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| Question |
Why same casting has different hardness and machineability
properties? One spot it is found hard for machining and
another spot soft? It is FG 260 grade for Cast Iron. |
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Answer Posted By |
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Question Submitted By :: Dhan |
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I also faced this Question!! |
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| Answer | If it is a free flow single gate single runner casting then
the density variation leads to the diffrence in properties
across various sections. To get uniform density variation
usually pressure flow multigate multirunner castings are
preferred.  |
| Anil Kamat
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| Question |
what are the ores of copper? |
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Answer Posted By |
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Question Submitted By :: Guest |
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| Answer | 1chalcopyirite
2cuporite
3limonite |
| Guest
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| Answer | oxide ore:
chalcopyrite
chalcocite
bornite
sulphide ore
malachite
azurite
cuprite |
| Vish
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| Answer | sulphide ore:
chalcopyrite
chalcocite
bornite
oxide ore
malachite
azurite
cuprite |
| Guest
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| Question |
What metal would be better suited for heat transfer,
reliability, and cost...??? I'm currently using Aluminum
for a 'hot-wedge'. |
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Answer Posted By |
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Question Submitted By :: Trey |
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| Answer | copper |
| Hardik
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| Answer | for high rate of heat transfer and closed enclosure parts ,
copper would be best suited for reliability, heat transfer
and slight high cost than alluminium but fo parts where the
heat transfer rate is low and the parts have sufficient
space for heat to dissipate , alluminium is suitable.
Silver can also be used but it would make it a costly
proposition. |
| Anil Kamat
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| Question |
what happens when a EM wave is transmitted |
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Answer Posted By |
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Question Submitted By :: Guest |
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| Answer | It is absorbed and reflected |
| Guest
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| Question |
what is the cause of attenuation due to powerloss |
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Question Submitted By :: Guest |
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| Answer | It is due to the finite conductivity in the conductor |
| Guest
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| Question |
What are the superalloys used for? |
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Answer Posted By |
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Question Submitted By :: Guest |
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I also faced this Question!! |
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| Answer | superalloys are used in components for high temperature
applications .They have high temperature strength,
corrosion and oxidation resistance. |
| Well Wisher
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| Question |
What are the superalloys? |
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Answer Posted By |
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Question Submitted By :: Guest |
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| Answer | superalloys are use for high temp.application. |
| Yesm
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| Answer | superalloys is an alloy that exhibits excellent mechanical
strength and creep resistance at high temperatures, good
surface . |
| Laxmi
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| Question |
Why is non-destructive testing necessary? |
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Answer Posted By |
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Question Submitted By :: Guest |
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| Answer | if the no of components are limited we cant afford to
destroy it so NDT is used |
| Swathi
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| Question |
What kinds of NDT methods are available? |
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Answer Posted By |
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Question Submitted By :: Guest |
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| Answer | x ray testing,ultrasonic testing,magnrtic resonance testing
etc |
| Srinath
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| Answer | RADIATION TESTING, ULTRA SONIC TESTING, MAGNETIC PARTICLE
TESTING AND DIE PENETRANT TESTING etc... |
| Althaf Hussain
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| Answer | Visual, liquid penetrant, magnetic particle inspections,
and untrosonic testing, eddy current testing, Radiographic
testing, acoustic emission, Thermography, replica
metallography. |
| Kmari
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| Answer | Two basic NDT test are Sound Test and Pressure Test. Sound
test has been used even by a common man in his day to day
life while purchasing a POT or any porcelein items.
Similarly pressure test also used by common man in his day
today life. Example to notice a small puncture in a two
wheeler. |
| S.malayappan
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| Answer | 1.Visual Inspection
2.Microscopy
3.Radiography
4.Dye Penetrate
5.Ultrasonic
6.Magnetic Particle
7.Eddy Current
8.Acoustic Emission |
| Ashish Bansal
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