Important Question of THERMAL ENGINEERING-II
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- Explain the air-standard Brayton cycle and derive the expressions for work and efficiency.
- Classify gas turbines and compare them with reciprocating IC engines and steam turbines.
- Discuss the applications and limitations of gas turbines.
- Describe the different types of steam boilers and classify them.
- Define the properties of steam and explain their significance.
- Explain how to determine properties of steam using steam tables and Mollier chart.
- Solve simple direct problems related to steam properties using tables and charts.
- Describe steam calorimeters and their uses.
- Compare water tube and fire tube boilers.
- Describe the working of modern high-pressure boilers, such as Lamont and Benson boilers.
- Explain the concept of boiler mountings and boiler accessories.
- Discuss the flow of steam through a nozzle and derive the velocity of steam at the nozzle exit using the analytical method and Mollier chart.
- Calculate the discharge of steam through nozzles and determine the critical pressure ratio.
- Explain the methods of calculation for cross-sectional areas at throat and exit for maximum discharge in steam nozzles.
- Discuss the effects of friction in nozzles and the phenomenon of super saturated flow.
- Describe the working principle of a steam jet injector.
- Solve simple numerical problems related to steam nozzles.
- Classify steam turbines and provide examples for each type.
- Differentiate between impulse and reaction turbines.
- Explain the working principle of a De Laval turbine with line diagrams.
- Discuss velocity diagrams in steam turbines.
- Derive expressions for work done, axial thrust, tangential thrust, blade and diagram efficiency, stage efficiency, and nozzle efficiency.
- Explain methods of reducing rotor speed in steam turbines.
- Describe the concept of compounding in steam turbines.
- Explain the working principle of a Parsons Reaction turbine with a line diagram.
- Discuss velocity diagrams in a Parsons Reaction turbine.
- Solve simple problems on single-stage impulse turbines and reaction turbines.
- Describe bleeding, re-heating, and re-heating factors in steam turbines.
- Explain the governing of steam turbines, including throttle, bypass, and nozzle control governing.
- Discuss the various methods of steam turbine governing.
