Engineering :: Strength of Materials

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251.

A thick pressure vessel is always used for the generation of steam, as it can withstand high pressures.

True

False

252.

If the diameter of pressure vessel is 15 times the wall thickness, the vessel is said to be a thick shell.

Agree

Disagree

253.

A thin cylindrical shell of diameter (d), length (l) and thickness (t) is subjected to an internal pressure (p). The hoop stress in the shell is

A.	pd / t	B.	pd / 2t
C.	pd / 4t	D.	pd / 6t

254.

A thin cylindrical shell of diameter (d) length (l) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is

A.	pd / t	B.	pd / 2t
C.	pd / 4t	D.	pd / 6t

255.

In a thin cylindrical shell subjected to an internal pressure p, the ratio of longitudinal stress to the hoop stress is

A.	1 ? 2	B.	3 ? 4
C.	1	D.	1.5

256.

The design of thin cylindrical shells is based on

A.	hoop stress	B.	longitudinal stress
C.	arithmetic mean of the hoop and the longitudinal stress	D.	geometric mean of the hoop and longitudinal stress

257.

The hoop stress in a thin cylindrical shell is

A.	longitudinal stress	B.	compressive stress
C.	radial stress	D.	circumferential tensile stress

258.

When a thin cylindrical shell is subjected to an internal pressure, there will be

A.	a decrease in diameter and length of the shell	B.	an increase in diameter and decrease in length of the shell
C.	a decrease in diameter and increase in length of the shell	D.	an increase in diameter and length of the shell

259.

The thickness of a thin cylindrical shell with hemispherical ends is

A.	equal to	B.	more than
C.	less than

260.

The hoop stress in a thick cylindrical shell is maximum at the inner radius.

True

False