Related Questions

In petrol engines, advancing of the spark timing will _________ the knocking tendency.
A Not effect
B Decrease
C Increase
D None of these
In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
A Low density
B Low temperature
C Long ignition delay
D All of these
The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency.
A Increase
B Reduce
C Not effect
D None of these
With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
A Supercharging
B Wall temperature
C Compression ratio
D Engine speed
The knocking tendency in compression ignition engines for a given fuel will be
A Enhanced by decreasing compression ratio
B Enhanced by increasing compression ratio
C Dependent on other factors
D None of the above
The knocking in spark ignition engines can be reduced by
A Retarding the spark
B Increasing the engine speed
C Both (A) and (B)
D None of these
The fuels in order of decreasing knock tendency for spark ignition engines are
A Paraffin, aromatic, napthene
B Paraffin, napthene, aromatic
C Napthene, aromatics, paraffin
D Napthene, paraffin, aromatic
In order to eliminate knocking in compression ignition engines, there should be
A Short delay period
B Late auto-ignition
C Low compression ratio
D High self ignition temperature of fuel
The most accurate ignition system of a spark ignition engine is
A Magneto system
B Battery system
C Electronic control unit system
D Magneto and electronic system
The ignition in a spark ignition engine takes place when the piston is
A Exactly at the T.D.C. position on its compression stroke
B Approaching the T.D.C. position on its compression stroke
C Leaving the T.D.position on its compression stroke
D Approaching the T.D.C. position on its exhaust stroke

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