Exam 1 Fall 2011

Exam 1 Fall 2011 - Engineering Design - ENGR 13x 76 o 3...

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Unformatted text preview: Engineering Design - ENGR 13x 76 o 3 Name _—_‘ Exam 1 — Fall 2011 Course and Section # 133 z - 00 Z Please write your name, course number, and section number (i.e. ENGR 1332—002) at the top of every page. For multiple choice questions, circle the best answer to the question. Show your work where appropriate. Be sure to write legibly — if I cannot read your writing then you will receive zero credit for the problem. Point values are indicated at the beginning of each problem. lfywou read all of this, go to the bottom of pa e three and draw a star in the lower right hand corner. Goodaluckl 1) (2pts) If you hear an engineer using phrases such as "that seems reasonable” or "that answer is plausible” then he is using: a) Experience b) The Force @ Intuition / cl) Knowledge 2) (2pts) "Rules of thumb" and remembering past failures are important when utilizing: Experience b) Knowledge / c) Intuition d) A hammer 3) (3pts) ABET ist e“ rga ' stand for? ation th t reviews engineering curriculum. What do the letters in ABET 1 . s . acor- Engineering; [Pam/n. 4) (3pts) Engineering, law, medicine and accounting are all examples of Pgofi‘fiisiaag S) (3pts) What is one of the differences between a scientist and an engineer that we discussed in class? 9 sci‘en‘t ists proves minqg cmol aux qumeex‘ deaxo‘v‘g ‘c‘ué 6) (Spts) List five of the top 20 engineering accomplishments of the 20th century according to the National Academy of Engineering. a) Radio a <" 1 b) Intfignci Name ; Course and Section # BBZ "002 Engineering Design — ENGR 13x2 Exam 1 — Fall 2011 7) (2pts) You just completed a process simulation of a chemical plant. According to your simulation, the reactor vessel needs to be 100m in diameter. You reject this design because . . . a) It will cost too much b Your boss doesn’t like metric units 1 It is an order of magnitude bigger than expected by your "back of the envelope” calculations ' Your corporate rules of thumb predict it should be 95m in diameter 8) (3pts) Give one of the definitions of design that we discussed in class. ) Design is ‘me Now-39 oi.— amok/elm?> and developing Something. +0 solve a. Problem 9) (4pts) Classify the following as design, analysis, or replication: a) Find a way to automate the process of shelving books in the library. dasign b) Find the trajectory of a bullet fired from a prototype machine gun. analysis c) Manufacture a laptop that utilizes a 500 GB hard drive instead of a 250 GB hard drive. [agitation r’dr)/|mprove the efficiency of an emergency room at the hospital. i mm; Ksig 10) (2pts) uses math to predict or confirm the outcomes of an experiment. Analysis b) Design c) Knowledge d) Replication 11) (3pts) What are two of the elements of good design that we discussed in class? w“ a) (BOQC b) Meets flog? Kequifmmemfg v3. ,, 12) (2pts) From the list below, what is the first thing you would want to do as part of the design cycle? Determine ifthe problem has already been solved by someone else b) Develop a list of possible solutions for further consideration c Make some rough calculations Identify the design constraints for the problem 1 1 x r ‘y Engineering Design — ENGR 13x2 Exam 1 ~ Fall 2011 13) (__2pts) This element of the design cycle distinguishes design from replication. Sag“) Revision ,1 ) Testing c Define overall objectives Gather information 14) (2pts) When is the most expensive time to discover a problem in the design cycle? a) Choose/change the design approach Testing c) Identify and identify possible design strategies d) Model, analyze 15) (3pts) List two barriers to creativity that we discussed in class. a) immsibic Ideas 3 ’7 / J b) :nsQiro‘fior‘i 16) (2pts) Formal brainstorming a Requires a suit and tie @ Draws in all group members c) Limits the number of unfeasible ideas generated d) Is good because it does not require a facilitator 17) (3pts) Two methods of formal brainstorming that we discussed in class are: \ a) Idea Cameroer /\ f7» b) Idea “Trigfier Name —__ Course and Section # i3: 2. -OOZ 18) (10pts) Estimate the volume of asphalt needed to cover one mile of two-lane highway. State your assumptions and show your work. (You can use the back of this page if needed.) Highan 3&1“ A , A, , ,7 4 I» ’ ~ ,Iiw PW “my, = 57.80%» ’95P.er 6)“):5/3‘261 V: flxwxh fl *— 528091: k) = W4? h = slrzf't. / C a r or??? LE 1,} i—-—-——l 54%— (09' \f 1/ 5280+:- 7.112% Wag“) 3 .V: 35200-9: ,WW Name !__ Course and Section # BéZ'OOZ. Engineering Design - ENGR 13x2 Exam 1 — Fall 2011 19) (4pts) How many significant figures are in each ofthe following? a) 1.734 4 - b) 1.53 x 105 3 ~ C) 126,273.0 '7 a d) The product of 123.2 x 0.0052 Z - 20) (4pts) Refer to the attached drawing and tolerance table from Horenstein. Problem 4.25 Tolerance Table x.xx :L- 0.01 xx :: 0.1 x.xxx i 0.001 a) What is the most critical dimension for the manufacture of this button? £5 E r1)“ ' b) What is the range of acceptable values for the diameter of the 0.02” holes? \\ \ 0.01— oroa.‘ - 21) (2pts) If you need to convey data in which both variables extend over many orders of magnitude, the best type of graph would be a) X—Y plot bl Semi-log plot (CDLog—log plot . d) Polar plot @ Naml Course and Section # i332 -OC:Z Engineering Design — ENGR 13x2 Exam 1 — Fall 2011 22) (3pts) List three advantages of prototyping. min a i r' 23) (2pts) An electrical engineer might use this device that we discussed in class for developing a prototype. a) bread board 24) (2pts) if a full size prototype is not feasible then you might use a a) Smdfier scoot 25) (2pts) This type of drawing shows front, side, and end views. a) isometric @Orthographic c) Assembly d) Solid model 26) (2pts) This type of drawing can be used for modeling the behavior of a part. a) Isometric /V b) Orthographic _ Assembly Solid model 27) (2pts) This type of drawing conveys many features at a glance. @ isometric b) Orthographic c) Assembly d) Solid model 28) (3pts) How can you determine that ear protection is required if you do not have access to a sound a . leve' meter' I—i— you Cam not hear Q pe mom who x: “ram-t} «3 to you at normal Cm ~. first-:3 use. 29) (3pts) There is a fire in the corner of the lab. What is the first thing you should do? 75/! ‘l'm COOFdhxcttar Cali 1 ii 3 a 5:21;: i} \\ WE) Engineering Design - ENGR 13x2 Name Exam 1 — Fall 2011 Course and Section # ISSZ ~OOZ 30) (15 pts) Most of the buildings on campus are designed to have a very long life. By utilizing building materials such as concrete and brick instead of wood frame construction, we have numerous building on campus that are well over 50 years old. Many of these buildings have recently undergone renovation, such as South Murray (which was originally a residence hall) and the Student Union. Concrete is a very important building material which has changed the face of construction projects around the world. A normal weight concrete weighs approximately 2300 kg/m3. The unit weight (density) of concrete varies, depending on the amount and density of the aggregate, the amount of air that is entrapped or purposely entrained, and the water and cement contents, which in turn are influenced by the maximum size of the aggregate. (www.concrete.org) Engineering North was constructed in the 1970’s and it is made primarily of reinforced concrete. If you examine the building closely, you will find that the majority of interior walls are also made of concrete. (This makes it very difficult to hang pictures in my office!) This made me wonder, if I were to ignore everything in Engineering North except the concrete, how much would the building weigh? For the purpose of this problem, assume that Engineering North is 150 feet long and 50 feet wide. The height of each floor in the building is approximately 10 feet. There are 2.2Ibs in 1kg and 0.028m3 in 1ft3. Clearly show your work and state all assumptions. Use appropriate significant figures when stating your answer. (You can use the back of this page if needed.) F con-1’ - bfloors— including baseMeW" V ‘ Walls are aboo-‘l- 39— Hm'ck « Negledr ctotss room m\\S / an flifl‘i’CdOC Volume, 0:;- Cat/(cm on \‘Aecr 448m3 2300 kg 442% “fig x = #030000 [<3 /4 IOSUOOOKQ‘) X 221135 I : I30 oolbs ...
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This note was uploaded on 01/10/2012 for the course ENGR 1332 taught by Professor Nazemetz during the Fall '08 term at Oklahoma State.

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Exam 1 Fall 2011 - Engineering Design - ENGR 13x 76 o 3...

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