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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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Carburettor Acclerating Condition
In zenieth carburettor, at acclerating condition how does the air screw operates?
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Watertable Height
When ship reaches shipyard what is the water table height? Wheather it will increase or decrease?
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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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Suspended Roof Tanks
When and under which condition a "suspended roof tank" is used? Why we use suspended roof storage tanks for propane and butane (LPG) storage?
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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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Thermal Efficiency
Why the thermal efficiency of the engine decreases at part load?
kanthasami
- Jul 26th, 2009
There are always some mechanical losses in the engine while running. These losses are more or less same at all the speeds. When the speed decreases, the output will obviously decreases. But, the losses remain same. So, the overall efficiency also decrease.
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Gear Shifting Technique
In two wheeler the first gear are engaged in front shifting and remaining are engaged by back shifting of gear pedal, Why?
rakesh8014
- Jul 5th, 2010
It depends on design of gear box. It is not only 1st gear downward and others are upward always, it may be all gears towards down or towards up. The movement of gear lever engage different gears set of gears in different combination to get the required output.
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Strength of Oval Pipes
Why is the strength of oval pipes more than that with circular cross-section?
sunnyzafar
- Jul 4th, 2010
It is bcoz the value of section modulus of an ellipse is more than than of a circle. Hence using bending eqn, we can see that strength of oval pipe is more than circular pipe.
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Supercharging
What is mean by supercharging? How supercharging works in automobile?
sandeepfunky
- Jul 2nd, 2010
Super charging is a process in which compressed air is sent in to the engine cylinder, this is basically to increase the efficency of the engine, found mainly in diesel engines. The atmospheric air is...
sunil vishwakarma
- Jul 2nd, 2010
It is done to improve power obtained from engine. Idea behind it is that it could be done by increasing mass flow rate in engine cylinder, for that at initial stage dendity of charge is increase...
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