Engr10 Final Review

What value is returned when a bumper switch is pressed?(See Sensors Section of VEX Manual) 1 0

0

A current of 2 Amps is flowing through a 3Ω resistor. How much power is dissipated by the resistor? 2W 12W 6W 16W 3W

12W

The number 90 is currently in cell A1. If you now click on the % sign in the Excel menu, what will the number in cell A1 be? 90% 9000% 0.90 900%

9000%

What is the meaning of the Betz Limit? (This can be answered by reviewing the Powerpoint on Wind Power and Wind Turbines.) The efficiency is 0.35 The maximum efficiency is 0.59 The maximum efficiency is 0.95 The minimum efficiency is 0.59

The maximum efficiency is 0.59

A servo controls position and a motor controls speed True False

True

As resistance is decreased, more current is drawn from the wind turbine generator. True False

True

The "emerging adulthood" developmental phase was defined relatively recently because people grow up differently these days. -True -False

True

The LED is a polarized device. (See Robot Guidelines) True False

True

Emerging adulthood is less common in: cities with lots of universities socially and politically liberal states very wealthy communities socially and politically conservative states

socially and politically conservative states

The transition from youth (or emerging adulthood) to adulthood is more likely to be smooth and non-stressful in: in societies where youth have strong personal identities societies where youth have strong cultural identities traditional (continuous) societies modern (discontinuous) societies

traditional (continuous) societies

Given the following piece of C code, at the end of the program what is the value of x and y? x=0; y=1; while (x<9) { y = y + x;x=x+4; } x=12, y=12 x=8, y=37 x=8, y=13 x=12, y=13 x=8, y=5

x=12, y=13

Rotors designed using lift to generate rotation spin at lower speeds than rotors designed using drag to generate the rotation. True False

False

This question can be answered by looking at the Wind Turbine Project Guidelines The top plate can be oriented at 45o to the bottom plate. False True

False

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 The cross sectional area of the bar The force acting on the bar. The stiffness of the material, represented by its Young's Modulus (E) The length of the bar The moment of inertia of the cross-section the bar (I)

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

This question can be answered by looking at the Wind Turbine Project Guidelines The wind turbine report project summary goes before the table of contents. False True

True

Using the motor module without the clutch can destroy the motor True False

True

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 =2 control =3 control =1

control =3

Conley and Lehman's comment that heightened cardiovascular activity earlier in life places a person at increased risk for later cardiovascular disease, is an example of: genetic inheritance development in one period influencing development in a later period none of these how the environment is the only factor that matters for aging successfully

development in one period influencing development in a later period

Which of the following components of educational achievement is most predictive of occupational achievement? school performance Intelligence Quotient educational attainment academic achievement

educational attainment

There are many factors that impact educational achievement. Which of the following does not influence educational achievement? ethnicity gender parent involvement socio-economic status (SES)

gender

Given the following piece of C code, at the end of the program what are the values of i and y? int i; int y; i=0; y=1; while (i<5) { i=i+2;y = y + i; } none of these answers i=6, y=13 i=4, y=3 i=6, y=7 i=4, y=7

i=6, y=13

The wind is blowing at a velocity v (say 10 mph) and generates power P. If the wind velocity doubles, what happens to the generated power? increases by factor of 4 increases by factor of 6 increases by factor of 2 increases by factor of 8 increases by factor of 3

increases by factor of 8

You wrote a paper this semester. Submitting that paper to two classes... Hint: Look at University Policy S07-2 -is not academic dishonesty. You wrote the paper, so you should be able to do what you want with it. -is prohibited by university policy. -is allowed if both instructors agree that you may submit it in both classes. -is allowed if the instructor of the second class you submit it to agrees.

is allowed if both instructors agree that you may submit it in both classes.

When one says that human characteristics change in multiple ways over time, it is referring the concept that lifespan human development is: ecological multi-directional multi-disciplinary evolutionary

multi-directional

Given the nature of college student hooking-up, it becomes very clear that sexual communication between friends and peers normalizes high risk sexual behavior is unrelated to high risk sexual behavior prevents high risk sexual behavior completely decreases high risk sexual behavior

normalizes high risk sexual behavior

Burgess and colleagues were interested in the effects of video game play on college students' GPA. Their results indicated that: playing and watching lowered GPA for males only playing or watching video games had no effect on GPA playing video games increased GPA playing and watching lowered GPA for females only

playing and watching lowered GPA for males only

Mental Health issues would most appropriately be considered part of the __________ domain of development. psychological physical social

psychological

The number 3 appears in cell A1 of an Excel spreadsheet. You write the following equation in cell C1. =3*(A1^2)+ EXP(-0.3*$A1)-10*A$1 What number would appear in cell C1? 51.41 -11.59 -2.59 -25.09 None of the listed answers

-2.59

What is the value of A at the end of this program? int A; int B; A = 8; B = 20; B = A + B - 3 ; A = A + (B/5) ; A = 14 A = 13 A = 8 A = 12 A = 15

A = 13

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

A=12, B=24

The theoretical power generated by a wind turbine depends on what parameters? Select as many as apply. Blade length Wind velocity Blade material Air density Blade weight

Blade length Wind velocity Air density

It doesn't matter which direction you insert the integrated circuits in the socket on the IR Board (See Robot Guidelines, Section 5) True False

False

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

All of the resistors on the circuit board are 10 kilo Ohm (See Robot Guidelines, Section 5) True False

False

A 2" X 8" beam is used to support a load by placing it in two different orientations as shown above. For the applied load shown, what are the relative magnitudes of the moment of inertia (I)? Cannot determine that answer from the given information I for Orientation 1 < I for Orientation 2 I for Orientation 1 = I for Orientation 2 I for Orientation 1 > I for Orientation 2

I for Orientation 1 < I for Orientation 2

What is the purpose of the two icons circled on the "Home" tab menu below? -Change the number to and from percent -Increase and decrease the number of decimals shown -Multiply or divide the number by a factor of 10. -Align the number to the left or to the right

Increase and decrease the number of decimals shown

Of the five professional obligations listed, what was not one of Intel's obligations as a company? Public safety Corporate honesty Sell reliable products Punish the engineers who designed the chip Evaluate problem

Punish the engineers who designed the chip

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

The public welfare.

Two ENGR 10 groups have designed towers for their turbines using small pieces of wood. The overall dimensions of the two towers are the same. Which tower is likely to be stiffer. Tower A Tower B

Tower B

What are the units of voltage, current, and power you will read from the power meter as you take measurements in the solar cell experiment? -V, mA, mW -V, A, W -V, mA, W -mV, A, mW -V, MA, W

V, mA, W

What is the purpose of the POT in the solar lab? -Vary the load on the circuit. -Prevent the circuit from getting overloaded. -Help lift the weight off the ground. -Keep the electric motor from moving to fast.

Vary the load on the circuit.

What technology do solar cells use to turn light into energy? -superconductors -conductors -semiconductors -insulators -electromagnets

semiconductors

Two solar panels are shown below. The one on the left has dimensions L meters by L meters. The one on the right has dimensions of 1.5L meters by 1.5L meters. They are both made by the same manufacturer and have the same efficiency. When subjected to the same sun intensity, what is the ratio of the power output on the right (PR) to the power output on the left (PL)? (PR)/(PL) = 2.3 (PR)/(PL) = 1.5 (PR)/(PL) = 0.44 (PR)/(PL) = 1.0

(PR)/(PL) = 2.3

A reasonable value to assume for the efficiency of a common solar cell that is used in typical PV installations on homes and businesses is? 0.95 to 1.0 0.50 to 0.55 0.15 to 0.25 0.80 to 0.90 0.30 to 0.35

0.15 to 0.25

What is the value of C at the end of this program? int A; int B; int C; A = 4; B = 8; B = A + B - 3 ; C= B+A; A = A + (B/3) ; C= A + C ; 7 13 12 20

20

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

224 W

Given the following piece of C code, how many times does the program go through the while loop int x; int y; x=1 y=0 while (x<5) {y=y+x;x=x*2;} 2 4 3 5 1

3

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? 230W 150W 70W 280W 310W

310W

Power from the sun on earth at noon on a sunny day is about 1040 W/m2. For a 2 m by 2 m solar panel, with an efficiency of 12%, the output power is about 4100 W 500 J 125 W 500 W

500W

Given the following piece of C code, at the end of the program what is the value of A and B? int A; int B; A = 7 ; B = 3 ; if ((A + B) > 8) { A = B ;B = A; } else { B = A;A = B; } A=10, B=10 A=3, B=3 A=7, B=3 A=7, B=7 A=3, B=7

A=3, B=3

Which of the following is not true (review University Policy S07-2)? University policy requires faculty to report all instances of academic misconduct. Expectations of the students with respect to academic integrity must be in the course syllabus. Faculty members have a responsibility to try to minimize opportunities that promote academic dishonesty. Students have a responsibility to encourage their peers to adhere to academic honesty policies and practices. Academic dishonesty does not impact the reputation of the university.

Academic dishonesty does not impact the reputation of the university.

Which of the following factors affect the performance of a solar cell? Choose as many answers as you think are correct. -wavelength of the light -The surface condition of solar cells (cleanness) -The angle of incident light -The intensity of the light

All above

Think of yourself as one of the engineers who was working on the Pentium chip in the 1990s, and you knew about the flaw. Suppose you were asked to comment on the case. Which of the rules of practice and professional obligations listed in the NSPE Code of Ethics would guide your comments? III.1.a Engineers shall acknowledge their errors and shall not distort or alter the facts III.3.a Engineers shall avoid the use of statements containing a material misrepresentation of fact or omitting a material fact II.3.a Engineers shall be objective and truthful in professional reports, statements, or testimony II.3.b Engineers may express publicly technical opinions that are founded upon knowledge of the facts and competence in the subject matter All of the answers given

All of the answers given

____________ refers to a developmental period when something must occur to ensure normal development, whereas ______________ refers to a developmental period when the development of something occurs most easily. Infancy/Childhood Critical Period/Sensitive Period Childhood/Adolescence Sensitive Period/Critical Period

Critical Period/Sensitive Period

The rules of professional conduct (or rules of practice) as specified in the NSPE code of ethics require engineers to conform to all but one of the following rules. Which rule is not required by the code? Do not charge excessive fees. Reveal the interested parties when making statements or arguments. Perform services only in the areas of their competence. Avoid conflicts of interest. Report violations of the code to appropriate professional body.

Do not charge excessive fees.

A code of ethics is a legal document, and therefore a professional can be arrested for violating its provisions. True False

False

According to the solar lab guidelines posted on the ENGR 10 web site, the RED leads in the photo are attached to the negative output of the solar cells. -False -True

False

An even number of blades is more stable than an odd number of blades. False True

False

The emerging adult phase of life is mostly a bad phase. -True -False

False

A team has written a program for their robot and tries to download it to their computer. The program will not download - what should they do. (Hint: read Robot Guidelines - Vex Controller Initiation) -Go to Loader Setup and select a different COM port. -Go get a new controller because this one is broken. -Get a different orange cable. -Check for an error in the programming code.

Go to Loader Setup and select a different COM port.

The set of commands shown is from the move function in the GOTO_BEACON program. What kind of variable is ambient_level? -It is a global variable defined in the main program. -It is a local variable defined in the move function.

It is a global variable defined in the main program.

What is the purpose of the IRB? (Hint: read the robot guidelines - Section 5 is all about the IRB) It is the eyes of the robot. It is the brains of the robot. It steers the robot. It receives signals from the hand controller.

It is the eyes of the robot.

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

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

The psychological (or cognitive domain) of development involves all of the following except: Knowledge Pride Identity Beliefs

Pride

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=5 R=13 R=9 R=8 R=4

R = 9

You are the engineer of record on a building project that is behind schedule and urgently needed by clients. Your boss wants you to certify some roofing construction as properly completed even though you suspect some questionable installation techniques were used. Choose the best course of action from the list below. Certify it, and let your boss know you are taking into account the interests of the company. Tell the clients about the problem, saying that you will certify it if they want you to. Certify it, but keep a close watch on the project in the future, in case any problems develop with it. Refuse to certify it. Talk with the roofer about the installation process to get more information.

Refuse to certify it. Talk with the roofer about the installation process to get more information.

The set of commands shown is from GOTO_BEACON. In this list of commands, what does the following command do? SetDigitalOutput(14,freq); -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 1 KHz signal. -Sets digital port 14 on the controller to 0, which tells the infrared detectors to receive a 10 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 1 KHz signal.

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

This question can be answered by looking at the Wind Turbine Project Guidelines Appenidx A of the Wind Turbine Report should include . . . The drawing of your turbine blade The original copy of your data sheet The list of references Evaluation of teamwork

The original copy of your data sheet

A bumper switch is mounted to a robot with a Cortex controller. The bumper switch is connected to digital input port #2. The robot is direct drive. 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); } } Which one of the following statements most likely describes the behavior of this robot? -The robot will move backward but reverse and go forward when the bumper switch is hit. -The robot will move forward but stop when the bumper switch is hit. -The robot will move backward forever regardless if the bumper hit something or not. -The robot will move forward but reverse when the bumper switch is hit. -The robot will move forward forever regardless if the bumper hit something or not.

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

A robot is using a Cortex controller and is direct drive. The right wheel of a robot 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. void main (void) { SetPWM(3,127); SetPWM(2,-127); wait(2000); SetPWM(2,0); SetPWM(3,0) } Which one of the following statements most likely describes the behavior of this robot? The robot will move forward for 2 seconds and stop. The robot will turn to the right for 2000 seconds and stop. The robot will move forward for 2000 seconds and stop. The robot will turn to the left for 2 seconds and stop. The robot will move backwards for 2 seconds and stop.

The robot will move forward for 2 seconds and stop.

Which of the following statements is false? -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 voltage varies with output current. -The solar cell's output current varies with load -The solar cell's voltage varies with output power.

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

Any human trait or characteristic can be altered or modified at any point in the lifespan, for better or for worse. True False

True

During emerging adulthood many people participate in risky behaviors. -True -False

True

The emerging adulthood phase is less structured that childhood or adulthood. -True -False

True

What conflicting issues were driving Intel's response in dealing with the Pentium case? Obligations to customers versus obligations to stockholders. A product should work as advertised versus most users would be unaffected by the flaw. Highest quality product versus company profit. a and c a, b, and c

a, b, and c

In addition to our personal interests and abilities, as well as the current labor market, our occupational plans are influenced by: the broader social context work values family and peers all of these

all of these

Living in poor neighborhoods makes the transition to adulthood harder because in poor neighborhoods there is more stress less access to important resources all of these less collective efficacy

all of these

The developmental period referred to as emerging adulthood is best characterized as a time in a person's life when that person is: exploring identity changing jobs, romantic relationships, and housing arrangements all of these likely to believe that life holds many possibilities

all of these

Most people who are emerging adults would say that they will be true adults when they: -become parents -have their first real job -are able to take personal responsibility for all of their actions and finances -get married

are able to take personal responsibility for all of their actions and finances

Holman and Sillars' analysis of data on college students' beliefs about hooking-up revealed three dominant themes in students' sexual scripts. Which of the following was not a dominant theme? alcohol consumption personal social network present cheating on partners spontaneous

cheating on partners

In Zawadzki and colleagues' study of college students' experience of loneliness, they discovered that loneliness predicted later depression through what mechanism? seeking social support emotion dysregulation decreasing anxiety and rumination increasing anxiety and rumination

increasing anxiety and rumination

On a polarized capacitor, which is the positive lead and where should it be placed on the circuit board?(See Robot Guidelines) -positive is the longer lead placed on board by a hole with a round symbol -positive is the shorter lead placed on board by a hole with a '+' sign and/or by a square solder pad -positive is the shorter lead placed on board by a hole with a round symbol -positive is the longer lead placed on board by a hole with a '+' sign and/or by a square solder pad

positive is the longer lead placed on board by a hole with a '+' sign and/or by a square solder pad

The study of loneliness, anxiety, rumination, and depression is an example of the ways that developmental domains interact with and influence each other. In this study, loneliness and rumination are part of the cognitive domain, whereas anxiety and depression are part of the emotional domain. The cognitive and emotional domains are combined in the ____________ domain. social psychological physical

psychological

According to Conley and Lehman, test anxiety related worry has a negative impact on physical health. The evidence for this comes from the finding that when test anxiety related worry was high. rates of migraine headaches increased systolic blood pressure decreased systolic blood pressure increased rates of minor colds and illnesses increased

systolic blood pressure increased

The code shown is from the main Go To Beacon program. In this program, what does "While (1 = = 1) mean? -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) is an error. It should be while (1=1)

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

This question can be answered by looking at the Wind Turbine Project Guidelines The turbine tower is specified to be 17 inches tall. What is the tolerance of this specified height? ± 1 inch ± 1/8 inch ± 1/2 inch ± 1/16 inch ± 1/4 inch

± 1/16 inch