Maharashtra State Board of Technical Education 2008 Diploma Production Engineering Manufacturing Processes - Question Paper

Sample ques. Paper – I
Course Name :- Production Technology/Production Engineering
Course code :- PG/PT
Semester :- Third
Subject :- Manufacturing Processes
Duration :- three hours Marks: 80

Instructions-

1) All ques. are compulsory
2) Figures to the right shows full marks
3) Use of non-programmable calculator is permissible
4) presume suitable data if necessary


Q1: Attempt any Eight. [Marks:(8x2=16)]

a) Name and sketch any 4 parts of rolled parts.

b) elaborate causes of defects in rolling?

c) Define-Hot extrusion and cold extrusion.

d) Write any 2 functions of tail-stock of a lathe.

e) Why cast iron is used as a material for lathe guide ways?

f) Why reaming is necessary?

g) Write any 2 specifications of drilling machine.

h) List any 4 trend making materials.

i) describe brazing and soldering.

j) State any 2 applications of extrusion.


Q2: Attempt any Three. [Marks:(3x4=12)]

a) Classify forging presses and write description of any 1 of them.

b) Compare ranging from closed die forging and open die forging.

c) Why cold rolled parts are stronger than hot rolled parts?

d) State advantages and disadvantages of direct extrusion.


Q3: Attempt any Three. [Marks:(3x4=12)]

a) Draw a neat and tagged sketch of die set

b) Why clearance is necessary on die?

c) Compare blanking and piercing operations along with neat sketches

d) Prepare a strip-layout for a provided part and compute percentage utilization and percentage scrap. Material - Brass. Thickness-2mm All dimensions are in mm.


Q4: Attempt any 2 [Marks:(2x8=16)]

a) What is the working principle of TIG welding? discuss with neat sketch. State the advantages and disadvantages of it.

b) A pressure vessel is to be manufactured from sheet metal, which welding method you will use? define it with neat sketch.

c) i) How neutral, oxidizing, and reducing flames are found in welding torch? Draw their sketches .
ii) Differentiate ranging from brazing and soldering.


Q5: Attempt any 3 [Marks:(3x4=12)]

a) State trend making allowances. define any two.

b) Compare moulding sand and core sand.

c) How characteristics of moulding sand influence the performance of moulding?

d) define hot chamber die casting with neat sketch.


Q6: Attempt any 3 [Marks:(3x4=12)]

a) Which kind of casting method is used for making precision parts? discuss with neat sketch.

b) elaborate the advantages and disadvantages of centrifugal casting?

c) Why down milling is preferred to up-milling?

d) i) define facing operation with sketch.
ii) State different kinds of drills.

Earning:   Approval pending.