Department of Technical Education & Board of Technical Examinations 2006 Diploma Production Technology - Question Paper

CODE: M303
3rd Semester Diploma (Supplementary) Examination, 2006
MECHANICAL BOARD
PRODUCTION TECHNOLOGY
Time: three Hours Max.Marks:100

Note: i) part – I is compulsory.
ii) ans any 2 full ques. every from parts – II,III,IV.

part – I
1. a) Fill in the blanks with improper word / words: [marks five x one = 5]

i) 3 jaw chuck is also called as …………
ii) The capstan & turret lathe tailstock is changed by …………
iii) The lip clearance angle of the drill is …………
iv) If the cutter and work piece rotate in the identical direction then it is
called ………… milling.
v) A device which holds and lockets the work piece but not guides
the tool is called …………
b) What is cutting fluid? List various kinds of cutting fluids. [marks 5]

part – II
2. a) Name the 5 methods of taper turning. discuss briefly with a neat
sketch taper turning by “form tool method”. [marks 7]

b) How do you classify lathes ? [marks 5]

c) If conicity is 1/30 and length of taper is 300 mm. obtain the large
diameter of the work piece, if the small diameter is 80 mm. [marks 3]

3. a) List out any 5 lathe accessories and 5 lathe attachments.[marks 5]

b) provide the classification of single point cutting tool used in a lathe.
[marks 5]

c) Draw the neat sketch of a capstan lathe and tag its parts. [marks 5]

4. a) discuss briefly with a neat sketch, “Radial Drilling” machine. [marks 7]

b) discuss briefly with neat sketches how reaming and trepanning
operation performed in drilling machine. [marks 5]

c) Determine the spindle speed needed for drilling a mild steel plate of
20 mm thickness with a cutting speed of 25 m/min and the
drill diameter of 20mm. [marks 2]

part – III
5. a) What is milling? How do you classify milling machines? [marks 5]

b) Mention the functions of the following, with reference to column and
knee kind milling machine:
i) Front brace
ii) Overhanging arm
iii) Table
iv) Arbor
v) Column. [marks 5]

c) How do you differentiate ranging from plain milling machine and universal
milling machine ? [marks 5]

6. a) discuss down milling with a neat sketch. [marks 5]

b) describe the subsequent with reference to milling machine:
i) Cutting speed ii) Feed
iii) Depth of cut iv) Machine Time. [marks 5]

c) obtain the diameter of the milling cutter used to cut the teeth on a
100 mm diameter steel blank, running at a speed of 250 r.p.m and
the cutting speed being 25 m/min. [marks 5]

7. a) discuss the hydraulic shaper mechanism with a neat sketch. [marks 9]

b) How do you machine an irregular surface in a shaper ? [marks 4]

c) In a shaper, if the cutting speed is 15 m/min ad the length of stroke is
300 mm, obtain the number of double strokes per minute, if the ratio of
return time to cutting time 2:3. [marks 2]

part – IV
8. a) How do you specify a size of a planer ? [marks 5]

b) Differentiate ranging from a planer and a shaper. [marks 5]

c) List out the various kinds of coolants and lubricants used during
threading, drilling, reaming and milling operations for a brass and
copper material. [marks 5]

9. a) Draw the neat sketch of a broaching tool ( internal pull broach ) and
tag its parts. [marks 6]

b) Mention the various methods of broaching. Differentiate ranging from pull
and push broaching. [marks 4]

c) Distinguish ranging from reciprocating saw and band saw. [marks 5]

10. a) How do you differentiate ranging from a jig and a fixture ? [marks 3]

b) discuss with a neat sketch channel jig [marks 6]

c) define with a neat sketch box jig. [marks 6]

Earning:   Approval pending.