Process Equipment and Plant Design
A cylindrical storage tank can have a self supported conical roof,

If its diameter is less than 15-20metres
Irrespective of its diameter
If the thickness of the roof is more than that of the cylindrical shell
If its diameter is more than 50 meters

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than __________ of the head.

Either A or B, whichever is smaller
3 times the thickness
Either A or B, whichever is larger
6% of I.D.

ANSWER DOWNLOAD EXAMIANS APP