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The internal transverse force at a section that tends to produce sliding between element parts

The internal action at a section that causes rotation or bending — force × distance about the section

A structural configuration made of slender members pinned at ends, whose members carry only tension or compression

The top and bottom longitudinal members of a truss that form the outline (usually resisting most bending)

The sloping or vertical members connecting chords in a truss

A truss formed by repeatedly adding two-member elements so each new element adds one joint

A truss that is assembled by joining two or more simple trusses to cover a larger span

A truss that cannot be classified as simple or compound; more complex geometry

A member that carries zero force under given loading due to geometry and load arrangement

Testing joint equilibrium to find member axial forces, assuming unknowns are tensile initially

Cutting through a truss into two parts and applying equilibrium to find specific member forces

A three-dimensional truss where the simplest stable element is a four-joint tetrahedron

A structure whose unknown support reactions and internal forces can be found using only equilibrium equations

A structure with more unknowns than available equilibrium equations

A structure that will collapse or move because constraints or member arrangement do not prevent motion

External condition where all support reactions meet at one point (or are parallel) making the support system unable to resist certain loads

When inspection of member layout shows the truss cannot hold its joints in fixed positions

The algebraic relationships used to solve equilibrium in a 2D body

The formula used for planar truss determinacy relating number of bars b, reactions r and joints j

The expression for degree of indeterminacy for a truss

A truss member can carry bending moment as a primary internal action under the standard truss assumptions

If b + r < 2j for a planar truss, the truss is unstable

A simple truss is always internally stable by inspection

Shear force at a section is identical just left and right of a concentrated transverse load

For a general planar frame, if the number of support reactions r equals 3n (n = number of members), the structure is statically determinate

Concurrent reaction lines at supports always produce a stable support arrangement

The three internal loadings at a point in a beam are ________, ________, and ________

The assumption that truss members are pinned at their ends and loads are applied only at joints ensures members carry only ________ or ________

The equilibrium equations used on a free-body of a cut section are ΣFx=0, ΣFy=0, and Σ________=0.

In the determinacy test for trusses, the letter j stands for ________

The simplest stable 3D element used in space trusses is the ________ (a four-joint element)

Which expression gives the degree of static indeterminacy for a planar truss?

Which condition indicates external instability of a supported structure?

Which action is not one of the three internal loadings at a beam section?

The “method of joints” is most directly based on which principle?

If a truss has b = 21, j = 12, and r = 3, the classification is:

match left column to right column

place each term into the correct category

The internal force component that acts perpendicular to the longitudinal axis of a beam section

The internal action that results from multiplying force by its perpendicular distance from a reference section

The internal force that acts collinear with the axis of a structural member

The analytical approach where a truss joint is isolated and equilibrium equations are applied directly at that joint

The analysis technique that involves slicing through no more than three unknown members and solving using equilibrium

The condition where a truss satisfies b + r > 2j

The condition where a truss satisfies b + r < 2j

The simplest planar truss that begins with a triangular configuration

A truss created by combining multiple simple trusses into a larger system

A structural system that cannot resist loads due to improper support reaction orientation

In a standard truss model, members are assumed to be connected by rigid joints

If all support reactions intersect at a single point, the structure may be externally unstable

A zero-force member always carries zero force under all possible load conditions

The equilibrium equations alone are sufficient to solve any statically indeterminate structure

A space truss requires three-dimensional equilibrium equations for analysis

The bending moment at a section can exist even if shear force at that section is zero

For planar truss determinacy, the equation used is ________

If (b + r − 2j) yields a positive value, the structure is statically ________

In 2D equilibrium of a rigid body, there are exactly ________ independent equations available

The two fundamental force components at a truss joint are resolved along the ________ and ________ directions

In beam section analysis, internal forces are revealed by making an imaginary ________ at the location of interest

Which assumption ensures that truss members carry only axial force?

If a planar truss has 15 joints and 27 members with 3 reactions, classification is:

Which of the following indicates external instability?

The main unknowns solved in truss analysis are:

The equilibrium equation used to eliminate unknown forces efficiently in section analysis is usually:

Match the concept to its description

Group the following under the correct heading