DVET Craft Instructor Plastic Processing Operator Model Paper
| Sr.No. | Question with options |
| 1 | What is the shape of danger warning symbol used to indicate electrical supply?
(a) Square (b) Triangle (c) Rectangle (d) Circular |
| 2 | One micrometer is equal to ______ mm.
(a) 0.01 mm (b) 0.00001 mm (c) 0.0001 mm (d) 0.001 mm |
| 3 | The measure accurately the angle of taper which is used?
(a) Protractor (b) Vernier bevel protractor (c) Bevel protractor (d) None of these |
| 4 | Shot weight of injection moulding machine is generally rated by
(a) GPPS (b) PP (c) HDPE (d) Nylons |
| 5 | Which of the marking tool is used to draw circles & arcs?
(a) Divider (b) Scriber (c) Steel rule (d) Punch |
| 6 | The point angle of drill for plastics hard rubber is _____
(a) 118 degree (b) 80 degree (c) 130 degree (d) 108 degree |
| 7 | Headless bolt is known as ______
(a) Key (b) I-bolt (c) Stud (d) Cotter |
| 8 | Semi positive mould is associated with
(a) Injection moulding (b) Blow moulding (c) None of these (d) Compression moulding |
| 9 | The function of screw in injection moulding machine
(a) Melting of polymer (b) Injecting polymer into mould (c) Mixing of polymer in barrel (d) All of these |
| 10 | Which is the most suitable file shape for filing comer and internal angles?
(a) Triangular (b) None of these (c) Flat (d) Round |
| 11 | Which of the following cannot be melted & reprocessed?
(a) PET (b) PS (c) Epoxy (d) PMMA |
| 12 | Which tool is usually used to mark the center of a hole when drilling holes?
(a) Blade (b) Hammer (c) Punch (d) Chisel |
| 13 | Is heat ______ sensitive polymer
(a) PS (b) PC (c) None of these (d) PVC |
| 14 | Which is thermoplastic has good hinge properly that makes it suitable for one piece Moulded tiffen box & compass box?
(a) PP (b) PET (c) ABS (d) PMMA |
| 15 | In compression moulding process
(a) Heat is required (b) None of these (c) Pressure is required (d) Both (a) & (b) |
| 16 | In L/D ratio of the screw the length is
(a) Total length (b) Bottoming (c) Length of feed zone (d) Flighted length |
| 17 | Which of the tap is used for finish the threads?
(a) Secondary tap (b) Taper taps (c) Intermediate tap (d) Bottoming tap |
| 18 | Thermoset material is processed by which process only?
(a) Extrusion (b) Injection molding (c) Blow moulding (d) Transfer moulding |
| 19 | Which of the material can be made into rigid & flexible products?
(a) HDPE (b) PVC (c) Nylon’s (d) PC |
| 20 | Routine maintenance of the machine like oiling greasing etc. comes under the following type of maintenance
(a) Break down (b) Preventive (c) Corrective (d) Predictive |
| Published On – 24th Aug 2022 | |
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