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Si/Ci Engine
Why we do not use same technology to start both si/ci engine
ansi9164
- Aug 23rd, 2010
Self ignition temp of petrol in higher then diesel so it requires much pressure for self ignition as compared to diesel, due to this reason CI is not
favorable in case of petrol engine.rakesh_ms
- Aug 20th, 2010
The properties of both these fuels i.e., gasoline and diesel are different, Gasoline is less flamable than diesel.
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Bearing Size
How to find the beraing number or bearing size?
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How vehicle accelerator works
How is speed of any vehicle is increased by pressing the accelerator and decrease by relesing ?
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2 Wheeler Reverse Gear
Four wheelers are provided reverse gear whereas two wheeler are not provided, Why?
Pradeep Manickam
- Mar 27th, 2011
Its because two wheeler can be easily moved by a force whereas car can not be easily moved by our force.hence a reverse gear is required
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Bicycle Reverse Pedal
Why bicycle does not go backward after reversing the pedal?
abhi11092451
- Feb 28th, 2011
when we rotate the paddle of a bicycle in the forward direction ,the chain moves the axle which eventually moves the back wheel.but when it is rotated backward the chain does move while the axle does ...
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Human Body
When a man falls in a sea the human body gets sink in water, after the the man consume much water and die, the body floats in water surface. Why the body sunk? and Why the body floats at last?
ao103
- Jan 26th, 2011
As bacteria start to work and decompose the bodies internal tissue - gas builds up which reduces overall denisty of the body - so the body floats. If you got proper swimming lessons, the body actual...
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Toyota Vigo D4D Technology
What is D4D Technology used in Toyota Vigo?
dattamani
- Jan 23rd, 2011
D-4D is widely recognised as one of the most advanced diesel technologies on the market today. Diesel engines relied on relatively simple technology with a low-pressure mechanical injector delivering...
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Induction Motor Advantage
What is the advantage of induction motor?
sawantrakesh
- Dec 29th, 2010
1} Smaller in size.2} Light in weight.3} Less maintenance cost.4} Easy to repair.5} Less sparking produced.6} It is carbonless.
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Centrifugel Pump
How does centrifugel pump designer calculate the capacity of pump & discharge head size.
sudeeb
- Dec 20th, 2010
Power for a centrifugal pump = ?flow(M3/hr) x S.G x head(m) x density x g /(1000 x 3600 x 0.745 x pump efficiency )Head developed will depend only on the diameter of the impeller. ?Head and flow is ...
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Archimedes' Principle
According to Archimedes principle, mass of an object in water would be less than mass of an object in air.So imagine an object of 5 kg and weight of a vessel containing water as 100 kg. The total weight is 105 kg. Now place a weighing machine under the water vessel and immerse the object into the water. Now can I except the weighing machine shows the weight less than 105 kg?
sudeeb
- Dec 20th, 2010
Acc to A.P -- Weight of the water displaced is equal to the weight of the body. So the weighing scale indicate the same weight 105 kg. ?but when we lift the body we will feel low weight due to the upward?bouncy?force. and body float/sink depend upon the bouncy force and metacentre.?
prashanthsekar
- Feb 19th, 2010
Firstly the question Cannot be directly related to Archimedes Principle, As the principle states that when an Body is immersed in water, The amount of water displaced by the body is equal to the weigh...
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Heat Exchanger
What is heat exchanger? What is the use of it?
aliwaqas
- Dec 19th, 2010
A heat exchanger (HX) is a mechanical equipment used for exchanging heat, e.g. between two mediums i.e fluids.Its classified in two groups;1. Direct Contact HX2. Indirect Contact HXDirect Contact HX i...
rakesh8014
- Nov 24th, 2010
heat exchanger is a device or arrangement used for heat dissipation of heat from a certain part where excess heat may be harmful to the system,heat exchanger increase the heat dissipation by simply in...
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Axial and Thrust Bearings
What is the difference between axial and thrust bearings?
franksma
- Nov 18th, 2010
Both are same, when a shaft is rotating there will be two loads. One is radial load and another is axial or thrust load.Inorder to keep the shaft in exact location of rotation, we require Radial and A...
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Vibro Motors
Two electrically operated Vibro Motors are fixed in parallel direction in vibrating feeder. What is the direction of both Vibro Motors?
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Fluid Mechanics
When a wet ball is thrown to ground it has more velocity after it hits ground than at throwing. Explain Why?
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PGM FI Technology
What is PGM FI technology used in honda stunner bike?
Ranveer Upadhyay
- Oct 8th, 2010
The development of an ECU-integrated throttle body module for an electronic fuel injection system for small motorcycles ...
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Mechanical Seal
How many types of machanical seals are available? What materials are used to make it?
sudeeb
- Sep 26th, 2010
Mainly mech seals can be classified into single, double. m.o.c is carbon, silicon carbide, PTFE, etc.
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Railway Engine Motor
What motor do they use in railway engines for traction?
hemalshah94
- Aug 27th, 2010
In Local memu train, series motor is used bec?it? requires high torque?initially?e.g. Anand Memu, Vadodara memuIn Express train, I.M motor or Shunt motor is used bec. it requires high torque as well as constant speed e.g Ashram Express
bhargavmech
- Jul 28th, 2009
Traction motors used to drive trains are series motors that provide the required torque and horsepower to get massive amounts of weight moving
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Disc Brake
How does disc brake work?
sanjaymanral
- Aug 16th, 2010
It is based on Pascal Law. When we apply brakes fluid inside the pipe maked its way downwards & at that time valve closes. This creates the pressure which is transmitted to the brake shoe & consequently it contracts that hold the tyre at its place.?
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Boiler Efficiency
How can we increase the efficiency of boiler?
deemech
- Jul 11th, 2010
Boiler efficency can be increased by incresing the boiler pressure or by the reheating the steam or by the process of regeneration. Another method is that by increasing the mean temperature of heat addition so that boiler efficiency can be inceased.
shammi
- Jun 8th, 2010
The main problem which derease the efficiency of boiler are caused by hard water. So the best method to increase the efficiency is to use hardness free water and for that water should be treated properly.
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