# Mechanical Engineering - Strength of Materials

### Exercise :: Strength of Materials - Section 8

1.

A pressure vessel is said to be a thin shell when the ratio of wall thickness of the vessel to its diameter is __________ 1/10.

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

Explanation:

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2.

According to Euler's column theory, the crippling load of a column is given by p = π2 EI/Cl2. In the Euler's formula, the value of C for a column with one end fixed and the other end hinged, is 1/2.

 A. True B. False

Explanation:

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3.

A tensile test is performed on a mild steel round bar. Its diameter after fracture will

 A. remain same B. increase C. decrease D. depend upon rate of loading

Explanation:

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4.

Two closely coiled helical springs 'A' and 'B' are equal in all respects but the diameter of wire of spring 'A' is double that of spring 'B' The stiffness of spring 'B' will be __________ that of spring 'A'

 A. one-sixteenth B. one-eighth C. one-fourth D. one-half

Explanation:

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5.

When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by

 A. B. C. D. 