Related Questions

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
The compression ignition engines are governed by
A Hit and miss governing
B Qualitative governing
C Quantitative governing
D Combination of (B) and (C)
In compression ignition engines, swirl denotes a
A Haphazard motion of the gases in the chamber
B Rotary motion of the gases in the chamber
C Radial motion of the gases in the chamber
D None of the above
In order to eliminate knocking in compression ignition engines, there should be
A Short delay period
B Late auto-ignition
C Low compression ratio
D High self ignition temperature of fuel
The delay period in compression ignition engines depends upon
A Temperature and pressure in the cylinder at the time of injection
B Nature of the fuel mixture strength
C Relative velocity between the fuel injection and air turbulence pressure of residual gases
D All of the above
The object of providing masked inlet valve in the air passage of compression ignition engines is to
A Enhance flow rate
B Control air flow
C Induce primary swirl
D Induce secondary turbulence
The knocking tendency in compression ignition engines for a given fuel will be
A Enhanced by decreasing compression ratio
B Enhanced by increasing compression ratio
C Dependent on other factors
D None of the above
The combustion in compression ignition engines is
A Homogeneous
B Heterogeneous
C Both (A) and (B)
D None of these
Combustion in compression ignition engines is
A Homogeneous
B Heterogeneous
C Both (A) and (B)
D Laminar

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