1. What is the primary chemical difference between natural and synthetic upholstery fibers? - A) Natural fibers are cellulose-based, while synthetic fibers are protein-based. - B) Natural fibers are polymer-based, while synthetic fibers are cellulose-based. - C) Natural fibers are protein-based, while synthetic fibers are polymerbased. - D) Natural fibers are carbohydrate-based, while synthetic fibers are silicate-based. Answer: C) Natural fibers are protein-based, while synthetic fibers are polymer-based. Rationale: Natural fibers, such as wool and silk, are composed of various proteins, whereas synthetic fibers, like nylon and polyester, are made of polymers derived from petrochemicals. 2. Which test can determine the heat sensitivity of a fiber? - A) Burn test - B) Chemical test - C) Solubility test - D) Abrasion resistance test Answer: A) Burn test Rationale: The burn test involves applying a flame to a fiber to observe how it reacts to heat, which helps in identifying fibers that are sensitive to high temperatures. 3. During the manufacturing process, which factor is crucial for determining the durability of the upholstery fabric? - A) The weave pattern - B) The dyeing process - C) The fiber length - D) The finishing treatments Answer: A) The weave pattern Rationale: The weave pattern of the fabric significantly affects its durability, with tighter weaves generally providing more strength and resistance to wear.