Civil engineering 2nd year quiz, PIT

What is the Poisson's ratio for concrete?

• 0.15

• 0.20

• 0.25

• 0.30

A steel rod has a yield strength of 250 MPa. What is the allowable stress?

• 150 MPa

• 200 MPa

• 250 MPa

• 300 MPa

Define modulus of elasticity.

• Ratio of stress to strain

• Ratio of strain to stress

• Ratio of stress to pressure

• Ratio of pressure to stress

What is the difference between ductility and malleability?

• Ductility is the ability to deform without breaking, while malleability is the ability to deform without cracking.

• Ductility is the ability to deform without cracking, while malleability is the ability to deform without breaking.

• Ductility is the ability to withstand high temperatures, while malleability is the ability to withstand high pressures.

• Ductility is the ability to withstand high pressures, while malleability is the ability to withstand high temperatures.

A beam is subjected to a bending moment of 100 kNm. What is the maximum stress?

• 100 MPa

• 200 MPa

• 300 MPa

• 400 MPa

What is the formula for calculating the moment of inertia of a rectangular section?

• I = (b × d^3) / 12

• I = (b × d^2) / 6

• I = (b × d^3) / 6

• I = (b × d^2) / 12

Define shear strain.

• Deformation per unit length in the direction of the force

• Deformation per unit length perpendicular to the direction of the force

• Deformation per unit area in the direction of the force

• Deformation per unit area perpendicular to the direction of the force

What is the difference between tensile and compressive stress?

• Tensile stress is positive, while compressive stress is negative.

• Tensile stress is negative, while compressive stress is positive.

• Tensile stress occurs in beams, while compressive stress occurs in columns.

• Tensile stress occurs in columns, while compressive stress occurs in beams.

A column is subjected to an axial load of 500 kN. What is the maximum stress?

• 100 MPa

• 200 MPa

• 300 MPa

• 400 MPa

What is the formula for calculating the torque in a circular shaft?

• T = (π × d^3 × τ) / 16

• T = (π × d^3 × τ) / 32

• T = (π × d^2 × τ) / 16

• T = (π × d^2 × τ) / 32