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Bearing Clearances
How can we measure the industrial bearing clearances?
deepakargowda
- Apr 30th, 2010
We can measure bearing clearance with an outside micrometer and a dial bore gauge. We can also use plastiguage to measure the clearance.
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What qualities do you think you can bring to mechanical engineering?
karthicvijay
- Apr 30th, 2010
1. Dont work hard but work smart.2. Bring out new innoviative ideas and share it with the world.3. Thinking different from others.4. Thirst for improvements.5. Always being sensitive.
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What is the meaning of refrigerant R21?
vrsaikumar
- Nov 4th, 2008
Dichlorofluoromethane or Freon 21 or R 21 is a halomethane or hydrochlorofluorocarbon. It is a colorless and odorless gas. Its critical point is at 178.5 ?C (451.7 K) and 517 MPa (51.7 bar). At tempe...
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Surging and Choking
What is Surging and Choking?
r.mech
- May 8th, 2010
Due to increse of load on the compressor, mass flow rate is decresed. It would again tend to increase the mass flow rate. This unsteady to and fro motion of the fluid will cause pulsation in the compr...
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Thermal Power Plant
In a thermal power plant which main fuel is heavy crude (Fuel: Arabic Heavy Crude - AHC)?
What is the job responsibility of Local Fuel Operator? -
Hydraulic Devices
What is an Hydraulic Device?
puneetrawat
- May 15th, 2010
Hydraullic devices are those which has oil as the working medium like hydraullic pumps.
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Gravitational Constant
The value of gravitational constant below see level at 4500m depth was found to be 9.8295m/s2 and this is maximum after that it decreases...What would be the value of the acceleration due to gravitation at the center of earth?
saurav_sammy
- Jun 20th, 2010
the gravitation constant again decreases as we go down the 4500m level below the sea level....
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Maximum Torque Produced
What is the meaning of maximum torque produced at a specified RPM?
sandeepfunky
- Jul 2nd, 2010
Torque can be defined as the energy used to rotate the body on its own axis. RPM is revolutions per minute. so the maximum torque attained in a particular RPM is the amount of force obtained to rotate a body attached to a fixed point.
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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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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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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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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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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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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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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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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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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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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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Fluid Mechanics
When a wet ball is thrown to ground it has more velocity after it hits ground than at throwing. Explain Why?
Mechanical Engineering Interview Questions
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