Related Questions

The advancing of spark timing in spark 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
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
An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petrol. Again when the tank was half-empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol at present in the tank?
A 33.5%
B 37.5%
C 40%
D 50%
An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petrol. Again when the tank was half-empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol at present in the tank ?
A 33.5%
B 37.5%
C 40%
D 50%
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency.
A Not effected
B Decrease
C Increase
D None of these
The increase of cooling water temperature in petrol engine will _________ the knocking tendency.
A Not effect
B Decrease
C Increase
D None 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
Knocking tendency in a petrol engine decreases with increasing
A Supercharging
B Compression ratio
C Wall temperature
D Engine speed
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

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