Related Questions

The reference fuels for knock rating of spark ignition engines would include
A Iso-octane and alpha-methyl naphthalene
B Normal octane and aniline
C Iso-octane and normal hexane
D Normal heptane and iso-octane
The advancing of spark timing in spark ignition engines will _________ knocking tendency.
A Increase
B Reduce
C Not effect
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
With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
A Supercharging
B Wall temperature
C Compression ratio
D Engine speed
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
The auto ignition in a spark ignition engine means
A Automatic ignition of the charge at the end of compression
B Ignition induced by the passage of a spark
C Ignition of the charge before the passage of flame front
D Ignition induced to supplement the process of normal combustion
The best fuels for compression ignition engines are
A Straight chain paraffin
B Aromatics
C Branched chain paraffin
D Naphthalene
In petrol engines, advancing of the spark timing will _________ the knocking tendency.
A Not effect
B Decrease
C Increase
D None of these
The spark ignition engines are governed by
A Hit and miss governing
B Qualitative governing
C Quantitative governing
D Combination of (B) and (C)

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