CEP Dynamics 2018-22

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

Complex Engineering problem Tot otal al Mar Marks ks:: -25 -25 (Det (Detai aill rubr rubric icss shee sheett give given n sepa separa rate tely ly)) Course Name: - Engineering Mechanics-II

Code: BME-124

Section B (Group I)

The connecting rod AB of a certain internal-combustion engine weighs 1.2 lb with mass center at G and has a radius of gyration about G of 1.12 in. The piston and piston pin A together weigh 1.80 lb. The engine is running at a constant speed of 3000 rev/min, so that angular velocity of the crank is 3000(2π) / 60 = 100π rad/sec. Neglect the weights of  components and calculate the magnitude of the force on the piston pin A for the crank angle ɵ = 900 

Fig. 1

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

Tot otal al Mar Marks ks:: -25 -25 (Det (Detai aill rubr rubric icss shee sheett give given n sepa separa rate tely ly)) Course Name: - Engineering Mechanics-II

Code: BME-124

Section B (Group II)

The valve, which is screwed into fixed pipe at section A-A, is designed to discharge fresh water at the rate of 340 gal/min into atmosphere in the x-y plane as shown. Water pressure at A-A is 150 lb/in2 gage. The flow area at AA-A A has a diameter of 2 in. and diameter of the discharge area at B is 1 in. Neglect weight of the valve and water within it and compute the shear V, tension F, torsion T, and bending moment M at section A-A (1 gallon contains 231 in3.)

Fig. 2

Tot otal al Mar Marks ks:: -25 -25 (Det (Detai aill rubr rubric icss shee sheett give given n sepa separa rate tely ly)) Course Name: - Engineering Mechanics-II

Code: BME-124

Page 2 of 11

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

Section B (Group III) The preliminary design of a   unit for automatically reducing the speed of a freely rotating assembly is shown. Initially the unit is rotating freely about a vertical axis through O at a speed of 600 rev/min with the arms secured in the positions shown by AB. When the arms are released, they swing out- wards and  become latched in the dashed positions shown. The disk has has a mass of 30 kg with a radius of gyration of 90 mm about O. Each arm has a length of 160 mm and a mass of 0.84 kg. and may be treated as a uniform slender rod. Determine the new speed N of rotation and calculate the loss /∆E/ of energy of the system. Would the results re sults be affected a ffected by either the direction of rotation or the sequence of release of the rods?

Fig. 3  

Groups detail of section B MUST/FA18 MUST/F A18-B -BMEME-056 056/AJ /AJK K MUST/F MUS T/FA18 A18-B -BMEME-057 057/AJ /AJK K MUST/F MUS T/FA18 A18-B -BMEME-058 058/AJ /AJK K

MUST/F MUST/FA18 A18-B -BMEME-06 069/ 9/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-07 070/ 0/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-07 071/ 1/AJK  AJK 

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MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

Group I

MUST/FA18 MUST/F A18-B -BMEME-059 059/AJ /AJK K MUST/F MUS T/FA18 A18-B -BMEME-060 060/AJ /AJK K MUST/F MUS T/FA18 A18-B -BMEME-063 063/AJ /AJK K MUST/F MUS T/FA18 A18-B -BMEME-065 065/AJ /AJK K

MUST/F MUST/FA18 A18-B -BMEME-07 072/ 2/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-07 073/ 3/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-07 074/ 4/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-07 075/ 5/AJK  AJK 

MUST/FA18-BME-066/AJK  MUST/FA18-BME-067/AJK 

Group II

MUST/F MUST /FA1 A188-BM BMEE-07 076/ 6/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-07 077/ 7/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-07 078/ 8/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-07 079/ 9/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-08 080/ 0/AJ AJK K

MUST MUST/F /FA1 A188-BM BMEE-08 083/ 3/AJ AJK  K  MUST MUST/F /FA1 A188-BM BMEE-08 084/ 4/AJ AJK  K  MUST MUST/F /FA1 A188-BM BMEE-08 085/ 5/AJ AJK  K  MUST MUST/F /FA1 A188-BM BMEE-08 086/ 6/AJ AJK  K  MUST MUST/F /FA1 A188-BM BMEE-08 087/ 7/AJ AJK  K 

MUST/FA18-BME-081/AJK  MUST/FA18-BME-082/AJK 

Group III

MUST/F MUS T/FA18 A18-B -BMEME-088 088/AJ /AJK K

MUST/F MUST/FA18 A18-B -BMEME-09 094/ 4/AJK  AJK 

MUST/F MUS T/FA18 A18-B -BMEME-089 089/AJ /AJK K MUST/FA18 MUST/F A18-B -BMEME-090 090/AJ /AJK K MUST/F MUS T/FA18 A18-B -BMEME-091 091/AJ /AJK K MUST/F MUS T/FA18 A18-B -BMEME-092 092/AJ /AJK K MUST/F MUS T/FA18 A18-B -BMEME-093 093/AJ /AJK K

MUST/F MUST/FA18 A18-B -BMEME-09 095/ 5/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-09 096/ 6/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-09 097/ 7/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-09 098/ 8/AJK  AJK  MUST/F MUST/FA18 A18-B -BMEME-09 099/ 9/AJK  AJK 

Complex Engineering problem T otal M arks -2-5Engin (Det (D ru s nshee sh given n sepa separa rate tely ly)) Cot oualrsMar eN aks: m:e:-25 eeetai rail inlgrubr Mbric ecics ha iceet s-tIIgive

Code: BME-124

Page 4 of 11

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

Section A (Group I)

The connecting rod AB of a certain internal-combustion engine weighs 2.2 lb with mass center at G and has a radius of gyration about G of 2.12 in. The piston and piston pin A together weigh 2.80 lb. The engine is running at a constant speed of 3000 rev/min, so that angular velocity of the crank is 3000(2π) / 60 = 100π rad/sec. Neglect the weights of  components and calculate the magnitude of the force on the piston pin A for the crank angle ɵ = 600 

Fig 1

Tot otal al Mar Marks ks:: -25 -25 (Det (Detai aill rubr rubric icss shee sheett give given n sepa separa rate tely ly)) Course Name: - Engineering Mechanics-II

Code: BME-124

Section A (Group II)

Page 5 of 11

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

The valve, which is screwed into fixed pipe at section A-A, is designed to discharge fresh water at the rate of 240 gal/min into atmosphere in the x-y plane as shown. Water pressure at A-A is 100 lb/in2 gage. The flow area at AA-A A has a diameter of 2 in. and diameter of the discharge area at B is 1.5 in. Neglect weight of the valve and water within it and compute the shear V, tension F, torsion T, and bending moment M at section A-A ( 1 gallon contains 231 in3.)

Fig. 2

Tot otal al Mar Marks ks:: -25 -25 (Det (Detai aill rubr rubric icss shee sheett give given n sepa separa rate tely ly)) Course Name: - Engineering Mechanics-II

Code: BME-124

Section A (Group III) The preliminary design of a   unit for automatically reducing the speed of a freely rotating assembly is shown. Initially the unit is rotating freely about a vertical axis through O at a speed of 600 rev/min with the arms secured in the positions shown by AB. When the arms are released, they swing out- wards and Page 6 of 11

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

 become latched in the dashed positions shown. The disk has has a mass of 40 kg with a radius of gyration of 70 mm about O. Each arm has a length of 180 mm and a mass of 0.58 kg. and may be treated as a uniform slender rod. Determine the new speed N of rotation and calculate the loss /∆E/ of energy of the system. Would the results be affected by either the direction of rotation or the sequence of release of the rods?

Fig. 3

Groups detail of section A

 

Group I

 

MUST/F MUST /FA1 A188-BM BMEE-00 002/ 2/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-00 003/ 3/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-00 004/ 4/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-00 005/ 5/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-00 006/ 6/AJ AJK K

MUST/F MUST /FA1 A188-BM BMEE-00 009/ 9/AJ AJK  K  MUST MU ST/F /FA1 A188-BM BMEE-01 010/ 0/AJ AJK  K  MUST MU ST/F /FA1 A188-BM BMEE-01 011/ 1/AJ AJK  K  MUST MU ST/F /FA1 A188-BM BMEE-01 012/ 2/AJ AJK  K  MUST MU ST/F /FA1 A188-BM BMEE-01 013/ 3/AJ AJK  K 

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MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

Group II

MUST ST/F /FA1 A188-BM BMEE-00 007/ 7/AJ AJK K MU MUST/FA18-BME-008/AJK 

MUST MU ST/F /FA1 A188-BM BMEE-01 015/ 5/AJ AJK  K 

MUST ST/F /FA1 A188-BM BMEE-01 019/ 9/AJ AJK K MU MUST MU ST/F /FA1 A188-BM BMEE-02 021/ 1/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-02 022/ 2/AJ AJK K MUST MU ST/F /FA1 A188-BM BMEE-02 023/ 3/AJ AJK K

MUST/F MUST /FA1 A188-BM BMEE-02 029/ 9/AJ AJK  K  MUST MU ST/F /FA1 A188-BM BMEE-03 032/ 2/AJ AJK  K  MUST MU ST/F /FA1 A188-BM BMEE-03 033/ 3/AJ AJK  K  MUST MU ST/F /FA1 A188-BM BMEE-03 039/ 9/AJ AJK  K 

MUST/FA18-BME-016/AJK 

MUST/FA18-BME-024/AJK  MUST/FA18-BME-026/AJK  MUST/FA18-BME-027/AJK 

MUST/FA18-BME-040/AJK  MUST MU ST/F /FA1 A188-BM BMEE-04 043/ 3/AJ AJK K MUST/FA18-BME-044/AJK 

Group III

MUST/FA18-BME-045/AJK  MUST/FA18-BME-046/AJK 

MUST MU ST/F /FA1 A188-BM BMEE-04 049/ 9/AJ AJK  K  MUST/FA18-BME-050/AJK   

MUST/FA18-BME-053/AJK 

 

MUST/FA18-BME-054/AJK 

MUST/FA18-BME-047/AJK  MUST/FA18-BME-048/AJK 

 

Tot otal al Mar Marks ks:: -25 -25 (Det (Detai aill rubr rubric icss shee sheett give given n sepa separa rate tely ly)) Course Name: - Engineering Mechanics-II

Code: BME-124

  Section C (Group IV) The loaded pickup truck, which weighs 3600 lb with mass center at G 1, is hauling the 1800lb trailer with mass center at G 2. While going down a 10-percent grade, the driver applies his brakes and slows down from 60 mi / hr to 30 mi / hr in a distance of 360 ft. For this interval compute the x and y components of the force exerted on the trailer hitch at D by the truck. Also find the corresponding normal force under each pair of wheels at B and C.  Neglect the rotational effect effect of the wheels.

Page 8 of 11

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

Fig. 4

Groups detail of section C MUST/FA16-BME-003/AJK 

Group IV  

 

MUST/FA15 MUST/F A15-B -BMEME-006 006/AJ /AJK K MUST/F MUS T/FA15 A15-B -BMEME-033 033/AJ /AJK K MUST/F MUS T/FA15 A15-B -BMEME-034 034/AJ /AJK K MUST/F MUS T/FA15 A15-B -BMEME-037 037/AJ /AJK K MUST/F MUS T/FA15 A15-B -BMEME-059 059/AJ /AJK K MUST/FA15-BMEMUST/FA15-BME-081/AJK 081/AJK MUST/F MUS T/FA15 A15-B -BMEME-086 086/AJ /AJK K MUST/F MUS T/FA16 A16-B -BMEME-001 001/AJ /AJK K

Re-Enrolled

MUST/FA16-BME-024/AJK  MUST/F MUST/FA16 A16-B -BMEME-05 053/ 3/AJK  AJK  MUST/F MUST/FA16 A16-B -BMEME-06 060/ 0/AJK  AJK  MUST/F MUST/FA16 A16-B -BMEME-06 062/ 2/AJK  AJK  MUST/F MUST/FA17 A17-B -BMEME-03 035/ 5/AJK  AJK  MUST/F MUST/FA17 A17-B -BMEME-03 038/ 8/AJK  AJK  MUST/FA17-BMEMUST/FA17-BME-039/AJK  039/AJK  MUST/F MUST/FA17 A17-B -BMEME-04 043/ 3/AJK  AJK  MUST/F MUST/FA17 A17-B -BMEME-06 069/ 9/AJK  AJK  MUST/FA15-BME-054/AJK  MUST/FA16-BME-028/AJK  MUST/FA17-BME-083/AJK 

 

Complex Engineering Problem

Course

Knowledge Profile (WK)

PEO

PLO

Engineering Mechanics-II (BME-124)

WK3: Theory based engineering fundamentals WK4:: Engineeri WK4 Engineering ng specialist knowledge that

PEO 1: The graduate exhibiting engineerin g skills

PLO 2

towar ards ds a  provides theoretical successful fram framew ewor orks ks an and d tow  bodies of  career 

Definition of CEP

1)

Analyze the an angu gula larr velo veloci city ty of Crank at certain angle precisely to calculate the magnitude of   forc fo ap appl plie din on thercee pis isto ton nied a ce cert rtai ain n Inte Intern rnal al

Complex Activities

1)

In IC Engine, analysis of   constant const ant angul angular  ar  speed of crank is dif diffi ficu cult lt in the the  presence of gas

Assign ment / Taxono my level A2/ C3, C4

 present in the cylinder cylin der and the invo involv lvem emen entt of 

Page 9 of 11

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

knowledge knowle dge fo forr the  practice areas areas WK5: WK 5: Knowl Knowledg edgee that supports Engineering design des ign/an /analy alysis sis in  practice areas areas

2)

combustion Engine Analyze the discha discharg rgee rat ratee of  fres fresh h wate waterr into into atmosphere

 precisely compute thtoe sh shea earr, ten tensi sion on,, torsion and  bending moment at cer certai tain n sec sectio tion n of pipe 3) Analyze the free rotating rotat ing asse assembly mbly of a unit with  precise positions of its arms to calculate the new speed N and loss of energy of   system 4) Analyze the  proper hitching of  a pickup truck  with a bulky mass at a certain point to calc calcul ulat atee the the force force exe exerte rted d on hitching point and on wheels.

2)

radius of   gyra gyrati tion on abou aboutt the center. Analysis of   sh shea earr, tens tensio ion, n, torsion and

 bending at certainmoment section of pipe is a major  conc concer ern n while hile water discharge dischargess through valve 3) Analysis of   speed of rotation and Loss of   energy ener gy provi provides des comple com plexit xity y due to different  positions of arms of a freely rotating unit 4) Calculation of   forces forces ind induci ucing ng on tyres of    pickup truck and linked linked mas masss and forces on hitching point of   pickup truck and  bulky mass  provides comp comple lexi xity ty on considering mass center G.

Detailed rubrics for Complex Engineering Problem (Assigned in the subject of Engineering Mechanics-II) Evaluation Criteria

Criteria Understanding of the problem Background Knowledge to obtain solution and Write up Awareness about the changes in problem model Accuracy in Calculations Result and discussion Total marks

Marks 5 5 5 5 5 25

Page 10 of 11

 

MIRPUR UNIVERSITY OF SCIENCE & TECHNOLOGY (MUST), MIRPUR  (AZAD JAMMU & KASHMIR) Faculty of Engineering

Sr PLO #

Criteria to  Very weak be checked (0)

Weak (1-2)

Acceptable (3-4)

1

PLO-01

Understanding of the problem

Able to unders und erstan tand d bas basic ic concept but unable to identify

Able ble to iden identi tify fy Stu Studen dents ts has in-dep in-depth th few parameters and knowledge of the Limited knowledge  parameter and can about the concepts defend them logically.

2

PLO-01

 parameters Use of  background knowledge is linked to the  problem to some extent.

Background knowledge is used and organized  properly but write write up is not sufficient

Background knowledge and write up is up to the mark for related  problem.

3

PLO-02

Having no knowledge of  background of the Background  problem and its Knowledge and Write up link to the required  problem /No write write up  No techniques of  Awareness when about the solution changes in model

Having know Having knowledge ledge to some some ex exte tent nt to techniques of   solution when changes in model

Having in depth knowledge of   techni technique quess of so solut lution ion when changes in model

Variables ariables used are  properly linked to

Calculations are accur accurate ate and var variab iables les

the required  problem and proper  usagee of form usag formulae ulae related rela ted to probl problem em thus thus calc calcul ulat atio ions ns are accurate to some extent Calculation methods are used  properly to obtain results and some discussion on these Results.

are are pro proper perly ly linked linked to  problem.

chan chang ges  problem model 4

PLO-02

Unable to understand and identify problem

in

Calculations

Not having scientific

the

know knowle ledg dgee th thaat how steps are taken for proper   calcula lattions to achieve output / No calculations. 5

PLO-02

Result and discussion

Calculations does not provide the output. /No Results

Having insufficient knowledge of   techniques of   solution when changes in model Irrelevant formulae are applied for   calc calcul ulaati tion onss of  required problem / Wrong calculations where variab var iables les are not  properly defined. Results are not close to accuracy

Good. (5)

Results are obtained through proper use of scientific methods and have knowledge of discussion on results.

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