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

Correct Answer: Approaching the T.D.C. position on its compression stroke

The ignition in a spark ignition engine takes place when the piston is Approaching the T.D.C. position on its compression stroke
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#Mechanical Engineering #Automobile Engineering

Related Questions

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 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
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
If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called
A Detonation
B Ignition
C Pre-ignition
D Rumble
A basic difference between the spark ignition engine and the Diesel engine is that the
A Diesel engine compresses air alone instead of an air-fuel mixture
B Air temperature ignites the fuel in the Diesel engine
C Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.on the compression stroke
D All of the above
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.
A Equal to
B Twice
C Three times
D Four times
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 ignition of the charge by some hot surface within the engine before the passage of spark is called
A Pre-ignition
B Detonation
C Ignition delay
D Auto-ignition
Which of the following does not relate to a spark ignition engine?
A Ignition coil
B Spark plug
C Carburettor
D Fuel injector

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