Machine Tools B.Tech Question Paper : vardhaman.org
College : Vardhaman College Of Engineering
Degree : B.Tech
Department : Mechanical Engineering
Semester : V
Subject : Machine Tools
Document type : Question Paper
Website : vardhaman.org
Download Previous / Old Question Papers :
June – 2014 :https://www.pdfquestion.in/uploads/vardhaman.org/6373-BT5S%20JUNE14.pdf
December – 2013 : https://www.pdfquestion.in/uploads/vardhaman.org/6373-BT5R11-DEC13.pdf
Vardhaman Machine Tools Question Paper
Four Year B. Tech V Semester Supplementary Examinations
(Regulations : VCE-R11)
(Mechanical Engineering)
Date : 14 June, 2014 FN
Time: 3 hours
Max Marks: 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
Related / Similar Question Paper : Vardhaman B.Tech Design of Machine Members-I Question Paper
June – 2014
All parts of the question must be answered in one place only :
Unit – I :
1. a) What are the objectives of machine tool? Explain the various elements of machine tool? 8M
b) What are the principle angles of single point cutting tool and explain:
i. Back rake angle
ii. Clearance angle 7M
2. a) What are the characteristics of cutting tool materials? List out the different types of cutting tool materials. 8M
b) A high speed steel tool is used for machining a work piece of mild steel. While machining at a cutting speed of 30m/min. The useful life of the tool is found to be 1 hour. What will be the tool life if the same tool is used to cut at a speed of 40m/min, other parameters remaining the same? Assume the value of exponent (n) of standard taylor’s equation = 0.12. 7M
Unit – II :
3. a) Describe the taper turning attachment on a lathe. What are its merits and demerits over other methods of taper turning? 8M
b) What are the attachments used on a center lathe and what purpose do they serve? 7M
4. a) Explain with a neat sketch the working principle of a lathe? 10M
b) Explain the classification of lathes? 5M
Unit – III :
5. a) Draw a neat sketch and explain the principal parts of a shaper. 7M
b) Explain with the help of a neat sketch the angular cutting operation on a shaper? 8M
6. a) Find the gear combination and indexing movement necessary for 139 divisions. 8M
b) Draw a neat sketch of a plain milling cutter and explain it in detail? 7M
Unit – IV :
7. a) What is drilling? What is the tool used for drilling? Brief out the reason for the moderndrilling machine. 7M
b) Illustrate the salient design features of vertical precision boring machine. 8M
8. a) List out the advantages & disadvantages for vitrified and silicate bond. 8M
b) What is the cutting tool used for performing the grinding operation? On what factors the cutting tool selection is made in the case of grinding?7M
Unit – V :
9. a) Classify Jigs and Fixtures. 5M
b) Compare grinding, lapping and honing process. 10M
10. Draw a neat sketch and explain any three types of locating devices. 15M
December – 2013
B. Tech V Semester Regular Examinations,
(Regulations: VCE-R11)
Machine Tools :
Mechanical Engineering
Date : 7 December, 2013
Time : 3 Hours
Max. Marks : 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
Unit – 1 :
1. a) Draw a neat sketch and explain the nomenclature of single point cutting tools. 10M
b) Write short notes on coolants used in metal cutting. 5M
2. a) In orthogonal turning of a 50mm diameter mild steel bar on a lathe, the following data were obtained. Rake angle = 150, cutting speed = 100m/min, feed = 0.2mm/revl, cutting force = 180kg, feed force = 60kg. Calculate the shear plane angle, coefficient of friction, cutting power, chip flow velocity, shear force, if the chip thickness = 0.3mm. 10M
b) Write a short note on chip breakers. 5M
Unit – 2 :
3.a) Illustrate the neat block diagram of lathe & label the parts. 8M
b) Explain the following operation in lathe:
i. Eccentric turning
ii. Facing 7M
4. a) List out the different operation which can be performed on automatics, turret & capstan lathes and its requirement which carry specifications. 8M
b) Describe the consideration while planning the process sheet for a particular job during manufacturing. 7M
Unit – 3 :
5. a) Describe the main parts of a shaper with neat sketch. 8M
b) What is planning? Explain the working principle of a planer. 7M
6. a) Mention the different types of milling machine. Explain vertical milling machine with neat sketch. 8M
b) Explain the following milling methods with neat sketch:
i. Up or conventional milling
ii. Down or climb milling 7M
Unit – 4 :
7. a) Draw a neat sketch of a twist drill and explain the nomenclature. 8M
b) Draw a neat sketch and explain the following operations on a drilling machine:
i. Boring
ii. Tapping 7M
8. a) Draw a neat sketch of a surface grinding machine and explain its working. 8M
b) What are the materials used in the manufacture of grinding wheels? What properties do they impart to the wheels? 7M
Unit – 5 :
9. a) What is the use of fixtures? List out the different types of broaching machines. 8M
b) Explain with neat sketch of continuous broaching machine. 7M
10. a) List out the difference between jigs and fixtures. 7M
b) What are the important considerations in jigs and fixtures? 8M