Test: Strength of Materials - 1 - Mechanical Engineering MCQ

In the above graph which of the following represents ultimate tensile strength.

In a material is under cyclic load we used endurance strength as designing criterion. The failure due to such loading is because of :

Modulus of toughness is area under –

If the percentage of carbon in steel increases which of the following properties will increase
i. Ductility
ii. Brittleness
iii. Strength
iv. Toughness
v. Hardness

A square steel bar of 50 mm side and 5m length absorbs a strain energy of 100 joule when stretched upto its elastic limit. The modulus of resiliance of the bar is :

A square column has a side of 10m. What is the area of its core.

The total elongation of the shown bar is A = 5m² E = 200 GPa

For the shown figure when will be the stress at point A is tensile in nature, when

The relation ship b/w shear angle (f) and angle of twist(q) can be given as.

The shear stress distribution for a E section will be like.

 A ductile material will fail because of -

The dimension of strain is

The dimension of young's modulus (E) is

For what value of poision ratio (m) Bulk modulus and shear modulus can be equal.

A shaft made of ductile material is subjected to pure torsion. In which of the following direction will fracture occur.

Poisions' Ratio is ratio between

A shaft of shear modulus 80 GPa, polar moment of inertia 80 mm⁴ and length 1m. What is its torsional stiffness.

 If young's modulus is equal to bulk modulus, the value of poisions ratio is

The relationship b/w G,K,E can be given as,

The B.M.D for a simply supported beam with point load will be

Given the curve of bending moment is y³ - 3y².The curve of shear force is

Radius of gyration for a square cross section of area a² is