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WorksheetsTED: Unit 4
Total questions: 20
Worksheet time: 3600secs
Name
Class
Date
1.
The ratio of the output force produced by a working force applied to the effort.
a)
Mechanical Advantage
b)
Efficiency
c)
Work
d)
Power
2.
An example of a subsystem in a car is:
a)
the steering wheel.
b)
the suspension.
c)
the tire.
d)
the windshield.
3.
If a lever has the mechanical advantage of 5, how much force is needed to move an object that weighs 100 lbs?
a)
5 lb F
b)
10 lb F
c)
20 lb F
d)
25 lb F
4.
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?
a)
Working model
b)
Mathematical model
c)
Statistical model
d)
Visualization model
5.
In order for an engineer to assess if a designed system is operating correctly:
a)
information is necessary.
b)
thinking is necessary.
c)
feedback is necessary.
d)
communication is necessary.
6.
All are examples of ceramics except:
a)
glass.
b)
tungsten carbide.
c)
clay.
d)
titanium.
7.
Carbon fiber has weak compression strength, but is relatively high in ______________________ strength, because it cannot be easily pulled apart.
a)
tensile
b)
creep
c)
fracture
d)
hardness
8.
Concrete is exceptionally high in compression strength but relatively weak in _______________ strength, because it can easily be pulled apart.
a)
tensile
b)
creep
c)
fracture
d)
hardness
9.
The ability of a material to resist various kinds of rapidly changing stresses is known as:
a)
fatigue strength.
b)
creep strength.
c)
hardness.
d)
tensile strength.
10.
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?
a)
Metal
b)
Ceramic
c)
Plastic
d)
Composite
11.
What scientific principle would an electrician need to know when designing and installing wiring in new construction?
a)
Volume and flow rates
b)
Ohm's law
c)
Convection
d)
Conduction
12.
Which are the building blocks of technology, are embedded within larger?
a)
Mechanical toggle, x-box controller
b)
Wind, solar
c)
Television, stereo
d)
Pen, pencil
13.
Core technologies, which are the building blocks of technology, are embedded within larger:
a)
Political, ethical, and moral systems are not related to technology.
b)
Mechanical, structural, and electrical systems.
c)
Technological, social, and environmental systems.
d)
Optical, thermal, and fluid systems.
14.
Which represents an example of a fluid core technology systems?
a)
Remote control
b)
Fireplace
c)
Solar Panels
d)
Hydraulic Brakes
15.
Which is an example of an optical core technology system?
a)
Laser
b)
iPod
c)
Fish Tank
d)
Screwdriver
16.
Which components of the systems model provides information so the system can adjust its function?
a)
Input
b)
Feedback
c)
Output
d)
Process
17.
Which component of the systems model includes resources such as energy, capital, people, materials, tools and machines, and information?
a)
Input
b)
Feedback
c)
Output
d)
Process
18.
Which is a feedback mechanism for a system?
a)
The power button on a computer monitor
b)
The temperature setting knob on a refrigerator
c)
The progress bar when downloading a file on iTunes
d)
The center scroll wheel on a computer mouse.
19.
Which is an output of an email communication system?
a)
The computer used by the person sending the email
b)
The modem used for Internet connection
c)
The person sending the email
d)
The sent email
20.
Which is an example of a closed system?
a)
Clothes dryer
b)
Microwave
c)
Coffee Pot
d)
Motion-detecting exterior light
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