1. Why ICE is always open cycle while the ECE can be open or closed cycle? 2. Compare between the SI and Cl engines with respect to: (a) Ignition process; (b) Compression ratio; (c) Efficiency; (d) Engine speed; and (e) Weight. 3. What happen during the compression, and expansion of the four-struke Cl enginen? 4. Explain why the bmep is lower at the maximum rated power for a given engine than the bmep at the masimum brake torque. 5. The mean piston speed U,is greater for: (a) over square engine (b) under square engine (c) square engine 6. Two spark ignition petrol engines having the same swept volume and compression ratio are running at the same speed with wide open throttles. One engine operates on the two-stroke cycle and the other on the four-stroke cycle. State with reasons: () which has the greater power output? (ii) which has the higher efficiency?

1. Why ICE is always open cycle while the ECE can be open or closed cycle? 2. Compare between the SI and Cl engines with respect to: (a) Ignition process; (b) Compression ratio; (c) Efficiency; (d) Engine speed; and (e) Weight. 3. What happen during the compression, and expansion of the four-struke Cl enginen? 4. Explain why the bmep is lower at the maximum rated power for a given engine than the bmep at the masimum brake torque. 5. The mean piston speed U,is greater for: (a) over square engine (b) under square engine (c) square engine 6. Two spark ignition petrol engines having the same swept volume and compression ratio are running at the same speed with wide open throttles. One engine operates on the two-stroke cycle and the other on the four-stroke cycle. State with reasons: () which has the greater power output? (ii) which has the higher efficiency?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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