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1. A plastic that can be melted, formed and cooled a repeated number of times is referred to as being:-
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2. The most suitable selection of plastic material from which to manufacture a supermarket carrier bag would be:-
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3. To eliminate the issue of film sticking to itself in the nip rollers, plastics materials often contain:-
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4. After processing a number of times, the MFR (MFI) value of most thermoplastic materials will:-
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5. SPC is used to:-
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6. What can be checked when using a micrometer:-
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7. Production that does not meet the laid down quality specification is referred to as being:-
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8. Which of the following is a function performed by a thermocouple:-
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9. The primary function of the breaker plate is to:-
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10. A plastics material described as being ‘hygroscopic’ usually requires:-
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11. During the blown film process, what affects the rate at which heat is taken away from the material:-
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13. For an LDPE film, the final gloss can be improved by increasing the temperature of the:-
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12. Which of the following machine parameters could be altered to improve film impact strength:-
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14. A wider die gap is most suited to:-
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15. The thickness of a film is affected primarily by the size of the:-
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16. To increase both the thickness and the diameter of a film it would be necessary to change the:-
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17. An emergency stop button, if operated, must:-
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18. If during production, the die becomes partially or completely blocked, the correct course of action would be to:-
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19. What does S.W.L. stand for:-
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20. Compressed air should be used to clear away granules of material from around the machine:-
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