WorksheetsSci 7 Final Exam Review Structures
Total questions: 29
Worksheet time: 15mins
The main purpose of a suspension bridge's cable system is to:
Make the bridge look nice
Increase weight
Support and distribute the load
Keep the bridge low to the ground
Which of the following would be considered an external force acting on a building?
Wind blowing against the wall
Friction in a nail joint
Stress between beams
Compression in the roof
What is the most likely reason a frame structure might fail?
It weighs too much
The joints are too flexible
The external load is not evenly distributed
It is made from one single material
The mass of an object is measured in:
Pounds
Newtons
Kilograms
Joules
A mobile joint is useful in structures that:
Must stay perfectly still
Have to withstand earthquakes
Need to allow movement
Are made only from wood
An example of a natural frame structure is:
Spider web
Tent
Bike frame
Wooden door
A bridge made from many small triangles is designed this way to:
Reduce the need for joints
Make it easier to collapse
Evenly distribute forces
Increase the number of moving parts
A dead load refers to:
The moving cars on a road
The force of wind
The permanent weight of a structure
Anything that increases tension
What does a beam primarily resist?
Torsion
Bending
Tension
Compression
Why would an engineer use triangular shapes in bridge design?
They take up less space
They add flexibility
They provide stability and strength
They are easier to weld
What is the role of struts in a frame structure?
Allow motion
Act as decoration
Resist compression
Create shell layers
Which force tries to pull a material apart?
Compression
Tension
Torsion
Shear
Which of the following is not an internal force?
Bending
Torsion
Gravity
Compression
A person presses on a door and it bends slightly. This is an example of:
External torsion
Internal compression
Internal bending
External friction
A composite material is used when you want a material that:
Is very lightweight and flexible
Is made of only one substance
Can only be used once
Combines the strengths of multiple materials
One disadvantage of a shell structure is:
It uses too many pieces
It can't be hollow
It may collapse if the outer shell is weak
It requires moving parts
What do we call the point where all mass appears to be concentrated?
Load center
Gravity core
Center of gravity
Dead load
Which material would likely provide the best strength-to-weight ratio in an emergency shelter?
Brick
Concrete
Reinforced plastic
Steel
A solid structure is likely to be:
Full of air pockets
Hollow and light
Dense and heavy
Built only from plastic
Fracture or breakage in a structure is most often caused by:
Balanced loads
Low temperatures
Internal stresses exceeding material limits
Use of rigid joints
A woven or knit material is effective for tents because:
It conducts electricity
It allows air and water in easily
It provides flexibility and distributes forces
It is very stiff and rigid
The best way to improve a structure’s stability is to:
Add a mobile joint
Raise its center of gravity
Widen the base
Use lightweight materials only
Which of the following is an example of torsion in action?
Squeezing a sponge
Pulling a rope
Twisting open a jar
Bending a pipe
A bridge collapses after repeated small vibrations caused by heavy traffic. This failure is likely due to:
Dead load stress
Internal bending
Metal Fatigue
Static pressure
Layered materials are useful in construction because they:
Add more colour
Help reduce tension
Increase strength and resist damage
Always weigh less
What is one disadvantage of using only natural materials in modern construction?
They are always too heavy
They may lack uniform strength or durability
They cannot be cut or shaped
They have no flexibility
A building swaying during an earthquake demonstrates the benefit of:
Solid shell structures
Flexible design
Mobile joints
Internal compression
A column supporting a building resists which internal force?
Shear
Tension
Torsion
Compression
If an engineer wants to make a structure both safe and cost-effective, they should:
Use only the cheapest materials
Add extra mass to all areas
Choose efficient shapes and strong, affordable materials
Avoid using any internal forces
