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Listening Quiz: Đánh Giá Khả Năng Phân Hủy Sinh Học Của Chất Hoạt Động Bề Mặt Mới – Advanced Level
Th3 4, 2024
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bởi
Anna Phạm
trong
Tiếng Anh Hóa Học (English for Chemistry)
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1.
Which test does Daniel say is required first for the new surfactant?
A toxicity test on microbes
An inherent biodegradability test
A ready biodegradability test
A concentration stability test
Explanation:
Daniel says, “First, a ready biodegradability test is required.”
2.
According to Daniel, which OECD test series is used for the ready biodegradability test?
OECD 201 series
OECD 301 series
OECD 501 series
OECD 401 series
Explanation:
Emma asks if it is the OECD 301 series test, and Daniel confirms, “Exactly.”
3.
What does Daniel say happens if the surfactant fails the ready biodegradability test?
They increase the surfactant concentration
They perform an inherent biodegradability test
The project is canceled immediately
They switch to measuring only oxygen
Explanation:
Daniel says, “Then we do an inherent biodegradability test.”
4.
How long does Daniel say the ready biodegradability test usually takes?
More than 60 days
About 28 days
14 days
7 days
Explanation:
Daniel states, “Ready tests take about 28 days.”
5.
Why do they use low concentrations when testing the surfactant?
To make the surfactant break down faster
To avoid toxicity to microbes
To replace the need for CO2 measurement
To meet the OECD 301 series requirement
Explanation:
Daniel says they use low concentrations “to avoid toxicity to microbes,” so that is the reason.
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Tiếng Anh Khách Sạn: Thuyết Trình Kế Hoạch Cải Thiện Chất Lượng Thực Phẩm – Easy Level
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