What is meant by knocking? Why does it occurs?

himanshu shekhar

• Nov 10th, 2013

knocking is natural phenomenon which occurs in ic engine. no scientist in the world is capable to clearly explain this phenomenon but the explain much part of them.... how it occurs... in petrol eng...

Bhushan Kulkarni

 Profile Answers by Bhushan Kulkarni Questions by Bhushan Kulkarni

• Aug 11th, 2011

"knocking" or "pinking" is the phenomenon in which pressure wave of high altitude generated strikes wall of combustion chamber.pre. waves are generated because fuel attain self ignition temp. before flame front created by spark plug reaches to it.
THE MAIN FACTOR RESPONSIBLE IS PRE-IGNITION.

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What is the difference between lathe & milling machine? What are the operations that we cannot perform in lathe but milling?

ravi patel

• Aug 8th, 2014

In Lathe, the job will be rotating, tool is stationery. While in milling machine job is stationery and the tool is rotating.

ADIRAJ C K

• Jul 12th, 2014

IN LATHE, THE JOB WILL BE ROTATING TOOL IS STATIONARY. WHILE IN MILLING M/C JOB IS STATIONERY AND TOOL IS ROTATING.

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Answered by: Anne Srinivas.

• Jul 14th, 2006

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A 4-s engine is that in which for every four revolutions of crank one power stroke is produced.  

sahid

• Jan 26th, 2018

Four stroke means suction stroke, compression stroke, ignition stroke, exhaust stroke of an engine.

Prabhu.s

• Oct 7th, 2017

Piston moves from top dead centre to bottom dead centre is known as a stroke its take half revolution of crank shaft. In a four stroke engine we get the energy on power stroke. Its complete two revolutions of crank shaft. The four strokes are suction, compression, power, exhaust.

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