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B1D109S Pages: 2

Reg. No. Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION, JULY 2017

Course Code: BE101-02

Course Name: INTRODUCTION TO MECHANICAL ENGINEERING SCIENCES.

Max. Marks: 100 Duration: 3 Hours

PARTA

Answer any two full questions.

. a) State the difference between extensive, intensive & specific properties. Quote

examples. (6)
b) What is the essence of first law of thermodynamics? Write down expressions for first
law applied to a (i) a process (ii) a cycle. What are limitations of first law? (6)
c) What is meant by available energy? (3)
. a) Explain carnot cycle. (3)

b) A Carnot engine receives 800kJ of heat per cycle from a high temperature reservoir

at 4000C and rejects heat at 2010 . Find the theoretical efficiency of the cycle and

amount of heat rejected to low temperature heat reservoir. (6)
c) Narrate the history of development of steam engine, steam turbine & hydraulic
turbines. (6)
. a) Sketch and explain the working principle of Francis Turbine. (5)

b) Explain the working of a four stroke SI engine. (5)

c) What are the applications of air compressors? Explain the working principle of
centrifugal air compressor. (5)

PART 13

Answer any two full questions.

. a) Draw the schematic diagram of a vapour compression refrigeration system and show

the process in T-S diagram. (5)

b) Compare the advantages and disadvantages of food preservation using refrigeration
and freezing. (5) c) Draw the block diagram and explain the working of a window
AC unit. (5)

. a) Sketch and explain the working of a Fuel pump. (6)
b) What are the different types of scavenging system in automobiles? (6)
c) Explain Winter and Summer air conditioning. (3)

. a) Define Lift, Drag and Thrust in aerodynamics. (5)

b) Draw a block diagram representing the power line from engine to wheel of an
automobile (Rear wheel drive) and name the components. (5)

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