Diagnostic Test-Prestressed Concrete Design

Which of the following is one of the criteria to be considered in a design process?

• Structure should be aesthetically pleasing but structurally unsafe

• Structure should be cheap in cost even though it may be structurally unsafe

• Structure should be structurally safe but less durable

• Structure should be adequately safe, should have adequate serviceability

The structure is statically indeterminate when_______________

• static equilibrium equations are insufficient for determining internal forces and reactions on that structure

• static equilibrium equations are sufficient for determining internal forces and reactions on that structure

• structure is economically viable

• structure is environment friendly

What is limit state?

• Acceptable limits for safety and serviceability requirements before failure occurs

• Acceptable limits for safety and serviceability requirements after failure occurs

• Acceptable limits for safety after failure occurs

• Acceptable limits for serviceability after failure occurs

Which of the following factors is included in the serviceability limit state?

• Brittle facture

• Fracture due to fatigue

• Failure by excessive deformation

• Deformation and deflection adversely affecting appearance or effective use of structure

What is permanent action according to classification of actions by BS EN code?

• due to self weight of structures, fixed equipments

• due to imposed loads on floors, beams, roofs, wind or snow loads

• due to accidents

• due to earthquake loads

What is variable action according to classification of actions by BS EN code?

• due to self weight of the structure

• due to accidents

• due to imposed loads on floors, beams, roofs, wind or snow loads

• due to earthquake loads

What are laterally restrained beams?

• adequate restraints are provided to beam

• adequate restraints are not provided to beam

• economically not viable

• unstable beams

Which of the following is not true?

• for optimum bending resistance, beam material should be near neutral axis

• for optimum bending resistance, beam material should be far away from neutral axis

• for optimum bending resistance, web area of beam has to be adequate for resisting shear

• maximum bending and maximum shear usually occur at different cross section

What is the expression of bending equation?

• M/I = σ/y

• M/R = σ/y

• M/I = σ/R

What will be the moment of inertia of the given rectangular section about an horizontal axis through C.G.?

• 350 mm4

• 379 mm4

• 416 mm4

• 270 mm4