f
R-694
Scat
No.
i^a4;if^^>^:
Total No. of Pa.cs : 2
B . E . (Mechanical) (Semester
VIIII)) Exa'ffiiffl'^ti.
ExatWffl'^tion, December - 2014
: e r- V
A U T O M O B I L E E N G I N E E R I N G (Elective - I)
Sub. Code : 47984
Day and Date : Wednesday, 10 - 12 - 2014
xo i u
i , - . . Xotal Marks : 100
Time : 2.30 p.m. to 5.30 p.m.
Instructions : 1)
2)
3)
4)
5)
,.>vo
Attempt any three questions from each section.
Draw neat sketches wherever necessary.
Figures to (he right indicate full marks.
Make suitable assumptions if neccssar>' and slate it clearly.
Use of non-programmable calculator is allowed.
SECTION - I
Ql) a)
b)
Q2) a)
b)
i"h
Explain with neat diagram, front engine rear wheel drive and write its
advantages and disadvantages.
|8|
Draw the layout of the automobile vehicle in general showing important
components. Explain any two of them.
[8]
Draw layout and explain in detail principle, construction, working,
advantages, limitations and applications of electric vehicles.
|8|
A motor vehicle weighs 7900N and its engine develops 14.5kW at
2500rpm. At this engine speed the road speed of the car on the top gear
is 63km/hr. Bottom gear reduction is 3.5:1 and the efficiency of
transmission is 87% on top and 80% on bottom gear. The diameter of
tyres is 0.762m and the projected front area of the vehicle is 1.105m\
The coefficient of air resistance is 0.0314. Where R=KAV-, where R is
resistance in N, K is coefficientof resistance, A is frontal area in m^ V is
speed in km/hr. Road resistance is 0.023W, N. calculate:
[8|
i)
Speed of the car on bottom gear
ii) The tractive force available at the wheels on top and bottom gear.
iii) The tractive force at the wheels required to start up the car on the
level and attain a speed of 49km/hr, in 10 sec.
(Average air resistance may be taken as half, the maximum and accelerating
force to vanish at 49km/hr speed.)
RT,0
R-694
Q3) a)
b)
Write classification of clutches. Explain single plate automobfle
clutch.
[8]
Draw a neat diagram of differential and explain its constmction, principle
and working.
[8]
Q4) Write short notes on a;7y ?/7ree of the following :
a) Fuel cells
b) Synchromesh gearbox
c) Overdrive
d) Centrifugal clutch
[18]
^ .
SECTION - II
Q5) a)
b)
Q6) a)
b)
Q7) a)
,
b)
Explain following terms :
{8j.
i)
Casterangle
^ -^v--r^
•
ii) Camber angle
"'
. iii) King pin inclination
=^N,.
iv) Toe-in and toe-out
Write the different types of steering gear boxes and explain any two of .>
them with neat sketch.
[8]
What are the functions of braking system? Explain with neat diagram
hydraulic brake system.
[8]
Explain with a neat diagram the air suspension system.
[8]
Draw and explain three wheeler layout.
[8]
Explain with a neat diagram principle and working of automobile lightening
system.
^
^
[8]
Q8) Write short notes on any three of the following :
a) Power steering.
^ .; . ^
b) Electric horn.
^
c) Shock absorber.
? d) Disc brake.
e) Three wheeler layout.
-2-
[18]
-:
^atyasahebKorelnstfti/teu
tngineencg and Technoioo
•
Scat
No.
"
Total No. of Pages : 3
B . E . (Mechanical) (Part - I I ) (Semester - V I I I ) Examination,
December - 2014
E N T E R P R I S E R E S O U R C E PLANNING (Elective - IV)
"
Sub. Code : 49424
Day and Date iMonday, 01 - 12 - 2014
Total Marks : 100
Time : 10.00 a.m. to 1.00 p.m.
Instructions : 1)
2)
Students should solve any three questions from each section.
Figures to right indicate marks.
SECTION - I
Ql) a)
Define Enterprise. Explain difference between current and traditional
approaches regarding enterprises.
[8]
b)
What arc the advantages to an i n d u s t r y r e s u l t i n g from ERP
implementation?
[8]
Q2) a)
Define Enterprise Resource Planning ( E I ^ ) . Explain evolution of ERP. [8]
b)
- .
Q3) a)
b)
Explain w.r.t. ERP:
i)
MRP
ii)
B i l l of l^aterial (BOM)
iii)
MRPfl
[8]
Enlist various modules comprised in ERP package. Explain with a
detailed example and flow diagram the role o f each module in ERP
implementation,
[10]
• Explain Just in Time (JIT) and Kanban system for effective ERP.
[6]
R-84
Q4) Short Notes: (Any three)
a)
, b)
[18|
Supply Chain Management (SCM)
RoleofCAD/CAMinERP
c)
Product / Production Data Management (PDM)
d)
Distribution Requirement Planning (DRI^)
c)
Quality and Material management module o f ERP package
S E C T I O N - II
Q5) a)
ERP implementation is beneficial to both manufacturer (company) and
customer. Comment.
[10]
b)
Explain the failure / risk factors o f an ERP implementation in detail. [8]
Q6) a)
Explain the role o f consultants, vendors and users in ERP Package
selection.
[8]
b)
W h a t arc d i f f e r e n t phases o f ERP i m p l e m e n t a t i o n ? W h y
package e v a l u a t i o n / selection process is most i m p o r t a n t phase
o f ERP implementation? What are the key factors for evaluating
ERP software?
•
|8|
Q7) a)
What is the importance o f ERP Team training at various implementation
stages?
[8|
b)
Explain w.r.t. ERP implementation:
i)
Pre - evaluation screening
if)
Project planning
-2-
18]
R-84
Q8) a)
Enlist various ERP packages available in market. Explain any one in detail
with its advantages and applications.
b)
[8]
Explain with a case study ERP implementation in any manufacturing
company.
[8]
-3-
Scat
No.
*^rananaoar. ftst KoJ.Ha?otal No. ol'Pages : 3
B . E . (Mechanical) (Part -1) (Semester - V I I ) (Revised) Examination,
December - 2014
FINITE E L E M E N T ANALYSIS
^
Sub. Code: 47981
Day and Date : Monday, 15 -12 - 2014
Time : 2.30 p.m. to 5.30 p.m.
Instructions : 1)
2)
f'^
Total Marks : 100
Attempt any three Questions from each section.
Figures to the right indicate full marks.
3)
4)
Assume if necessary suitable data and state them clearly.
Draw neat hibcled sketch wherever necessary.
5)
Use of non-programmable calculators is permissible.
SECTION - I
Ql) a)
Explain general steps of FEM using a simple 1-D element for thermal
analysis of heat conduction through a composite wall.
[S]
b)
Explain with suitable examples simplification of a model using
symmetry.
^
[8]
Q2) Analyse the axially loaded stepped bar shown in figure below. Use the finite
element method (element and global matrix) to predict the nodal displacements
I/,,
and
at the nodes 2, 3 and 4, and the support reaction R at the fixed
node \{u~ 0). The cross sectional areas are 50 mm^ ,20mm^ and lOmml the
lengths of steps are 10mm each and the modulus of elasticity is 200GPa.[16|
/
/
Nodes: 1,2,3,4
Elements: 1-2, 2-3, 3-4
/
= SON
Q3) a)
'Calculate the shape fiinctions for the following triangular element. And
hence find the temperature at the point (2,2) if the nodal temperatures of
the element are 0 , = 20°C, 0^^100'^Cand 0^.-15O°C.
[8|
R-696
"3
j(8,2)
b)
What are higher order (quadratic, cubic, etc.) elements? Sketch their
shape functions (interpolation polynomials).
[8J
Q4) Write short notes on: (any three) :
1181
a)
Principle of minimum potential energy
b)
Node and element numbering
c)
Least square method
d)
Basic element shapes and behaviour
e)
Boundary value problems
S E C T I O N - 11
Q5) a)
State the steps involved to mode! a mechanical element (e.g., a bracket),
perform a static analysis and view results using commercial FEA
software.
[8]
b)
The following differential equation is available for a physical phenomenon.
d'y/dx" + 50 = 0, 0<x<\0
.
'
h;..' .
The trial function is y=ax{\0-x). The boundary conditions are y(f„^0
and y(io)~0 ^\nd the value of the parameter 'a' by sub-domain method
over the range 0<;c< 10.
[8]
-2-
r
R-696
Q6) a)
A viscous, incompressible and fliUy developed fluid flow between two
parallel plates shown in figure below. Demark the portion of the fluid
with velocity boundary conditions that you would model to save
computational efforts. Also, state typical pressure boundary conditions
at the inlet and outlet.
[8]
-
Inlet
-
.
-
Mia-plane
Outlet
Fluid flow between two parallel plates
b)
Explain how size and number of elements in FE mesh are related and
their effect on the solution accuracy.
[8]
Q7) a)
Explain simplex, complex and multiplex elements with suitable example
and indicate size of element stiffness matrix and load vector in each
case.
(8j
b)
What are interpolation functions? State continuity conditions at
inter-element nodes.
|8|
Q8) Write short notes on: (any three) :
a)
Preprocessing
b)
Coordinate transformation
c)
Natural coordinate system
d)
Isoparametric elements
e)
Bandwidth and its significance
[18]
^aiyasaheb Koie Insiiiute ^
Engineering und Techpotog-.
Warananaaar, Otst. Kolhao.i
R-78
Total No. of Pages: 4
Seat
No.
B. E . (Mechanical) (Semester - VIII) Examination, November - 2014
INDUSTRIAL ENGINEERING
Sub. Code: 49418
Day and Date : Thursday, 27 -11 - 2014
Total Marks : 100
Time : 10.00 a.m. to 1.00 p.m.
Instructions:
1)
Attempt any three questions from each section.
2)
Figures to the right indicates full marks.
3)
Draw sketches wherever required.
4)
Assume suitable data, if required & mention clearly the same.
SECTION - I
Ql)
a)
Define Industrial Engineering, explaining atleast five activities o f industrial
engineering.
[6]
b)
Describe different strategies to meet non u n i f o r m demand.
(6]
c)
W h i c h are various activities o f production control.
[6]
Describe various cost i n v o l v e d i n inventory control.
[8]
Q2) a)
b)
I f parts are produced at 50 units per day. Demand is 5000 units per year.
I f set-up cost is Rs. 100/- and inventory carrying cost is Rs. 10 per yean
There are 300 w o r k i n g days i n year.
[8]
Calculate:
Q3) a)
b)
i)
Economic lot size.
ii)
Total cost.
iii)
Time required to produce one batch.
iv)
Number o f batches.
^
Describe parameters to decide location o f plant.
[8|
F r o m f o l l o w i n g data, forecast the demand o f August and September.
Assume ( a ) smoothing constant = 0.5
[8]
Month
Jan
Feb
March
April
May
June
July
Demand
10
11
14
17
16
19
22
X
1000
RTO.
^'
R-78
Q4) a)
b)
Explain various tools and techniques o f plant layout.
[8J
A project is composed o f activities whose time estimate is given below.
Refer sketch o f network.
1^1
Calculate:
i)
Expected duration and variance o f each activity.
ii)
Critical path and expected project duration.
iii)
Standard deviation.
iv)
Probability o f completing project in 25 days. (Refer normal distribution
chart)
Activity
Optimistic
Most-likely
Pessimistic
Time (days)
time (day)
time days.
1-2
2
2
8
1-3
3
6
15
1-4
2
5
8
2-5
2
5
14
3-6
5
8
11
5-6
2
5
14
4-7
4
4
10
6-8
2
2
2
7-8
3
6
15
8-9
2
5
8
-2-
R-78
S E C T I O N - II
Q5)
Q6)
Q7)
a)
E x p l a i n concept o f productivity and it's objectives.
[9]
b)
Describe how value analysis improves productivity.
[8]
a)
Construct t w o banded process chart for putting refill i n ball pen.
[8]
b)
What are therbligs. Give any five therbligs w i t h it's symbols.
[8]
a)
What are characteristics o f good wages system.
[8]
b)
The element data o f machining operation is given below.
[8]
Rating
Frequency
0.90
90
1
2
0.40
80
1
3
3.20
100
1
4
12.40
80
Xo
5
10.00
80
1
6
6
100
1
7
15
80
Xoo
Element
Observed
No
time (min)
1
I f relaxation allowance 1 2 % and contingency allowance 3 % , Calculate
standard time and production output i n 8 hour shift.
Q8)
a)
What are benefits o f merit rating also compare j o b evalution and merit
rating.
b)
[9]
W o r k e r p r o d u c e d 240 assemblies i n a w e e k o f 4 0 h o u r s , h a v i n g
performance rating o f 120. Study shows w o r k e r was w o r k i n g 8 0 % o f
time. I f allowances are 1 0 % o f normal time.
Calculate:
i)
N o r m a l time.
ii)
Standard time.
-31
[8]
Normal Distribution
Q
— CO
.00
+ C O
.01
.02
.03
.04
.05
.06
.07
.08
.09
.5080
.5478
.5120
.5517
.5160
.5557
.5199
.5239
.5636
.5279
.5319
.5714
.5359
.5871
.5910
.5948
.0
.1
.5000
.5040
.5398
.2
.3
4.
.5793
.5438
.5832
.6179
.6554
.6217
.6255
.6628
.6293
.6664
.6331
.6700
.6368
.6737
.6406
.6772
.6443
.6591
.5
.6915
.6950
.6985
.7019
.7054
.7088
.6
.7
.8
;9
7257
.7291
.7324
.7357
.7389
.7580
.7881
.8159
.7611
.7910
.8186
.7642
.7939
.7673
.7967
.8212
1.0
1.1
.8413
.8643
.8438
.8461
1.2
1.3
.8849
.8665
.6869
.9032
1.4
.9192
1.5
1.6
1.7
1.8
.9332
.9452
.9554
.9641
1.9
.9713
.9719
2.0
2.1
.9772
.9621
2.2
2.3
.9661
.9778
9826
.9864
.9693
.9918
.9896
.9920
2.4
Z
.6103
.5753
.6141
.6808
.6480
.6844
.6517
.6879
.7123
.7157
.7090
.7224
.7422
.7454
.7486
.7517
.7549
.7704
.7734
.7764
.7794
.7823
.7852
.8238
.7995
.8264
.8023
.8289
.8015
.8315
.8078
.8340
.8106
.8365
.8133
.8389
.8465
.8708
.8907
.8508
.8531
.8554
.8577
.8599
.8621
.8686
.8888
.8729
.8925
.8749
.8944
.8770
.8962
.8790
.8960
.8810
.8997
.8830
.9015
.9049
.9066
.9082
.9099
.9115
.9131
.9147
.9162
.9177
.9207
.9222
.9236
.9215
.9265
.9279
.9292
.9306
.9319
.9345
.9357
.9382
.9495
.9505
.9406
.9515
.9418
.9525
.9429
.9535
.9441
.9474
.9370
.9434
.9394
,9463
.9564
.9649
.9573
.9656
.9726
.9582
.9664
.9599
.9678
.9744
.9608
.9686
.9616
.9693
.9625
.9699
.9633
.9732
.9591
.9671
.9738
.9750
.9756
.9761
.9706
.9767
.9783
.9788
.9834
.9793
.9834
.9796
.9638
.9803
.9842
.9808
.9846
.9812
.9850
.9817
.9857
.9871
.9875
.9904
.9927
.9878
.9881
.9884
.9887
.9890
.9906
.9929
.9909
.9931
.9911
.9913
.9934
.9916
.9945
.9959
.9946
.9948
.9949
.9962
.9972
.9951
.9961
.9971
.9963
.9973
.9952
.9964
.9979
.9979
.9980
.9981
.9965
.9986
.9986
.9830
.9868
.9896
.9922
.9901
.9925
.5596
.5987
.6026
.5675
.6064
.9932
.9545
.9936
2.5
.9938
.9940
.9941
.9943
2.6'
2.7
.9953
.9965
.9974
.9955
.9966
.9975
.9956
.9967
.9976
.9957
.9968
.9977
.9969
.9977
.9960
.9970
.9978
.9981
.9982
.9982
.9983
.9984
.9984
.9985
3.0
.9987
.9987
.9987
.9988
.9988
.9969
.9969
.9989
.9990
.9990
3.1
.9990
.9991
.9991
.9994
.9995
.9997
.9994
.9993
.9995
.9993
.9993
.9995
.9997
.9992
.9994
.9992
.9993
.9995.
.9997
.9992
.9994
.9992
3.2
3.3
3.4
.9991
.9994
.9996
.9997
.9996
.9997
.9996
.9097
.9996
.9997
2.8
2.9
.9995
.9996
.9997
.9996
.9997
.9974
.9995
.9997
.9998
^rananagar, Qtsi Kolhaou
S£at
No.
Total No. of Pages : 2
B . E . (Mechanical Engineering) (Semester - V I I ) Examination,
December - 2014
INDUSTRIAL PRODUCT DESIGN (Elective - II)
Sub. Code : 47988
Day and Date : Friday, 12-12 - 2014
Total Marks : 100
Time : 2.30 p.m. to 5.30 p.m.
Instructions : 1)
Answer three questions from each section in a single answer book.
2)
Figure to the Right Indicates full marks to the questions.
3)
Assume any data If necessary and state it clearly, Draw sketches
wherever Necessary.
SECTION -1
Ql) a)
Explain development of quality aspect in product design with suitable
example.
[8]
b)
What is the process for product plarming? How product specifications
are set?
[8]
Q2) a)
What do you mean by robust design of product? How cost of product
is Determined? Explain with suitable example.
[8]
b)
Q3) a)
b)
Differentiate between creativity and innovation.
[8]
" Form Follows the Function". Discuss with suitable example.
[8]
Select the material for following component with reasoning;
[8]
i)
Non stick pan
ii)
L M V Dashboard.
iii)
Dental grinder.
iv)
Heat and corrosion resistance roof material.
RTO,
R - 1344
Q4) Write short notes on (Any three)
a)
Brainstorming.
b)
Design for environment.
c)
Market research.
d)
Product data management.
e)
Value engineering.
[IS]
^
SECTION - I I
Q5) a)
Discuss ergonomic design consideration in the design of centre lathe.[8]
b)
What do you mean by anthropometry? How it helps to solve man
machine Relationship.
[8]
Q6) a)
Distinguish between analog and digital display in context with electrical
Equipment.
[8]
b)
Q7) a)
b)
Discuss ergonomics in industry for safety.
[8]
Explain health and safety consideration in a chemical industry.
[8]
Discuss the importance of Balance, shape. Size, Continuity in a domestic
product with suitable example.
[8]
Q8) Write short notes on (any three)
a)
Work station design.
b)
Ergonomics in automated system.
c)
Concept generation.
d)
Concurrent engineering.
e)
Psychology and mechanics of seeing.
ooo
[18]
3
R-77
Total No. of Pages: 4
Seat
No.
B. E. (Mech.) (Part - IV) (Semester- VHl) Examination,
rai
November- 2014
MECHATRONICS (Revised)
Sub. Code: 49417
Day and Date : Wednesday, 26 - 11 - 2014
Total Marks : 100
Time : 10.00 a.m. to 01.00 p.m.
Instructions :
1) Answer any three questions from each section.
2) Figures to right indicate full marks.
3) Assume if necessary suitable data and state them clearly.
4) Draw neat labeled diagram wherever necessary.
5) Use of non programmable calculators is permissible.
SECTION - I
Ql) a)
What do you mean by mechatronic measurement systems? Give details
about open and close Loop system.
[8]
b)
In multidisciplinary scenario how microcontroller can be used in modem
devices/machines. Explain this concept in detail with suitable block
diagram.
•
..-T
[8]
Q2) a)
b)
Q3) a)
b)
Differentiate clearly between transducers and sensors.
Explain the concept of filters in signal conditioning.
Explainarchitectureof8051 microcontroller.
[8]
_
[8]
[8]
Write an assembly program either for 8085 micro processor or 8051
micro Controller to perform addition o f two 8 bit numbers and store the
result. Use general Purpose registers to store data and result.
[8]
R-77
Q4) Write short notes on (Any Three) :
a)
Digital to Analog conversion.
b)
OP - A M P as integrator.
c)
LVDT.
d)
D flip-flop.
[18]
SECTION - II
Q5) a)
Explain with block diagram PLC system and its following components.
[8]
i)
Input module
ii)
CPU
iii)
Output module
iv)
Memory
b)
What are the advantages and disadvantages o f PLC.
[4]
c)
Draw ladder diagram o f N A N D gate.
[4]
Q6) a)
Following are the sequence o f tasks or steps involved in simple press
process shown in the.
Figure - develop ladder diagram for same.
Press arm
[8]
R-77
[18]
Q4) Write short notes on (Any Three) :
a)
Digital to Analog conversion.
b)
OP - A M P as integrator.
c)
LVDT.
d)
D flip-flop.
SECTION - n
Q5) a)
Explain with block diagram PLC system and its following components.
[8]
i)
Input module
ii)
CPU
iii)
Output module
iv)
Memory
b)
What are the advantages and disadvantages o f PLC.
[4]
c)
Draw ladder diagram o f N A N D gate.
[4]
Q6) a)
Following are the sequence o f tasks or steps involved in simple press
process shown in the.
Figure - develop ladder diagram for same.
[8]
Press arm
"^^^^^1^^:^/
W9
-2-
Slop
Sian
Ons cycie mode
Coniinuous rriode
Mi
R-77
b)
i)
The operator presses the start switch to start the machine, or the
stop switch to stop the machine.
ii)
The machine checks for the part, i f the part is present, process
continues. I f not, the conveyor moves until the part is present.
iii)
Part is locked in the place with clamp.
iv)
The press stamps the part.
v)
The clamp is unlocked, finished piece is moved out o f the press.
vi)
The process stops i f the machine is in one cycle mode, or continues
i f continuous mode is selected.
A bi-directional movable arm is shown in figure; develop the ladder
diagram to control it as per the conditions given below[8]
Moving arm
<
_ ^ — Signal for clockwise rotation
Signal for coimteiclockwisc rotation
Both start and stop switches are push buttons. When system is turned ON,
the motor should rotate continuously, alternating between counter clockwise
and clockwise directions, as the movable armtouches two limit switches RLS
andLLS.
-3-
Q7) a)
b)
Discuss machine tool control terminology.
A control application has following requirementsi)
Pressing push button starts pump A .
^
After 20 minutes pump A should be off.
iii)
After delay o f 10 seconds another pump B should start.
iv)
Pump B should stop after running for 20 minutes
v)
Two pumps should never run simultaneously.
Draw PLC ladder logic to control above operation,
Q8) Write short notes on (any three)
a)
Majority circuit in PLC.
b)
Input/output modules o f PLC.
c)
Master control relay (MCR).
d)
Latching / unlatching Concept in PLC with ladder diagram.
e)
Timers used in PLC.
(D0®®
Engiiieerina end Technotoq.
Scat
No.
•^v'arananacar DiS!
R
KDlh^.L^,
-
692
,
Total No. of Pages: 3
t
r
B . E . (Mechanical) (Revised) (Part - I ) (Semester - V I I ) Examination,
December - 2014
MECHANICAL SYSTEM DESIGN
-
Sub. Code : 47980
Day and Date : Monday, 08 -12 - 2014
Total Marks : 100
Time : 2.30 p.m. to 5.30 p.m.
Instructions: 1)
"
Solve any three questions from each section.
2)
Figures to right indicates full marlu to the question.
3)
Answer to both the sections must be written in single answer book,
4)
Draw neat labelled sketch wherever neccssar}' and use of prograniablc
calculator is allowed.
5)
Assume any data if necessarj' and state it clearly.
SECTION - I
Ql) a)
b)
What are the different types of control devices? Explain the Ergonomic
considerations in the design of the displays.
[8]
What is modeling? What are the different types of modeling?
[8]
Q2) a)
Discuss different methods of increasing pressure capacity of thick
cylinders.
[8]
b)
With neat sketches, compare the distribution of principal stresses in thin
and thick cylinders.
[8]
Q3) a)
A seamless pipe of inner diameter 80mm and made of plain carbon steel
15C8 (S^,=240 N/mm') supplies a fluid under 120 bar pressure to the
single acting hydraulic cylinder of inner diameter 400 mm and made of
gray cast iron FG450. The factor safety based on yield strength and
ultimate tensile strength are 3 and 5 respectively. Determine the outer
diameters of the pipe and the cylinder.
[8]
>.
i
fs>i
RT.O
R - 692
b)
Q4) a)
b)
.
A multi-plate clutch is used to transmit 12 KW power at 1400 rpm. The
inner and outer diameters of contacting surfaces are 70 mm and 100 mm
respectively. The coefficient of friction and the permissible intensity of
pressure for the lining are 0.12 and 0.38 N/mm" respectively.
Detennine;
[10]
i)
The number of pressure plates and friction plates
ii)
The axial force required to transmit the power
iii)
The actual average pressure And
iv)
The actual maximum pressure intensity after wear.
. '
With neat sketch explain the construction of cone clutches.
[8]
What are different types of stresses are acting on cylindrical pressure
vessel shell under combined loading?
[8]
g5) Write Short Notes on Any Three of the following :
a)
Cone clutch
b)
Vessel supports
c)
Aspects of aesthetic design
d)
Different types of modeling
e)
Friction materials.
:;T --r.
"-
[16|
-^- ^
: :-
••
SECTION - II
Q6) a)
Give a comparison between nomial distribution and standard distribution
curve. Give a note on Weibull distribution curve.
[8|
b)
Classify conveyors and explain with neat sketch flat belt conveyor. [8]
Q7) a)
Prove that the minimum difference between number of teeth on adjacent
gears in a change gear block of multi-speed gear box must be at least
four.
[8|
b)
What are the different objectives of material handling system? How will
you classify material handling equipments?
[8|
-2-
r^.
R - 692
Q8) a)
A multi speed gear box is to be designed for a headstock of a turret lathe
foe nine spindle speeds ranging from 60 rpm to 2880 rpm. I f the gear
box is driven by 5KW, 1140 rpm electric motor ;
5 "
i)
Draw the speed ray diagram
ii)
Draw the gearing diagram
iii)
Determine the number of teeth on gears
Assume same module for all gears.
[12
b)
Explain the method of optimum design with Lagrange multipliers through
an example.
[6|
Q9) a)
An inclined belt conveyor having belt inclination of 15" is used for
conveying the bulk material having specific weight of 15000 N/mm\e
belt width is 1000mm while belt speed is 1.75 m/s. If the tlowability
factor ' k ' for the belt is 2 . 5 x l 0 ' \e the capacity of the
conveyor.
[8]
b)
Explain the following terms used in statistical analysis of the engineering
problems:
|8|
:
i)
Mean
ii)
Variance
iii)
Standard deviation
iv)
Standard variable
''
.
QlOj'Wnte Short Notes on Any Three of the following :
a)
Selection of belt from manufacturer's catalogue.
b)
Compound ray diagram.
c)
Optimization of structure diagram.
d)
Types of conveyors.
e)
Population, sample and random variables.
-j---
•.
[16]
^
iatyasaheb Kore Insmuu
Engineering and Technoiot
R-80
Total No. of Pages : 4
Scat
No.
B.E. (Mechanical) (Semester - VTII) Examination, November - 2014
PRODUCTION MANAGEMENT (Elective - III) (Revised)
Sub. Code: 49420
Day and Date : Saturday, 29 -11 - 2014
Total Marks : 100
Time : 10.00 a.m. to 1.00 p.m.
Instructions:
1)
2)
3)
4)
Attempt any three questions from Section I and Section II each.
Figures to the right indicate full marks.
Make suitable assumptions if necessary and state them clearly.
Draw neat sketches and flow diagrams wherever necessary.
SECTION - I
Ql) a)
How production department is related to other functional areas of
business? List the conflicting areas between production and marketing
and their resolution.
[8]
b)
Explain with examples the following strategic options for operations [8]
;
i)
Process technology
ii)
Capacity.
•
'
^
Q2) a)
Explain how a company develops its new product strategies. Describe
the steps with a flow chart the process of new product development
process.
[10]
b)
The past data regarding the sales of special purpose machines is given
below. Using the data, fit the regression line and estimate the sales for
next two years.
[6]
Year
2003 2004
2005 2006
2007
2008
2009
2010
45
49
52
56
62
Sales
(in lakhs Rs.) 35
40
47
RT.O.
R-80
Q3) a)
b)
ifc.
Explain with a diagram the product-process matrix. Wliat is its significance
in process design.
[6].
A company manufactures a product whose demand is a function of
manufacturing cost. The information regarding demand pattern, available
production capacities during regulartime, overtime and other details are
given. Formulate the problem as a Transportation model to determine the
Optimum production levels and means of production for the four periods. ^
[10]
Forecasted demand
Period
2
3
4
1000
2000
1200
1
Demand (units) 700
Available Production Capacity
Period
Regulartime
Overtime
Subcontracting
1
900
350
600
2
1000
350
600
3
1100
350
600
4
700
350
600
Initial inventory : 200 units
Final inventory : 150 units
R.T. Production cost : Rs. 125 / unit
Subcontracting cost: Rs. 175 / unit
Overtime cost: Rs. 150 / unit
Inventory cost/unit/period: Rs. 25
-2-
R-80
Q4) Write sliort notes (any three):
^
[ 3 x 6 = 18]
a)
Use of BER in Machine Selection.
b)
n job 3 machine sequencing problem.
c)
Elements ofPPC.
d)
Product Development Process.
' e)
Capacity Strategies.
SECTION - II
Q5) a)
Explain the following w.r.t. SCM (any two):
i)
Supply chain strategies.
ii)
Manufacturing supply chain.
iii)
Supply chain activities.
[6]
m
b)
Distinguish between JIT and Lean manufacturing give the steps in
implementation of JIT. How the performance of JIT is measured. [10]
Q6) a)
What is the significance of OEE in Total Productive maintenance. Explain
with an example, computation of OEE.
[8]
b)
The following mortality rates have been observed for a certain type of
light bulbs.
Month
1
2
3
4
5
10
25
50
80
100
Percentage
Failing by month end
-3-
R-80
There are 1000 bulbs in use and it costs Rs. 10 to replace an individual
bulb which has burnt out. I f all bulbs were replaced simultaneously, it
would cost Rs. 2.5 per bulb. It is proposed to replace all the bulbs at
fixed intervals and individually those which fail between intervals. What
would be the optimal policy of replacement.
[8]
Q7) a)
Derive an expression for single stage manufacturing model as a function
of machining speed.
[10]
b)
Compute the internal rate of return for a project given the following cash
flows.
[6]
Period
. 0
1
2
3
4
Cash Flows -5,00,000 10,000 25,000 1,00,000 1,25,000
Q8) Write short notes on (Any three):
£
5
6
1,50,000 2,00,000
[ 3 x 6 = 18]
a)
TPM stages.
b)
Replacement of items with increasing cost with time.
c)
Six big losses.
d)
Elasticity of demand.
e)
Production function and factors of Production.
f)
ISO quants.
: v.-:-
-4-
B.E, (Mechanical) (Semester-VIII) (Revised) Examination,
November - 2014
POWER ENGINEERING
Sub. Code : 49419
"
Day and Date : Friday, 28 -11 - 2014
Total Marks : 100
Time : 10.00 a.m. to 1.00 p.m.
Instructions :
1) Solve any three questions from each section.
2) Figures to the right indicate full marks.
3) Neat diagrams must be drawn wherever necessary.
4) Assume additional data if necessary and state it clearly giving
reasons.
Bl
5) Make suitable assumptions, if necessary and state it clearly,
giving reasons.
6)
Use of logtables, non-programmable calculator, is allowed.
SECTION - I
Ql)
a)
Write in detail, resources and the development of power in India.
[8]
b)
Discuss clearly the Indian Electricity Grid code.
[8]
Explain with neat sketch, Pump storage power plant.
[8]
Q2) a)
b)
Write in detail with neat sketch, compressed A i r storage power plant. [8]
Q3) a)
Differentiate clearly between peak load plants and Base load plants. [8]
b)
A power plant has the following annual factors, load factor = 70%,
Capacity factor = 50%, Use factor = 60% Maximum demand is 20 MW.
Find:
i)
Annual energy production.
ii)
Reserve Capacity over and above peak load.
'iii)
Hours during which, plant is not in service per year
[8]
R-79
Q4) Write short notes on the following:
a)
Fuel Cells.
b)
Issues in Power plants.
c)
Present power position in Maharashtra.
[18]
'^-^
SECTION - II
Q5) a)
b)
Q6) a)
b)
Q7) a)
b)
Explain with neat sketch, dissolved oxygen analyser
[8]
Write in detail with neat sketch, Co^ measurement.
[8]
Write in detail superconducting magnetic energy storage.
[8]
Discuss in detail with neat sketch, Ultracapacitors.
[8]
Write in detail, pollution due to Nuclear power plants and their effects on
ecology.
[8J
Explain in detail maintenance procedures of thermal power plant.
Q8) Write short notes on the following:
•
[18]
a)
Nuclear Radiation detector.
b)
National and International protocols on pollution control,
c)
p H measurement.
0®®®
-2-
[8]
>-
^^-s^
.^
U b R A K i
latyasaheb Kore Insmutc .;
Engineering and Technoiog
vVarananscsr Osr Kginen'j
Seat
No.
R "
691
Total No. of Pages : 4
B . E . (Mechanical) (Revised) (Part -1) (Semester - V I I ) Examination,
December - 2014
R E F R I G E R A T I O N AND A I R C O N D I T I O N I N G
Sub. Code : 47979
Day and Date : Friday, 05 - 12 - 2014
Total Marks : 100
Time : 2.30 p.m. to 5.30 p.m.
Instructions: 1)
2)
3)
4)
5)
6)
•
Ql)
Attempt any three questions from each section.
t???^?
Figures to the right indicates full marks.
Use same answer books for the t>vo sections.
Neat diagrams/charts must be drawn wherever necessary.
Use of steam tables, refrigerants/psychromctric charts/tables are
allowed.
Make suitable assumptions if required and state them clearly.
SECTION - I
a)
Describe Electrolux Refrigeration System. How does the use of water
differ in the.
[9]
i)
aqua-ammonia system and.
ii) lithium bromide water system.
b)
Draw schematic diagram of a two stage compression system with flash
gas removal and flash gas intercooling and explain it with the help of
P-h diagram.
"
^
[7]
Q2) a)
How the refrigerants are classified? Explain the procedure to derive
ASHRAE designation.
[7]
What is secondary refrigerants? Where it is used? Explain its
importance.
[5]
Which refrigerants are used in commercial ice plants and why?
[4]
b)
c)
Q3) a)
b)
Why the protection devices are provided for compressors? Explain the
operation of high and low pressure cutouts with suitable examples. 18]
With the help of block diagram explain the working of Linde system.[8]
R-691
Q4) An Ammonia refrigeration system used in ice plant operates between evaporator
temperature o f - 2 0 ° C and condensing temperature of 30°C. It produces
20 tons of ice per day from water of 24°C to ice at -1°C. Using standard
vapour compression cycle determine
a)
Capacity
b)
Mass flow of refrigerant
c)
Temperature at outlet of compressor
d)
Work done
e)
Cop
f)
Ideal cop
g)
Bore and stroke of the single cylinder compressor L / D = 1.25,
Tl^ = 0.85,N= 1000 rpm.
h)
Mass flow of refrigerant if refrigerant is subcooled by 10°C before entering
into the expansion valve Take CP^ = 4.187 kJ/kg. K for refrigerant
NH3.
[16]
^
Cp^ = 4.6 KJ/Kg.K and Cp = 2.8 KJ/Kg.K
Q5) Write Notes on Any Three of the following :
a)
Reverse Brayton cycle.
b)
Effect of ozone depletion and global warming.
c)
Cryogenic engineering & its applications.
d)
Vortex tube refrigeration.
e)
Insulation materials used in refrigeration systems.
[18]
SECTION - I I
Q6) a)
Define effective temperature scale used in comfort chart. Discuss the
factors affecting the thermal balance between the human body and
environment.
[8|
b)
Discuss the importance of ventilation. How does it effect load on air
conditioning system.
[8]
-2-
R - 691
Q7) a)
Enumerate the essential components of the air distribution system and
state their functions.
[7]
b)
Define equivalent diameter, equivalent length in duct sizing and prove
that
nl/5
D = 1.265
(ab)^
(a + b)
Where a and b are the two sides of the duct. D is the diameter of circular
duct.
|9]
Q8) a)
With the help of schematic diagram, explain the working of Air washer.
Show the range of psychrometric processes on psychrometric chart. [7]
b)
Atmospheric air of 35^*0 DBT, 60% RH having pressure of 1.03 bar is
supplied to an air conditioned space af^er removing 0.0042 kg of moisture
at 2 2 X DBT. Find the.
|9]
i)
specific humidity
ii)
Relative humidity
iii)
DPT
iv)
Vapour pressure.
^
Q9) a)
How the energy conservation can be achieved in air conditioning
systems?
[4]
b)
An air conditioning system is designed for theatre when the following
data is available.
Inside design conditions = 21°C DBT, 53% RH, outdoor
conditions = 35°C DBT 26''C NBT minimum temperature of air supplied
to room = 17°C DBT, Total infilteration air = 400 mVhr, Total amount of
freshair supplied = 1600 m^/lir, sensible heat load= 15.43 kw, latent heat
load = 5.38 kw. find the following
112]
i)
amount of the air delivered to the room in m^/hr.
ii)
Percentage of recirculated air
iii)
Refrigeration load on the coils in tonnes of refrigeration
iv)
Dew point temp of the cooling coil
v)
by pass factor.
-3-
R-691
gy^jWrite notes on any three of the following :
a)
Energy requirements of central air conditioning system.
b)
GSHF & ESHF.
c)
Methods of duct design.
d)
Package type air conditioners.
e)
Air distribution norms.
-4-
[18