Q84
Pick up the false statement
A.
Thermal efficiency of diesel engine is about 34%
B.
Theoretically correct mixture of air and petrol is approximately 15 : 1
C.
High speed compression engines operate on dual combustion cycle
D.
S.I. engines are quality governed engines
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
In this system of governing, the quality of charge (i.e. air-fuel ratio of the mixture) is kept constant. But the quantity of mixture supplied to the engine cylinder is varied by means of a throttle valve which is regulated by the centrifugal governor through rack and pinion arrangement.