Strength Of Materials In Me - Practice Test

[#266] When a body is subjected to a direct tensile stress ($$sigma $$) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle $$ heta $$ to the normal of the section is

(A) $$sigma sin 2 heta $$

(B) $$sigma cos 2 heta $$

(C) $$frac{sigma }{2}sin 2 heta $$

(D) $$frac{sigma }{2}cos 2 heta $$

Correct Answer

(C) $$frac{sigma }{2}sin 2 heta $$

[#267] When a body is subjected to a direct tensile stress ($$sigma $$) in one plane, then normal stress on an oblique section of the body inclined at an angle $$ heta $$ to the normal of the section is

(A) $$sigma cos heta $$

(B) $$sigma {cos ^2} heta $$

(C) $$sigma sin heta $$

(D) $$sigma {sin ^2} heta $$

Correct Answer

(B) $$sigma {cos ^2} heta $$

[#268] In the below figure, the point C represents

(A) Elastic limit

(B) Upper yield point

(C) Lower yield point

(D) Breaking point

Correct Answer

(C) Lower yield point

Explanation

Solution:

[#269] The maximum deflection of a fixed beam carrying a central point load lies at

(A) Fixed ends

(B) Center of beam

(C) $$frac{l}{3}$$ from fixed ends

(D) None of these

Correct Answer

(B) Center of beam

[#270] When a bar of length '$$l$$' and diameter 'd' is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)

(A) $$frac{{{ ext{w}}l}}{{2{ ext{E}}}}$$

(B) $$frac{{{ ext{w}}{l^2}}}{{2{ ext{E}}}}$$

(C) $$frac{{{ ext{w}}{l^3}}}{{2{ ext{E}}}}$$

(D) $$frac{{{ ext{w}}{l^4}}}{{2{ ext{E}}}}$$

Correct Answer

(B) $$frac{{{ ext{w}}{l^2}}}{{2{ ext{E}}}}$$

Strength Of Materials In Me - Study Mode

[#266] When a body is subjected to a direct tensile stress ($$sigma $$) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle $$ heta $$ to the normal of the section is

Correct Answer

[#267] When a body is subjected to a direct tensile stress ($$sigma $$) in one plane, then normal stress on an oblique section of the body inclined at an angle $$ heta $$ to the normal of the section is

Correct Answer

[#268] In the below figure, the point C represents

Correct Answer

Explanation

[#269] The maximum deflection of a fixed beam carrying a central point load lies at

Correct Answer

[#270] When a bar of length '$$l$$' and diameter 'd' is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)

Correct Answer