**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)**

- Explain gas power cycle?
- List out the assumptions made for the analysis of thermodynamic air cycles.
- Complete the Otto cycle process by its P-V and T-S planes and name all the processes.
- Define air standard cycle efficiency of an Otto Cycle.
- Interpret the change in compression ratio affect the air standard efficiency of an ideal Otto Cycle?
- Define MEP as applied to gas power cycles. Summarize its significance?
- Illustrate the expression for MEP for an Otto cycle in terms of compression ratio and other parameters.
- In an Otto cycle, pressure ratio during compression is 11. Estimate the air standard cycle efficiency.
- A Carnot cycle works between the temperatures 300K and 700K. Calculate the maximum work possible per Kg of air.
- Point out the Diesel cycle on P-V and T-S planes and mention the four thermodynamic processes involved.

- 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.
- Express (Draw) the actual p-v diagram for four strokes SI Engine.
- Define air standard cycle efficiency of a diesel Cycle.
- Name the factors that affect the air standard efficiency of diesel cycle.
- Define the terms compression ratio and cutoff ratio.
- Predict the effect of cut-off ratio on the efficiency of diesel cycle when the compression ratio is kept constant?
- Sketch the Dual cycle on P-V and T-S planes and order the various processes.
- 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.
- For the same compression ratio and heat supplied, Identify the order of decreasing air standard efficiency of Otto, Diesel and Dual cycles.
- Express the Brayton cycle (Limited pressure cycle) on P-V and T-S planes and mention the various processes.

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ME6404 Answer Key, TE Unit wise Important Questions- MECH 4th Semester