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
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 line insulation is the insulation level of the station equipment.
A less than
B same as
C more than
D proportional to
E not directly related with
The insulation between windings and grounded core and the insulation between the windings of the same phase is
A minor insulation
B major insulation
C either of the above
D none of the above
Upto the critical radius of insulation, added insulation, will
A Increase the heat loss
B Decrease heat loss and will have no effect beyond that
C Decrease heat flux
D Reduce convection heat loss compared to conduction heat less
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
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
The air gap between the central electrode and ground (or side) electrode of a spark plug is around
A 0.2 mm
B 0.5 mm
C 1 mm
D 1.5 mm
In a petrol engine, the high voltage for spark plug is in the order of
A 1000 volts
B 2000 volts
C 11 kilovolts
D 22 kilovolts
Spark plug is provided in a/an
A Engine having carburettor
B Diesel engine
C Compression ignition engine
D Both (B) & (C)

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