### ME6404  TE Important Questions

Anna University Regulation 2013 Mech ME6404  TE Important Questions for all 5 units and MECH 4th SEM ME6404  THERMAL ENGINEERING  Answer Key is listed down for students to make perfect utilization and score maximum marks with our study materials.

ME6404  TE Important Questions

UNIT – I GAS POWER CYCLE

PART- A (2 Marks)

1. Explain gas power cycle?
2. List out the assumptions made for the analysis of thermodynamic air cycles.
3. Complete the Otto cycle process by its P-V and T-S planes and name all the processes.
4. Define air standard cycle efficiency of an Otto Cycle.
5. Interpret the change in compression ratio affect the air standard efficiency of an ideal Otto Cycle?
6. Define MEP as applied to gas power cycles. Summarize its significance?
7. Illustrate the expression for MEP for an Otto cycle in terms of compression ratio and other parameters.
8. In an Otto cycle, pressure ratio during compression is 11. Estimate the air standard cycle efficiency.
9. A Carnot cycle works between the temperatures 300K and 700K. Calculate the maximum work possible per Kg of air.
10. Point out the Diesel cycle on P-V and T-S planes and mention the four thermodynamic processes involved.
1. Consider a Diesel engine has a compression ratio of 14 and cut-off takes place at 6% of the stroke. Find the air standard efficiency.
2. Express (Draw) the actual p-v diagram for four strokes SI Engine.
3. Define air standard cycle efficiency of a diesel Cycle.
4. Name the factors that affect the air standard efficiency of diesel cycle.
5. Define the terms compression ratio and cutoff ratio.
6. Predict the effect of cut-off ratio on the efficiency of diesel cycle when the compression ratio is kept constant?
7. Sketch the Dual cycle on P-V and T-S planes and order the various processes.
8. Prepare the P – v & T – s diagram for Otto cycle and Diesel cycle and Dual cycle for the same compression ratio and heat rejection, compare the efficiency.
9. For the same compression ratio and heat supplied, Identify the order of decreasing air standard efficiency of Otto, Diesel and Dual cycles.
10. Express the Brayton cycle (Limited pressure cycle) on P-V and T-S planes and mention the various processes.

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