The spark ignition engines are governed by

A Hit and miss governing
B Qualitative governing
C Quantitative governing
D Combination of (B) and (C)

Correct Answer: Quantitative governing

-The spark ignition engines are governed by Quantitative governing.-SI engines being quantitatively governed by controlling the quantity of charge inducted, leading to high throttling losses. -To qualitatively govern the engine, charge purity was reduced by incorporating EGR, thereby reducing the amount of available oxygen in the charge inducted.
Bissoy MCQ
#Mechanical Engineering #Internal Combustion Engines (I.C. Engines)

Related Questions

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 advancing of spark timing in spark ignition engines will _________ knocking tendency.
A Increase
B Reduce
C Not effect
D None of these
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 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
In spark ignition petrol engines maximum emission of Nox takes place when the air fuel ratio (A/F) is
A Very weak mixture and A/F ratio about 19
B Weak mixture and A/F ratio about 17
C Chemically correct mixture and A/F ratio about 15
D Rich mixture and A/F ratio about 13.
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
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
Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
A Volume
B Pressure
C Heat
D None of these

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