Mechanical Engineering - Strength of Materials

26. 

When a rectangular beam is loaded transversely, the maximum tensile stress is developed on the

A. top layer
B. bottom layer
C. neutral axis
D. every cross-section

Answer: Option A

Explanation:

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27. 

The compressive strength of brittle materials is __________ its tensile strength.

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

Answer: Option C

Explanation:

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28. 

When a closely-coiied helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring (δ) is given by (where d = Diameter of spring wire, n = No. of turns of the spring, and C = Modulus of rigidity for the spring material)

A.
B.
C.
D.

Answer: Option D

Explanation:

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29. 

In spring balances, the spring is used

A. to apply forces
B. to measure forces
C. to absorb shocks
D. to store strain energy

Answer: Option B

Explanation:

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30. 

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 both ends fixed is 4.

A. Agree
B. Disagree

Answer: Option B

Explanation:

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