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Stroboscope
stroboscope is used for measuring1. rpm of the spur gear2. temperature calibration3. velocity of the reciprocating engine4. all the above5. None of the above
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santoshmit- Member Since Dec-2007 | Dec 26th, 2007
used to measure rpm,more importantly to monitor the condition of a high speed rotatating m/c
Sudharshan Ganesh
- Jul 9th, 2011
It is a device that has a flickering light..the light flickering intervals are know and a mark is made on the shaft whose rpm is to be measured..as the mark interrupts the light and based on the calculations the rpm is determined.
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If the HR asks me "Being mechanical engineer why you want to the IT industry. Please give me answers as i am going to attend campus interview in few days.
pranee.raj
- Dec 22nd, 2009
The knowledge of an IT guy is used only by an educated one but the knowledge of a Mechanical engineer is used even by an uneducated [For Example: Farmers], this itself proves the scope of mechanical, ...
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What are types of principal stresses?
mailmisterk
- Dec 11th, 2008
A plane in which no shear stress acts is said to be principal plane. The only stresses acts on that plane are principal stresses. Normally, there are two types of principal stresses, maximum and minimum principal stresses.
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I have a thermal flask in which i have to fill the boiled water. I also have thermocol, saw dust and silver paper. Now tell me how i have to arrange these material to attain minimum heat loss.
kiranaimhigh
- Jun 30th, 2011
We need a material which has got lowest thermal conductance inside, which is in contact with the boiled water..so from inside first come silver paper, thermocol sawdust.
rashi shrivastava
- Aug 20th, 2010
The materials shall be placed in increasing order of their convective heat
transfer coefficient viz thermocol, saw dust, and then steel, which has the
highest heat transfer coefficient.
Please tell me if i am wrong.
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What does the unit "psi" represent?
Nidhin Chandran
- May 12th, 2011
Psi stands for pounds force per square inch and is a British unit commonly seen on pressure gauges
raja
- Sep 26th, 2007
PSI is a short form of Pounds Per Sqare Inch. it is the amount of pressure in pounds acting in a square inch of area.
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Water Energy
Water contains H2O, the hydrogen and oxygen present in the water can be used as fuel for the ic engine is it possible? then why it is not implemented nowadays.
Nimmala Goud
- May 25th, 2011
HI one n all.the project value for increasing efficiency of an engine using water as substitute of fuel is not the factor of revealing this technology, beside that's wonderful project n eco-friendly t...
halleybryanv
- Jan 5th, 2011
The equipment use for extracting hydrogen from water is too expensive this time. It is not economical to use it nowadays.
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Priming
What is Priming?
kit_inton
- Jun 19th, 2011
Is process by removing?air that?trap inside pump casing or at suction pipe, before filling a process liquid, open or remove the valve for air bleeding?until you can't see any bubbles.?
sudeeb
- Dec 20th, 2010
Priming is the process of filling water in centrifugal pump suction strainer to casing upto the delivery valve or priming point. It will remove the air from the suction side of the pump. In centrifug...
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Boilers
What is fusible plug? Why it is used?
ntnkumar
- Apr 15th, 2010
Fusible plug is used as a accessory in boilers. It is used for the proper working of boilers.It is a safety device which shuts off the working of the boiler when the temp. of boiler is very large and the boiler burst.
karmesh
- Mar 29th, 2010
It is used in the boiler to save it from brusting when water level is low from a fixed point
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Fluid Mechanics
What happens when water flowing through pipe is suddenly cut?
kiranaimhigh
- Jun 30th, 2011
If a pipe is of 1000 Mts in length and water is flowing through it..when the pipe is not cut..water will flow through out the 1000 Mts.. but when is it cut at around 500 Mts, the resistance offered to...
mohsinali
- Feb 14th, 2010
When water flows from pipe it does have constrained motion & when supply is being cut suddenly, water particle tends to continue its motion but it doesn't so. Therefore the pressure wave is been g...
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Bearings and Rivets
What are different types of bearings? What are different types of rivets?
Faheem Zaman
- May 14th, 2011
Journal and anti friction bearing r the? two general type of bearing.journal bearing operates with sliding contact ,where as anti friction bearing operates under predominantly rolling contact.and there r two types of rivet joints ,these r tabular rivets and blind rivets.
Nidhin Chandran
- May 12th, 2011
you people have answered to the question "what are the different types of riveted joints?"But here the answer is sought for the different types of rivets which are as follows(they are from w...
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Power Transmission
What alternatives can be used in automobile instead of differentials for power transmission?
neeraj580
- Aug 26th, 2010
Differential is used because while turning the velocity of inner and outer wheel are differnt so if we do not use differntial skidding can take place, alternative for differntial is to power just one of the wheel in the axle.
S.KALAIYARASAN
- Apr 21st, 2009
Generally the engine power transmitted to the differential through propeller shaft. Then the differential transmit the power to the rear wheels.Instead of that, we can go for hydraulic drive. That is ...
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Weight and Mass
Differentiate Weight and Mass
arun govind neelan
- Dec 24th, 2009
Mass is used to measure the quantity. Unit is kgWeight is a force = mass * 9.81
ronit_hansum
- Feb 16th, 2009
Mass is a fixed quantity. It remains the same anywhere on earth or moon. But weight is the force with which earth attracts everybody. Weight depends on the position of body on the surface or earth. ...
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Kinematic Viscosity and Dynamic Viscosity
Difference between kinematic viscosity and dynamic viscosity and discuss the units in S.I and C.G.S system.
sahoo_nda
- Jul 18th, 2009
Dynamic viscosity is a measure of a fluid's resistance to shear flow. Kinematic viscosity is a ratio of the dynamic viscosity and density of a fluid,Kinematic is related to the cross section of ...
anuragdhupiya
- Mar 15th, 2009
Kinematic viscocity is the ratio of dynamic viscocity?to density of the fluid.
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VVTi
What VVTi written on new cars of Toyota stands for?
Chandimal
- Jan 8th, 2010
VVTi stands for Variable Valve Timing with Intelligence. Its a system which?improves?performance and efficiency of the engine. Mostly fitted with Toyota's.
sharu46
- Dec 30th, 2009
VVTi : Variable Valve Timing with Inteligence. It is the advanced version of the VVT engine. It changes the cam shaft position by using oil pressure. It is simmilar to CVVT in Hyundai.
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Lathe
How a lathe can be specified?
Gambit
- Sep 11th, 2009
Lathe can be specified in no. of ways:* Swing over bed (max. dia. of workpiece over the bed)* Swing over carriage* Distance between the headstock and tailstock* Bed height and Bed width* Shipping weight of lathe* Max. spindle speed etc.
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Jokey Pump
What is the function of jokey pump?
kit_inton
- Jun 19th, 2011
The? function of jokey pump is to maintain the pressure in pipe line,?pressure switch set at hi/lo?to start the jokey?pump motor, in case the pressure drop that jokey pump can't build up the pressure, then the main pump automatically start.
vasujoshi123
- Feb 11th, 2009
Jockey pump is working to keep fire hydrant system in pressurised condition always.If any pressure decreases in the system, automatically hydrant pump starts immediately to cope up the required pressure or supplying the required water to the required area.
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Boiler Feed Pumps
Why are the stages being provided in Boiler Feed Pump?
kit_inton
- Jun 19th, 2011
Boiler feed pump stages deliver high discharge pressure from pump to overcome the pressure inside the boiler drum and pressure losses from pipe connections, and also friction loss.
sudeeb
- Dec 20th, 2010
Boiler feed pump is a multi-stage centrifugal pump where no of impellers more than one usually >3 . Depending upon the boiler working pressure pump will select. The pump should have high positive suction to avoid cavitation, usually take more than 10m. feed water temperature will be more than>65'C.
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What is a Black Box in an Airplane ?
Saurabh Lalwani
- Jun 9th, 2011
It is basically a storage of some recorded conversations and radio communications which is used for accident investigations, as well as for analysing air safety issues, material degradation and aircraft performance.
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Automobile Differential
How does automobile differential work?
Vatsal Naik
- Jun 4th, 2011
A vehicle's wheels rotate at different speeds, mainly when turning corners. The differential is designed to drive a pair of wheels while allowing them to rotate at different speeds.without diffe...
ajmeri.morvi
- May 20th, 2011
actually it will better understood by animation or actual model?in?which?driving shaft torque/power are transmitted to driven shaft (wheel shaft) (note:both wheel have different shaft it has no dir...
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What are anti friction bearing ?what is different between ball bearing and roller bearing?
ajmeri.morvi
- May 19th, 2011
a bearing which have line or point contact between two individual rotating case (named inner case and outer case) that's why lower the friction generate so it is called the anti friction bearing.ball ...
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