In CI engine, combustion occurs by the high temperature produced by the compression of the air.
a) True
b) False
Q.2.
In the CI engine, the intake is air alone and the fuel is injected at high pressure in the form of fine droplets at the start of compression.
a) True
b) False
Q.3.
What are the phases of CI engine combustion?
a) ignition delay period
b) period of rapid combustion
c) period of controlled combustion
d) all of the mentioned
Q.4.
The rate of pressure rise depends on the amount of fuel present at the end of delay period, degree of turbulence, fineness of atomization and spray pattern.
a) True
b) False
Q.5.
Which of the following factors affecting combustion in the CI engine?
a) ignition quantity of fuel
b) injection pressure of droplet size
c) injection advance angle
d) all of the mentioned
Q.6.
Which of the following factors affecting combustion in the CI engine?
a) compression ratio
b) intake temperature
c) jacket water temperature
d) all of the mentioned
Q.7.
Which of the following factors affecting combustion in the CI engine?
a) intake pressure
b) engine speed
c) load and air to fuel ratio
d) all of the mentioned
Q.8.
Towards the end of the compression stroke when injection of the fuel into the combustion chamber commences, the quantity of fuel discharged is spread out over a predetermined period.
a) True
b) False
Q.9.
The rate of burning does not depend on the relative movement of the burning droplets to the surrounding air charge.
a) True
b) False
Q.10.
In CI engines fuel is injected into the combustion chamber at about 15ºC ___________ TDC during compression stroke.
a) after
b) before
c) at
d) none of the mentioned
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