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POE Q2 Exam 2025

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Last updated 20 days ago
30 questions
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Question 1
1.

Question 2
2.

Question 3
3.

Question 4
4.

Question 5
5.

Question 6
6.

What is Convection?

Question 7
7.

Question 8
8.

Question 9
9.

If the radius of the circle is 2 inches, what is the y-coordinate of the centroid of this half circle?

Question 10
10.

Match definitions with the appropriate answers.

Draggable itemarrow_right_altCorresponding Item
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Question 11
11.

Question 12
12.

Question 13
13.

Question 14
14.

Question 15
15.

Question 16
16.

The moment of inertia for a 12 foot long by 3 inch wide and 4 inch high oak board would be

Question 17
17.

Question 18
18.

Question 19
19.

Question 20
20.

Question 21
21.

Question 22
22.

Question 23
23.

Question 24
24.

Question 25
25.

Find RAy and RBy if A is the pivot point.

Question 26
26.

What is the reaction force at the end of the roller connection? The given force is in pounds and each grid line is equal to 1 foot.

Question 27
27.

Question 28
28.

Question 29
29.

Question 30
30.

A motor running a winch system can lift a 3N load 6 meters in 60 seconds while running at an average of 9 volts and drawing 500 mA. What is the efficiency of the system?

Calculate the current at R2.

25.5 mA
17.4 mA
36 mA
7.2 mA
3.6 mA
If a student lifts a 225.4N ball 1.202 m in 20 sec, how many joules of work did the student complete?
5418 J
271 J
11 J
188 J
14 J
3750 J
330 J
What is Biomass?
A natural fuel such as coal of gas, formed in the geological past from the remains of living organisms.
A dynamo or similar machine for converting mechanical energy into electricity.
A resource that cannot be replaced once used.
The production of electricity in conductors with the use of magnets.
Energy produced by animal power such as sled dogs or a horse drawn plow.
The use of heat form within the Earth or from the atmosphere near oceans.
Plant materials and animal waste used especially as a source of fuel.
What is Geothermal Energy?
A natural fuel such as coal of gas, formed in the geological past from the remains of living organisms.
The use of heat from within the Earth.
Energy produced by animal power such as sled dogs or a horse drawn plow.
The production of electricity in conductors with the use of magnets.
A resource that cannot be replaced once used.
Plant materials and animal waste used especially as a source of fuel.
A dynamo or similar machine for converting mechanical energy into electricity.
The U-value of a material measures the ability of the material to _________ heat. The ______ the value the better the material will conduct heat.
Resist, Higher
Conduct, Lower
Create, Lower
Create, Higher
Resist, Lower
Conduct, Higher
Absorb, Higher
Absorb, Lower
Process by which, in a fluid being heated, the warmer part of the mass will rise and the cooler portions will sink.
Stages a product goes through from concept and used to eventually withdraw from the marketplace.
The measure of resistance to heat flow..
Refers to the property of a thermodynamic system in which all parts of the system have attained a uniform temperature which is the same as that of the system's surroundings.
A type of system that uses circulating pumps and fans to collect and distribute heat.
A property of an object which determines the direction of heat flow when the object is placed in thermal contact with another object.
What is Energy?
The ability to do work.
Process by which, in a fluid being heated, the warmer part of the mass will rise and the cooler portions will sink.
Individual fuel cells that are combined in series.
Individual fuel cells that are combined in parallel.
Stages a product goes through from concept and used to eventually withdraw from the marketplace.
The flow of electrical power or charge.
A property of an object which determines the direction of heat flow when the object is placed in thermal contact with another object.
Calculate the total resistance of the circuit.

531 ohms
103.1 ohms
5970 ohms
346.6 ohms
1020 ohms
475.5 ohms
1.31 ohms
1.333 in
0.750 in
0.667 in
0.849 in
1 in
8.378 in
A measure of the tendency of a force to rotate around a point.
Centroid
An indicator of the stiffness of a material related to its size and orientation. The higher the value, the harder it is to make an object bend.
Free Body Diagram
The geometric center of an object.
Moment
An indicator of the stiffness of a material related to its material properties. The higher the value, the harder it is to make an object bend.
Static Equilibrium
A diagram that shows all of the forces acting on an object.
Modulus of Elasticity
When an object is at rest or is moving at a constant velocity.
Moment of Inertia
A machinist is using a 6 inch long wrench to tighten a 1/4 inch bolt. What is the moment (in foot-pounds) if he applies 175 pounds of force to the wrench?
43.75 ft-lb
262.5 ft-lb
-43.75 ft-lb
-153 ft-lb
-262.5 ft-lb
87.5 ft-lb
-87.5 ft-lb
153 ft-lb
If a 250 pound man walks on a 3" x 6" board (3" is the height) that is 5 feet long and deflects the board 0.25 inches, what is the modulus of elasticity?
333,333 psi
83,333 psi
193 psi
93 psi
451,675 psi
67,500 psi
24,412 psi
48 psi
If a vector is 30 degrees from the horizon and the force of the vector is 150 pounds, what is the x-component of the vector?

300 pounds
23.1 pounds
75.0 pounds
173.2 pounds
150 pounds
If you were standing in the middle of a 2" x 4" beam (the height is 4") across a 20 foot wide ditch, how much would the beam bend? Assume that you weigh 150 pounds and that the modulus of elasticity of the beam is 1.76 x 106 psi.
0.50 in
0.001 in
9.20 in
0.72 in
6.50 in
1.74 in
2.30 in
8.33 in
In the free body diagram, what is missing?

a horizontal reaction force and a vertical reaction force at B
a single horizontal reaction force at B
a single normal force at A
a single vertical reaction force at B
a single applied force at C
16 in4
144 in4
1728 in4
6 in4
9 in4
432 in4
Two people are pulling on a boat trying to pull it out of the water. Each person has a rope attached to the front end of the boat. One person is pulling with 150 pounds of force straight out of the water (following the x-axis). The other person is pulling the boat with 200 pounds of force at a 45 degree difference than that of the first person. What is the resultant force applied to the boat?

206.1 pounds at a 43.3 degree angle from the positive x-axis
291.4 pounds at a 25.9 degree angle from the positive x-axis
141.42 pounds along the x-axis
323.9 pounds at a 64.1 degree angle from the positive x-axis
323.9 pounds at a 25.9 degree angle from the positive x-axis
350 pounds at a 45 degree angle from the positive x-axis
291.4 pounds at a 64.1 degree angle from the positive x-axis
350 pounds along the x-axis
To find the x-value and the y-value for the centroid of a right triangle, you do the following from the corner containing the right angle.
1/3 of the base and 2/3 of the height
2/3 of the base and 1/3 of the height
1/2 of the base and 1/3 of the height
1/2 of the base and 1/4 of the height
1/2 of the base and 1/2 of the height
1/4 of the base and 1/4 of the height
1/3 of the base and 1/3 of the height
Calculate the total energy transfer in Joules for a wall section measuring 3 m x 5 m by 0.03 m thick with a thermal conductivity of 0.10 J/(s*m*C). Opposing sides of the wall section have a temperature of 20 degrees Celsius and 15 degrees Celsius after one hour.
30,000,000 J
300,000 J
250 J
15,000 J
1,200,000 J
900,000 J
180,000 J
A block of aluminum at 90 degrees Celsius is placed in 2.00 liter (2 kg) of water at 15 degrees Celsius. Calculate the energy transferred to the water if the final temperature becomes 37 degrees Celsius. The specific heat capacity of water is 4186 J/(kg*C).

184,184 J
309,764 J
125,580 J
92,092 J
215,703 J
Given the information above, what is the R-value of the wall section at a point through the fiberglass batt?

27.56
26.76
34.61
27.73
19
32.47
15.61
31.42
What is the total current in the given in a simple circuit with 3 resistors (413 ohms, 1.3 kilo-ohms, and 0.513 kilo-ohms)?

594.3 amps
185.5 amps
0.0289 amps
0.0054 amps
2226 amps
0.0202 amps
414.813 amps
0.0114 amps
A student travels on a school bus in the middle of winter from home to school. The school bus temperature is 53 degrees Fahrenheit. The student's skin temperature is 92.4 degrees Fahrenheit. Determine the total energy transferred from the student's body during the 20 min ride to school due to electromagnetic radiation. Note: Skin emissivity is 0.90, and the surface area of the student is 1.60 m2. Don't forget to convert those temps to Kelvin!
6368 J
84,400 J
640,000 J
4271 J
514,000 J
115,440 J
310,700 J
221,900 J
3698 J
215,400 J
What unit is constant in a series circuit?
current
resistance
power
ohms
energy
valence electrons
voltage
RAy = 24.5 and RBy = 10.5
RAy = 81.7 and RBy = 45.3
RAy = 0 and RBy = 10.5
RAy = 70 and RBy = 105
Calculate the magnitude and direction of the resultant force.

70 N, 27 degrees CCW from positive x-axis
70 N, 73 degrees CCW from positive x-axis
47 N, 55 degrees CCW from positive x-axis
53 N, 44 degrees CCW from positive x-axis
47 N, 35 degrees CCW from positive x-axis
Find the reaction force at B.

295 lbs
266.67 lbs
1000 lbs
166.67 lbs
133.33 lbs
233.33 lbs
250 lbs
500 lbs
In the figure below, the Teenage Mutant Ninja Turtles are balancing on a beam waiting to destroy the Shredder. They are standing balanced in order from left to right: Leonardo (50N), Michelangelo (47 N), Donatello (29 N) and Raphael who didn't weigh in so we don't know his force. Determine Raphael's force in Newtons.

58.6 N
410 N
53.67 N
178 N
68 N
6.67%
0.15%
85%
30%
4.7%
16.8%