| 6. | Working principle of friction spinning machine is |
| a. | aerodynamic spinning |
| b. | electronic spinning |
| c. | manual spinning |
| d. | computerized spinning |
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Answer: (a).aerodynamic spinning
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| 7. | Yarn wounds around circular packages at a rate of |
| a. | 250 - 300 m/min |
| b. | 300 - 450 m/min |
| c. | 500 - 550 m/min |
| d. | 600 - 850 m/min |
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Answer: (a).250 - 300 m/min
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| 8. | Friction spinning method allows processing of fibers with lengths of |
| a. | 5 - 100 mm |
| b. | 50 - 90 mm |
| c. | 100 - 200 mm |
| d. | 350 - 500 mm |
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Answer: (a).5 - 100 mm
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| 9. | Fibers become twisted because of friction and torque of two cylinders, rotating in |
| a. | same direction |
| b. | opposite direction |
| c. | circular direction |
| d. | upward and downward direction |
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Answer: (b).opposite direction
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| 10. | Fibers arranged co axially gives a |
| a. | layered effect |
| b. | circular effect |
| c. | continuous effect |
| d. | shaded effect |
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Answer: (a).layered effect
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