Related Questions

Which of the following does not relate to a spark ignition engine?
A Ignition coil
B Spark plug
C Carburettor
D Fuel injector
In practice, the compression ratio of compression-ignition (CI) engine ranges from
A 15 to 25
B 5 to 10
C 40 to 55
D 60 to 70
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
Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?
A inlet valve closing before bottom dead centre
B inlet valve closing after bottom dead centre
C inlet valve opening before top dead centre
D exhaust valve closing after top dead centre
The increase of efficiency of a compression ignition engine, as the load decreases, is due to
A Higher maximum temperature
B Qualitative governing
C Quantitative governing
D Hit and miss governing
The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to
A Inject fuel in a chamber of high pressure at the end of compression stroke
B Inject fuel at a high velocity to facilitate atomization
C Ensure that penetration is not high
D All of the above
The antiknock property of compression ignition engine fuel can be improved by adding
A Tetraethyl lead
B Trimethyl pentane
C Amyl nitrate
D Hexadecane
In a engineering, test, a rocket sled is propelled into a target. If the sled's distance d in meters from the target is given by the fomula d = - 1.5 t2+120, where t is the number of seconds after rocket ignition, then how many seconds have passed since rocket ignition when the sled is 10 meters from the target?
A 2.58
B 8.59
C 8.94
D 9.31

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