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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC- SEMESTER-I EXAMINATION SUMMER 2017
Subject Code: X11102 Date:03/06/2017
Subject Name: ELEMENTS OF MECHANICAL AND STRUCTURAL
Time: 02:30 PM to 05:00 PM Total Marks: 70
Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

What is the meaning of the term "one ton capacity" of Air Conditioner? Compare Window A.C. with Split A.C.
07

Explain with neat diagrams the working of Vapour Compression Refrigeration system.
07
Q.2

Draw air standard Diesel cycle on p-V and T-s diagram. Derive the expression for air standard efficiency of Diesel cycle with usual notations.
07

Explain with sketch the construction and working of four stroke petrol engine.
07
Q.3

List out the types of beams and show the different type of loads acting on beams with neat diagrams.
07

Write a short note on Thermodynamic Systems
07
Q.4

Derive relation between Modulus of Elasticity Modulus of Rigidity and Poisson's Ratio
07

Compare Two stroke I.C engines with four stroke I.C.engines.
07
Q.5

Classify the compressors. Draw neat sketch of any one.
07

In an air standard Otto cycle, the compression ratio is 7 and the compression begins at 35°C and 0.1 MPa. The maximum temperature of the cycle is 1100°C. Find (a)the temperature and the pressure at various points in the cycle(b)the cycle efficiency.
07
Q.6

Define the terms: Hardness Toughness Elasticity Plasticity
Ductility Rigidity Resilience
07

Define the terms: System Phase Specific heat Work Enthalpy
Pressure Thermal Efficiency
07
Q.7

Write a short note on: Thermodynamic Equilibrium
07

Write a short note on: Centrifugal pump
07