MCQ Questions and Answers on Strength of Materials

Q.

The shape of the bending moment diagram for a uniform cantilever beam carrying a uniformly distributed load over its length is

A. Straight line

B. Hyperbola

C. Ellipse

D. Parabola

Discuss

Answer : Option:- D

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

The ratio of the area under the bending moment diagram to the flexural rigidity between any two points along a beam gives the change in

A. Deflection

B. Slope

C. Shear force

D. Bending moment

Discuss

Answer : Option:- B

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

Under axial load, each section of a closed-coil helical spring is subjected to

A. Tensile stress and shear stress due to load

B. Compressive stress and shear stress due to torque

C. Tensile stress end shear stress due to torque

D. Torsional and direct shear stresses

Discuss

Answer : Option:- D

Explanation :

The spring element is subjected to torsional and direct shear stress.

Q.

The area moment of inertia of a square of size 1 about its diagonal is

A. 1/3

B. 1/4

C. 1/12

D. 1/6

Discuss

Answer : Option:- C

Explanation :

The area moment of inertia of a square of size a about its diagonal axis or natural axis parallel to side is given by
I = a^4/12
As a=1 unit,
I = 1/12 (ans)

Q.

A point, along the length of a beam subjected to loads, where bending moment changes its sign, is known as the point of

A. Inflexion

B. Maximum stress

C. Zero shear force

D. Contraflexure

Discuss

Answer : Option:- D

Explanation :

The point of inflexion of a curve is a point at which the concavity or curvature changes its sign, while point of contraflexure is the point where bending moment changes its sign.

Q.

For the two shafts connected in parallel

A. Torque in each shaft is the same

B. Shear stress in shaft is the same

C. Angle of twist of each shaft is the same

D. Torsional stiffness of each shaft is the same

Discuss

Answer : Option:- C

Explanation :

Angle of twist in each shaft is the same for parallel arrangements of the shafts.

Q.

Two shafts of same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

A. 2

B. 4

C. 8

D. 16

Discuss

Answer : Option:- D

Explanation :

Angle of twist inversely proportional to 4th power of diameter.
i.e.
θ = 1/d^4;
given : d1:d2= 1:2
Thus, the ratio of angles of twist would be 2^4 = 16.

Q.

A closed-coil helical spring is cut in two equal parts along its length. Stiffness of the two springs so obtained will be

A. Double of that of the original spring

B. Same as that of the original spring

C. Half of that of the original spring

D. One-fourth of that of the original spring

Discuss

Answer : Option:- A

Explanation :

Discuss here! No Explaination Available for These Question.

Q.

Where does the maximum hoop stress in a thick walled cylinder under external pressure occur?

A. At the outer surface

B. At the inner surface

C. At the mid-thickness

D. At the 2/3rd outer radius

Discuss

Answer : Option:- B

Explanation :

Maximum hoop stress in the thick cylinder occurs at inner radius.

Q.

In a thick-walled cylinder pressurized inside, the hoop stress is maximum at

A. The center of the wall thickness

B. The outer radius

C. The inner radius

D. Both the inner and the outer radii

Discuss

Answer : Option:- C

Explanation :

The maximum hoop stress occurs at inner circumference and the hoop stress decreases towards the outer circumference.

MCQ Questions and Answers on Strength of Materials

Q. The shape of the bending moment diagram for a uniform cantilever beam carrying a uniformly distributed load over its length is

Q. The ratio of the area under the bending moment diagram to the flexural rigidity between any two points along a beam gives the change in

Q. Under axial load, each section of a closed-coil helical spring is subjected to

Q. The area moment of inertia of a square of size 1 about its diagonal is

Q. A point, along the length of a beam subjected to loads, where bending moment changes its sign, is known as the point of

Q. For the two shafts connected in parallel

Q. Two shafts of same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

Q. A closed-coil helical spring is cut in two equal parts along its length. Stiffness of the two springs so obtained will be

Q. Where does the maximum hoop stress in a thick walled cylinder under external pressure occur?

Q. In a thick-walled cylinder pressurized inside, the hoop stress is maximum at

Q.

The shape of the bending moment diagram for a uniform cantilever beam carrying a uniformly distributed load over its length is

Q.

The ratio of the area under the bending moment diagram to the flexural rigidity between any two points along a beam gives the change in

Q.

Under axial load, each section of a closed-coil helical spring is subjected to

Q.

The area moment of inertia of a square of size 1 about its diagonal is

Q.

A point, along the length of a beam subjected to loads, where bending moment changes its sign, is known as the point of

Q.

For the two shafts connected in parallel

Q.

Two shafts of same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

Q.

A closed-coil helical spring is cut in two equal parts along its length. Stiffness of the two springs so obtained will be

Q.

Where does the maximum hoop stress in a thick walled cylinder under external pressure occur?

Q.

In a thick-walled cylinder pressurized inside, the hoop stress is maximum at