Abnormal Combustion MCQs : This section focuses on the "Abnormal Combustion". These Multiple Choice Questions (MCQs) should be practiced to improve the Abnormal Combustion skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
____________ knock occurs when the delay period is excessively long so that there is a large amount of fuel in the cylinder for the simultaneous explosion phase.
A. Petrol
B. Diesel
C. Kerosene
D. None of the mentioned
Question 2
Detonation can be prevented by increasing the manifold pressure by reducing the throttle opening.
A. TRUE
B. FALSE
Question 3
Detonation cannot be prevented by reducing peak cylinder pressure.
A. TRUE
B. FALSE
Question 4
Diesel knock is the sound produced by the very rapid rate of pressure rise during the early part of the uncontrolled second phase of combustion.
A. TRUE
B. FALSE
Question 5
If detonation is allowed to persist under extreme conditions or over many engine cycles, engine parts can be damaged or destroyed.
A. TRUE
B. FALSE
Question 6
In ____________ combustion, the flame initiated by the spark travels across the combustion chamber in a fairly uniform manner.
A. abnormal
B. normal
C. knocking
D. none of the mentioned
Question 7
In CI engines, abnormal combustion is not a great problem as in SI Engines.
A. TRUE
B. FALSE
Question 8
Knock is a function of the fuel chosen and may be avoided by choosing a fuel with characteristics that do not give too long a delay period.
A. TRUE
B. FALSE
Question 9
Knock is less common in ____________ climates.
A. hot
B. cold
C. normal
D. none of the mentioned
Question 10
The rate of pressure rise per degree of crank angle is then so great that an audible knocking sound occurs.
A. TRUE
B. FALSE