marks
12. With the
help of a neat sketch explain the working of a reciprocating compressor.
13. Compare the
working of two stroke and four stroke internal combustion engines.
14. How is steam produced in a
fire tube boiler? Explain with a neat
figure.
Answer any 2 complete questions each having 6
marks
15. Write a
short note on impact of refrigerants on environment.
16. Demonstrate
the working of a vapour compression refrigeration system with the help of a
neat sketch.
17. Distinguish
between window air conditioner and split air conditioner.
Answer any 2 complete questions each having 6
marks
18. Explain the
working of a cone clutch in an automobile.
19. Sketch
different types of gear trains and explain.
20. Explain the
different types of brakes.
PART C
Answer any 2 complete questions each having 7
marks
21. Discuss the
various properties of engineering materials.
22. In a certain
fabrication industry, they want to join two dissimilar metal pipes, which
method should they follow? Justify.
23. Differentiate
between welding, brazing and soldering.
Answer any 2 complete questions each having 7
marks
24. Draw the
neat sketch of a lathe and explain its principle parts.
25. Explain the
working principle of a shaping machine.
26. With a neat sketch, explain a drilling machine.style="display:inline-block;width:300px;height:250px"
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