TED: Unit 4

The ratio of the output force produced by a working force applied to the effort.

• Mechanical Advantage
• Efficiency
• Work
• Power

An example of a subsystem in a car is:

• the steering wheel.
• the suspension.
• the tire.
• the windshield.

If a lever has the mechanical advantage of 5, how much force is needed to move an object that weighs 100 lbs?

• 5 lb F
• 10 lb F
• 20 lb F
• 25 lb F

Input Force x Input Distance = Output Force x Output Distance may be used to check for the proper design of a mechanical system. What type of model is this?

• Working model
• Mathematical model
• Statistical model
• Visualization model

In order for an engineer to assess if a designed system is operating correctly:

• information is necessary.
• thinking is necessary.
• feedback is necessary.
• communication is necessary.

All are examples of ceramics except:

• glass.
• tungsten carbide.
• clay.
• titanium.

Carbon fiber has weak compression strength, but is relatively high in ______________________ strength, because it cannot be easily pulled apart.

• tensile
• creep
• fracture
• hardness

Concrete is exceptionally high in compression strength but relatively weak in _______________ strength, because it can easily be pulled apart.

• tensile
• creep
• fracture
• hardness

The ability of a material to resist various kinds of rapidly changing stresses is known as:

• fatigue strength.
• creep strength.
• hardness.
• tensile strength.

A computer processor can become extremely hot and must be cooled. A heat sink is placed on top of the processor to extract its heat. What material should the heat sink be made from?

• Metal
• Ceramic
• Plastic
• Composite