Unit 3 MCQ Bank

Smooth Contact

Separates a smooth wedge or wall contact from a rough one.

Angle of Friction

Checks the relation between angle and coefficient of friction.

Angle of Repose

Checks a repeated theory relation.

Ladder Smooth Wall

Checks the wall reaction direction in ladder friction.

Method of Joints Start

Checks the correct starting condition in truss analysis.

Zero-Force Member Rule

Checks the classic unloaded-joint shortcut.

Member Sign Interpretation

Checks how to read a negative result after assuming tension.

Tight and Slack Sides

Checks the meaning of the belt-friction ratio.

Wrap Angle Units

Checks a common belt-friction trap.

Three Members at a Joint

Checks the other standard zero-force shortcut.

Zero-Force Limitation

Checks when the previous shortcut cannot be used.

Method of Sections Cut Rule

Checks the standard cut-selection limit.

Moment Point in Sections

Checks the strategy for solving one cut force directly.

Tension Sign Convention

Checks the standard assumption at a truss joint.

Compression Interpretation

Checks the visual meaning of a compressive member force.

Ideal Truss Model

Checks the structural idealization used for joint equilibrium.

Ladder Moment Point

Checks the usual moment choice in ladder friction.

Kinetic Friction

Separates sliding friction from limiting static friction.

Relative Motion on Incline

Checks friction direction for upward impending motion.

Relative Motion Down Incline

Checks friction direction for downward impending motion.

Action-Reaction at Contact

Checks separate FBD logic for wedge problems.

Smooth Guide Reaction

Checks the guide reaction direction in wedge and collar problems.

Cone of Friction

Checks the meaning of the cone concept.

Body on Angle Greater than Repose

Checks the physical consequence of exceeding the repose angle.

Cable Horizontal Component

Checks a repeated cable-with-loads property.

Cable Maximum Tension

Checks the qualitative location of highest cable tension.

Joint Loading Idealization

Checks where truss loads should act in the ideal model.

Support Reactions First

Checks the starting step before truss member solving.

Wedge Floor Friction

Checks floor-friction direction on a pushed wedge.

Wedge-Top Friction

Checks the friction direction on a block being raised by a wedge.

Coefficient Ordering

Checks the usual relation between static and kinetic coefficients.

Belt Wrap Effect

Checks how wrap angle affects the allowable tension ratio.

Joint Equilibrium Form

Checks the type of force system at a truss joint.

Section Choice

Checks when method of sections is the faster tool.

Cut Limit

Checks the consequence of a poor section cut.

Truss Geometry Use

Checks why member angles matter in joint equations.

Negative Friction Assumption

Checks what a negative solved friction value means.

Support Load in Zero-Force Rule

Checks whether a support reaction counts as joint loading.

Ladder Floor Normal

Checks vertical equilibrium when the wall is smooth.

Person on Ladder

Checks how an added climber changes the floor reaction.

Impending Slip Criterion

Checks the condition used to find minimum ladder angle or maximum climb.

Block on Incline with Horizontal Push

Checks force resolution for a less direct friction setup.

Joint Equations

Checks why moments are not used at a single ideal joint.

Method of Sections Needs Reactions

Checks whether section analysis can skip the support-reaction step.

Actual Versus Limiting Friction

Checks the difference between required friction and maximum available friction.

Section Side Choice

Checks the smarter side to isolate after a truss cut.

Belt No-Slip Criterion

Checks how the belt-friction ratio is interpreted physically.