A beam element in FEM is typically modeled with how many degrees of freedom per node for 2D analysis?

The correct answer is C: 3 DOF (axial, vertical, and rotation). In 2D beam/frame element, each node has 3 DOF: horizontal displacement (u), vertical displacement (v), and rotation (θ). Total DOF per element = 6.

In plastic analysis, the load factor for a structure is the ratio of:

The correct answer is B: Collapse load to service load. Load factor (collapse multiplier) = Collapse load/Service load. It measures how much the load can be increased before collapse.

Which of the following is NOT a type of aggregate used in concrete?

The correct answer is D: Rigid aggregate. Rigid aggregate is not a standard classification. Aggregates are classified as coarse, fine, and lightweight based on size and density.

In plastic analysis of structures, the collapse load is determined by assuming:

The correct answer is B: Formation of plastic hinges at critical sections. Plastic analysis assumes yielding at critical sections forms plastic hinges where full plastic moment capacity is achieved, leading to collapse mechanism.

A three-hinged arch is statically determinate because it has:

The correct answer is B: Four support reactions and one additional equation from the internal hinge. Three-hinged arch has 4 reaction components (2 at each support) and 3 equilibrium equations plus 1 condition that moment at internal hinge = 0, making it statically determinate.

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Civil Engineering

Structures, surveying, soil mechanics

34 Q 2 Topics Take Mock Test

Difficulty: All Easy Medium Hard 31–34 of 34

Topics in Civil Engineering

All Structural Analysis 92 Concrete Technology 19

Q.31 Easy Structural Analysis

In slope deflection method, what does the term 'FEM' represent?

A Fixed End Moment

B Flexural End Movement

C Final Elastic Moment

D Factored End Moment

Correct Answer: A. Fixed End Moment

EXPLANATION

FEM (Fixed End Moment) are moments developed in a member if both ends are fixed against rotation.

Test

Q.32 Easy Structural Analysis

For a cantilever beam of length L carrying uniformly distributed load w, the maximum bending moment occurs at:

A Free end

B Mid-span

C Fixed end

D At L/3 from fixed end

Correct Answer: C. Fixed end

EXPLANATION

For cantilever, maximum BM = wL²/2 occurs at fixed end where slope and deflection are also maximum.

Test

Q.33 Easy Structural Analysis

In the method of sections for truss analysis, the section should pass through maximum how many members?

A 2 members

B 3 members

C 4 members

D 5 members

Correct Answer: B. 3 members

EXPLANATION

Section should pass through maximum 3 members to solve for unknowns using 3 equilibrium equations (ΣFx, ΣFy, ΣM).

Test

Q.34 Easy Structural Analysis

Which of the following statements about determinate structures is correct?

A Number of unknowns equals number of equilibrium equations

B Number of unknowns exceeds number of equilibrium equations

C Number of unknowns is less than number of equilibrium equations

D Equilibrium equations are not applicable

Correct Answer: A. Number of unknowns equals number of equilibrium equations

EXPLANATION

A determinate structure has exactly as many unknowns as equilibrium equations, allowing unique solution without material properties.

Test

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