Question:-
For same power output and same compression ratio, as compared to two-stroke engines, four-stroke S.I. engine have
Option (A)
Higher fuel consumption
Option (B)
Lower thermal efficiency
Option(C)
Higher exhaust temperatures
Option(D)
Higher thermal efficiency
Correct Option:
(D)
Question Solution:
High fuel consumption, low thermal efficiency and high exhaust temperatures will be associated with 2 stoke engine.
4 stroke engine will have high thermal efficiency because mass flow rate of fuel required will be less in comparison to 2-stroke engine for same power
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