纺织专业英语章节测试课后答案2024春

第二章测试

1. The reason why polyester is made by melt spinning instead of solvent spinning is that______. （ ）
A:it cannot be dissolved in any solvent B:it has a clearly defined melting temperature C:solvent spinning usually causes environment pollution D:no suitable liquor can solidify the extruded filament
答案:B
2. A polyester multifilament yarn with a resultant linear density of 150 dtex composed of 32 single filaments can be defined as _____. （ ）
A:150dtex (32) B:150dtex/32F C:32F/150dtex D:150/32dtex 3. Which of the following systems used to define the fineness of textile fibres is categorized as a weight based system? （ ）
A:Metric count B:Tex C:Denier D:Cotton count 4. In which of the following spinning systems is the twist in the yarn inserted through the reciprocating movement of a pair of rotating rollers? （ ）
A:friction B:ring C:self-twist D:rotor 5. Which of the following spinning systems does not involve roving production ? （ ）
A:ring B:air-jet C:rotor D:friction