In case of plain carbon steel, butt welded joints are used for shell plate thickness ≤ _____________ cms?

A. 5 cms
B. 40% of the I.D. of the shell
C. 25 cms
D. I.D. of the shell

A. Hold baffle in space
B. Fix the tubes in position
C. Account for thermal strain
D. None of these

A. Modulus of elasticity
B. Modulus of rigidity
C. Bulk modulus
D. None of these

A. Withstand higher pressure for a given metallic shell thickness
B. Be fabricated very easily
C. Be designed without wind load considerations
D. Be supported very easily

A. 5
B. 15
C. 7.5
D. 50

A. 2 to 3
B. 3 to 5
C. 4 to 8
D. 6 to 12