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
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
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
The spark ignition engines are governed by
A Hit and miss governing
B Qualitative governing
C Quantitative governing
D Combination of (B) and (C)
A spark plug gap is kept from
A 0.3 to 0.7 mm
B 0.2 to 0.8 mm
C 0.4 to 0.9 mm
D 0.6 to 1.0 mm
Which of the following does not relate to a spark ignition engine?
A Ignition coil
B Spark plug
C Carburettor
D Fuel injector
The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of
A Morse test
B Prony brake test
C Motoring test
D Heat balance test
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
If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on
A Too lean mixture
B Stoichiometric mixture
C Most economical mixture
D Too rich mixture

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