WBSCTE Diploma Mechanical 4thSEM Previous Year Paper 2021 on Manufacturing Process II
| Sr. No. | Questions with options |
| 1 | Stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. Overall average speed of operation is
(a) 3.75 m/min (b) 5.0 m/min (c) 7.5 m/min (d) 15 m/min |
| 2 | Quality threads can be produced by –
(a) Thread milling (b) Thread chasing (c) Thread chasing with single point tool (d) Thread casting |
| 3 | The diameter of the work surface before and after machining were100 mm and 80 mm respectively. The depth of cut was –
(a) 40 mm (b) 30 mm (c) 20 mm (d) 10 mm |
| 4 | In small lot production for machining T-slots on machine tables, it is expected to use –
(a) Shaping machine (b) Broaching machine (c) Vertical milling machine (d) Horizontal milling machine |
| 5 | For cutting double start screw threads of pitch 1.0 mm on a lathe, the tread cutting tool should have a feed rate of –
(a) 0.5 mm/rev (b) 1.0 mm/rev (c) 2.0 mm/rev (d) 4.0 mm/rev |
| 6 | Deep hole drilling of small diameter is done with EDM by selecting the tool material as –
(a) Copper wire (b) Tungsten wire (c) Brass wire (d) Tungsten carbide |
| 7 | The standard specification of a grinding wheel is A-46-M-6-V-21. It means a wheel of-
(a) Aluminium oxide of mesh size 6 (b) Boron carbinde of mesh size 46 (c) Aluminium oxide of mesh size 46 (d) Silicon carbide of mesh size 6 |
| 8 | A lead screw with half nuts in lathe, free to rotate in both directions has
(a) V-threads (b) Withworth threads (c) Buttress threads (d) ACME threads |
| 9 | Strong screw threads are produced by –
(a) Thread milling (b) Thread chasing (c) Thread cutting in single point tool (d) Thread rolling |
| 10 | Cutting speed in grinding is set to a high value to –
(a) Reduce the cutting time (b) Increase the bond strength (c) Improve cooling job and wheel (d) Reduce wheel wear |
| 11 | The flanks of teeth of rack type gear cutter used for cutting in volute gear profiles are –
(a) Cycloidal (b) Circular (c) Involute (d) Straight |
| 12 | Tool life in case of grinding wheel is the time –
(a) Between two successive regrinds of wheel (b) Taken for the wheel to be balanced (c) Taken between two successive wheel dressing (d) Taken for a wear of 1 mm on its diameter |
| 13 | The teeth of both external and internal spur gear can be cut of –
(a) Milling machine (b) Gar shaping machine (c) Gear hobbing machine (d) All of these |
| 14 | In a shaper machine, the mechanism for tool feed is –
(a) Geneva mechanism (b) With worth mechanism (c) Rachet and Pawl mechanism (d) Ward-Leonard system |
| 15 | In with worth quick return mechanism (used in shapers) the velocity of the ram is maximum at –
(a) Middle of the forward stroke (b) Beginning of return stroke (c) End of return stroke (d) Middle if the return stroke |
| 16 | Minimum dimensional and form accuracy can be obtained in the cylinder bores of automobile engines if the bores are finished by –
(a) Lapping (b) Reaming (c) Internal grinding (d) Honing |
| 17 | Abrasives are NOT used in
(a) Buffing (b) Burnishing (c) Polishing (d) Super finishing |
| 18 | The final finishing process for the surface plate made of CI which is used as reference surface is –
(a) Buffing (b) Grinding (c) Hand scraping (d) Honing |
| 19 | Internal gear cutting operation can be performed by –
(a) Milling (b) Shaping with rake cutter (c) Shaping with pinion cutter (d) Hobbing |
| 20 | In a shaping process the number of double strokes per minute is 30 and the quick return ratio is 0.6. If the length of the stroke is 250 mm, the average cutting velocity in mm/min is –
(a) 3.0 (b) 4.5 (c) 7.5 (d) 12.0 |
| 21 | Thread chasing required in cutting screw threads because –
(a) It improves surface finish (b) It is necessary to follow the thread (c) It increases the threading tool life (d) It reduces the cutting forces |
| 22 | More than one tool head can be used in which of the following machine tools?
(a) Slotter (b) Shaper (c) Planer (d) Milling machine |
| 23 | The machine tool that has the cutting stroke (removes material) when the ram moves towards the body is –
(a) Universal shaper (b) Draw cut shaper (c) Mechanical shaper (d) Vertical shaper |
| 24 | An end mill having 4 teeth is rotating at 250 rpm. If the feed per tooth is given as 0.1 mm, what is the table feed in mm/min?
(a) 100 mm/min (b) 10 mm/min (c) 250 mm/min (d) 25 mm/min |
| 25 | Which of the following material is NOT made by injection molding?
(a) Nuts (b) Tubes (c) Car handles (d) Electrical fittings |
| Data Collected By – Rashmi | |
| Published On – 27th May 2022 | |
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