MCQOPTIONS
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MCQOPTIONS
This section includes 65 Mcqs, each offering curated multiple-choice questions to sharpen your Textile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Shorter fibers are not nipped by feeder cylinder and floats freely. This is cause of |
| A. | drafting |
| B. | defective drafting |
| C. | high speed drafting |
| D. | low speed drafting |
| Answer» C. high speed drafting | |
| 2. |
Yarn runs through flame at a rate of |
| A. | 400 to 1000 m/min |
| B. | 500 to 1000 m/min |
| C. | 500 to 1000 m/min |
| D. | 1500 to 2500 m/min |
| Answer» B. 500 to 1000 m/min | |
| 3. |
Formula for calculating total draft to which roving is submitted is |
| A. | Stotal = SC = SA x SB |
| B. | Stotal = SC = SP x SA |
| C. | Stotal = SC = SP x SB |
| D. | Stotal = SC = SB x SP |
| Answer» B. Stotal = SC = SP x SA | |
| 4. |
In second and third stage, chemical used is |
| A. | sodium |
| B. | solvay sodium carbonate |
| C. | sodium acetate |
| D. | sodium chloride |
| Answer» C. sodium acetate | |
| 5. |
First vat in scouring process is uses for |
| A. | eliminating earth particles |
| B. | scouring the wool |
| C. | rinsing the clean wool |
| D. | all of above |
| Answer» B. scouring the wool | |
| 6. |
Efficiency of surface agent and sodium carbonate can be determined by checking |
| A. | foam |
| B. | dispersion of particles |
| C. | stability of the emulsion |
| D. | required absorption |
| Answer» B. dispersion of particles | |
| 7. |
At bottom of each scouring vat there is an open flow drain valve with |
| A. | manual time control |
| B. | automatic time control |
| C. | automatic valve control |
| D. | manual valve control |
| Answer» C. automatic valve control | |
| 8. |
Speed of worm conveyor is set according to the |
| A. | type of the wool |
| B. | quantity of dirt to be removed |
| C. | both a and b |
| D. | structure of wool |
| Answer» D. structure of wool | |
| 9. |
Main purpose of scouring is to remove |
| A. | wax |
| B. | suint |
| C. | waste |
| D. | all of above |
| Answer» E. | |
| 10. |
In middle of scouring vats there is a perforated grid that ensure no passing of |
| A. | liquor |
| B. | wool |
| C. | dirt |
| D. | moisture |
| Answer» D. moisture | |
| 11. |
Excessive temperature in pre scouring stage can lead to |
| A. | felting |
| B. | entanglements |
| C. | felting and entanglements |
| D. | felting and deforming |
| Answer» D. felting and deforming | |
| 12. |
Draft made up of rotating organ, through which roving runs inserted in draft range close to cylinder is called as |
| A. | false twist draft |
| B. | false draft |
| C. | twist draft |
| D. | rotating organ draft |
| Answer» B. false draft | |
| 13. |
In scouring process, extremely low temperature |
| A. | improves efficiency |
| B. | hinders scouring |
| C. | improves cleaning |
| D. | hinders felting |
| Answer» C. improves cleaning | |
| 14. |
Speed of worm conveyor is |
| A. | fixed |
| B. | slow |
| C. | fast |
| D. | variable |
| Answer» E. | |
| 15. |
Fourth and fifth vats in scouring process is uses for |
| A. | rinsing the clean wool |
| B. | scouring the wool |
| C. | eliminating earth particles |
| D. | all of above |
| Answer» B. scouring the wool | |
| 16. |
Temperature required for fast formation of small spheres of yolk is |
| A. | 60 degrees |
| B. | 50 degrees |
| C. | 40 degrees |
| D. | 30 degrees |
| Answer» B. 50 degrees | |
| 17. |
For reduction of larger lumps, material in bales is |
| A. | separated |
| B. | plucked |
| C. | packed tightly |
| D. | pressed |
| Answer» C. packed tightly | |
| 18. |
In short fiber drafting, rovings are |
| A. | weak |
| B. | strong |
| C. | cohesive |
| D. | elastic |
| Answer» B. strong | |
| 19. |
Singeing is used to eliminate |
| A. | smoothness |
| B. | hairiness |
| C. | rigidity |
| D. | tightness |
| Answer» C. rigidity | |
| 20. |
Number of scouring vats used in scouring of greasy wool is/are |
| A. | 4 or 5 |
| B. | 5 or 6 |
| C. | 7 or 8 |
| D. | 9 or 10 |
| Answer» B. 5 or 6 | |
| 21. |
After scouring, residual grease must not be greater than |
| A. | 0.01 |
| B. | 0.02 |
| C. | 0.03 |
| D. | 0.04 |
| Answer» B. 0.02 | |
| 22. |
At end of scouring vat there is squeezing press whose upper cylinder is made up of |
| A. | chromium plating |
| B. | nylon or rubber rope |
| C. | nylon |
| D. | rubber |
| Answer» C. nylon | |
| 23. |
In order to get even singeing, machine must maintain |
| A. | constant speed |
| B. | even flame |
| C. | both a and b |
| D. | hairiness |
| Answer» D. hairiness | |
| 24. |
In upper section of each scouring unit there is a mobile apron, with teeth and blades having a |
| A. | circular motion |
| B. | oscillating motion |
| C. | reciprocating motion |
| D. | random motion |
| Answer» D. random motion | |
| 25. |
In short fiber drafting, drafting rate is between |
| A. | 10 to 20 % |
| B. | 20 to 50 % |
| C. | 50 to 70 % |
| D. | 75 to 90 % |
| Answer» C. 50 to 70 % | |
| 26. |
Singeing system has |
| A. | fly fiber evacuation system |
| B. | flame temperature control system |
| C. | normal machine control devices |
| D. | all of above |
| Answer» E. | |
| 27. |
Squeezing press exerts pressure on wool equal to |
| A. | 10,000 daN |
| B. | 12,000 daN |
| C. | 15,000 daN |
| D. | 20,000 daN |
| Answer» D. 20,000 daN | |
| 28. |
In scouring stage, stirring is important for efficient removal of |
| A. | dust |
| B. | moisture |
| C. | water |
| D. | particles |
| Answer» B. moisture | |
| 29. |
Second and third vats in scouring process is uses for |
| A. | scouring the wool |
| B. | eliminating earth particles |
| C. | rinsing the clean wool |
| D. | all of above |
| Answer» B. eliminating earth particles | |
| 30. |
Shorter fibers are generally not nipped by feeder cylinders resulting in |
| A. | fiber opening |
| B. | fiber waste |
| C. | free fibers |
| D. | floating fibers |
| Answer» E. | |
| 31. |
In pre scouring stage, efficiency depends on |
| A. | liquor state |
| B. | liquor temperature |
| C. | liquor density |
| D. | liquor impurity |
| Answer» C. liquor density | |
| 32. |
Excessive water in greasy wool hinders |
| A. | dust removal |
| B. | proper processing |
| C. | twisting |
| D. | spinning |
| Answer» C. twisting | |
| 33. |
Three scouring stages must be performed at a temperature that liquefies yolk allowing |
| A. | emulsification |
| B. | liquidation |
| C. | condensation |
| D. | scouring |
| Answer» B. liquidation | |
| 34. |
In singeing, yarn is passed through flame which |
| A. | smoothness |
| B. | hairiness |
| C. | strength |
| D. | tightness |
| Answer» C. strength | |
| 35. |
Settling trughs have capacity which is |
| A. | different from scouring vat |
| B. | same as scouring vat |
| C. | 10% less than scouring vat |
| D. | 40% less than scouring vat |
| Answer» C. 10% less than scouring vat | |
| 36. |
Dirt adhered to wool absorbs water and swells, reaching diameter |
| A. | slightly bigger than the fiber |
| B. | 2/3 times bigger than the fiber |
| C. | three four times bigger than the fiber |
| D. | five times bigger than the fiber |
| Answer» D. five times bigger than the fiber | |
| 37. |
Rough blending of fibers is done in |
| A. | special blending boxes |
| B. | blending kits |
| C. | mixing boxes |
| D. | blending machine |
| Answer» B. blending kits | |
| 38. |
In pre scouring stage quantity of surfactants and alkali as compared to other vats is |
| A. | more |
| B. | less |
| C. | same |
| D. | varies accordingly |
| Answer» C. same | |
| 39. |
Diving drum prevents wool from |
| A. | dipping in liquor |
| B. | floating on liquor |
| C. | sucking in liquor |
| D. | cleaning liquor |
| Answer» C. sucking in liquor | |
| 40. |
Shape of bottom of first two vats in scouring is |
| A. | pyramid |
| B. | truncated pyramid |
| C. | round |
| D. | vessel like |
| Answer» C. round | |
| 41. |
In fourth and fifth scouring stage, temperature is decreased to |
| A. | 45 degrees |
| B. | 55 degrees |
| C. | 45 and 55 degrees |
| D. | 32 degrees |
| Answer» D. 32 degrees | |
| 42. |
In short fiber drafting, drafting is controlled by |
| A. | control panel |
| B. | drafting control devices |
| C. | fiber control devices |
| D. | short fiber control devices |
| Answer» D. short fiber control devices | |
| 43. |
Greasy wool is scoured to get rid of |
| A. | yolk |
| B. | suint |
| C. | both a and b |
| D. | dust |
| Answer» D. dust | |
| 44. |
Correct quantity of surfactant to be used in scouring process is determined by |
| A. | required absorption |
| B. | stability of the emulsion |
| C. | dispersion of particles |
| D. | all of above |
| Answer» E. | |
| 45. |
Dirt can be removed with help of |
| A. | correct stirring |
| B. | agitation of liquor |
| C. | suitable speed of the press rollers |
| D. | all of above |
| Answer» E. | |
| 46. |
In pre scouring stage, liquor temperature is |
| A. | approx. 25 degrees |
| B. | approx. 28 degrees |
| C. | approx. 35 degrees |
| D. | approx. 42 degrees |
| Answer» D. approx. 42 degrees | |
| 47. |
Singeing machine consists of |
| A. | package to package winder |
| B. | gas burner |
| C. | both a and b |
| D. | singeing burner |
| Answer» D. singeing burner | |
| 48. |
Stirring in scouring stage may lead to |
| A. | felting |
| B. | entanglements |
| C. | twisting |
| D. | felting and entanglements |
| Answer» E. | |
| 49. |
In second stage, greasy substances are recovered by |
| A. | heating the bath to 90 degrees |
| B. | subsequent centrifugation |
| C. | subsequent centrifugation and centripetation |
| D. | heating the bath to 90 degrees and subsequent centrifugation |
| Answer» E. | |
| 50. |
Change in weight of yarn causes change in |
| A. | yarn count |
| B. | yarn thickness |
| C. | yarn strength |
| D. | yarn hairiness |
| Answer» B. yarn thickness | |