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Explain the working principle, Surface finish, material removal, accuracy,advantages and application of Electrochemical Grinding(ECG).
(a) In electro chemical machining of pure iron a material removal rate of 600mm3/min is required. Estimate current required.
Atomatic weight of iron Afe = 56
Density = 7.8gm/cc 10
b) Composition of Nickel super alloy is as follows:
Ni= 70%, Cr=20% , Fe = 5% and rest titanium . Determine ratye of dissoulation if the area of the tool is 1500mm2. and a current is 2000 A is being passed through the cell. Assume dissolution to take place at lowest valency of the element.
Ani = 58.71 ρni=8.9 VNi=2Acr = 51.99 ρcr=7.19 Vcr=2Afe = 55.85 ρfe=7.86 Vfe=2Ati = 47.90 ρti=4.51 Vti=3
We can use Ampere's Law to calculate the magnetic field in the core.
The resistance of a wire is 60 ? at 25 o C and 65? at 75 o C. Find the resistance of wire at 0 o C and value of temperature co-efficient at 0 o C. Ans: Given R 25 = 60 ? a
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Atomic weight of an atom is (A) Sum of the number of protons and neutrons. (B) Sum of the number of protons and electrons. (C) Sum of the number of electrons and n
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