Top 1000+ Solved Strength of Materials MCQ Questions Answer

Q. For the stepped rod shown in Fig. 1.3,the in .

a. aluminum

b. copper

c. steel

d. none of these

Q. A steel bar ABC (E = 200 GPa) is 1 m long. For AB = 0.7 m, it has cross section P area of 500 mm2 and for BC = 0.3 m the cross section area is 400 mm2. The bar is subjected to an axial pull of 100 kN. The stress is maximum in ___ _

a. ab

b. bc

c. same throughout

d. none of these

Q. A stepped bar of steel consists of a pmormtion with cross section area 500 mm2 connected to a portion with cross section area 1000 2. Each portion has a length of 1 m. The modulus of elasticity of steel is200 GPa. The maximum elongation of the bar by applying an axial tensile force at the ends without exceeding a stress of 100 MPa is mm.

a. 0.5

b. 0.75

c. 0.1

d. 0.15

Q. The change in length of a rod of uniform circular cross section was found to be 2 mm for some applied force. The change in length of a rod of the same material and length but of half the diameter subjected to the same force will be Mm

a. 1

b. 2

c. 0.5

d. 4

Q. A strip of steel (E = 200 GPa, 0.25) has a length of 1 m, width of200 mm and thickness of 10 mm. A line of length 1 m is drawn parallel to its length on one of its side surfaces. When the strip is subjected to an axial tensile force of100 kN, the length of the line will be mm.

a. 1000

b. 1000.25

c. 999.25

d. 0.25

Q. The change in length of a rod of uniform cross section was found to be2 mm for some applied force. The change in length of a rod of the same material and length but of twice the cross section area subjected to the same force will be__ mm.

a. 1

b. 2

c. 0.5

d. 4

Q. Two rods have uniform cross section areas in the ratio 1 : 2 and are subjected to axial tensile forces with magnitudes in the ratio 2 : 1. The stresses induced in the two rods will be in the ratio ____ _.

a. 1 : 2

b. 2 : 1

c. 1 : 1

d. 4 : 1

Q. Two rods have uniform cross section areas in the ratio 1 : 2 and are subjected to axial tensile forces with magnitudes in the ratio 1 : 2. The stresses induced in the two rods will be in the ratio ____ _.

a. 1:1

b. 1:2

c. 1:1

d. 4:1

Q. Two rods have uniform cross section areas in the ratio 1 : 2 and are subjected to axial tensile forces of the same magnitude. The stresses induced in the two rods will be in the ratio __ _ .

a. 1 : 2

b. 2 : 1

c. 1 : 1

d. 4 : 1

Q. If an axial force of 15 kN is applied to a rod of 25 mm diameter, length 300 mm, the change in length of the rod was observed to be 0.045 mm. The modulus of elasticity of the material is 200 GPa. The strain in the rod will be ____ _.

a. 1.5

b. 1.5*10-4

c. 1.33*10-3

d. 0.0455

Q. If an axial force of 1 kN is applied to a rod of 100 mm cross section area produces change in length of 1 mm over a length of 12 m, the modulus of elasticity of the material will be---------

a. 120mpa

b. 10gpa

c. 12gpa

d. 120gpa

Q. If an axial force of 1 kN is applied to a rod of 100 mm2cross section area, length 5 m and the modulus of elasticity of the material is 100 GPa, the change in length of the rod will be ___ .

a. 1mm

b. 1.2mm

c. 0.5mm

d. 0.25mm

Q. The longitudinal stress developed in a rod of cross section area 50 mm2 is 100 MPa. The force acting along its axis is -------

a. 2n

b. 2.5kn

c. 5n

d. 5.5kn

Q. If an axial force of 1 kN is applied to a steel rod of 100 mm2 cross section area, the stress in it will be ___ .

a. 10mpa

b. 10gpa

c. 1mpa

d. 1gpa

Q. Two equal and opposite forces of magnitude 10 kN are applied at the ends of a steel wire to increase its length. The internal force in thewire will be-----KN

a. 0

b. 10

c. 20

d. 15

Top 1000+ Solved Strength of Materials MCQ Questions Answer

From 721 to 735 of 864

Q. For the stepped rod shown in Fig. 1.3,the in .

Q. A steel bar ABC (E = 200 GPa) is 1 m long. For AB = 0.7 m, it has cross section P area of 500 mm2 and for BC = 0.3 m the cross section area is 400 mm2. The bar is subjected to an axial pull of 100 kN. The stress is maximum in ___ _

Q. The change in length of a rod of uniform circular cross section was found to be 2 mm for some applied force. The change in length of a rod of the same material and length but of half the diameter subjected to the same force will be Mm

Q. A strip of steel (E = 200 GPa, 0.25) has a length of 1 m, width of200 mm and thickness of 10 mm. A line of length 1 m is drawn parallel to its length on one of its side surfaces. When the strip is subjected to an axial tensile force of100 kN, the length of the line will be mm.

Q. The change in length of a rod of uniform cross section was found to be2 mm for some applied force. The change in length of a rod of the same material and length but of twice the cross section area subjected to the same force will be__ mm.

Q. Two rods have uniform cross section areas in the ratio 1 : 2 and are subjected to axial tensile forces with magnitudes in the ratio 2 : 1. The stresses induced in the two rods will be in the ratio ____ _.

Q. Two rods have uniform cross section areas in the ratio 1 : 2 and are subjected to axial tensile forces with magnitudes in the ratio 1 : 2. The stresses induced in the two rods will be in the ratio ____ _.

Q. Two rods have uniform cross section areas in the ratio 1 : 2 and are subjected to axial tensile forces of the same magnitude. The stresses induced in the two rods will be in the ratio __ _ .

Q. If an axial force of 15 kN is applied to a rod of 25 mm diameter, length 300 mm, the change in length of the rod was observed to be 0.045 mm. The modulus of elasticity of the material is 200 GPa. The strain in the rod will be ____ _.

Q. If an axial force of 1 kN is applied to a rod of 100 mm cross section area produces change in length of 1 mm over a length of 12 m, the modulus of elasticity of the material will be---------

Q. If an axial force of 1 kN is applied to a rod of 100 mm2cross section area, length 5 m and the modulus of elasticity of the material is 100 GPa, the change in length of the rod will be ___ .

Q. The longitudinal stress developed in a rod of cross section area 50 mm2 is 100 MPa. The force acting along its axis is -------

Q. If an axial force of 1 kN is applied to a steel rod of 100 mm2 cross section area, the stress in it will be ___ .

Q. Two equal and opposite forces of magnitude 10 kN are applied at the ends of a steel wire to increase its length. The internal force in thewire will be-----KN

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