Maharashtra State Board of Technical Education 2009 Diploma Fabrication Engineering of Basic Thermodynamics - Question Paper

Sample ques. Paper
Course Name : Fabrication Technology & Erection Engineering
Course Code : FE
Semester : Sixth
Subject : Basic Thermodynamics
Marks : 80 Time: three Hrs.
Instructions:
1. All ques. are compulsory.
2. Illustrate your answers with neat sketches wherever necessary.
3. Figures to the right indicate full marks.
4. presume suitable data if necessary.
5. Preferably, write the answers in sequential order.
Q.1 ans any 4 of the following: 16 Marks
a) State 2 advantages and 2 limitations of solar energy.
b) Differentiate ranging from open thermodynamic system and closed thermodynamic system
with 1 example of every.
c) describe the terms 'Intensive Property' and 'Extensive Property' and provide 2 example
of every.
d) (i) describe dryness fraction
(ii) describe degree of superheat.
e) (i) Draw the sketch of kinds of nozzles.
(ii) provide 2 applications of nozzles.
f) describe pre-ignition and elaborate the factors responsible for it?
Q.2Answer any 2 of the following: 12 Marks
a) Draw a tagged sketch of Bio-gas plant. State 2 advantages and 2 limitations of
the identical.
b) Write the steady flow energy formula stating the meaning of every term. Apply the
formula to a boiler and turbine.
c) obtain the condition of steam in subsequent cases.
(i) Pressure 1.5 bar and specific quantity 0.98 m3/kg.
(ii) Pressure 10 bar and temperature 200oC.
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Q.3 ans any 3 of the following: 12 Marks
a) Draw Temperature – Entropy diagram for steam formation and show on it
(i) Liquid line
(ii) Critical point
(iii) 2 phase region
(iv) Dry saturated steam line
b) discuss the difference ranging from Impulse turbine and Reaction turbine.
c) State 2 sources of air leakage in condensers and 2 effects of it on the
performance of the condenser.
d) Represent the 4 processes of an Otto cycle on a PV and TS diagram.
Q.4 ans any 2 of the following: 16 Marks
a) discuss the working of 2 stroke petrol engine. Where it used?
b) Prove the equivalence of Kelvin Planck and Clausius statement.
c) Draw a tagged sketch of Balcock and Wilcox boiler. Show the path of water steam
and Air-fine gas.
Q.5 ans any 3 of the following: 12 Marks
a) State any 4 application of Heat Exchanger.
b) State advantages and limitations of wind energy.
c) Compare tow stroke and 4 stroke engines.
d) elaborate the main requirements of a surface condenser? Sketch a surface condenser in
which dry vacuum system is used.
Q.6 ans any 3 of the following: 12 Marks
a) Draw the sketch of any 1 kind of cooling tower.
b) Draw a tagged sketch of shell and tube heat exchanger.
c) In an engine working on ideal otto cycle the temperature at the beginning and end of
compression are 120o C and 498o C respectively. obtain air standard efficiency of the
engine.
d) Classify heat exchangers. State 4 materials used for heat exchangers.

Earning:   Approval pending.