D NSA192007

Reg No.:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER B.TECH DEGREE EXAMINATION, DECEMBER 2019

Course Code: EST 120
Course Name: BASICS OF CIVIL & MECHANICAL ENGINEERING

PART ۱۱: BASIC MECHANICAL ENGINEERING
(2019-Scheme)
Max. Marks: 50 Duration: 90 min
PARTA
Answer all questions, each carries 4 marks.
1 Draw the p-V diagram of a diesel cycle and define the terms (i) (4)
Compression ratio, (ii) Expansion ratio, and (iii) Cut-off ratio related to the
Diesel cycle.

2 With the help of a neat sketch show the important parts of an internal (4)

combustion engine.

2

Define Cooling and Dehumidification .Also show the process in (4)

psychrometric chart.

4 Differentiate between Impulse and Reaction turbine. Give examples for (4)
each type.
5 Define the terms Rapid prototyping and Additive manufacturing. (4)
PART B
Answer one full question from each module, each question carries 10 marks
Module-IV
6 An engine working on Diesel cycle has diameter 150 mm and stroke 200 (10 )

mm. The clearance volume is 10 % of the swept volume. Determine the
compression ratio and air standard efficiency of the engine if the cut-off

takes place at 6 % of the stroke.

OR
7 ஐ Explain the MPFI system with block diagram. Also give its advantages (6)
b) Give the concept of hybrid engines. (4)
Module-V
8 2) A centrifugal pump using 119 of electric motor for pumping water against (5)

3m suction head and 7m delivery head. The discharge of the pump is 100
litters /minute. Find the efficiency of pump.
b) Explain the open belt and cross belt drive in power transmission. Also give (5)

the applications.

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