a) 110°C – 150°C
b) 150°C – 200°C
c) 200°C – 250°C
d) 250°C – 300°C
Answer: a
Explanation: Thermomechanical pulping (TMP) presteams chips between 110°C and 150°C so that they become malleable and do not fracture readily under the impact of the refiner bars. This material is highly flexible and gives good bonding and surface smoothing to the paper.
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