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UPSC Civil Service Exam Questions - Engineering

Q1:

A seamless pipe with 80 cm diameter carries a fluid under a pressure of 2 N/mm2. If the permissible tensile stress is 100 N/mm2, the minimum required thickness of the pipe is

A 2 mm

B 4 mm

C 8 mm

D 16 mm

ANS:C - 8 mm

Hoop stress = Pd/2t.