Answer / guest

Low grade fuel means more impurity in the fuel like presence
of lead and sulphur. This could cause early deposition of
sludge,increase viscosity of the sump oil (which reduces
mobility between reciprocating parts ie connecting shaft of
the piston and the main shaft),lower performance like
slowing down of acceleration,decreased mileage(this happens
because the engine automatically compensates for usage of
low quality fuel by consuming more fuel),causes detonation
in engines.
Detonation (generally caused by fuel with a low octane
rating) is the tendency for the fuel to pre-ignite or auto-
ignite in an engine's combustion chamber. This early (before
the spark plug fires) ignition of fuel creates a shock wave
throughout the cylinder as the burning and expanding fuel
air mixture collides with the piston that is still traveling
towards top-dead-center. The resulting knock/ping is the
sound of the pistons slamming against the cylinder walls.
Severe detonation can break pistons and destroy engines.

What is an EN Material. What is the difference of EN8, EN24, EN40.

5 Answers   Aeronautical Society of India, Ecil, Finearc, Saint Gobain, Scitech Centre, Universal Engineering Works,

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during the design of a friction clutch what are the considerations that should be made?

0 Answers   BEL,

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one ball fall from a roof & after two hits of to floor it's reach up to half of the roof height. than what is the cofficient of restitution.

1 Answers   BARC,

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What are the most immediate challenges of this position that need to be addressed in the first three months?

1 Answers  

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what is difference between fan and blowers

0 Answers  

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sir, I am applied RRB chennai,for Section engineer (mechanical),Pls mail 2007,2007 & 2008 years solved question papers.My Mail Id:nathan_cs65@yahoo.com Thanking you

0 Answers   RRB,

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why transformer required and why not voltage directly supply from power generation to the applications

3 Answers  

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substance is flowing in a pipe of 200 mm inside cylinder diameter ot an average velocity of 3m/sec. At a given section of the pipe line the pressure is 1.5 MN/m² absolute. what is the flow work of 0.5 cubic meter, expressed in joules passing through section? (a)1J, (b)75000J, (c)90000J, (d)25000J

1 Answers  

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• What is more important to you: the money or the work?

1 Answers   Petro Star Mount,

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What is the relationship between cop of heating and cooling ?

0 Answers  

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i have completed b.tech from mechanical engg so plz send me some question paper for entrance exam

0 Answers   Shipping Corporation of India,

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• What level of management did you consider this position to be?

1 Answers   Petro Star Mount,

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