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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER – IV-EXAMINATION – WINTER 2015
Subject Code: 3341901 Date: 15/12/2015
Subject Name: Manufacturing Engineering-ll
Time: 02:30 PM TO 5:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make Suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
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Q.1 Answer any seven out of ten. 14
1. Define Machining process.
2. Name various cutting tool material.
3. List various types of drill.
4. Explain the term cutting speed and feed with reference to drilling machine.
5. Why cutting fluids are used ?
6. State main functions of a quick return mechanism.
7. List slotting machine operations.
8. Explain longitudinal feed and cross feed with reference to lathe.
9. List various parts of a tool head of shaper machine.
10. Why chucks are used?
Q.2 (a) What are the properties of good cutting tool material? Discuss. 03
OR
(a) State the advantages and disadvantages of discontinuous chip. 03
(b) Draw a neat sketch of single point cutting tool and show various angles. 03
OR
(b) Differentiate oblique cutting and orthogonal cutting. 03
(c) Explain 1. Face plate 2. Angle plate 04
OR
(c) Explain knurling and chamfering operations. 04
(d) Describe four jaw chuck with neat sketch. 04
OR
(d) List methods of obtaining various lathe spindle speeds. Explain any one. 04
Q.3 (a) List and describe in brief the main parts of a slotting machine. 03
OR
(a) Differentiate between planer and shaper. 03
(b) Draw a block diagram of shaper machine and label its main parts. 03
OR
(b) Give specifications of a shaping machine. 03
(c) List drilling machine operations. Explain reaming operation. 04
OR
(c) Explain working of a sensitive drilling machine with neat sketch. 04
(d) Write short note on Sleeve and socket. 04
OR
(d) State the specification of drilling machine. 04
Q.4 (a) Name different methods of indexing. Explain direct indexing. 03
OR
(a) Give classification of milling cutters. 03
(b) Explain up milling and down milling. 04
OR
(b) Explain with neat sketch 1. Face milling 2 End milling. 04
(c) Explain with neat sketch Hydraulic quick return mechanism. 07
Q.5 (a) Differentiate between capstan and turret lathe. 04
(b) Write short note on Back gear mechanism of lathe 04
(c) Draw a block diagram of knee type milling machine and label its main parts. 03
(d) Write short note on tool wear. 03
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