Strength Of Materials In Me - Study Mode

[#186] A lap joint is always in _________ shear.
Correct Answer

(C) Both A and B

Explanation

Solution: A lap joint can experience both single and double shear. In a single shear lap joint , the forces act in a single plane, and the joint is subjected to shear along one plane only. In a double shear lap joint , the forces are distributed over two planes, effectively reducing the shear stress in each plane. Therefore, the correct answer is Option C: Both A and B .

[#187] A pressure vessel is said to be a thin shell when the ratio of wall thickness of the vessel to its diameter is __________ $$frac{1}{{10}}.$$
Correct Answer

(B) Less than

[#188] A simply supported beam with a gradually varying load from zero at ‘B’ and ‘w’ per unit length at ‘A’ is shown in the below figure. The shear force at ‘B’ is equal to
Correct Answer

(A) $$frac{{{ ext{w}}l}}{6}$$

Explanation

Solution:

[#189] The columns whose slenderness ratio is less than 80, are known as
Correct Answer

(A) Short columns

Explanation

Solution: * Slenderness Ratio: This is a way to measure how likely a column is to buckle (bend sideways) under a load. It's calculated by dividing the column's effective length by its least radius of gyration. * Short Columns: These are columns that are relatively stocky. They tend to fail due to crushing (the material being squeezed) rather than buckling. * Long Columns: These are columns that are relatively slender. They are more likely to buckle under load. * Medium Columns: These columns behaviour lies between short and long columns. * General Rule: A common rule of thumb is that columns with a slenderness ratio less than 80 are generally classified as short columns . They primarily fail due to compressive stresses exceeding the material's yield strength. * Weak Columns: This term isn't directly related to slenderness ratio in the same defining way as short or long columns. A weak column could be weak due to material properties or manufacturing defects, regardless of its slenderness ratio. Therefore, a slenderness ratio less than 80 indicates a short column that's prone to crushing rather than buckling.

[#190] When a bar of length l, width b and thickness t is subjected to a pull of P, its
Correct Answer

(C) Length increases, width and thickness decreases