This document contains exam questions for the subjects of Management and Entrepreneurship, Design of Machine Elements - I, Dynamics of Machines, and Manufacturing Process - III. It lists multiple choice and long answer questions covering topics such as characteristics of SSIs and WTO, stresses in shafts and bolts, flywheels, belt drives, balancing of rotating masses, cams, forging, and rolling processes. The questions are part of a fifth semester engineering exam and assess students' understanding of key concepts in these mechanical and production engineering subjects.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
Have you ever wanted a Ruby client API to communicate with your web service? Smithy is a protocol-agnostic language for defining services and SDKs. Smithy Ruby is an implementation of Smithy that generates a Ruby SDK using a Smithy model. In this talk, we will explore Smithy and Smithy Ruby to learn how to generate custom feature-rich SDKs that can communicate with any web service, such as a Rails JSON API.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
2013-June: 5th Semester Mechanical Engineering Question Paper
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- -Wlitc various characterjstics ol SSIs. -*",.]', t OJ., 105 Marks)
Writc.functiorrs ol WTO. 'Y) -,.}., ;". ",..-,.-,
Max. Marks::1.Q0
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wrirc tuncriorrsotwTo _7al, i;;;;.u,,F.xphin varrous steps ro stan a SSL ,:/ aa .', (10 Marks)
writetuncrionsofrECSoK. rrit'"' ''
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writc objectir es. funcrions and single windou concept of Disrricr Industries centre.
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a. Writc various points to be considered for project identification.
b. Vrite differences between pERT and CpM.
c. Ilxplain various aspects ofproject feasibility studies.
10Ar,51
Fil"th Scmester E.E. Degree Examination, June/July 2013
Managefirent and Entrepreneurship
Ntrte: ,ilrrspcr FIVE futt questions, selecting
at least TWO questions from each part.
PART-A
a. Det'ine managcnlent. Write various characteristics of management.
b. Write various loles of a n-ranager.
c. Explain any two important modern management approaches.
a. Write dilferenc'es between strategic planning and tactical plannihg.
b. Explain various typ6s of decisionr. ::5'|*^i!"..b'
c. Explain various sleps'of planning. ._: .
l. Explaiu the vrliou: sources olrecruilment.
b. Write advantages and disadvantages of Iine and staff organization.
c. Write various principles of organiz.$tj_oq ',. .i
Write differences between coordination and cooperation (05 Marks)
write
.differences among autocratic, participative and Free-Rein Leadership styles. (05 Marrrs;
Explain various methods of es(q6lishing contiali:,,." (10 Marks)
';
) PART_B ,'
../ :,.
r'irc dillerenccs anrong lntrapreneur. Entrepreneur and Manager. (05 Marks)
Write.important.qualities of an entrepreneur. ',,.. .r' (05 Marks)
Lxplcrn va ous stages in entrepreneurial process. 110 Marks.l
2. USN
Time: 3 hrs.
l0MEs2
(05 Marks)
Fifth Semester B.E. Degree Examination, June/July 2013
Design of Machine Elements - I
Max. Marks:100
Note:1. Answer FIVE full questions, selecting
at least TIV'O questions from each parl.
2. Use of design dota Hand book is permitted.
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PART_A
What are the basic requirements of machine elements? Explain briefly.
What are the lactors to be considered for selection of material for a machine component?
(05 Marks)
A hollow shaft of 40 mm diameter and 25 mm inner diameter is subjected to a twisting
moment of 1 1 8 N-m, a axial thrust of 9806 N and a bending moment of 79 N-m. Calculate
the maximum compressive and shear stresses. (10 Marks)
2 a. The brasses ofan automobile engine connecting rod have worn, so as to allow play which
gives shock loading equivalent to a weight of 5886 N fatling through a height of 0.2 mm.
The connecting rod is 250 mm long and has a cross sectional area of 3x10-am2. Determine
the stress induced in the connecting rod. Compare the maximum stress induced with that ofa
static load of 5886 N. (06 Marks)
la.
b.
c.
b.
c.
3a.
b. A hot rolled steel shali is subjected to a torsional moment that varies from 300 N-m
clockwise to 100 N-m counterclockwise as the bending moment at the critical section varies
from 400 N-m to - 200 N-m. Neglecting the stress concentration effect, determine the
required shaft diameter. The material has an ultimate strength of_ 550 MPa and a yield
strength o1410 MPa. Take the endurance limit as half the ultimatC sirength and a factor of
safbty as 2. Assume surface, size and load lactor for bending as I:.111,1.1765 and 1 and that
for torsion as 1.05263,1.1765 and 1.7 respectively. )
-,
4 a. An M20x2 steel bolt of 100 mm long is subjected to impact load. The energy absorbed by
the bolt is 2 N-m.
i) Determine the stress in the shank ofthe bolt if there is no threaded portion between the
nut and bolt head.
ii) Determine the stress in the shank if the entire length of the bolt is threaded.
Assume modulus of elasticity lor steel as 206 GPa.
1.of2
A bolt is subjected to a direct tensile load of 30 kN and a transverse shear force of 15 kN.
Material of the bolt has a normal stress of 350 MPa at yield and Poisson's ratio of 0.25.
Compute the root diameter ofthe bolt according to:
i) Maximum shear stress theory of failure and
ii) Von Mise's criterion for failure.
Hence suggest suitable size ofthe bolt. Take a value of3 for lbctor ofsafety. (07 Marks)
Determine the maximum stress induced in the following cases taking stress concentration
into account:
i) A rectangular plate 50 mm wide, 8 mm thick and with a central hole of i0 mm is loaded
in axial tension of 14.7 kN.
ii) A stepped shaft, stepped down from 45 mm to 30 mm .rqith a fifiet radius of 6 mm is
subjected to a twisting moment of 98 N-m. (07 Marks)
Derive Soderberg's equation for designing of a machine element, with change in cross
section, to sustain loads that fluctuate between two limits. (05 Marks)
(15 Marks)
(08 Marks)
3. 10ME52
4 b. Determine the size of the bolts for the loaded bracket shown in Fig. Q4 (b), if the allowable
tensile stress in the bolt rnaterial is limited to 80 MPa. (12 Marks)
5a.
b.
6a.
7a.
b.
l0o
h = ]4. Assume key*ay
(06 Marks)
(10 Marks)
in the weld shown in
(10 Marks)
50---4
ItZ
f
Fig. Q7 (b)
+. lils
1*-"'--'t
lLiLh ,,71 lA
terms of shaft diameter, taking key width b = I and key thickness
'4
factor as 0.75.
Design completely the screw, handle and the nut of a screw jack of capacity 40 kN. The
maximum lift is limited to 0.2 m. The screw and the handle are made of C40(40C8) steel and the
nut and the cup are made ofcast iron. Also find the efficiency ofthe screw. Check the screw for
2of2
supforf
Fig. Qa (b)
PART - B
Prove that a hollow shaft is stronger and stiffer than a solid shaft of same length, weight and
material. (08 Marks)
A hollow propeiler shaft of 0.6 m outside diameter and 0.3 m inside diameter is used to
drive a propeller of a marine vessel. The shaft is mounted on bearings 5 m apart and it
transmits 6 MW power at 100 rpm. The maximum axial propeller tkust is 600 kN and shaft
weighs 60 kN. Determine i) Maximum shear stress developed in the shaft and ii) Angle of
twist of the shaft between the bearings. Assume the modulus of rigidity as 84 GPa.1t2 naar*;
If a shaft and key are made of samg material, determine the length of the key required in
b. Design a rigid flange coupling to fansmit 18 kW at 1440 rpm. The allowabte shear stress in
the cast iron flange is 4 MPa. The shaft and keys are made ofAISI 1040 annealed steel with
ultimate strength and yield stress values as 518.8 MPa and 353.4 MPa, respectively. Use
ASME code to design the shaft and the key. (14 Marks)
A bracket is supported by means of four rivets of same size as shown in Fig. Q7 (a).
Determine the diameter of the rivet if the maximum shear stress in the rivet is 90 N/mm2.
Determine the maximum normal stress and the maximum shear stress
Fie. Q7 (b)
tI+r2K
T
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v
Fig. Q7 (a)
+ + $-i- --;"lt'l
I
o.I
buckling load. (20 Marks)
4. USN
la.
b.
10ME54
Fifth Semester B.E. Degree Examination, June/July 2013
. Time: 3 hrs.
Dynamics of Machines
Max. Marks:100
Notez l. Answer FIVE full questions, selecting
at least TII/O questions from each part.
2. Use of drawing/graph sheets is permitted,
3. Missing data assume accordingly,
PART - A
i) Explain the equilibrium of two force members and tlree force members. (04 Marks)
ii) Give signiticance of static force analysis of mechanisms. (02 Marks)
For the static.equilibrium of the mechanism shown in Fig.Q11b1, find the required input
torque T2. The dimensions are AB :, 150 mm, BC - AD = 500 mm, DC : 300 mm,
CE : 100 mm and EF - 450 mm. (14 Marks)
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What is the function of a flywheel? How does it differ from that of a govemor? (05 Marks)
A single cylinder, four stroke I.C. engine develops 30 KW,ofpower at 300 rpm. The turning
moment diagram for. the expansion and compression strokes may be taken as isosceles
triangles on bases 0 to n and 3n to 4n radius respectively and the work done during
compression is 25Yo of that of during expansion. Work done during suction and exhaust is
neglected. Find the massmoment of inertia of flywheel to keep the speed fluctuatio ns 1.5%o
on either side of the mean speed. Sketch the T.M. diagram and mark the points of max. and
min gpeed on the diagram. ( t 5 Marks)
a. -.Explain:
i) Stip, ii) Creep, iii) Initial tension and iv) Centrifugal tension in belt drive.
b. An open belt drive is required to transmir 10 KW from a motor running
",
uoo ,orjliffllli
is l2 mm thick and has a mass density ol0.00l gm/mmr. Sale stress in the belt is not to
exceed 2.5 N/mm2. Effective diameter of the driving pulley is 250 mm whereas the speed of
the driven pulley is 220 rpm. The two shafts are 1.25 m apart.If the coefficient of friction is
0.25, determine the width of the belt. (t4 Marks)
A shaft carries four masses A, B, C and D,200,300, 240 and 360 kg respectively, revolving
at radii 90, 70, 100 and 120 mm respectively. The distance from the plane A,.other planes
are at 270 mm, 420 mm and 720 mm respectively. Angle between the crank A and B is 45",
B and C is 75o, C and D is 130". Balancing masses are replaced 120 mm and 100 mm from
D and A respectiely. The disrance between them being 500 mm. Find the balancing masses
and their angular positions if they are placed at a radius of 100 mm.
1of2
Fig.Q1(b)
(20 Marks)
5. I
5a.
b.
.,
10ME54
PART - B
Explain the terms primary balancing and secondary balancing as used in balancing of
reciprocating masses. (05 Marks)
The piston of a 4-cylinder vertical inline engine reach their uppermost position at 90o
interval in order of their axial position. Pitch ofthe cylinder: 0.35 m. crank radius : 0.12
m. Iength ol CR - 0.42 m. The engine runs at 600 rpm. lf the reciprocating parts of each
engine has a mass of 2.5 kg, hnd the unbalanced primary and secondary forces and'couples.
Take the central plane ofthe engine as reference plane.
6 a. Define: i) Sensitiveness
b.
ii) Stability
lower arms are attached to the sleeve at a dista(tc. of35 mm fiom the axis
ss ofthe Sleeve is 54 kg and the mass of each ball is 7 kg. Determine the
d when the radius of rotation of the ball is225 inm. What will be the rangeequilibrium when the radius of rotation of the ball is 225 inm.
(I5 Marks)
(04 Marks)
are iijvoted on the axis of
rotatlon
rotation.
la.
b.
ofspeed for this position ifthe liictional resistance to the molion olthe sleeve is equivalent
to a force of 30 N at the sleeve. (16 Marks)
Derive an expression for the gyroscopic couple C = Ioro, from the f,rst principle. (05 Marks)
Explain the gtroscopic effect ofsteering, pitching and rolling ofa naval ship in a sea.
(09 Marks)
Analyze the stability ofa two wheel vebicld taking a tum and derive the necessary equation.
l' :
(06 Marks)
For a symmetrical tangent cam operating a roller follower, the least radius of the cam isFor a symmetrical tangent cam operating a roller follower, the least radius of the cam is
30 mm and the roller radius is 15 mm. the angle of ascent is 60o, the total lift is 15 mm and
the speed ofthe cam shaft js 300 rpm. Calculate: r".
'of the cam (i.e., the distance between the cam centre and the
us and the angle ofcontact of cam with straishr &ont)and the angle ofcontact with straight front)
follower at the beginning of the lift. where the roller just touches
the nose (i.e:, flank merges into the nose) and the afex..d the circular nose. Assume
ihqf+hAf;.iannrl.,ellhc1rwaanq<ncnrend;Ae.Ahf (20 Marks)that there is no dwell belween ascent and descent.
. :*****
nose centre,
2 of2
6. Er
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=s 3
b9p
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eq
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as
c)
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E8E
Derive an expression for forging pressure ahd-load acting in plane
Coulomb's friction at the interf,ace.
List and explain die design parameters in lorging.
Briefly explain forging defects and residqal stresses in forging.
Sketch and explain different tlpes ofrolling mills.
Discuss maximum possible reduction in rolling process.
I]SN
-.Time: 3 hrs.
10ME5s
Max. Marks:100
(08 Marks)
(06 Marks)
(06 Marks)
(10 Marks)
(10 Marks)
strain considering
(08 Marks)
(06 Marks)
(06 Marks)
(06 Marks)
(04 Marks)
(08 Marks)
(06 Marks)
(06 Marks)
(08 Marks)
(08 Marks)
(04 Marks)
in sheet metal
(10 Marks)
(10 Marks)
(10 Marks)
(10 Marks)
Fifth Semester B.E. Degree Examination, June/July 2013
Manufacturing Process - lll
Note: Answer FIVE full questions' selecting
dt leost TWO questions from each psrt
PART-A
How are metal forming processes classified? Explain with sketches.
Explain Tresed and Von-Mises criteria.
Discuss ihe plane stress and plane strain concepts.
Explain the effeets of following parameters in metal working processes:
i) Temperature .
ii) Strain rate iii) Friction and lubrication
Comment on: i) Deformation zone geoiTetry.
ii) Residual stresses in wrought productsi.
PART - B
a. Derive an expression for drawing load by slab analysis.
b. Explain optimal cone angle and dead zone formation in drawing.
c. Sketch and explain tube drawing process.
a; ''Write a note on extrusion equipment, die design and lubrication.
b. Sketch and explain extrusion of seamless tubes.
c. Discuss extrusion variables.
a. Explain with figures working ofprogressive and compound die arrangements
working.
b. With sketches, explain the operations: i) Rubber forming, ii) Deep drawing.
a. With a neat figure, explain the following forming methods:
i) Explosive forming
ii) Eleclromagnetic forming
b. Discuss with flow chart powder metallurgy process.
7. USN
Time: 3 hrs.
roMEs6
(08 Marks)
in terms ol P shaft
(06 Marks)
Fifth Semester B.E. Degree Examination, June/July 2013
Turbo Machines
g
.E..,
C2
.E(!
-+B
5d
Ls
a:
(r<
o
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E
Note:Ans,wer Frw full questions, selecting
Max' Marks: I 00
at least TWO questions from each pirt
I a' Explain at least six differences b",*ffiuchines and positive dispracement machines.
b' Two
-geometricalry
similar pumps are running at same speed of r000 rpm. one ,rfl: HJ:?impeller diameter of 0.3 m and lifts water at the rate of 20 litrevsec agai6t
"i!"J Ir rs *.Determine the head and impe[er diameter ofother pump to deliver halith" di."harg".
c. Define specific speed ofa turbine. Obtain an expression for the same
power, speed and head.
2 a' ait enters a compressor at a static pressure of 15 bar and static temperature of l5"C and a
flow velocity of50 m/s. At_exit, the static pressure is 30 bar, static temperature is 100.C and
flow velocity is 100 m/s. The outlet is I m above the inlet. nind i) rserltrofi.'"r]ung" in to,ur
enthalpy ii) Actual change in total enthalpy. Take Cp for air as iOOS :4k. i* ,r.ugb. obtain an expression fo_r polyropic efficiency for a compressor in terms of pressure ratio
and temperature ration. Further express stage.ffi"i"n"y in ierms of poryropi"
"m"i"n"y
u"apressure ratio. Also draw the relevant T_S diagram. (10 Marks)
3 a. Show that the alternate form ofEuler's turbine equation can be expressed as folrows:
* _
(v'-v,')*(ui- ul)-(vi - v,i)
2
Draw the relevant velocity triangles. (10 Marks)
b' In an axial flow turbine dischange blade angles are 20" each for both stator and rotor. The
steam speed at the exit of fixed blade is 140 m/s. The ratio 5 = 0., at entry and 0.76 at
U
exit ofrotor. Find the inret brade rotor angre, power deveroped for a flow rate of2.6 kg/s and
degree ofreaction. (t0 Marks)
4 a. Draw the velocity triangles for axial flow compressor. From the triangres show that degree
of reaction for axial flow compressor is given by, n=f (tunl +tanyr). Assume axial
velocity to remain constant. y, and y, are angles made by rerative verocities with the axial
direction.
b. A radial outward flow turbomachine has no inlet whirl. The btade speed
", "*i
i, [fi['i[i]at the inlet. The radial velocity remains constant. Inlet blade angle is 45". Show that the
degree olreaclion forthis machine is siven bv. * -
2+cotF,
4
I of 2
. (10 Marks)
8. t
!
10ME56
PART _B
5 a. Draw the inlet and exit velocity triangles for a pelton wheel turbine. Show that maximum
hydraulic efficiency is given UV, (,f
r. L* =
remains constant.
. zcos'cx.,
best speed rs grven by. nb =
-| + cos' cr. r
I + cosB,
The internal and external diameters ofan inward flow reaction turbine are 1.2 m and 0.6 m
respectively. The head on turbine is22 m and velocity of flow through the runner is constant
and is equal to 2.5 m/s. The guide blade angle is l0' and the runner vanes are radial at inlet.
Ifthe discharge at outlet is radial. Find i) Speed ofturbine. ii) Vane angle at outlet
Assume that relative velocity
(10 Marks)
(10 Marks)
(10 Marks)
runs at 1000 rpm,
m/s. Vanes are set
Vane angle at inlet
(10 Marks)
6a.
8a.
b.
iii) Hydraulic efficiency iv) Draw velocity triangles.
Explain the following with reference to centrifugal pump:
i) Manometric effic iency with expression.
ii) Cavitation in pumps.
iii) Need for priming.
iv) Pumps in series.
Outer diameter of a pump is 50 cm and inner diameter is 25 cm and
against a head of 40 m. Velocity of flow is constant and is equal to 2.5
back at an angle of 40" at the outlet. Width at outlet is 5 cm. Find, i)
ii) Work done by impeller iii) Manometric efficiency.
7 a. Draw the inlet and exit velocity triangles for a single stage steam turbine. Further prove that
maximum blade efficiency is given by,
(qo)*- =
"ot'
o,
Assume V., : V., and B, = B1 - (10 Marks)
b. The following data refer to a 50o/o reacrion turbine. D = I .5 m, t[g] = 0.72, p) = 200 ,
v,,/
N = 3000 rpm, find i) Blade efficiency ii) Determine percentage increase in blade
efficiency and rotor speed if the rotor is designed to run at its best theoretical the rotor is
designed to run at its best theoretical speed, the exit angle (cx,1) is 20'. Blade efficiency for
, (10 Marks)
With the help of H-Q ptot explain the phenomena of surging in centrifugal compressors.
A centrifugal compressor delivers 18.2 kg/s of air with a total pressure ratio
"to
I'i.H::?
is 15000 rpm. Inlet total temperature is l5'C. Slip coefficient is 0.9, power input factor is
1.04. Efficiency is 0.8. Calculate overall diameter of impeller. (10 Marks)
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