Instruments & Regulatory第 82 / 100 题
The FDA drop-ball test for impact resistance drops what onto the lens?
a.A rubber mallet
b.A metal rod
c.A hammer
d.A 5/8-inch steel ball from 50 inches
解析
The drop-ball test drops a 5/8-inch (15.9 mm) steel ball weighing about 16 grams from a height of 50 inches onto the lens; the lens must not fracture to demonstrate impact resistance.
法律依据: FDA impact resistance免费刷完整 100 道题库 — 无需注册。
同考点相关题目
- A lensmeter (focimeter) is used to measure what?
- A pupillometer is designed to measure what?
- Under FDA regulations, all dress eyewear lenses sold in the United States must be what?
- ANSI Z80.1 is the American National Standard that specifies what?
- Occupational and safety eyewear in the U.S. is governed by which standard?
- Safety frames and lenses that meet the high-impact standard are marked with what?