Question
a.
In compression ignition engines, detonation occurs near the beginning of combustion.
b.
Since the fuel, in compression ignition engines, is injected at the end of compression stroke, therefore, there will be no pre-ignition.
c.
To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.
d.
In compression ignition engines, because of hetrogeneous mixture, the rate of pressure rise is comparatively lower.
Posted under Mechanical Engineering
Interact with the Community - Share Your Thoughts
Uncertain About the Answer? Seek Clarification Here.
Understand the Explanation? Include it Here.
Q. Which of the following statement is wrong ?
Similar Questions
Explore Relevant Multiple Choice Questions (MCQs)
Q. The maximum propulsive efficiency of a turbo-jet engine is at a speed of
View solution
Q. In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then __________ is employed.
View solution
Q. The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.
View solution
Q. In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
View solution
Q. The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.
View solution
Q. The mechanical efficiency (ηm) of the engine is given by
View solution
Q. A gas engine has a swept volume of 300 cm³ and clearance volume of 25 cm³. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is
View solution
Q. The correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines is
View solution
Q. The engines in which the combustion of fuel takes place inside the engine cylinder are called internal combustion engines.
View solution
Q. A fuel will detonate less if it has higher self ignition temperature.
View solution
Q. The combustion in compression ignition engines is
View solution
Q. Which of the following fuel detonates readily ?
View solution
Q. If the speed of the engine is increased, the indicated power will
View solution
Q. The petrol engines are also known as __________ engines.
View solution
Q. The specific fuel consumption per B.P. hour for a petrol engine is about
View solution
Q. The material most commonly used for sheilding is
View solution
Q. In order to eliminate knocking in compression ignition engines, there should be
View solution
Q. The air standard efficiency of an I.C. engine depends on
View solution
Q. The mean effective pressure of a diesel engine having fixed compression ratio will __________ if cut off ratio decreases.
View solution
Q. The knocking tendency in spark ignition engines may be decreased by
View solution
Recommended Subjects
Are you eager to expand your knowledge beyond Mechanical Engineering? We've handpicked a range of related categories that you might find intriguing.
Click on the categories below to discover a wealth of MCQs and enrich your understanding of various subjects. Happy exploring!