DT Exam Prep

Which of the following is an example of a smart material that changes with light?

• Thermochromic

• Photochromic

• Composite

• Alloy

What is a composite material?

Which of the following is an example of an alloy?

• Carbon fiber reinforced plastic

• Stainless steel

• Polymer lined boards

• Foil

What type of motion is described as movement in a straight line, such as on a paper trimmer?

• Rotary Motion

• Oscillating Motion

• Reciprocating Motion

• Linear Motion

Which type of motion involves movement backwards and forwards in a straight line, like the movement of a needle on a sewing machine?

• Rotary Motion

• Oscillating Motion

• Reciprocating Motion

• Linear Motion

What type of motion is characterized by movement round in a circle, such as turning a wheel?

• Rotary Motion

• Oscillating Motion

• Reciprocating Motion

• Linear Motion

Which type of motion involves swinging from side to side, like a pendulum in a clock?

• Rotary Motion

• Oscillating Motion

• Reciprocating Motion

• Linear Motion

What is Kevlar primarily used for?

• Making decorative fabrics

• Making personal armor such as bulletproof vests

• Making everyday clothing

• Making furniture

Which property describes a material that can be pressed into a shape or form without cracking?

• Ductile

• Strength

• Malleable

• Hardness

What does the property 'Ductile' refer to?

• The ability of a material to resist scratching

• The ability of a material to change shape by stretching into a long length

• The ability of a material to withstand sudden shock

• The ability of a material to bend without breaking