Manufacturing Process-II B.E Model Question Paper : pescemandya.org

Name of the College : P.E.S College of Engineering
University : Visvesvaraya Technological University
Department : Automobile Engineering
Subject Name : Manufacturing Process – II
Year : July 2010
Degree : B.E
Sem : IV
Website : pescemandya.org
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/pescemandya.org/4668-qp.pdf

Manufacturing Process-II Question Paper :

Fourth Semester B.E. Degree Examination, July 2010
Time : 3 Hrs
Max. Marks : 100

Related : P.E.S College of Engineering Material Science and Metallurgy B.E Model Question Paper : www.pdfquestion.in/4666.html

Note : Answer any FlVE fUll questions selecting at least two questions from each part.
PART-A :
1 a. With neat sketches give nomenclature of a single point cutting tool. (07 Marks)
b. Briefly explain the mechanism and types of chip formation. (07 Marks)
c. What is meant by tool signature? Explain each term of a tool designated as 8 -12-10-7-5-15-1.5 (06 Marks)

2. a. Derive an expression for shear plane angle with respect to orthogonal cutting. (07 Marks)
b. Explain the effect of the following cutting parameters and tool life (i) Cutting Speed (ii) Tool Geometry (06 Marks)

c. A 75 mm diameter mild steel bar was turned at 220 rpm to get a good life of 14 min. The rpm was changed to 260 and tool life obtained was 10 min. Find out the value of n and C. (07 Marks)

3. a. Briefly explain the desirable properties of cutting tool material. (07 Marks)
b. Briefly explain the salient features of coated carbides and ceramics. (06 Marks)
c. What are the properties of a good cutting fluid (07 Marks)

4. a. Explain the were work holding devices in a capstan lathes (05 Marks)
b. Differentiate between capstan and turret lathes. (05 Marks)
c. Explain the turret tooling layout for production of hexagonal headed bolt. (10 Marks)

PART-B :
5 a. With neat diagram explain the constructional features and working principle of a shaper. (10 Marks)

b. A shaper is operated at 120 cutting strokes per min and is used to machining a work piece of 250 mm length and 120 mm width. Feed is 0.6 mm/ stroke and the depth of cut is 6 mm a approach and over travel distances are 25 mm each. Calculate the total machining time. (05 Marks)

c. Differentiate between a shaper and planer. (05 Marks)
6. a. Explain with a neat sketch the geometry of twist drill.
b. Give the classification of drilling machines
c. With simple sketches explain the following process.
(i) reaming (ii) Trepanning

7. a. With sketches differentiate between up milling and down milling ? (06 Marks)
b. What is indexing ? Explain compound indexing? (06 Marks)

c. Clearly indicate the plate number and indexing movements to be made to divide the periphery of a work piece into 87 divisions using compound indexing? The following indexing plates are available.
: 15,16,17,18,19,20. :
21,23,27,29,31,33.
37,39,41,43,45,49.

8. a.Write a note on the following (06 Marks)
(i) Abrasives (ii) Bonding Process
b. Explain with neat sketch surface grinding machines. (08 Marks)
c. List the parameters used in selections of grinding wheels. (06 Marks)

Heat Transfer ( P08AU46) Model Question Paper :
PART A :
1. (a) Explain the different modes of heat transfer. (8 Marks)
(b) Derive the general heat conduction equation in cylindrical coordinates. (12 Marks)

2. (a) Explain :
i) Thermal conductivity ii) Thermal diffusivity (4 Marks)
(b) Derive expression for radial heat transfer and temperature distribution along the radius of a hollow cylinder whose inside and outside surfaces are maintained at steady state temperature Tl and T2 respectively and constant thermal conductivity. Also obtain expression for overall heat transfer co-efficient based on inner radius. (10 Marks)

(c) Derive an expression for critical thickness of insulation of a cylinder and explain the significance of critical thickness of insulation. (6 Marks)
3. (a) Derive an expression for temperature distribution and heat flow in a fin of finite length with an adiabatic end. (8 Marks)

(b) An electronic semi conductor device generates 38 x 10-3kcal/hr of heat. To keep the surface temperature at the upper safe limit of 75°0, it is desired that the generated heat should be dissipated to the surrounding environment which is at 30°0.

The task is accomplished by attaching aluminium fins 0.5mm2 square and 10mm to the surface. Workout the numbers of fins if thermal conductivity of fin material is 165kcal/m-nOK and the heat transfer co-efficient is 10.75kcal/m2nok. Neglect the heat loss from the tip of the fin. (12marks)