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6-stroke engine
What is the concept of 6-stroke engines? how it works?
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What is the concept of mpfi?
What is the concept of mpfi and what is its working principle?
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Heat Direction
What is the direction of heat (i.e,whether it moves in straight line path or in wave motion or has dual nature)
Bhushan Kulkarni
- Aug 10th, 2011
As per heat transfer, heat flows in the direction perpendicular to area of heat flow.
VELMURUGAN
- Jul 13th, 2011
In wave form
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What is the role of mechanical engineers in i.t.industry?
MANISH L SHIRBHATE
- Aug 25th, 2011
Mechanical is one of the wast branch in engg. it divided in to various sub branch a/c to application like automobile production metallurgy textile........ engg. Even designing any electronics component need to define it's mechanical strength
sjonathan
- Sep 21st, 2010
Role is to know the failure where it occurs, by calculating forces, stresses, strains, etc. and to load material in safety condition.
For this we have to know the property of material, thermal conductivity, mass, etc. and to optimise the cost of manufacturing, speed of production. so on. -
Octane Number and Cetane Number
What is the octane number of gasoline and cetane number of diesel used in India?
pradeep
- Sep 11th, 2011
Cetane No. Diesel - 45 to 55
Octane No. Petrol - 80 to 85bijuvh
- Oct 25th, 2009
The higher the octane rating, the slower the fuel burns. High-performance engines typically have higher compression ratios (and hence longer piston strokes) which requires higher octane (slow burning)...
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Propulation in rockets
can we propel a rocket during its orbit around a planet using highly pressurised helium or nitrogen gas which would lessen the fuel consumption ?Or can we use it to launch a blastic missile?
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What mine by glass line reactors
sudeeb
- Sep 17th, 2011
Glass lined reactor or GLR, it is a special type of reactor specially used in pharma and speciality chemical production plant where product material should be isolated from metal. its only a layer of coating in ordinary SS or ms reactor.
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Quality control of piping
My question is that who to maintain quality in piping with welding or without welding of the metal and what are the materials use in piping generally
sudeeb
- Sep 17th, 2011
Material for piping is SS.CS,PVC,HDPE etc. the selection is based on the specific application and corrosion of material.
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MPFI
How does MPFI works? & explain me the mechanism of it? What is the purpose of it ?
Rajnish Kumar
- Sep 22nd, 2011
MPFI means Multi point fuel injection.MPFI injects fuel into the intake ports just upstream of each cylinder's intake valve, rather than at a central point within an intake manifold. MPFI (or just MPI...
Lokesh M
- Sep 18th, 2011
MFIS stands for Multi Fuel Injection System. MFIS controls timing along with the amount of fuel that gets injected. In MFIS, air and the fuel is mixed just before the inlet. MPFI system injectors ar...
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Mechanical engineering field
What is the role of a mechanical engineer? what are the opportunities of a mechanical engineer? can a mechanical engineer work in a mine?
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How is sap useful to mechanical engineer
Arun
- Oct 16th, 2011
Its a powerful ERP software used for any phase of any indstry
jronak123
- May 27th, 2008
As a mechanical engineer point of view SAP is not useful much but i m in suzlon & i use SAP For drawing find from around 1000 parts by appprox time 1 minute , than clear GR (GOOD RECEIPT) By ...
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Suppose there is a weighing balance.In one hand of weighing balance there is weight of 1 KG which is perfectly balancing flask full of water which is on the other hand. Now if i immerse finger in water, will the equillibrium be disturbed?
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Editorial / Best Answer
Stercus- Member Since Dec-2007 | Aug 18th, 2009
Akash, your FBD won’t work if you leave off external contacts – they need to be converted to force arrows. The buoyed object provides one such force: the buoyant reaction force.
You seem to agree that there is a force acting upwards on the test tube, appearing on the spring balance acting against the weight. As the test tube and the bowl of water are stationary, not accelerating, there must be an equivalent reaction force acting downwards on the body of water, imparted by the object. To go into more detail, the surface of the object experiences a pressure distribution from the water, gradated downwards due to increasing pressure within the water body. The net result from the pressure distribution is that the water pushes up on the object (buoyant force). To avoid being crushed, the object pushes back against this pressure in all directions – so again you get net a reaction force in the opposite direction, downwards.
So the FBD of the water body needs a reaction force to account for buoyancy. This reaction force acts downwards, from the centre of the displaced volume and is equal to the weight of the water displaced. The weight of the object immersed doesn’t need to be considered as this is supported but the weight of the displaced volume of water does.PRASHANT
- Oct 16th, 2011
It will not change the reading..... Lets take a simple case... A water flask is putted on a weight balance and a rod is immersed in it which is tied to ceiling with help of a rope. The tension in the...
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Labyrinth Sseal
List different types of Labyrinth Seals How to measure Labyrinth Seal Clearrence?What is the allowable clearence?
Lokesh M
- Dec 8th, 2011
Different Types of Labyrinth Seal are as follows: Axial Labyrinth Seal Radial Labyrinth Seal Low Cost Labyrinth Seal Bearing Shield Labyrinth Seal Nilos Ring (AV) Labyrinth Seal Nilos Ring (JV) Labyr...
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How to calculate the capacity of a machine using formula?
hrs7400
- Dec 19th, 2011
The capacity of a machine can be calculated by simply measuring the Output from a adesier Input in terms of %efficiency
Capacity =Output/inputrahul
- Dec 16th, 2011
Just multiply work done by machine into time taken.
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Which one is more efficient? A four stroke engine or a two stroke and why?
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Answered by: padmaja
- Oct 5th, 2006
although four stroke engine is more frequently used 2STROKE engine is more effiecient because for every 2 strokes there is a power stroke.for same power generation 2STROKE ENGINE is compact
hrs7400
- Dec 19th, 2011
2 stock engine is more efficient than 4 strock, because Power generation for 2 strock required one strock of compression and one strock of discahrge, while for the same power a 4 strock engine require...
Pradeep sharma
- Nov 25th, 2011
4 stroke is more efficient due 2 its better milage, less wear & tear of parts, contain valves prevent frm leakage, deliver one power stroke in 4 cyle.
But in case of power, 2 stroke is better. it delivered 1 .8 times more power than 4 stroke.
Bt overall view favoured to 4 stroke engine. -
Why transmission power is rated in multiple of eleven ?
rameez.ajmeri
- Jan 13th, 2012
Hello sargkuna, I would like to correct your answer. In fact there are two reasons, the form factor of power generating alternator is 1.11 due to which the transmission voltage is made in multiples ...
sargkuna
- Jul 26th, 2011
The reason is some thing historical. In olden days when the electricity becomes popular, the people had a misconception that in the transmission line there would be a voltage loss of around 10%. So in...
Mechanical Engineering Interview Questions
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