Question:-
Which of the following action(s) increase(s) the knocking tendency in the SI engine?
Option (A)
Increasing mixture strength beyond equivalence ratio (f) = 1.4
Option (B)
Retarding the spark and increasing the compression ratio
Option(C)
Increasing the compression ratio and reducing engine speed
Option(D)
Increasing both mixture strength beyond equivalence ratio (f) = 1 .4 and the compression ratio
Correct Option:
(C)
Question Solution:
Increasing CR will increases temperature and reduction in engine speed slows down flame speed travel.
question-answer-faq-9195