SS Practice Questions well answered
graded A+ 2025 updated
Moment of inertia for the cross section of a member is related to the
I. Shape of the cross section
II. Modulus of elasticity of the material
III. Dimensions of the cross section
IV. Load applied on the member
A. I, II
B. I, III
C. I, II, III
D. II, III, IV - correct answer ✔✔B. I, III
Moment of inertia is property of the section and not the material
Section modulus for the cross section of a member is related to the
I. Moment of inertia of the cross section
II. Depth of the cross section
III. Bending stress in the member
,IV. Modulus of elasticity of the member
A. I, II
B. II, III
C. I, II, III
D. II, III, IV - correct answer ✔✔A. I, II
Section modulus = section's moment of inertia / distance from cross section's
neutral axis to its extreme fibers
Strain in a member is the
A. Modulus of elasticity x stress
B. Deflection of a beam due to load
C. Applied load / area
D. Deformation or change in size caused by external forces - correct answer ✔✔D.
Deformation or change in size caused by external forces
- Modulus of elasticity = stress/strain
- Stress = load/area
Rod of AISI 1020 structural steel has DIA of 3" and has tension force of 75,000 lbf.
Modulus of elasticity is 30x10^6. What is the strain?
,A. 0.00035 in/in
B. 0.0035 in/in
C. 3.5 in/in
D. 11 in/in - correct answer ✔✔A. 0.00035 in/in
Strain = stress / E
stress = force/area
area = (pi)(r)^2 = 7.07 in^2
stress = 75,000/7.07 = 10,600
strain = 10,600/30x10^6 = 0.00035
When the top fibers of a rectangular beam are in tension and the bottom fibers
are in compression with the same magnitude as the tension, the bending moment
is
A. Positive
B. Zero
C. Negative
D. Indeterminate - correct answer ✔✔C. Negative
- If top fibers are in tension, and bottom fibers compression, then negative
moment (cantilever or upward force)
, - If top fibers are in compression and bottom fibers are in tension, then positive
moment (normal beam loading)
Bending moment in a beam is maximum when shear is:
A. Maximum
B. Equal to zero
C. Minimum
D. At its greatest value - correct answer ✔✔B. Equal to zero
Shear is the derivative of bending moment
(think about the charts)
Glulam members of the stress class 24F have an allowable bending stress of
A. 24 psi
B. 240 psi
C. 2400 psi
D. 24,000 psi - correct answer ✔✔C. 2400 psi
Number preceding the letter "F" in a glulam symbol is always in hundreds of psi
Wood I-joists are generally spaced
graded A+ 2025 updated
Moment of inertia for the cross section of a member is related to the
I. Shape of the cross section
II. Modulus of elasticity of the material
III. Dimensions of the cross section
IV. Load applied on the member
A. I, II
B. I, III
C. I, II, III
D. II, III, IV - correct answer ✔✔B. I, III
Moment of inertia is property of the section and not the material
Section modulus for the cross section of a member is related to the
I. Moment of inertia of the cross section
II. Depth of the cross section
III. Bending stress in the member
,IV. Modulus of elasticity of the member
A. I, II
B. II, III
C. I, II, III
D. II, III, IV - correct answer ✔✔A. I, II
Section modulus = section's moment of inertia / distance from cross section's
neutral axis to its extreme fibers
Strain in a member is the
A. Modulus of elasticity x stress
B. Deflection of a beam due to load
C. Applied load / area
D. Deformation or change in size caused by external forces - correct answer ✔✔D.
Deformation or change in size caused by external forces
- Modulus of elasticity = stress/strain
- Stress = load/area
Rod of AISI 1020 structural steel has DIA of 3" and has tension force of 75,000 lbf.
Modulus of elasticity is 30x10^6. What is the strain?
,A. 0.00035 in/in
B. 0.0035 in/in
C. 3.5 in/in
D. 11 in/in - correct answer ✔✔A. 0.00035 in/in
Strain = stress / E
stress = force/area
area = (pi)(r)^2 = 7.07 in^2
stress = 75,000/7.07 = 10,600
strain = 10,600/30x10^6 = 0.00035
When the top fibers of a rectangular beam are in tension and the bottom fibers
are in compression with the same magnitude as the tension, the bending moment
is
A. Positive
B. Zero
C. Negative
D. Indeterminate - correct answer ✔✔C. Negative
- If top fibers are in tension, and bottom fibers compression, then negative
moment (cantilever or upward force)
, - If top fibers are in compression and bottom fibers are in tension, then positive
moment (normal beam loading)
Bending moment in a beam is maximum when shear is:
A. Maximum
B. Equal to zero
C. Minimum
D. At its greatest value - correct answer ✔✔B. Equal to zero
Shear is the derivative of bending moment
(think about the charts)
Glulam members of the stress class 24F have an allowable bending stress of
A. 24 psi
B. 240 psi
C. 2400 psi
D. 24,000 psi - correct answer ✔✔C. 2400 psi
Number preceding the letter "F" in a glulam symbol is always in hundreds of psi
Wood I-joists are generally spaced
