Answer the following questions(i)Why the thermal efficiency of four strokes S.I. engines are morethan two strokes S.I. Engines?(ii) Mechanical efficiency of two strokes S.I. engines is more than fourstrokes S.I. engines why?(iii) Exhaust noise from silencer in case of two stroke engines is morethan four stroke engines why?(iv) For the same RPM two stroke engines produce almost double powerthan four stroke engines why?(v)What is the use of deflector used on the piston in case of two strokesS.I. Engines? What do you mean by scavenging process? It is positive in case offour strokes engines and negative in two strokes engines, Explain.(vi)(vii) In two stroke S.I. engines exhaust port is placed slightly at higherlevel than transfer port. Why?(viii) Piston rings are used on the piston why?(ix) What is optimum percentage of lubricant oil used in petrol in case oftwo strokes S.I. engines?(x)What is compression ratio? State numerical value of compressionratio in two strokes and four stroke S.I. engines.

(i) As we know that in four stroke engine there are 2 revolution of crankshaft with one power stroke…

(i) Why the thermal efficiency of four strokes S.I. engines are more than two strokes S.I. Engines? (ii) Mechanical efficiency of two strokes S.I. engines is more than four strokes S.I. engines why? (iii) Exhaust noise from silencer in case of two stroke engines is more than four stroke engines why?

(i) Why the thermal efficiency of four strokes S.I. engines are more than two strokes S.I. Engines? (ii) Mechanical efficiency of two strokes S.I. engines is more than four strokes S.I. engines why? (iii) Exhaust noise from silencer in case of two stroke engines is more than four stroke engines why?

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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