Civil Engineering Online Review

The max. moment of a beam with span 7m. carrying uniform load of 12kN/m with both ends fixed is equal to:

Solution:

Read more…

In a tri-axial test, sigma 1 and sigma 3 are the principal stresses. If sigma 1 = 69psi (0.478Mpa) and sigma 3 = 19psi (0.131MPa). The angle of internal friction is nearly.

Solution:

Read more…

A system is composed of subsystem A and two subsystem B. Subsystem A is connected in series to the two subsystem B which are connected in parallel. The  reliability of system A is 0.95 and the reliability of system B is 0.80, what is the maximum overall system reliability?

Solution:

Read more…

The ultimate strength Mu of a rectangular reinforced concrete beam, with steel strength fy = 250MPa, concrete strength fc = 40MPa, reinforced with 10-40mm diameter bars, d = 930mm, b = 400mm is nearest to in kN-m.

Solution:

Read more…

The moment of inertia of a trapezoid with base b = 600mm and top a = 400mm and depth d = 900mm is nearest to:

Solution:

Read more…

A strip of steel 1mm thick is bent into an arc of a circle of radius 1.0m E is equal to 200GPa. The maximum bending stress is:

Solution:

Read more…

The shear capacity V if a steel wide flange section, 600mm deep whose web is 9mm thick, is closest to (Assume fy = 200MPa)

Solution:

Read more…

A thin walled cylindrical shell has an internal diameter of 2m and is fabricated from plates 20mm thick, the tensile strength of the plates is 400 N/mm². The factor of safety is 6 Young’s modulus is 200,000 N/mm², and Poisson’s ratio μ = 0.3. Calculate the safe pressure in the shell?

Solution:

Read more…

Find the resultant of four parallel forces acting on a horizontal bar AB with length of 11m; 400kN download at the left most end, 800kN downward at 9m from the left end and 300kN upward at 11m from the left end.

Solution:

Read more…

A two continuous beam is to be designed using the plastic method of Analysis the first span is 6m. long and adjacent span is 4m. long. Both spans are loaded with uniform load of 30kN/m. The shorter span carries a concentrated load of 60kN at its center. Using a load factor of 1.70, what is the plastic moment capacity?

Solution:

Read more…

A 10m steel wide flange beam is laterally supported. The width of the web if the beam is 700mm and web thickness is 10mm. If fy is equal to 250MPa, the allowable bending stress is:

Solution:

Read more…

A steel column has the following properties. Modulus of elasticity E = 200,000MPa, yield strength Fy = 200MPa length L = 12m, moment of inertia I = 37.7 x 10⁶mm⁴ and area = 8,000mm². The allowable stress is closest to:

Solution:

Read more…

The required stirrup spacing for a 10mm diameter ties in a reinforced concrete beam with depth of 800mm to carry the net shear of 83.8 kN, if fy = 200MPa, is nearest to:

Solution:

Read more…

The steel ratio of the 9mm spiral reinforcement for a round column 600mm in diameter, with values of fy = 200MPa, fc’ = 30MPa, is: Assume concrete cover of 40mm.

Solution:

Read more…

A rectangular footing 2m. by 1.5m carries a vertical load of 500kN and moment of 100kN-m in the longer direction of the footing. What is the maximum soil pressure under the footing?

Solution:

Read more…

Three structural member (AB, BC and CA) of equal lengths, L, areas A and elastic module E, pin jointed at the ends to form a triangular truss ABC. The truss is pinned (not roller) supported at A and B. At C a vertical load w is applied at C. Which of the following gives the vertical deflection at joint C.

Solution:

Read more…

A concrete column of cross-sectional area Ac is reinforced by steel bars of area As. The modulus of elasticity of concrete is Ec and that of steel is Es. A load P is transmitted to the column through a rigid plate so that the deflection of the concrete is equal to that of the steel. Given P, As, Ac, Es and Ec, the shortening of deflection of the column is:

Solution:

Read more…

A cantilever beam has a vibrating mass “m” at the tip. The beam has the following properties:

Length                 317.5mm

Thickness             6.35mm

Width                  25.4mm

Modulus E           206.85 x 10³ MPa

The value of spring constant k for the beam is nearly:

Solution:

Read more…

Question:

The slenderness ratio of a column is generally defined as the ratio of its.

Answer:

Unsupported length to its minimum radius gyration.