1.The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; this stress is called

2.A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as

3.Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunished plate in

4.A cylindrical section having no joint is known as

5.A riveted joint in which the number otrivets decrease from innermost to outer most row is called