34) when a bar of length l, width b and thickness t is subjected to a push of P, its

Answer is:

length decreases, width and thickness increase

Strength of Materials MCQ with Answers

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35) The volumetric strain is the ratio of the

Answer is:

change in volume to the original volume

Explanation:

The ratio of change in volume to the original volume is known as volumetric strain.

36) When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as

Answer is:

bulk modulus

Explanation:

When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as bulk modulus. Bulk Modulus is usually denoted by K.

37) Which of the following statement is wrong?

The deformation of the bar per unit length in the direction of the force is called linear strain.

the Poisson's ratio is the ratio of lateral strain to the linear strain.

The ratio of change in volume to the original volume is called volumetric strain.

The bulk modulus is the ratio of linear stress to the linear strain.

Answer is:

The bulk modulus is the ratio of linear stress to the linear strain.

Explanation:

When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as bulk modulus. Bulk Modulus is usually denoted by K.