The most preferred process for casting gas turbine blades is
A. Die casting
B. Shell moulding
C. Investment moulding
D. Sand casting
Answer: Option B
Solution(By Examveda Team)
Shell moulding is an expendable mold casting process that uses a resin covered sand to form the mold.The most preferred process for casting gas turbine blades is shell moulding.
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its wrong ,gas turbine blades are made up from investment casting
correct it ASAP
Ans is D
This Question was asked in IES 1992 , And the Answer is Only Investment Casting.
If you need the explanation, Investment Casting has an tolerance of plus or minus 0.005 where as for Shell moulding it is plus or minus 0.02.