Ask Question / Post resume

Post a reply to the thread: Model Question Paper Mechanical Engineering www.pescemandya.org : P.E.S. College of Engineering

Your Message

Your Username:

Click here to log in

Notes:-
1) You can copy and paste your full resume in the box below.
2) Or you can ask your question. We try to answer, as far as possible.

Title:

[QUOTE=hemalathaijt;196313][B]Sub. Code: P08ME35
P.E.S COLLEGE OF ENGINEERING, MANDYA
Mechanical Engineering Department
An Autonomous Institution Under VTU, Belgaum
Model Question Paper
Third Semester B.E. Degree examination, October 2009-10
BASIC THRMODYNAMICS
Time: 3 hrs Max. Marks: 100[/B]

Instructions: 
1. Answer any FIVE full questions, choosing at least two from part A and  two from part B
2. Use of thermodynamics data hand book permitted

[B]Model Question List [/B]: [URL]http://www.pescemandya.org/pes_ug.php[/URL]
[B]Model Question Paper[/B] : [URL]http://www.pescemandya.org/pdf/mech/mech_question_paper.pdf[/URL]

Part-A
1. a. Distinguish between the following with example
i). Open and Closed system
ii). Extensive and Intensive property
iii). Path function and Point function
iv). Macroscopic and Microscopic point of view (06)
b. State and explain Zeroth law of thermodynamics (06)
c. The Mercury column of mercury in glass thermometer reads 75mm & 525mm when the thermometer is at ice point and steam point respectively. The temperature‘t’ varies linearly with ‘x’. Now assume that the length of the mercury column ‘x’ and temperature‘t*’ are related as t* = ax2 + b. Evaluate the temperature on this scale when the temperature is 100oF on the Fahrenheit scale. (08)

2. a. Obtain an expression for displacement work (06)
b. Explain the comparison between heat transfer & work transfer and show that work is a path function (06)
c. A spherical balloon having a radius of 30cm contains air at a pressure of 1.5 bar. The radius increases to 40 cm due to heating and during the process the pressure is inversely proportional to diameter. Calculate the magnitude and direction of work (08)

3. a. State precisely the First law of thermodynamics for a closed system undergoing a process & hence prove that Internal energy is a property of the system (10)
b. A centrifugal pump delivers 60 kg of water per second. The inlet and outlet pressure are 10 kPa and 400 kPa respectively. The suction is 2 m below and delivery is 8 m above the centre line of the pump. The suction and delivery pipe diameter are 20 cm and 10 cm respectively. Determine the capacity of the electric motor to run the pump. (10)

4. a. Sketch and explain P-V & P-T diagram for pure substances. (06)
b. Sketch and explain Separating & Throttling calorimeter. (06)
c. The pressure cooker contains 1.75 kg of steam at a pressure of 500 kPa and 0.89 dry. Determine the quantity of heat which must be rejected so that the quantity of steam becomes 0.55dry. (08)

Part-B
5. a. Define Reversible & irreversible process & mention the factors whit render a process irreversible (06)
b. Show that (COP) HP = 1+ (COP) Ref (06)
c. A Carnot engine operates between the temperature of 250oC and 40oC. Its efficiency will be improved with an increase of the source temperature to 300oC holding the rise in temperature at 40oC. Determine the sink temperature reduction necessary to effect the same improvement in efficiency holding the source temperature at 250oC. (08)[/QUOTE]

All times are GMT +5.5. The time now is 02:49 PM.