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PLTW Semester Exam

Total questions: 88

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

_________________ involves the design, construction, and operation of a robot.

a)

Robotics

b)

Automation

c)

Assembly line

d)

Manufacturing

2.

A ______________ is a machine that performs complicated tasks and is guided by automatic controls.

a)

Robot

b)

Cyborg

c)

Tank

d)

TV

3.

2nd generation robots perform more complex tasks and ____________________________.

a)

simulate human functions

b)

mass production

c)

automated functions

d)

became sentient

4.

Robots can be used for...

a)

Precision work

b)

Exploration

c)

Repetitive or dangerous work

d)

All of the above

5.
What does STEM stand for?
a)
systems, technology, engineering, math
b)
science, technology, engineering, math
c)
science, technology, energy, modeling
6.

All robots look like humans.

a)

True

b)

False

7.

Robots and automated machines both

a)

Run a computer program

b)

Move around on wheels

c)

Look like humans

d)

Have laser sensors

8.

What is Algorithm?

a)

A step-by-step procedure for solving a problem, especially by a computer

b)

A human robot

9.

Power systems that use pressurized air to create the force a robot uses to function

a)

Anthrobot

b)

Pneumatic

c)

Hydraulic

d)

Manipulator

10.

CAD

a)

a device that applies force to an object

b)

the air-like hardware that allows a robot to interact with its environment

c)

a graphic design program used to create building and product plans

d)

the side to side motion of a robot

11.
The ___ is an input gear that transmits power and motion to the rest of the system.  
a)
bevel gear
b)
driven gear
c)
drive gear
d)
none of the above
12.
2 or more pieces arranged so that the motion of one complies the motion of the others is a __.
a)
mechanism
b)
force
c)
torque
d)
sprocket
13.
Which of the following is NOT an advantage for using an automated system?
a)
safety
b)
increased productivity
c)
eliminate human jobs
d)
increased accuracy
14.
Which mechanism changes rotary motion to reciprocating motion?  
a)
worm and wheel
b)
chain drive
c)
crank and slider
d)
simple gear train
15.
If the ouput gear is smaller than the input gear, the speed will  
a)
decrease
b)
increase
c)
stay the same
16.
A gear between the drive gear and the driven gear that changes rotational direction is the 
a)
idler
b)
bevel
c)
pinion
d)
gear ratio
17.
A back and forth motion is called  
a)
rotary
b)
reciprocating
c)
oscillating
d)
linear
18.

What do you think PLTW stands for?

a)

Potential Leaders Try Working

b)

Project Lead the Way

c)

Pick Level to Write

d)

Play like the warriors

19.

What does CTE stand for?

a)

Career and Technical Education

b)

Change Trials Everyone

c)

Crunch Time Elsewhere

d)

Science

20.
A comparison of the number of teeth of one gear to another.
a)
gear total
b)
gear purpose
c)
gear ratio 
21.

A force in a circular direction is called

a)

rotary motion.

b)

torque.

22.
Movement in a circular motion
a)
Rotary 
b)
Oscillating
c)
Linear
d)
Reciprocating
23.
Movement that goes back and forth in a straight line
a)
Rotary
b)
Linear
c)
Oscillating
d)
Reciprocating 
24.
Movement along an arched path; back and forth
a)
rotary
b)
oscillating
c)
reciprocating
d)
linear
25.
The gear train in which diagram provides more torque?
a)
A
b)
B
26.

Is the first step in the design process. Includes the problem being identified, validated, and justified. The design requirements are determined and the design brief is created.

a)

prototype

b)

Valid

c)

define the problem

d)

present solution

e)

construct/test prototype

27.
This step in Design process includes researching past solutions and brainstorming possible new solutions. Selecting an approach using a Decision Matrix.
a)
generate concepts
b)
Justifiable
c)
Brainstorm
d)
Iterative
e)
evaluate solution
28.

This step in Design process includes creating a detailed design solution and detailed technical drawings.

a)

present solution

b)

define the problem

c)

Valid

d)

Prototype

e)

develop solution

29.
This step in Design process includes building the a testable prototype. Then testing it for performance/ usability/ durability, collecting the data, analyzing the date and creating a test report of the findings.
a)
construct/test prototype
b)
generate concepts
c)
Justifiable
d)
Brainstorm
e)
Iterative
30.
This is the last step in the Design process and is when the project portfolio is shared usually during a formal presentation.
a)
present solution
b)
construct/test prototype
c)
generate concepts
d)
Justifiable
e)
Brainstorm
31.

A process that repeats a series of steps over and over until the desired outcome is obtained.

a)

evaluate solution

b)

iterative

c)

develop solution

d)

define the problem

e)

Valid

32.

A group technique for solving problems, generating ideas, stimulating creative thinking, etc. by unrestrained spontaneous participation in discussion

a)

define the problem

b)

Iterative

c)

evaluate solution

d)

develop solution

e)

brainstorm

33.

Capable of being shown as reasonable or merited according to accepted standards

a)

develop solution

b)

Brainstorm

c)

Iterative

d)

evaluate solution

e)

justifiable

34.

Well- founded on evidence and corresponds accurately to the real world.

a)

construct/test prototype

b)

Prototype

c)

present solution

d)

valid

e)

generate concepts

35.
Using the picture, which part is being shown?
a)
slider
b)
base plate
c)
cortex
d)
metal rack
36.
Using the picture, which part is being shown?
a)
plastic collars
b)
screws
c)
nuts or bolts
d)
metal collars
37.
What is this VEX Robot part?
a)
Spur Gear
b)
Wheel
c)
Sprocket Gear
d)
Bevel Gear
38.
What is this VEX Robot part?
a)
Spur Gear
b)
Axel
c)
Sprocket Gear
d)
Bearing Plate
39.
What is this VEX Robot part?
a)
Allen Wrench
b)
Spur Gear
c)
Vex Collar Shaft
d)
Axel
40.
What is this VEX Robot part?
a)
Vex Cortex
b)
Vex Axel
c)
Vex Collar Shaft
d)
Vex " C " Channel
41.
What is this VEX Robot part?
a)
Vex Sprocket Gear
b)
Vex Motor Controller
c)
Vex Spur Gear
d)
Vex Worm Gear
42.

The following are examples of cyber-bullying:

a)

Saying something about someone, you wouldn't say to their face.

b)

Posting things that would hurt someone else's feelings.

c)

Sharing something without permission.

d)

All of the above.

43.

The following is an example of positive digital citizenship:

a)

Reporting in-appropriate behavior.

b)

Avoiding bullies.

c)

Befriending strangers.

d)

Posting things about someone else.

44.

Make sure websites are secure by looking for ___________.

a)

The lock in the web address bar.

b)

user agreement on the website.

c)

about section.

d)

an open lock in the address bar.

45.
What is a digital footprint?
a)
A picture of a footprint on the Internet.
b)
Your username and passwords.
c)
Something that is really easy to erase.
d)
Information you share about yourself on the Internet.
46.

Copyright…

a)

Protects the owners of creative work by requiring others to get permission before using it

b)

Allows creative work to be copied and used by anyone online

c)

Protects Internet users who copy and share downloaded content

47.

What does digital citizenship mean?

a)

Any information about you on the Internet.

b)

An online membership.

c)

Using digital media safely, responsibly, and ethically.

d)

Not giving credit to someone else's work.

48.
If the small gear is driving the large gear, what is happening to the torque?
a)
Increase
b)
Decrease
c)
Remains constant
d)
Not enough information
49.
What happens to speed
when you increase torque?
a)
Speed Increases
b)
Speed decreases
c)
Speed stays the same
50.
What is the name of this mechanism?
a)
Crank and Slider
b)
Cam and Shaft
c)
Belt Drive
d)
Worm Gear
51.
What is the name of this mechanism?
a)
Worm and Wheel
b)
Chain Drive
c)
Cam and Shaft
d)
Lead Screw
52.
What is the name of this mechanism?
a)
Lead Screw
b)
Meshed Gear
c)
Rack and Pinion
d)
Crank and Slider
53.
What is the input movement of this mechanism?
a)
Rotary
b)
Linear
c)
Reciprocating
d)
Oscillating
54.
What is the input movement of this mechanism?
a)
Rotary
b)
Linear
c)
Reciprocating
d)
Oscillating
55.
If torque increases, speed ___________.
a)
Increases
b)
Decreases
c)
Remains Constant
56.
The following is an image of a hand mixer.  When the crank is turned the beaters rotate towards each other.  What is the input and output motions?
a)
Input=rotary
Output=rotary
b)
Input=oscillating
Output=Linear
c)
Input=Reciprocating
Output=Rotary
d)
Input=Rotary
Output=Linear
57.
The image shown is an ice cream scoop.  As the lever is pressed, the center scoop moves along the scoop itself.  What is the input and output motions?
a)
Input=rotary
output=rotary
b)
input=oscillating
output=oscillating
c)
Input=rotary
output=oscillating
d)
input=rotary
output=linear
58.
Name this mechanism
a)
Simple Gear Train with Idler
b)
Chain Drive
c)
Simple Gear Train
d)
Beveled Gears
59.
Name this mechanism
a)
Crank and Slider
b)
Cam and Follower
c)
Rack and Pinion
d)
Worm and Wheel
60.
Name this mechanism
a)
Crank and Slider
b)
Cam and Follower
c)
Rack and Pinion
d)
Worm and Wheel
61.
What type of output movement does this mechanism have
a)
Linear
b)
Oscillating
c)
reciprocating
d)
Rotary
62.
What type of output movement does this mechanism have
a)
Linear
b)
Oscillating
c)
reciprocating
d)
Rotary
63.
What is the gear ratio of these meshed gears if the input gear has 36 teeth?
a)
36:60
b)
60:36
c)
3:5
d)
5:3
64.
What is the angle of input to output?
a)
Parallel
b)
Perpendicular
c)
90 degrees
65.
The input gear in the image is the larger gear.  Calculate the gear ratio.  
a)
4:6
b)
6:4
c)
2:3
d)
3:2
66.
When gears are equal in size, what happens to the speed and torque?
a)
Speed increases; torques decreases
b)
Speed decreases; torque increases
c)
Speed and torque are constant
67.
What is the name of this part?
a)
Keps Nut
b)
Nylock Nut
c)
Screw
d)
Collar
68.
What is the name of this part?
a)
Sprocket
b)
Spur Gear
c)
Wheel
d)
Bevel Gear
69.
What is the name of this part?
a)
Screw
b)
Nail
c)
Thingy
d)
Keps Nut
70.
What are most parts of the VEX Structure subsystem made of?
a)
Rubber
b)
Plastic
c)
Bent Sheet Metal
d)
Gold
71.
Iterative most closely means:
a)
Easy
b)
Building and Rebuilding
c)
Slow
d)
Programming
72.
VEX 8-32 screws are attached using which tool?
a)
Pliers
b)
Hammer
c)
Glue
d)
Allen Wrench
73.
A push or pull in a straight line
a)
Force
b)
Torque
74.
What provides a low friction area for shafts to rotate in?
a)
Standoff
b)
C Channel
c)
Nylock Nut
d)
Delrin Bearing
75.
What is this VEX Robot part?
a)
Spur Gear
b)
Wheel
c)
Sprocket Gear
d)
Axel
76.

What VEX part is this?

a)

gusset

b)

spacer

77.
What's the name of the robotics we are using?
a)
VEX
b)
TEXMEX
c)
CHEX
d)
HEX
78.
Name this part.
a)
chassis rail
b)
slide track
c)
sprocket 12 tooth
d)
C-channel
79.
Name this part.
a)
plate structure
b)
brain (microcontroller)
c)
lead screw rider
d)
nylock nut
80.
Name this part.
a)
L-structure
b)
angle structure
c)
worm wheel
d)
60 degree bevel gear (acute)
81.
Name this part.
a)
spacer
b)
nylock nut
c)
washer
d)
worm wheel
82.
Name this part.
a)
shaft or axle
b)
slotted structure
c)
winch pawl
d)
keps nut
83.
Name this part.
a)
pillow block bearing
b)
small bracket
c)
shaft or axle
d)
intake roller
84.
Name this part.
a)
universal joint
b)
tread conveyer belt link
c)
gear 60 tooth
d)
cam and follower mount
85.
Name this part.
a)
chain
b)
tread link
c)
cam
d)
base plate
86.
Name this part.
a)
hand crank
b)
bar structure
c)
single bogie idler
d)
bearing (flat)
87.
Name this part.
a)
cam
b)
double bogie idler
c)
C-channel
d)
ports
88.
Name this part.
a)
follower
b)
393 motor
c)
high speed wheel
d)
gear 60 tooth

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