Grade 8 Technology Assessment

Which structural member in a roof truss is under compression?

• Tie beam

• King post

• Rafter

• Strut

What type of force acts on a tie beam in a roof truss?

• Tension

• Compression

• Shear

• Torsion

What is the primary purpose of cross-bracing in pylons?

• Aesthetic appeal

• Cost reduction

• Stability and stiffness

• Flexibility

Which type of bridge uses suspension cables to support the deck?

• Beam bridge

• Cantilever bridge

• Cable-stayed bridge

• Suspension bridge

Which type of gear introduces counter-rotation between two spur gears?

• Bevel gear

• Idler gear

• Worm gear

• Rack and pinion

What does a cam mechanism convert?

• Linear motion into rotary motion

• Rotary motion into reciprocating motion

• Rotary motion into linear motion

• Reciprocating motion into rotary motion

The purpose of using biodegradable plastic bags is to:

• Increase production cost

• Improve product quality

• Reduce environmental impact

• Improve packaging aesthetics

The convention used to illustrate the hidden details in the drawing is a ...

• Centre line

• Dimension line

• Dash line

• Thin line

Which structural failure occurs due to a lack of stability?

• Fracture

• Bending

• Toppling over

• Shear failure

What is the function of an arch in construction?

• To provide flexibility

• To support loads efficiently by distributing weight

• To increase the height of a structure

• To improve aesthetics only