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ENGE 1024 Engineering Exploration - Fall 2007 Test 2 - Prof. Donatus C. Ohanehi, Exams of Engineering

Virginia Polytechnic Institute and State University (Virginia Tech)Engineering
Prof. Donatus C. Ohanehi

A test form for enge 1024 engineering exploration at virginia tech. The test covers various topics including ethics, physics, and labview. It includes multiple choice questions and problems that require the use of formulas and graphs.

Typology: Exams

Pre 2010

Uploaded on 10/28/2008

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Form A, Page 1 of 9
Department of Engineering Education
Virginia Tech
ENGE 1024 – Engineering Exploration - Fall 2007
TEST 2 FORM A
NAME _________________________________ ID NUMBER __________________
SECTION CRN _________________________ INSTRUCTOR ________________
WORKSHOP GTA _______________________
With my signature, I verify that I have neither given nor received unauthorized assistance on
this test. ________________________________________________
DO NOT OPEN THIS TEST UNTIL INSTRUCTED TO DO SO.
1. This test is closed book and closed notes.
2. All cell phones and PDAs must be turned off and put away.
3. You may use a calculator.
4. Fill in identifying information on the opscan. Submitting incomplete or inaccurate
opscan forms will be subject to a 5 point test grade penalty. Be sure you have entered the
following and darkened the appropriate circles:
• NAME
• COURSE (ENGE1024)
• COURSE REF. (TEST 2)
• ID NUMBER=student ID number
• FORM= test form A in this case
• SEAT NO=last 3 digits of your CRN
5. Fill in the opscan answers as you work through the test, do not wait until the proctor calls
time/pencils down. Students will be required to stop working immediately, including
opscan marking, when time/pencils down is called.
6. You have 60 minutes to complete the test.
pf3
pf4
pf5
pf8
pf9

Partial preview of the text

Download ENGE 1024 Engineering Exploration - Fall 2007 Test 2 - Prof. Donatus C. Ohanehi and more Exams Engineering in PDF only on Docsity!

Department of Engineering Education

Virginia Tech

ENGE 1024 – Engineering Exploration - Fall 2007

TEST 2 FORM A

NAME _________________________________ ID NUMBER __________________

SECTION CRN _________________________ INSTRUCTOR ________________

WORKSHOP GTA _______________________

With my signature, I verify that I have neither given nor received unauthorized assistance on

this test. ________________________________________________

DO NOT OPEN THIS TEST UNTIL INSTRUCTED TO DO SO.

  1. This test is closed book and closed notes.
  2. All cell phones and PDAs must be turned off and put away.
  3. You may use a calculator.
  4. Fill in identifying information on the opscan. Submitting incomplete or inaccurate opscan forms will be subject to a 5 point test grade penalty. Be sure you have entered the following and darkened the appropriate circles: - NAME - COURSE (ENGE1024) - COURSE REF. (TEST 2) - ID NUMBER=student ID number - FORM= test form A in this case - SEAT NO=last 3 digits of your CRN
  5. Fill in the opscan answers as you work through the test, do not wait until the proctor calls time/pencils down. Students will be required to stop working immediately, including opscan marking, when time/pencils down is called.
  6. You have 60 minutes to complete the test.

FORMULAS and DEFINED CONVERSION FACTORS

1 in = 2. 54 cm

1 ft = 12 in

1 ft = 0. 304800 m

1 yard = 3 ft

1 mi = 5280 ft

1 ft^3 = 7. 48 gal

1 gal = 3. 78 L

1 lbmol = 453. 6 mol

1 psi = 6895 Pa

1 atm = 14. 7 psi

1 atm = 760 mm Hg

m =

∑ (^ ∑ )

2 i

2 i

i i i i n x x

n xy x y

b =

∑ (∑^ )

2 i

2 i

i i i

2 i i n x x

y x xy x

m =

∑ (∑^ )

2 i

2 i

i i i i n x x

n x lny x lny

ln b =

∑ (∑^ )

2 i

2 i

i i i

2 i i n x x

lny x x lny x

m =

∑ (^ )^ (^ ∑ )

2 i

2 i

i i i i n logx logx

n logx logy logx logy

log b =

∑ (^ )^ (∑^ )

2 i

2 i

i i i

2 i i n logx logx

logy logx logx logy logx

Use Figure 2 to answer questions 4-5.

FIGURE 2: LabVIEW BLOCK DIAGRAM

  1. The block diagram shown in Figure 2 has
  1. Two controls and two indicators
  2. One control and two indicators
  3. Two functions and three controls
  4. Two controls and one indicator
  5. None of the above
  1. If a user assigns Y = 7 and would like to get R = 9 after running this VI, choose the value he/she should assign to K (see Figure 2):
  1. 7
  2. 12
  3. 9
  4. 81
  5. None of the above
  1. Table 1 shows data that fits a power function. Power was measured as a function of current. Given the data in Table 1, what is the value of the denominator for the formula to determine m using least squares linear regression?

Table 1. Current and power data. Current, I (A) 1. 0 3. 0 5. 0 8. 0 10. Power, P (W) 5. 5 45 120 310 510

  1. -6. 9
  2. 3. 2
  3. 9. 0
  4. 96
  5. 2. 7 x 10^2
  6. None of the above
  1. Which of the NSPE Fundamental Canons of Ethics is the most important out of the six fundamental canons?
  1. Engineers shall act for each employer or clients as faithful agents or trustees.
  2. Engineers shall perform services only in the areas of their competence.
  3. Engineers shall hold paramount the safety, health, and welfare of the public.
  4. Engineers shall issues public statements only in an objective and truthful manner.
  5. Engineers shall avoid deceptive acts.
  6. Engineers shall conduct themselves honorably, responsibly, ethically, and lawfully so as to enhance the honor, reputation, and usefulness of the profession.
  1. The temperature (T, in °C) of a piece of metal is measured as a function of time (t, in s) after it is removed from an oven. The data falls along a straight line on semi-log-y paper. If one of the points on the best-fit line is (2. 0, 1. 7×10^2 ) and m equals -0. 12, what is the value of the other equation constant of the best-fit line?
  1. 1. 3 × 10^2
  2. 1. 7 × 10^2
  3. 1. 8 × 10^2
  4. 2. 2 × 10^2
  5. None of the above

FIGURE 3. LOGIC CIRCUIT

  1. For the logic circuit in Figure 3 (above) with three switches (i.e., A, B, and C) and one motor (i.e., M), what can the value of B be for the truth table below? ON=logic 1 and OFF=logic 0.

A B C M 1? 1 1

  1. 0 only
  2. 1 only
  3. 2 only
  4. 0 or 1
  5. 0 or 2
  6. 1 or 2

OR AND

A

B

M C

  1. You are given a two-wheeled robot in which each wheel is attached to a separate motor. Which combination of wheel movements will make the robot turn forward left?
  1. The right wheel spins forward quickly, and the left wheel does not move.
  2. The left wheel spins forward quickly, and the right wheel does not move.
  3. The right wheel spins forward quickly, and the left wheel spins forward slowly.
  4. The left wheel spins forward quickly, and the right wheel spins forward slowly
  5. The left wheel spins backward quickly, and the right wheel spins forward quickly.
  1. The human digestive system is
  1. a closed constructed system
  2. an open constructed system
  3. a closed natural system
  4. an open natural system
  5. none
  1. The lab technician incorrectly calibrated a lab scale. Due to the incorrect calibration, the readings from the scale are consistently two grams too high. This example is best described as:
  1. a gross error
  2. a systematic error
  3. a random error
  4. a factual error
  5. a recording error
  1. Which of the following is a cost-saving engineering decision that Fred (the main character) makes in the video Incident at Morales?
  1. He decides not to line the evaporation ponds despite possible seepage of hazardous substances.
  2. He decides not to purchase the more expensive Swiss control modules.
  3. He decides to replace the Morales plant manager with a less experienced employee at a lower annual salary.
  4. He decides to make significant changes to the consumer packaging of the paint remover being manufactured in Morales.
  1. For a data set: if there is no correlation between x and y, what is the value of the coefficient of determination (r^2 )?
  2. -0. 5
  3. 0
  4. 0. 5
  5. 1

Part II. Workout problems (24 points)

Workout Problem 1 of 2 (20 pts)

GIVEN: The current across a variable resistor is recorded while the resistance is changed.

Table 2. Resistance and current for an experiment using a variable resistor

FIND: P rovide a complete graphical representation of the data in Table 2. DO NOT determine the empirical function.

2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9

2

3

4

5

6

7 8 9

2

3

4

5

6

7

89

2

3

4

5

6

7 89

(^11 1 1 )

1

1

1

(see next page for 2nd^ workout problem)

Resistance, R (kΩ) 1. 3 4. 0 5. 9 8. 2 11 14 Current, I (mA) 8. 2 2. 4 1. 6 1. 1 0. 85 0. 64