E-10 Final SJSU

In fitting a curve to data points, Excel provides a correlation value known as R2. The range for the R2 value is: 0 to 100% 0 to 1 0 to 100 -1 to +1

0 to 1

What unit does the sentence below define? "amount of energy required to change temperature of one gram of liquid water by one degree Celsius" 1 Watt 1 Joule 1 calorie 1 kW-hr 1 Calorie

1 calorie

If all people on Earth had the same consumption habits as Americans, how many Earths would be needed in order to provide what the world's population would consume? 1 Earth 50 Earths 6 Earths 2 Earths

6 Earths

The Extrusion command in 3D modeling program (SolidWorks) requires ...

A profile and a straight path

You have plotted the "column" graph that shows enrollment trends. Your boss tells you she is not happy with the legend. How should you fix it?

Change the word "Series 1" to 2003 and the word "Series 2" to 2010

Which one of the following expressions is power? Energy × time Force × acceleration Force × speed Speed × displacement Speed × time

Force × speed

The size of a reference plane created to sketch is: Has to be set in the option men 8.5 inch by 11.0 inch 216 mm by 280 mm Infinitely large

Infinitely large

A Joule equals N-m/sec Watt/sec Watt/sec^2 Kg-m N-m

N-m

What is the value of R at the end of this C code? x=4; y=5; z=8; x=x+y; R=y; if (x>y) { R=x; } if(z>x&&z>y) { R=z; } R=8 R=5 R=9 R=13 R=4

R=9

Which of the following heaters can heat up a gallon of water from 10oC to 100oC faster? 90 W heater 5 W heater Insufficient information All heaters listed will take the same amount of time 100 W heater

100 W heater

What answer will appear for the equation in cell C1?

140

The voltage across the power source in the circuit shown is V= 15 volts. What is the unknown current I?

15 amps

Given the following piece of C code, at the end of the 'while loop', what is the value of x? x=0; y=10; while (y>8) { y = y - 1; x=x+y; } 10 18 9 17 24

17

Given the following piece of C code, what is the value of control at the end of this program? int i; int control; control =1; i=1; while(control ==1) { i=i+1; if(i>2) { control =2; } if(i==2) { control =3; } } control =3 control =1 control =2

control =3

What answer will appear in cell D2?

more Pepsi lovers

Given the following piece of C code, how many times (n) does it loop through the while loop? int i; int control; control =1; i=1; while(control ==1) { i=i+1; if(i>2) { control =2; } if(i==2) { control =3; } } infinite n=3 n=2 n=0 n=1

n=1

What is the value of the binary number 01110? 10 6 14 8 12

14

There are 2 solar cells. Each one is capable of outputting 1 volt voltage and 2 Amp current. To obtain output of 4 Amp, how should these two cells be connected and what is the voltage? 2 cells in parallel, voltage = 2V 2 cells in parallel, voltage = 1V 2 cells in series, voltage = 2V 2 cells in series, voltage = 1V

2 cells in parallel, voltage = 1V

A 1000 kg car is capable of accelerating from 0 to 100 meter/second in 10 seconds. Among the following choices, which is the lowest possible power rating of the car's engine?

500kW

Given a wind energy machine with blades that sweep out a 150 mm diameter circle, and a wind speed of 10 m/s, approximately what is the maximum power extractable (i.e. taking into account the Betz limit)? Assume that the density of air is 1.2 kg/m3. Hint: Read the lecture PowerPoint.

6.3

Given a wind energy machine with blades that sweep out a 150 mm diameter circle, and a wind speed of 10 m/s, approximately what is the maximum power extractable (i.e. taking into account the Betz limit)? Assume that the density of air is 1.2 kg/m3. Hint: Read the lecture PowerPoint. 6.3 W 10.6 W 83.8 W 25.2 W 12.6 W

6.3 W

Approximately what percent of world energy use is fossil fuels? 85% 65% 50% 20% 98%

85%

If you drag cell C1 to cell C6, what will the answer be? 9 18 4 The question has an error. The $ shouldn't be there

9

The specifications for a product you are developing require that the cross-sesction area cannot be greater than 12 in2. You have summarized the dimensions of 5 prototypes you have made. Column D has an equation to determine if your product meets spcifications. It indicates that only specimen #5 meets the specifications. What is the equation in cell D5? =IF(B5*C5<12, "No","Yes") =IF(B5*C5>12, No,Yes) =IF(B5*C5>12, "No","Yes") =IF(B5*C5<12, No,Yes)

=IF(B5*C5>12, "No","Yes")

An inventory of parts in the ENGR 10 lab is shown in the figure. To calculate the total number of parts in the inventory what equation would you wirte in cell B8? sum(b2:b7) b2+b3+b4+b5+b6+b7 =sum(b2:b7) =sum(b2:b8) =sum(b2,b7)

=sum(b2:b7)

Given the following piece of C code, at the end of the program what is the value of A and B? A = 10 ; B = 12 ; if ((A + B) < 22) { B = A ; A = B; } else { A = B; B = A + B; } A= 10, B=10 A=12, B=22 A=12, B=10 A=12, B=24 A=10, B=22

A=12, B=24

What are the values of A and B at the end of this code? int A; int B; A = 2 ; B = 5 ; if ((A + B) > 7) { A = B ; B = A; } else { B = A*B; A = B+5; } A=5, B=2 A=10, B=5 A=10, B=10 A=15, B=10 A=5, B=5

A=15, B=10

Given the following piece of C code, at the end of the program what is the value of A and B? A = 7 ; B = 3 ; if ((A + B) <10) { A = B ; B = A; } else { B = A; A = B; } A=7, B=3 A=3, B=3 A=7, B=7 A=3, B=7 A=10, B=10

A=7, B=7

Which of the following heaters can heat up a gallon of water from 10oC to 50oC? 100 W heater 5 W heater All heaters listed will heat the water from 10oC to 50oC. Insufficient information 90 W heater

All heaters listed will heat the water from 10oC to 50oC.

Two structures with the same E and I are built to support a wind turbine. Structure A is twice as tall as structure B. Each is subjected to the same force F from the wind. Which of the following is true? B is 2 times stiffer than A A is 8 times stiffer than B Cannot answer this question with the information given. B is 8 times stiffer than A A is 2 times stiffer than B

B is 8 times stiffer than A

The plot contains data from a load deflection test. Three types of fits have been made to the data: linear, power, and log-linear. Why would you choose a particular trendline as the best fit? Largest R2 Both A and B The form of the equation may be controlled by physical theory

Both A and B

The following APA citation is in a student's reference list Huntzinger, D. N., Hutchins, M. J., Gierke, J. S., & Sutherland, J. W. (2007). Enabling sustainable thinking in undergraduate engineering education. Int. J. of Engineering Education, 23(2), 218-230. Match the parts of the citation. Huntzinger, D. N., Hutchins, M. J., Gierke, J. S., Sutherland, J. W. Enabling sustainable thinking in undergraduate engineering education. 23(2) Int. J. of Engineering Education 218-230

Huntzinger, D. N., Hutchins, M. J., Gierke, J. S., Sutherland, J. W. Authors Enabling sustainable thinking in undergraduate engineering education. Article Title 23(2) Journal Volume Int. J. of Engineering Education Journal Title 218-230 Page numbers

Engineers should follow their professional code of ethics because: It provides a clear definition of what the public has a right to expect from responsible engineers. It helps them avoid legal problems, such as getting sued. The public will trust engineers more once they know engineers have a code of ethics. It raises the image of the profession and hence gets engineers more pay.

It provides a clear definition of what the public has a right to expect from responsible engineers.

The set of commands shown is from GOTO_BEACON. In this list of commands, what does the following command do? SetDigitalOutput(14,freq); HINT: reread the programming C powerpoint from the lecture to understand how GOTO_BEACON works. Sets digital port 14 on the controller to 0, which tells the infrared detectors to receive a 1 KHz signal. Sets the freq variable to 14, which tells the infrared detectors to receive a 1 KHz signal. Sets component 14 on the IR board to 0, which tells the infrared detectors to receive a 1 KHz signal. Sets the freq variable to 14, which tells the infrared detectors to receive a 10 KHz signal. Sets digital port 14 on the controller to 0, which tells the infrared detectors to receive a 10 KHz signal.

Sets digital port 14 on the controller to 0, which tells the infrared detectors to receive a 1 KHz signal.

Choose the answer that best describes this circuit. Solar cells are in series. Calculate the total I in the circuit by adding the current in the two cells. The V is constant. Solar cells are in series. Calculate the total V in the circuit by adding the voltage in the two cells. The I is constant. Solar cells are in parallel. Calculate the total I in the circuit by adding the current in the two cells. The V is constant. Solar cells are in parallel. Calculate the total V in the circuit by adding the voltage in the two cells. The I is constant.

Solar cells are in series. Calculate the total V in the circuit by adding the voltage in the two cells. The I is constant.

The stiffness of an axially loaded bar (a bar in tension or compression as shown in the figure above) depends on...? Select all that apply (hint: review the structures and stiffness powerpoint lecture) The moment of inertia of the cross-section the bar (I) The cross sectional area of the bar The force acting on the bar. The length of the bar The stiffness of the material, represented by its Young's Modulus (E)

The cross sectional area of the bar The length of the bar The stiffness of the material, represented by its Young's Modulus (E)

What is the meaning of the Betz limit?

The maximum power the wind turbine can extract is 59.3% of theoretical wind energy

The Loft command in 3D modeling program (SolidWorks) requires ...

Two section profiles with or without a path

Select as many answers as you think are correct. Hint: Look at the PowerPoint from the lecture. The angle of attack ... Typically has values between 1 degree and 15 degrees for wind turbines. Affects the efficiency of the wind turbine. Is the angle between the chord line of the blade and the plane in which the rotor spins. Has no impact on the rotor design Typically has values between 15 degrees and 45 degress for wind turbines.

Typically has values between 1 degree and 15 degrees for wind turbines. Affects the efficiency of the wind turbine.

A student lifts a weight (W) using a motor powered by solar cells to determine the efficiency of the solar cell/motor system. On the power meter the voltage reads V and the current reads I. The student lifts the weight a distance H in a time T. What is the output power of this system?

W*H/T

A student performed an experiment to determine the relationship between speed and fuel economy (mpg). Which of the plots should the student choose from the "Insert Chart" menu to best display mileage as a function of speed?

X Y (Scatter)

The code shown is from the main Go To Beacon program. In this program, what does "While (1 = = 1) mean? while (1== 1) is an error. It should be while (1=1) while (1 == 1) will cause the program to loop through 1 time while (1== 1) will cause the program to loop an infinite number of times

while (1== 1) will cause the program to loop an infinite number of times

A current of 4 Amps is flowing through a 2Ω resistor. How much power is dissipated by the resistor? 16W 32W 8W 4W 2W

32W

The current in the circuit shown is I= 2 Amps. What is the voltage across the power source? 4 V 8 V 5 V 20 V 10 V

20 V

A small wind turbine with 0.15 m blade is able to generate 2.5 volt while supplying 2 Amp of current at a wind speed of 10 meter/second. Which of the following numbers is closest to the efficiency of this turbine at this operating condition? (Hint: "Betz limit" sets the maximum possible efficient to 59%).

20%

Given a wind energy machine with blades that sweep out a 10 m diameter circle, and a wind speed of 2 m/s, approximately what is the maximum power extractable (i.e. taking into account the Betz limit)? Assume that the density of air is 1.2 kg/m3. Hint:Read the lecture PowerPoint. 224 W 447 W 377 W 44.7 W 894 W

224 W

A turbine design team has made the graph below from collected data. What is the stiffness of this team's turbine tower?

29.3 N/mm 29.3 KN/m

You have designed a cantilever wood beam of length L. You intially use a 2 in X 4 in member, but decide that it isn't stiff enough. You increase the height of the beam from 4 inches to 6 inches. If the initial siffness is K, what is the new stiffness? Hint: Read the stiffness PowerPoint from the lecture. 4.5K 6K 1.5K 2K 3.4K

3.4K

A student weighs 140 lb. This student is able to run up to the 3rd floor in 20 seconds. The 3rd floor is 10 meters above the ground floor. Which of the following values is closest to the average power this student exerted in climbing the stairs? 310 W 280 W 230 W 150 W 70 W

310 W

A current of 4 Amps is flowing through a 2Ω resistor. How much power is dissipated by the resistor? 4W 16W 32W 8W 2W

32W

The structure shown in the figure has a height L, a moment of inertia I, and a modulus of elasticity E. A load F is applied at the top of the structure. What is the stiffness of this structure?

3EI/L3

Wind turbine B has blades twice as long as wind turbine A. If they are subjected to the same wind, what is the relationship between the power from turbine A (PA) and the power from turbine B (PB)? PA = 4 PB 4 PA = PB PA = 2 PB 8 PA = PB 2 PA = PB

4 PA = PB

This circuit contains a 36 V battery. 12 A of current flows through the circuit. Which of the following values is closest to the power in this circuit? 432 W 108 W 12 W 36 W 3 W

432 W

If you were to design and construct five identical turbine towers, but use a different material for each one, which would be the stiffest? 7075 aluminum Douglas fir graphite ceramic 4340 steel Polypropylene

4340 steel

If you want to design a high efficiency wind turbine, which of the following efficiency values is reasonable as your design goal?

45%

In the lab you measreed a wind speed of 20 mph on your turbine. Convert this to m/s. 536 m/s 32,200 m/s 8.9 m/s 44.8 m/s

8.9 m/s

A student performed an experiment to determine the relationship between speed and fuel economy (mpg). Excel created the plot shown below using the "chart wizard". What would you do to improve this plot? Check all answers that apply. Delete the plot legend because there is only one set of data Add a label to the x axis Add a label to the y axis Modify the plot title so it more clearly explains what is in the plot

Delete the plot legend because there is only one set of data Add a label to the x axis Add a label to the y axis Modify the plot title so it more clearly explains what is in the plot

When you combine P-type and N-type silicon in a solar cell, what happens? (image from www.solarpath.org) Electrons rush from N to P leaving the N side empty. Electrons at the N-P junction eventually form a barrier in the form of an electric field. Nothing happens. Electrons rush from P to N leaving the P side empty.

Electrons at the N-P junction eventually form a barrier in the form of an electric field.

A kilowatt-hour is a unit of power. True False

False

The process of making multiple copies of a feature (like a turbine blade on a hub) in SolidWorks is called, 'lofting'. True False

False

What is the value of R at the end of this C code? x=4; y=5; z=8; x=x+y; R=y; if (x>y) { R=x; } if(z>x&&z>y) { R=z; } R=9 R=13 R=8 R=5 R=4

R=9

The first and foremost obligation of registered professional engineers is to: Their client Their employer The government The public welfare The engineering profession

The public welfare

A bumper switch is mounted to a robot. The bumper switch is connected to digital input port #2. The right wheel is attached to motor port 2 and the left wheel is attached to motor port 3. The following program is used to control this robot. bumper = GetDigitalInput(2); SetPWM(2,50); SetPWM(3,-50); while (1== 1) { if (bumper ==0) { SetPWM(2,-50); SetPWM(3,50); } }

The robot will move backward forever regardless if the bumper hit something or not.

Which of the following statements is false? The solar cell's voltage varies with output power. The solar cell's voltage varies with output current. The solar cell's output current varies with load The solar cell's maximum output power is its maximum output voltage times its maximum output current. Pmax = Vmax x I max

The solar cell's maximum output power is its maximum output voltage times its maximum output current. Pmax = Vmax x I max

Only PEs can sign and seal engineering drawings True False

True

The following book reference is correctly formatted according to APA author-date format: Fleddermann, C. B. (2008). Engineering ethics (3rd Ed.). Upper Saddle River, NJ: Prentice Hall. True False

True

When evaluating the moral status of performing an action it is important to consider consequence and intentions. True False

True