ANIL KUMAR - GateMentor What is the difference between wheel dressing and wheel turning?. ... LBM 5. EBM Ans. Refer Q. No. 2.5 in Unit 2. Q.2 Briefly explain the various process parameters

ANIL KUMAR

6Manufacturing Science - II

SUBJECT CODE : 337555 (37)

CSVTU PREVIOUS YEARS’ QUESTION PAPERS

Nov-Dec 2007 6-1

Apr-May 2008 6-2

Nov-Dec 2008 6-3

Apr-May 2009 6-5

Nov-Dec 2009 6-6

Apr-May 2010 6-7

Nov-Dec 2010 6-8

Apr-May 2011 6-9

Nov-Dec 2011 6-10

Apr-May 2012 6-12

Nov-Dec 2012 6-13

Apr-May 2013 6-14

Nov-Dec 2013 6-15

Apr-May 2014 6-16

Nov-Dec 2014 6-17

Apr-May 2015 6-18

Nov-Dec 2015 6-19

: SARASWATI SHIKSHA MANDIR, NEAR TIKARAPARA POLICE STATION, SANTOSHI NAGAR, RAIPURRAIPUR

SCHOLARSHIP TESTFOR GATE 2018 ASPIRANTS

Test PatternTest Date

th18 Sep. 201630 Questions 50 Marks 90 Minutes

9630520016RAIPUR

BHILAI : PLOT NO. A-213, STREET NO.-27,NEAR CANARA BANK, SMRITI NAGAR, BHILAI

MECHANICAL CIVILNEW BATCHES FOR

GATE 2018

0788-6499334BHILAI

9630520016RAIPUR

BHILAI

: SARASWATI SHIKSHA MANDIR, NEAR TIKARAPARA POLICE STATION, SANTOSHI NAGAR, RAIPURRAIPUR

: PLOT NO. A-213, STREET NO.-27,NEAR CANARA BANK, SMRITI NAGAR, BHILAI

STARTING ON

MECHANICAL ENGINEERING

TH29 AUG. 2016 - BHILAI TH15 SEP. 2016 - RAIPUR

CSVTU PREVIOUS YEARS’ QUESTION PAPERS |6-1

FOR DESCRIPTIVE SOLUTION REFER GATEMENTOR PUBLICATION (MANUFACTURING SCIENCE - II) BOOK FOR CSVTU

Nov-Dec 2007

UNIT-1

Q.1 Differentiate hot & cold forging.

Ans. Refer question 3.17 in unit 3

Q.2 Distinguish clearly between drop forging and press forging process with reference to the process & product obtained.


Q.3 What are the basic rules followed for designing upset forging dies?.


Q.3 Describe the methods of forward and backward extrusions.


UNIT-2

Q.1 Differentiate sheet, Plate and strip.

Ans. Refer Q. No.4.2 in Unit 4.

Q.2 Explain various types of rolling stand arrangements in rolling mill.


Q.3 Discuss the term draught in rolling. What are the various types of defects in rolled products?.

Ans. Refer Q. No. 4.13 in Unit 4.

Q.4 Describe the method of tube rolling


.

UNIT-3

Q.1 Differentiate Punching and Blanking


Q.2 Describe the methods of reducing shearing force in press working


Q.3 What are the considerations in press tool design? What is a scrap strip layout?


Q.4 Discuss the advantage of jigs and fixtures during machining. State the basic rules for location

Ans. Not in Syllabus

UNIT-4

Q.1 Define the term grinding?


Q.2 What is the difference between wheel dressing and wheel turning?.


Q.3 Discuss the method of creep feed grinding.


Q.4 Explain the principle and kinetic arrangement of cutting spur gear on gear hobbing machine.


UNIT-5

Q.1 Write the mechanical of material removed in following un-Conventional machining process:

1. EDM 2. ECM 3. AJM

4. LBM 5. EBM


Q.2 Briefly explain the various process parameters that effect EDM Process.


6-2|MANUFACTURING SCIENCE - II

MECHANICAL eryc GATEMENTOR

Q.3 Describe the methods of manufacturing conical components by power spinning process..


Q.4 Discuss the method of calculating Blank diameter for manufacturing a particular type of thread by thread rolling method.


Apr-May 2008

UNIT-1

Q.1 Discuss machine forging process w.r.t. principles, process, limitations, products, advantages.


Q.2 Discuss the various steps involved for forging of a crank shaft


Q.3 Describe various types of extrusion process and their merits and demerits.


UNIT-2

Q.1 Define angle of bite & cambering of rolls?


Q.2 A Strip of 400 mm width and 10 mm thickness of low carbon steel having 0.2% carbon, 0.4% Mn and

zero Cr is hot rolled at 1000 0 C to thickness of 7 mm in a rolling mill stand having steel rolls of 800mm diameter. Rolling is carried out at a speed of 4 is

equal to 70 2N mm . Determine the rolling load.


Q.1 A billet of area of section 150mm 150mm is rolled to 120 height in a rolling mill with 600 mm roll

diameter at temperature of 1100 0C are 3 /secm .

The yield strength of material is 2N mm . The mill is

driven by meter which runs at 950 rpm and power is transmitted through a reduction gear box and a pinion box. The efficiency of gear box is 0.8 and of inion box is 0.98. The coefficient of friction is bearing = 0.06 and roll neck diameter = 360 mm. Determine the motor power required

Ans. Refer Q. No.4.23 in Unit 4

Q.1 What are the different methods of tube drawing? Describe the salient features of each method.


UNIT-3

Q.1 Match the columns:

I II

Holes in Showers Slots in Cooler Panels

Making washes Jig

Lancing Perforating

Drill – Bush Peircing & Blanking


Q.2 A washer with 12.7 mm internal hold and outside diameter of 25.4 mm is to be made from 1.5 mm thick strip of 0.2% carbon steel. Considering elastic recover of material, find: 7

(i) Clearance, (ii) Blanking die-opening size,

(iii) Blanking punch size,

(iv) Piercing punch size.


Q.3 A hole 100 mm diameter is to be punched in a steel plate of 6mm thick. The material is cold rolled C 40 steel for which the maximum shear strength can be taken as 550 MPa, with normal clearance on the tools, cutting is completed at 40% penetration of the punch. Give suitable diameters for the punch and die, and shear angle on the punch in order to bring the work within the capacity of a 200 kN press available in the shop.




Q.4 Describe the 3-2-1 principle of jigs, design and discuss about various clamping and indexing devices.


UNIT-4

Q.1 How a grinding wheel is designated?


Q.2 Discuss the effect of various grinding parameters on grinding wheel performance?


Q.3 What are the different grinding process? Describe them w.r.t. applications with the help of neat sketches


Q.4 Explain the principle of gear shaping. How it differs from gear hobbing?


UNIT-5

Q.1 Which process give maximum & minimum M.R.R. among the following

EBM, LBM, ECM, USM,AJM.

Ans. AJM & ECM.

Q.2 Describe the processes of USM and discuss the effect of:

(i) Frequency of tool oscillation

(ii) Amplitude of tool oscillation

(iii) Grit size on cutting rate


Q.3 How conical, cylindrical and parabolic shapes can be produced? Explain in detail.


Q.4 Discuss the working principle, advantages & disadvantages of thread rolling.


Nov-Dec 2008

UNIT-1

Q.1 Why forging is preferred for manufacturing of

heavy duty parts.

Ans. Refer question 3.6 in Unit 3.

Q.2 Explain the working of steam and air type forging press and compare its performance with other type of presses.


Q.3 It is desired to forge a gear blank by die forging, as per the demotion calculate the stock size tacking into account. All the necessary allowance the wastage of material in the form of flash should not be more than 25%. Take scale allowance per heat as 3.5% of weight of forging the density of steal is

37.85 /gm cm

.

30 mm40 mm

40 mm 100 mm

50 mm

40 mm


Q.4 Explain the principle of extrusion and compare forward extrusion with reverse extrusion.




UNIT-2

Q.1 Explain what is angle of bite.


Q.2 What are the various components of a rolling mill? Explain the importance of each component.


Q.3 Describe working of a continuous rolling mill and explain important features of Roll-pass design

Ans. Refer Q. No. 4.6,4.7 in Unit 4.

Q.4 Illustrate the method of tube drawing and explain the process capability.


UNIT-3

Q.1 Differentiate between piercing and blanking operations.


Q.2 It is required to punch a hole of 5 mm dia. in a sheet metal 6 mm thick. The shear strength of sheet material is 800 M/mm2. Verify whether it is possible to punch the hole, if not, what is the maximum thickness of sheet, to make this hole by punching.


Q.3 Design an indexing for drilling 6 (six) holes, 15 mm in diameter, on a circular plate of 150 mm dia. The pitch circle diameter for holes is 100 mm.

P C D

100mm6

2

45

3

|1

15mm 6 Holes

150 mm .


Q.4 Explain the principle of 3-2-1 pin location.


UNIT-4

Q.1 Explain the principle of centre-less grinding?


Q.2 Give ISI specifications of grinding wheel. Explain the terms grit, grade and structure..


Q.3 Explain by means of block diagram the arrangement of gears in a gear hobbing machine. How will you cut helical gears?.

Ans. Not in Syllabus.

Q.4 What is the principle of gear generation? Explain

Ans. Refer Q. No.4.9, 4.19 & 4.13 in Unit 4.

UNIT-5

Q.1 Give three basic advantage of un-conventional machining


Q.2 Explain the principle, equipment and the process parameters of Electrical-Discharge Machining (EDM)..


Q.3 Explain the principle of Power-spinning for the purpose of making conical shapes.




Apr-May 2009

UNIT-1

Q1. What are the types of forging methods which are generally used.


Q.2 Explain operations that normally employed in forging.


Q.3 What are the allowances that are normally provided in forging:


Q.4 Explain the extrusion principle and hot and cold

extrusion processes.


UNIT-2

Q1. Explain in brief how does cold rolling differ from hot rolling in terms of process and product.


Q.2 Explain the Roll pass sequences for making a 12 mm rod from 100 x 100 mm billet.


Q.3 Explain various rolling stand arrangements, with neat sketches.


Q.4 What do you understand by the term ‘roll piercing’? Explain with a simple sketch


UNIT-3

Q.1 What are various types of presses? Just give their names.


Q.2. Determine the die and punch sizes for blanking a circular disc of 20 mm diameter from a C20 steel sheet whose thickness is 1.5 mm.

The clearance to be provided is given by 0.0032C t Z

Shear strength of annealed C 20 steel is 294 MPa.


Q.3 A hole 100 mm diameter is to be punched in a steel plate of 6mm thick. The material is cold rolled C 40

steel for which the maximum shear strength can be taken as 550 MPa, with normal clearance on the tools, cutting is completed at 40% penetration of the punch. Give suitable diameters for the punch and die, and shear angle on the punch in order to bring the work within the capacity of a 200 kN press available in the shop.


Q.4 What is the six point location principle? Explain it with the help of suitable sketches.


UNIT-4

Q.1 Name the commonly used bond materials for grinding wheel?


Q.2 What is the marking system followed in case of grinding wheels? Explain the individual elements


Q.3 Explain the method of cutting gears by milling.


Q.4 Explain the principle of gear hobbing.


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UNIT-5

Q.1 List the names of unconventional machining processes.


Q.2 Explain principle of EDM, with neat sketches.


Q.3 Explain principle of ECM with neat sketch.


Q.4 What are advantages of thread rolling?


Nov-Dec 2009

UNIT-1

Q.1 What are the types of forging methods, which are generally used?


Q.2 Explain the operations that are normally employed in forging.


Q.3 What are the allowances that are normally provided in forging.


Q.4 Explain extrusion principal and hot and cold extrusion processes


UNIT-2

Q.1 Explain in brief how does cold rolling differ form hot rolling in terms of process and product.


Q.2 Explain the roll pass sequences for making a 12 mm rod form 100 100 mm billet.


Q.3 Explain various rolling stand arrangements, with neat sketches..


Q.4 What do you understand by the term roll piercing? Explain with a simple sketch.

Ans. Refer Q. No. 4.17 in Unit 4

UNIT-3

Q.1 What are various types of presses? Just give their names.


Q.2 Determine the die an d punch sizes for blanking a circular disc of 20 mm diameter form a c 20 steel whose thickness is 1.5 mm


Q.3 A hole 100 mm diameter is to be punched in a steel plate of 6 ,mm thick. The material is cold rolled c 40 steel for which the maximum shear strength can be

taken as 550 mpa with normal clearance on the tools cutting is completed at 40% penetration of the punch. Give suitable diameter for the punch and die, and shear angle on the punch in order to bring the work within the capacity of a 200 kn press available in the shop


Q.4 what is the six point location principle? Explain it with the help of suitable sketches..




UNIT-4

Q.1 Name the commonly used bond material for grinding wheels?


Q.2 what is the marking system followed in case of grinding wheels? Explain the individual elements


Q.3 Explain t he method of cutting by milling..


Q.4 Explain the principle of gear hobbing?


UNIT-5

Q.1 List the names of unconventional machining processes?


Q.2 Explain principle of EDM, with neat sketches:


Q.4 What are advantages of thread rolling:


Apr-May 2010

UNIT-1

Q.1 Define the term ‘Flash’ and ‘Gutter’ in forging.


Q.2 Explain the forging operations and principles. Discuss the advantage of forging.


Q.3 List the defects normally found in the forged components with causes.


Q.4 Describe the various methods of extrusion process.


UNIT-2

Q.1 What is a four high mill. Ans. Refer Q. No. 4.4 in Unit 4. Q.2 Explain with help of sketch, the various roll

arrangement used in rolling mill..


Q.3 Define the term “specific roll pressure”. Discuss the important parameters in rolling.


Q.4 Describe the process of manufacturing hot pierced tube with neat sketch.


UNIT-3

Q.1 Mention the use of :

(i) Stripper Plate

(ii) Knockout

(iii) Bolster Plate

(iv) Pressure pad in press working operation.?


Q.2 How do you classify the press working operations? Explain salient features of any one operation..


Q.3 With the help of neat diagram, explain the difference between progressive die and compound die..

Ans. Refer Q. No.5.12in Unit 5.



Q.4 What are locators? Mention the important consideration to be made in location of work piece.


UNIT-4

Q.1 A grinding wheel is designated as 30 A 36 H 6 VB. What the letter ‘H’ Indicates.


Q.2 Why balancing is necessary in grinding wheel? What are the different types of internal grinders? Describe them?


Q.3 Describe how ‘Through feed’ and ‘in feed’ methods differ in centre less grinding.


Q.4 Give a line diagram to show the setup of hobbing machine for cutting a spur gear and explain the process for the same?


UNIT-5

Q.1 What are the function of dielectric fluid in EDM process.


Q.2 What is the electron beam machining? Sketch the setup and indicate its main elements


Q.3 Describe the principle and process of flow process


Nov-Dec 2010

UNIT-1

Q.1 What is the role of lubricant in forging and where it is applied?.


Q.2 What are the consideration in upset forging die design.


Q.3 Explain forging practice and process capability.


Q.4 Explain forward and backward extrusion with their principal, advantages, disadvantages and application


UNIT-2

Q.1 Explain principle of drawing.


Q.2 Explain Roll pass design for continuous mill.?


Q.3 Explain principal and setup for tube drawing process.


Q.4 Explain rolling and types of rolling

Ans. Refer Q. No. 4.3In Unit 4.

UNIT-3

Q.1 Define Jig and Fixture?


Q.2 Explain principle of location and damping in Jig and fixture.


Q.3 What are the different types of process used in press working and explain criteria of selection of presses.



Ans. Refer question 5.6 & 5.3 in Unit 5.

Q.4 Explain component of simple press with suitable block diagram.


UNIT-4

Q.1 Explain principle of gear generation?


Q.2 Explain specification of grinding wheel with an example and also explain terms used in specification. .


Q.3 Explain the various gear manufacturing process other than machining.


Q.4 Explain principal motion and kinetic arrangement of gear hobbing?


UNIT-5

Q.1 What are the advantages and disadvantages of non-conventional machining processes over conventional machining process.


Q.2 Explain principal and types of thread rolling with their advantages and disadvantages.


Q.3 What are the mechanics of metal removal in non-conventional machining process.


Q.4 Write short notes on (any two) :

(i) L.B.M. (ii) U.S.M. (iii) E.D.M

Ans. Refer question 2.6,2.11,2.12,2.17 & 2.18 in Unit 2.

Apr-May 2011

UNIT-1

Q.1 Why forging is preferred over other manufacturing process like casing etc?.


Q.2 Illustrate by means of a suitable diagram the working, advantages, and applications of steam and air type dropping hammer.


Q.3 What is extrusion? Compare forward and backward extrusion giving suitable example.


UNIT-2

Q.1 Differentiate between: 2

(1) Sheet and Plate (2) Tube and Pipe


Q.2 How will you classify rolled products based on:

(i) Steel shapes & sections. (ii) Quality of steel.


Q.3 Explain the principle, advantage and application of a continuous rolling mill.


Q.4 Differentiate between tube drawing and wire drawing as regards the equipment and production rate.


UNIT-3

Q.1 Difference between: (i) Piercing and punching (ii) Slitting and notching.




Q.2 A washer having 50 mm outer diameter and 10 mm hole in the centre having 0.8 mm thickness has to be made on a progressive die in which piercing and blanking are done at two different stations. The

ultimate shear strength of mild steel is 2120N mm .

Calculate the press tonnage.


Q.3 It is required to punch a hole of 10 mm diameter in a sheet plate. What is the maximum thickness of the

plate so that it is possible to punch the given shear

strength of mild sheet 2600N m , compressive

strength of punch material = 21800N mm ..


Q.4 Explain the basic principle of Location, Clamping and indexing. Give two examples of clamping devices..


UNIT-4

Q.1 What is the principle of gear generator.


Q.2 How will you specify a grinding wheel? Explain the term grit, grade and structure


Q.3 Explain the principal motion and the kinematic arrangement of gears in a Gear Shaping Machine?


Q.4 Compare Cylindrical Grinding and Centre less grinding as regards to the equipment and field of application.

Ans. Refer Q. No. 1.15 & 1.16 in Unit 1.

UNIT-5

Q.1 Write the full form of LASER


Q.2 What are the advantages, applications and limitations of Non-Conventional machine process.


Q.3 Write short –notes on>

(i) Electro-Chemical machining

(ii) Electron-Beam Machining


Q.4 Explain the procedure of power spinning of a cylindrical shape.


Nov-Dec 2011

UNIT-1

Q.1 Why forging is preferred over casing? Give three reasons?


Q.2 What are different types of dies used in forging? Explain their specific uses and advantages.


Q.3 Explain the basic principle of extrusion process. What are its advantage &limitations.


Q.4 It is desired to forge a gear blank by die forging, as per the demotion calculate the stock size tacking

into account. All the necessary allowance the wastage of material in the form of flash should not be more than 25%. Take scale allowance per heat as 3.5% of weight of forging the density of steal is

37.85 /gm cm .

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UNIT-2

Q.1 Name the essential components of a Rolling Mill.


Q.2 Explain different type of rolling methods by means of suitable diagrams. Explain their field of application.


Q.3 Compare wire drawing with tube drawing as regards the principle, set-up and the process capability.


Q.4 What are the basic advantages and limitations of rollings as compared to machining? Discuss also the defects in Rolling.


UNIT-3

Q.1 Differentiate between Slitting & Notching..


Q.2 Explain the basic mechanism of ‘shearing’ Differentiate amongst piercing, punching and blanking as press-working operations.


Q.3 Illustrate the uses of following in case of jigs & Fixtures.

(i) Locating buttons

(ii) Adjustable locators

(iii) Vee-locators


UNIT-4

Q.1 Why the profile of gear is made involute?


Q.2 What are the constituents of a Grinding Wheel? Explain the procedure of manufacturing of Grinding Wheel?


Q.3 Draw the diagram of a tool and cutter grinder and explain its use by two examples.


Q.4 Explain the procedure of manufacturing a spur gear on Gear Shaping Machine. What tools and accessories are required?




UNIT-5

Q.1 Explain in brief, the spin ability test.


Q.2 Compare the following two processes with respect to the basic principle, machining accuracy, surface finish & cost of machining?

(i) Electrical Discharge machining

(ii) Electro-chemical machining

Ans. Refer Q. No.2.6 & 2.9 in Unit 2.

Q.3 Discuss the advantages and limitations of thread rolling process.


Apr-May 2012

UNIT-1

Q1. Define the process of “forging”.


Q.2 With a neat sketch explain the working of steam hammer forging machines?


Q.3 Explain the salient features of upset forging.


Q.4 With neat sketch explain the concept of forward of direct extrusion..

Ans. Refer question 3.27in Unit 3.

UNIT-2

Q1. What do you understand by “Drawing?.


Q.2 Differentiate between hot and cold rolling. What is the effect of hot and cold rolling on microstructure of cast metals?.


Q.3 Explain in details surface and structural defects in rolling process.

Ans. Refer Q. No. 4.14in Unit 4.

Q.4 Discuss various methods for drawing tubes..


UNIT-3

Q1. What is meant by press working? Where is it applied?.


Q.2 Explain any three of types of dies in brief.


Q.3 Classify presses according to type frame, type of drive, slide actuation and according to action.


Q.4 Write down ten principles of jigs and fixture design.


UNIT-4

Q.1 Define the process of grinding


Q.2 Write down special features of grinding process


Q.3 Explain the process of centre less grinding with the help of neat sketch.


Q.4 Explain the terms “Gear lapping” and gear honing.

Ans. Refer Q. No.1.28 & 1.32 in Unit 1.



UNIT-5

Q.1 Why is unconventional machining so called? How they are different from conventional machining?.


Q.2 Explain the principle and working of Electrical Discharge Machining with neat sketch (EDM)..


Q.3 Write down the various advantages of electro chemical grinding (ECG).


Q.4 Write down the merits and demerits of thread rolling.


Nov-Dec 2012

UNIT-1

Q1. Define extrusion process


Q.2 State briefly the following method of forging.

(i) Drop forging (ii) Press forging

(iii) Machine Forging.


Q.3 What are the different defects in a forging? State the design consideration in a forging


Q.4 How are the extrusion process classified. Compare between forward and backward extrusion process. Give suitable sketch


UNIT-2

Q1. Define drawing process.


Q.2 With suitable sketch give the complete classification of rolling mills..


Q.3 What is Roll Pass Design? With neat figure state breakdown passes, leader passes and finishing passes.


Q.4 State the purpose and different methods of tube drawing. Give suitable figure.


UNIT-3

Q1. Define degree of freedom.


Q.2 Define the following press working operations:

(i) Blanking (ii) Punching (iii) Perforating

(iv) shaving (v) Bending (vi) Drawing

(vii) Squeezing.


Q.3 State the working between jigs and fixtures. State the principle of location.


UNIT-4

Q.1 Define grinding wheel truing and dressing.


Q.2 With suitable figure explain briefly alpha numeric system for the complete specification of a grinding wheel.




Q.3 With a neat sketch explain briefly external cylindrical grinding and surface grinding.


Q.4 State the operation of spur gear cutting on a milling machine giving a neat sketch.


UNIT-5

Q.1 List different methods of unconventional machining.


Q.2 Draw a neat sketch of electric discharge machining (EDM). Write principle and working, advantages, disadvantages and applications of EDM.


Q.3 What is flow turning? How will you get conical shape from this process? State advantages and application also?


Q.4 With neat sketch briefly explain the process of thread rolling. State its advantages and limitations also.


Apr-May 2013

UNIT-1

Q.1 Why forging is preferred over casing?.


Q.2 What are the basic rules followed for designing upset forging dies.


Q.3 What are the allowances that normally provided in forging.


Q.4 Explain extrusion principle and hot and cold extrusion process.


UNIT-2

Q.1 What is the angle of bite?.


Q.2 Explain various types of rolling stand arrangement in rolling mill


Q.3 Explain “roll pass design” for continuous mill with neat sketch


Q.4 Describe the common method for tube drawing.


UNIT-3

Q.1 What do you mean by stacking?.


Q.2 Compare the cutting forces when shear is , 3t t and

din normal condition. Also show graph between maximum load and distance of punch travel.


Q.3 It is required to punch the hole of 10 mm, diameter in mild plate. What is the maximum thickness of

plates so possible to punch the hole 2600s N m ,

1800c aMp .


Q.4 Describe 3-2-1 principle location with proper fixture as applied to jigs and fixture




UNIT-4

Q.1 Grinding wheel designated by “46A36H6VB”. What the letter ‘A’ and ‘H’ indicates?.


Q.2 What is the difference between wheel dressing and wheel truing?.


Q.3 Explain principle and kinematic arrangement of cutting spur gear on gear on gear hobbing machine


Q.4 In Grinding wheel explain the terms Grit, Grade structure.


UNIT-5

Q.1 Describe the various process parameter that effect the EDM process.


Q.2 Describe “LBM” with neat sketch, advantage, disadvantage and application


Q.3 Explain following terms in USM:

(i) Feed mechanism (ii) Tool

(iii) Abrasive slurry:.


Nov-Dec 2013

UNIT-1

Q.1 Why forging is preferred over casting?


Q.2 What are the consideration in upset forging die design?


Q.3 Describe the common forging defects


Q.4 Explain forward & backward extrusion with their principle, advantages, disadvantage and applications


UNIT-2

Q.1 What is angle of bite? Ans. Refer Q. No. 4.16 in Unit 4. Q.2 Explain various types of rolling stand arrangements

in rolling mill. Ans. Refer similar Q. No. 4.4 in Unit 4.

Q.3 Discuss the term draught in rolling.


Q.4 Describe the common method for tube drawing.


UNIT-3

Q.1 Define Jig & Fixture?


Q.2 Classify presses according to type of frame.


Q.3 Explain 3-2-1 principle applied to jigs & fixtures.

Ans. Refer similar Q. No. 3.24 in Unit 3.

Q.4 Explain single action, double action & triple action presses?




UNIT-4

Q.1 Define the term Grinding?

Ans. Refer question 1.1 in Unit 1

Q.2 Explain the process of making a grinding wheel.


Q.3 Explain the terms gear lapping gear honing.

Ans. Refer question 1.32 & 1.28 in Unit 1

Q.4 Explain the procedure of making a spur gear on gear shaping machine. What tools & accessories are required.


UNIT-5

Q.1 Why is unconventional machining so called? How they are different form conventional machining?


Q.2 Explain the principle & working of electrical discharge machining with neat sketch.


Q.3 Describe Electrochemical Grinding (ECG)..


Q.4 Write down merits & demerits of thread rolling


Apr-May 2014

UNIT-1

Q.1. Enumerate the advantages of mechanical working of metal over other manufacturing process?


Q.2 What are the main considerations in designing a forging? State and explain.


Q.3 What are common forging defects? State their causes and remedies


Q.4 Describe ‘hydrostatic extrusion’ and give its advantages and specific applications


UNIT-2

Q.1 Explain what do you understand, by the terms ingot, slab, bloom and billet?


Q.2 What is meant by breakdown passes in rolling? Explain various methods available with their application.


Q.3 Describe different kinds of rolling mills, give their merits, limitations and applications.


Q.4 Distinguish between wire drawing and tube drawing.


UNIT-3

Q.1. Discus the term “Scrap strip layout”.


Q.2 Describe various types of dies. Mention, the situation when they are used.


Q.3 Define the term ‘Jig’ and ‘Fixture’ and explain following locating principle:



(i) Principle of fool proofing (ii) Principle of extreme position

(iii) Principle of least point.


Q.4 Discuss, the following consideration in die design for press working :

(i) Clearance between die and punch

(ii) Angle of shear on die and punch


UNIT-4

Q.1. Explain briefly the standard marking system of grinding wheel.


Q.2 Sketch and explain centreless grinding and the three methods of external cylindrical centreless grinding.


Q.3 What are the various factors to be considered in selection of grinding wheel? Discuss each in detail.


Q.4 Describe gear hobbing process giving its kinematic arrangement, characteristics.


UNIT-5

Q.1 Explain the principle of flow turning.


Q.2 Describe LBM and give the advantages limitation and applications.


Q.3 Give Describe EDM and given the advantage limitations and applications.


Q.4 Describe various type of thread rolling processes.


Nov-Dec 2014

UNIT-1

Q.1 Explain super finishing process.


Q.2 Discuss the economic involved in the grinding process in brief.


Q.3 What are abrasive? Discuss its types and material used to makes abrasive particles.


Q.4 Discuss in brief : (i) Honing (ii) Lapping


UNIT-2

Q.1 Explain electro chemical grinding (ECG).


Q.2 What is unconventional machining? Discuss its advantages and limitations against Conventional machining process.


Q.3 Explain abrasive Jet Machining on the basis of process parameter and surface finish obtained with specific with specific application.


Q.4 Explain the following: (i) Ultrasonic Machining (USM) (ii) Laser Beam Machining (LBM)


UNIT-3



Q.1 Differentiate between HOT and COLD working.


Q.2 Explain the process parameter of extrusion, discuss extrusion of seamless tubes.


Q.3 Explain the defects found in extruded materials.


Q.4 Describe 3-2-1 principle of tools and fixture used in the forging process.

Ans. Refer question 3.24 in Unit 3..

UNIT-4

Q.1 Write wire drawing principle.


Q.2 Discuss roll separating forces and effect of front and back tension and friction.


Q.3 Explain roll passes design for continuous mill.


Q.4 Explain rolling principle and write types of rolling mills with classification of rolled products.


UNIT-5

Q.1 Discuss spring back effect.


Q.2 Explain different shearing operations with neat diagram.


Q.3 What Write and explain principle of bending operation and also explain Bend allowances.


Q.4 Explain the following term:

(i) Spinning and stretch forming

(ii) Embossing and coining.


Apr-May 2015

UNIT-1

Q.1 What is meant by Grind ability?


Q.2 Describe the different methods and applications of

centreless grinding.


Q.3 Name the different bond materials used for making grinding wheels. State their characteristic and applications.


Q.4 What is Lapping? With the help of neat diagram, explain the principal of vertical spindle lapping machine.


UNIT-2

Q.1 Name the important parameter that are considered in selecting a particular non-conventional machining method.

Ans. Refer question 2.4 in Unit 2 Q.2 Discuss in short the applications, advantages and

limitations of an EDM Process.


Q.3 Explain the principal of ECM with a neat sketch. Also explain the various process parameters of ECM Process.

Ans. Refer question 2.9 in Unit 2. Q.4 What is AJM process? Explain why its not suitable

for soft materials.




UNIT-3

Q.1 What is the difference between impression die forging and flash less forging?


Q.2 Discuss Forging Pressure. Why are they considered better in performance than drop hammers?


Q.3 Write a short note on Upset Forging.


Q.4 Explain in short different types of hot extrusion process. Name also the various extraction defects.


UNIT-4

Q.1 Can the application of external tension affect flat rolling process? How


Q.2 Differentiate between tandem rolling mills and cluster mills.


Q.3 With the help of a neat diagram, explain the rolling parameters and their effect on the process.


Q.4 Explain the process of wire drawing with the help of a neat diagram.


UNIT-5

Q.1 How does embossing differ from coining?


Q.2 What do you understand by clearance between punch and die.


Q.3 What is bending? Explain the various methods of bending.


Q.4 Discuss the important considerations in sheet metal drawing operations.


Nov-Dec 2015

UNIT-1

Q.1 Define the term ‘grindability’


Q.2 What is the marking system followed in case of grinding wheels ? Explain the individual elements of the marking system from the standpoint of the functioning of the wheel.


Q.3 What are the various types of surface grinding approach possible? What are their specific advantages and application?


Q.4 Write short notes (any two)

(i) Lapping process

(ii) Honing process

(iii) Buffing process

Ans. Refer question 1.28,1.32 & 1.35 in Unit 1.



UNIT-2

Q.1 What do you mean by ‘unconventional machining?

Ans. Refer question 2.1 in Unit 2. Q.2 Explain EDM process with its process parameters.

Ans. Refer question 2.6 in Unit 2. Q.3 Explain the mechanism of metal removal in ECM.

Ans. Refer question 2.9 in Unit 2. Q.4 Explain ‘electron-beam machining’. Why is electron

–beam machining hazardous?


UNIT-3

Q.1 Define the terms ‘flash’ and ‘gutter’ in forging.


Q.2 Distinguish clearly between drop-forging and press-forging processes with reference to the process and product obtained. List the advantages of forging of metals.


Q.3 Discuss the defects normally found in forged components with its appearance, causes and remedies.


Q.4 Explain with sketches, the difference between direct extrusion and indirect extrusion.7


UNIT-4

Q.1 What is ‘angle of bite’ in rolling?


Q.2 What are various roll arrangements used in rolling mill? Explain with neat sketches. 7


Q.3 What is meant by ‘shape-rolling operation’? Discuss ring rolling and thread rolling with the help of neat sketched.


Q.4 Distinguish between wire drawing and tube drawing with sketches.


UNIT-5

Q.1 What is ‘spring back effect?


Q.2 How do you classify the press-working operations? Explain salient features of any one operation.


Q.3 A hole 60 mm diameter is to be produced in steel plate 2.5 mm thick. The ultimate shear

strength of the plate material is 450 2/ mmN . If the

punching force is to be reduced to half of the force using a punch without shear, estimate the amount

of shear on the punch. Take percentage penetration as 40%.


Q.4 Explain briefly :

(i) Notching

(ii) Blanking

(iii) Stretch forming


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Documents

ANIL KUMAR - GateMentor What is the difference between wheel dressing and wheel turning?. ... LBM 5. EBM Ans. Refer Q. No. 2.5 in Unit 2. Q.2 Briefly explain the various process parameters