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Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018

Course Code: BE101-02
Course Name: INTRODUCTION TO MECHANICALENGINEERING SCIENCES
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any two questions, each carries 15 marks. Marks
1 a) Give the two statements of second law of thermodynamics and show their (6) equivalence.
b) Explain the working of a reaction steam turbine with a neat sketch. (5)
c) Write a short note about the qualitative ideas on entropy. (4)
2 a) State the zeroth law of thermodynamics. What is its physical significance? (4) b)
Distinguish between the terms heat engine, heat pump and refrigerator. (5)
c) Explain the working of a four stroke CI engine with suitable sketches. (6)
3 a) Mention any fourmilestones in Indian space program. (4) 0) Explain the working of gas
turbines. (5)
c) Explain the following: (6)
i)Principle of increase of entropy ii) Irreversibility 140) Available energy
PART B
Answer any two questions, each carries 15 marks.
4 2) List any six applications of refrigeration. (6) b) Explain the working of a split air
conditioning system with a suitable sketch. (5)
c) Mention the names any four vehicle manufactures in India along with their popular (4)
makes
5 லி Explain the following terms with respect to psychrometry (6)
i)WBT ii) Relative humidity iii) Dew point temperature
b) List the major components of an automobile. Also explain their individual (9)
functions.
6 a) How do we use refrigeration for the purpose of food preservation? (4) b) Explain any three
different types of jet engines mentioning their applications. (6)
c) Write a short note about aerodynamics. (5)
PART ^
Answer any two questions, each carries 20 marks.
7 a) Explain about the mechanical properties of common engineering materials. (7) 0) What are
CNC machines? What are their applications? (7)
€) Differentiate between following manufacturing methods: (6) i)Casting 1) Forging
iii) Rolling
8 ३) What are alloys? List any five alloys with their composition. (6) b) Distinguish between
BCC, FCC and HCP crystal structures. (6)
c) How do soldering process differ from brazing? (4)
त) What is grinding process in machining? (4)
9 a) Explain any four methods for testing engineering materials. (8) b) What is a welding
process? Explain any three welding techniques. (7)
c) Give few examples for the typical products produced by the following processes:
(5)
i) Forging ii) Extrusion iii) Turning iv) Milling v) Drilling

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