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POE EOC Review
POE EOC Review
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PLTW POE Final Test Review
Flashcards
57 cards
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Practice quiz
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Questions
57
Answers
1
A Mechanical Advantage of 4:1 means what?
Effort force is 4 times less and Resistance
Effort and Resistance force are equal
Resistance distance is 4 times greater
Resistance force is 4 times less than the effort force
2
The collection and analysis of numerical data in large quantities is known as _____
Probability
Statistics
Pneumatics
Hydraulics
3
Which CLASS of lever is shown here?
No Class
Class 2
Class 3
Class 1
4
As the resistance
increases
, what happens to the current?
increases
decrease
reverses
stays the same
5
An 5' umbrella is being rotated by its .25" diameter axle/handle. Which value is De?
5'
.25'
.25"
60"
6
What is the
efficiency
of a machine that has an
IMA = 10
, but an
AMA = 7.5
?
133%
100%
25%
75%
7
100% efficiency is impossible
False
True
8
Middle value of a set of values arranged in order of magnitude is known as ___
mode
average
median
mean
9
A
110 [Ω]
light bulb plugged into the wall has a current of
2 [amps].
What is the
voltage
?
0.01818 [V]
55 [V]
110 [V]
220 [V]
10
What is the
gear ratio (C/A)
? (A = 30, B = 90, C = 15)
1/2
3/4
4
3
11
What is the IMA of the screw if using an 8in long wrench?
7.8
2.51
2010
1005.31
12
Locate the centroid of the following 6x4 rectangle.
(2, 3)
(3, 2)
(4, 6)
(6, 4)
13
amperes are symbolized as A
True
False
14
What is the IMA of the fixed pulley?
2:1
.5:1
1:1
10:1
15
What is the final gear ratio?
2:1
5:1
1:1
20:1
16
geothermal energy uses energy from within the earth
True
False
17
In circuits, what is the
unit
for resistance?
Amp
Ω
R
V
18
biomass is a source of energy other than plant materials and animal waste
False
True
19
What is the Resistance Distance?
2.29 in
82.5 in
2.72 in
13.2 in
20
nonrenewable energy cannot be renewed once used
False
True
21
How much work is accomplished pushing a box with
45 [N]
for
5 [m]:
225 [J]
9 [J]
0.1111 [J]
45 [N]
22
What is the
total resistance
of the circuit?
3.0 [Ω]
1.0 [Ω]
6.0 [Ω]
0.545 [Ω]
23
What is the AMA of the Inclined Plane?
2.5:1
3.75:1
5:1
0.4:1
24
When drawing a free body diagram which direction is the gravity force going.
→
↙
↓
↘
25
What is the IMA of the moveable pulley?
10:1
.5:1
1:1
2:1
26
What is the
total resistance
of this circuit?
18 Ω
0.5 Ω
6 Ω
2 Ω
27
Calculate the moment about point N.
32 [Nm]
45 [Nm]
20 [Nm]
25 [Nm]
28
electrical energy is caused by the movement of protons
False
True
29
A screw is composed of what two simple machines?
Incline Plane & Wedge
Wedge & Wheel and Axle
Inclined Plane & Wheel and Axle
Pulley & Screw
30
Three machines, (
MA
1
= 3
,
MA
2
= 2
,
MA
3
= 6
). What is the
total MA
of the compound machine?
36
2
11
6
31
What is the Mechanical Advantage of this simple machine?
100 cm
0.1
10
10 cm
32
ohms are symbolized as O
False
True
33
What is the AMA if the wheel is driving the axle?
70:1
2:1
0.35:1
2.86:1
34
What is the
TOTAL GEAR RATIO
of the compound gear. (A = 16, B = 32, C = 14, D = 42)
2
3
6
1
35
What does the middle number stand for?
Length
Diameter
Threads per inch
Radius
36
Which CLASS of lever is shown here?
Class 1
No Class
Class 2
Class 3
37
The current of a circuit equals:
V / R
R / V
I X R
V x R
38
How much effort does the arm feel
100 [lbs]
900 [lbs]
300 [lbs]
3 [lbs]
39
What formula would you use to find the length of the incline?
AMA = FR/FE
a2 + b2 = c2
CosƟ = Adj/Hyp
IMA = L/H
40
In which zone is the centroid most likely to be found?
0 < x < 2
4 < x < 5
2 < x < 4
5 < x <7
41
What is the Mechanical Advantage of the Pulley?
3
4
1
2
42
Fossil fuels are an alternative energy source.
True
False
43
What is the IMA of the block and tackle pulley?
5:1
6:1
3:1
4:1
44
What is the Mechanical Advantage of this inclined plane?
65/16
16/65
65/63
63/16
45
Select the correct formula. If gear A turns with 30 rpm, what is speed of gear D?
Gr/1=Wout/Win
Gr/1 = Win/Wout
Gr/1=Tout/Tin
Gr/1=Tin/Tout
46
What is the current in this circuit?
0.1667 [A]
120 [A]
6 [A]
2400 [A]
47
What is the final gear ratio?
4:1
10:1
2.5:1
20:1
48
volts are symbolized as V
False
True
49
volts are symbolized as V
True
False
50
Locate the centroid of the following triangle.
(4.5, 1.5)
(6, 1)
(3, 1)
(9, 3)
51
Locate the centroid of this circle with a diameter of d=6.
(3, 1.273)
(1.5, 1.5)
(3, 3)
(0,0)
52
inexhaustible energy eventually runs out
False
True
53
What is the IMA of the Wedge?
5:1
3.33:1
0.3:1
.5:1
54
Which CLASS of lever is shown here?
Class 1
Class 3
Class 2
No Class
55
coal is an example of a fossil fuel
False
True
56
What is the IMA of the Inclined Plane?
10:1
3.75:1
2.5:1
0.4:1
57
Using an ammeter, you measured
5 amps
. What did you measure?
Voltage
Resistence
Current
Power
