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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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Petrol Engine
What happen if we pour petrol in diesel engine and vice versa? Explain
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richa tiwari- Member Since Aug-2009 | Aug 30th, 2009
When petrol is used in diesel engine, the engine will not work as gasoline (petrol) has high ignition temperature and therefore has to be ignited by spark-ignition. Diesel engine on the other hand works on the principal of self-ignition in compressed fuel?which?is not possible with petrol.
When diesel is used in petrol engine, there will be sudden combustion in the fuel due to spark ignition? bcoz diesel has low ignition temperature. This will lead to high knocking, which is absolutely undesirable.kamlesh431
- Jul 24th, 2014
The compression ratio of petrol engine is 10:1 to 14:1 and for diesel engine is 16:1 to 22:1. If petrol is poured in diesel engine a blast may happen at this high compression ratio. So we cant use pe...
richa tiwari
- Aug 30th, 2009
When petrol is used in diesel engine, the engine will not work as gasoline (petrol) has high ignition temperature and therefore has to be ignited by spark-ignition. Diesel engine on the other hand wo...
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Ss 316 specification of hardness
how many 5 m dia hardness in bhn of 316 material we are facing the problem in machining & tolling not work properly
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Sigma comperator optical systems
Explain about calibration method of sigma comparator optical systems ?
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Black Tyres
Why tyres are ever made black?
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bhargavmech- Member Since Jul-2009 | Aug 6th, 2009
When Tyres are parked for extended periods, tires dry out, discolor and eventually crack and split. The major factor degrading tires and other synthetic and rubber products is ozone, an odorless gas which is part of the air we breath. When combined with ultraviolet light (the invisible part of sunlight) a reaction occurs that attacks the tire polymer. To protect against ozone and UV damage, a stabilizer molecule called a “competitive absorber” is blended with the tire polymer. Competitive absorbers work by capturing and absorbing UV radiation and converting it to heat which is dissipated harmlessly. All tire manufacturers use the same competitive absorber, carbon black. This is why all tires are black
bhargavmech
- Aug 6th, 2009
When Tyres are parked for extended periods, tires dry out, discolor and eventually crack and split. The major factor degrading tires and other synthetic and rubber products is ozone, an odorless gas w...
Mechanical Engineering Interview Questions
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