Diploma Thermal Engineering 1 Model Question Paper

Diploma Thermal Engineering 1 Model Question Paper

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We are adding  Diploma Thermal Engineering 1 Model Question Paper for N Scheme  Check the link below to download Diploma Thermal Engineering 1 Model Question Paper in pdf 

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Department    : Mechanical Engineering                             Year/Sem       :           II/III

Subject Name  : Thermal Engineering-I                  Subject Code :           4020340

Date                :                                                                       Marks             :           100Marks

Note:           

(i)Answer all question in PART-A

(ii) Answer division (A) or (B) of each question in PART-B

(iii) Each question carries 3 marks in PART-A and 14 marks in PART-B)

 

PART-A

1. What is the difference between isothermal process and adiabatic process
2. State the second law of thermodynamics
3. Draw the P-V and T-S diagram of otto cycle and diesel cycle and indicate the                                  processes  involved
4. Write down the general equation for (i) Turbine (ii) Condenser
5. Comparison between petrol and diesel engine.
6. Write short notes on (i) Connecting rod (ii) Piston     (iii) Crank shaft
7. Determine the stochoiometric air required for complete combustion of 1 kg of coal whose analysis by mass is given below Carbon-78%; Hydrogen=3%; Oxygen- 3%; Sulphur -1%; Ash-10%; Moisture-5%
8. Define i) Mechanical efficiency ii) Brake thermal efficiency    iii) Relative efficiency
9. Compare room air conditioner and central plant air conditioner
10. Differentiate vapour compression and vapour absorption refrigeration system

PART-B

11. A) 0.5 kg of certain gas expands adiabatically. The initial pressure and temperature are 5 bar and 185⁰ C respectively. The final pressure is 1.15 bar and temp falls by 165⁰ C during the expansion. If the gas does 53 KJ of work, determine the two principle specific heat capacity of the gas and constant of the gas.

(OR)

B) A gas at a pressure of 700 KN/m² and expands from a volume of 0.075 m³ to 0.36 m³ according to the law PV².= C. Determine (i) Final temperature ii) Workdone iii) Heat transferred. Take = 1.4 and R = 0.29 KJ/Kg.K.

12. A) Derive an expression for air standard efficiency of otto cycle in terms of temperature.

(OR)

B) Brief about the engineering applications of study flow energy equation

 

13. A) i) Briefly explain with neat sketch 4 stroke petrol engine

ii) Explain with neat sketch simple carburetor

(OR)

B) i) Explain with neat sketch magneto coil ignition system

ii) Define cooling system and briefly explain with neat sketch water cooling system

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14. A) i) Explain with neat sketch, the analysis of exhaust gases using exhaust gas analyser.

ii) Describe with neat sketch the method of determining HCV and LCV of a gaseous fuel using Junkers’s gas calorimeter

(OR)

 B)i) Explain how calorific value of a fuel is determining using bomb calorimeter

ii) Briefly explain the classification of fuels

15. A) i) Explain with line diagram the working of vapour compression refrigeration system

ii) Enumerate the various loads to be encountered in A/C

(OR)

B) i) Explain with line diagram the working of vapour absorption refrigeration system

ii) What are the factors to be considered in air conditioning for human comport?

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