A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be_________________?
A. 30 MN/m2
B. 50 MN/m2
C. 100 MN/m2
D. 200 MN/m2
E. 300 MN/m2
A. 30 MN/m2
B. 50 MN/m2
C. 100 MN/m2
D. 200 MN/m2
E. 300 MN/m2
A. introduce internal stresses
B. balance the other forces acting on it
C. retard its motion
D. change its motion
E. all of the above
A. mechanical advantage is greater than velocity ratio
B. mechanical advantage is equal to velocity ratio
C. mechanical advantage is less than velocity ratio
D. mechanical advantage is unity
E. none of the above
A. considerably greater than that necessary to continue it
B. considerably lesser than that necessary to continue it
C. greater than that necessary to stop it
D. lesser than that necessary to stop it
E. equal to that necessary to stop it
A. slenderness ratio and area of cross-section
B. Poisson’s ratio and modulus of elasticity
C. slenderness ratio and modulus of elasticity
D. slenderness ratio, area of cross-section and modulus of elasticity
E. Poisson’s ratio and slenderness ratio
A. jointless section
B. homogeneous section
C. perfect section
D. manufactured section
E. seamless section
A. 50%
B. 25%
C. 0%
D. 15%
E. 60%.