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WorksheetsMechanics of Materials Quiz unit 5
Total questions: 30
Worksheet time: 15mins
What is a pin-jointed frame?
Frame with welded joints
Frame with bolted joints
Frame where members are connected by pins
Frame made of continuous members
In a pin-jointed structure, members are assumed to carry only:
Bending moment
Axial force
Shear force
Torsion
Which of the following methods is used to analyze pin-jointed frames?
Moment Distribution Method
Finite Element Method
Method of Joints
Conjugate Beam Method
The condition of equilibrium for a joint in a planar truss is:
ΣFx = 0 and ΣFy = 0
ΣFx=0, ΣFy=0 & ΣM=0
ΣFy = 0 and ΣM = 0
ΣM = 0 only
If a member in a truss carries a pulling force, it is said to be in:
Shear
Tension
Compression
Bending
A redundant frame has:
Too few members
Just enough members
More members than required
No supports
A perfect frame satisfies which condition (for planar truss)?
m = 2j
m = 3j
m = 2j - 3
m = j - 2
What is the first step in method of joints?
Find internal forces
Start from central joint
Find support reactions
Assume all members in compression
In a truss, a zero-force member is used to:
Reduce weight
Increase cost
Provide stability
Transfer bending moment
The method of joints primarily applies which laws?
Pascal's law
Hooke’s law
Newton’s laws
Archimedes' principle
For a 2D truss, how many equilibrium equations are available per joint?
3
1
2
4
A triangular frame is a:
Redundant frame
Unstable frame
Over determinate frame
Perfect frame
What defines a simple truss?
m > 2j – 3
m < 2j – 3
Redundant members
m = 2j – 3
Which one is not an internal force in a truss member?
Tension
Compression
Bending moment
Axial force
In method of joints, each joint is analyzed by:
Taking moments
Resolving forces
Calculating displacement
Using compatibility equations
In an ideal truss, all loads and reactions are:
Point loads
Uniformly distributed
Moment loads
Applied at joints
Which is true for a zero-force member?
No force even under load
Always in compression
Supports main load
Always at mid-span
Which of the following is not a planar truss?
King post
Warren truss
Space frame
Pratt truss
Which element is assumed frictionless in a pin-jointed frame?
Pin
Member
Support
Load
The sum of forces at a joint in equilibrium must be:
Equal to applied load
Zero
Equal to support reaction
Maximum possible
Method of joints cannot be applied if:
The load is static
All joints are accessible
More than two unknowns exist at a joint
Truss is simple
Which force direction is assumed as positive in analysis?
Downward
Towards joint
Away from joint (tension)
Clockwise
A member carrying zero force is usually located at:
Joints with no external load or two collinear members
Supports
End members
Middle of span
In the method of joints, what is analyzed first?
Joint with maximum known forces
Highest load point
Bottom chord
Diagonal members
A structure will be unstable if:
m > 2j – 3
m = 2j – 3
m < 2j – 3
m = 3j – 3
Which type of load is primarily resisted by trusses?
Lateral loads
Earthquake forces
Torsional loads
Axial loads
Which of the following structures can be analyzed by method of joints?
Beams
Frames
Trusses
Slabs
The method of joints is a:
Displacement method
Force method
Combined method
Empirical method
The purpose of method of joints is to find:
Displacement
Force in each member
Moment in frame
Reactions only
A K-truss is generally used in:
Roofs
Long-span bridges
Stairs
Domes
