T2V F4 C1 Safety Measures in Laboratory

Front

What equipment should be used when conducting experiments using volatile and corrosive substances? Options: Gas cylinder, Fume chamber, Round flask, Laminar flow cabinet

Back

Fume chamber

Answer explanation

A fume chamber 通风室 is essential for experiments with volatile挥发性 and corrosive腐蚀性 substances 物质as it provides a controlled environment它提供了一个受控的环境 that safely ventilates harmful vapors可以安全地通风有害蒸气, protecting the user保护用户 and minimizing exposure to hazardous materials.并最大限度地减少接触有害物质的机会。

Front

What is the function of goggles?

Back

Protect eyes from harmful chemicals

Answer explanation

Goggles 护目镜are designed to protect the eyes保护眼睛 from harmful chemicals免受有害化学物质的侵害, making this the correct choice. While they may also provide some protection from fatigue and UV rays 提供一些防止疲劳和紫外线的保护, their primary function主要功能 is to shield against chemical exposure. 是防止化学品暴露。

Front

What is the function of X in the laboratory equipment shown in Diagram 1?

Back

Rinse eyes that has come into contact with chemicals

Answer explanation

The function 功能 of X is to rinse eyes that have come into contact with chemicals冲洗接触过化学品的眼睛, providing immediate first aid to prevent serious injury提供即时急救以防止严重伤害. This is crucial in a laboratory setting where chemical exposure can occur发生化学品暴露.

Front

Which of the following substances should be handled in fume chamber? Ethanol, Distilled water, Ammonia solution, Concentrated hydrochloric acid

Back

Concentrated hydrochloric acid

Answer explanation

Concentrated hydrochloric acid 浓盐酸 releases 会释放harmful fumes有害烟雾, making it necessary to handle it in a fume chamber通风室中 for safety确保安全. Ethanol 乙醇and ammonia氨溶液 solution also have risks, but hydrochloric acid is particularly hazardous 盐酸尤其危险。

Front

Characteristic of material that can be disposed into sink? Options: Reactive materials, Has a pH value of 6, Has a pH value of 10, Organic solvent compound

Back

Has a pH value of 6

Answer explanation

Materials with a pH value of 6 (pH 值为 6 的材料) are generally neutral中性 and safe for disposal in sinks安全地丢弃在水槽中, unlike reactive materials反应性材料 or organic solvents有机溶剂, which can be hazardous很危险. A pH of 10

(pH 值为 10) indicates alkalinity表示碱度, which may also be unsuitable不合适.

Front

Which of the following waste can be thrown into the laboratory sink? Organic solvents, An acid with a pH of 2, Sodium chloride solution, Concentrated sodium hydroxide

Back

Sodium chloride solution

Answer explanation

Sodium chloride solution氯化钠溶液 is safe 安全to dispose of in the laboratory sink 可以地丢弃在实验室水槽中as it is non-toxic 无毒and does not pose environmental hazards不会对环境造成危害. In contrast, organic solvents有机溶剂, strong acids强酸, and concentrated bases浓碱 can cause harm可能会造成伤害 and should be disposed of properly应妥善处理。

Front

What is the most appropriate way to dispose of the laboratory equipment shown in Diagram 2? Options: Dispose directly into the sewage system through the laboratory sink, Carefully wrapped and stored temporarily in the freezer before disposal, Placed in a biohazard plastic bag and autoclaved, Temporarily stored in a safe place before disposal

Back

Temporarily stored in a safe place before disposal

Answer explanation

The correct choice is to temporarily store the equipment in a safe place before disposal. This ensures safety and compliance with disposal regulations, unlike direct disposal or inadequate storage methods.

Front

What should Ahmad do to dispose of the waste after conducting experiments using chicken blood? Options: Put in a special container, Wrapped and put in a biohazard plastic bag, Decontaminated by autoclave and disposed of directly in the sink, Neatly packed in biohazard plastic bags and refrigerated.

Back

Decontaminated by autoclave and disposed of directly in the sink.

Answer explanation

Ahmad should decontaminate the chicken blood using an autoclave to ensure it is safe, and then it can be disposed of directly in the sink, following proper waste disposal protocols for biological materials.

Front

In addition to fire extinguishers, what are the appropriate tools to put out the fire? Options: Air / water, Pasir / sand, Selimut kebakaran/ fire blanket, Serbuk sulfur / Sulfur powder

Back

Selimut kebakaran/ fire blanket

Answer explanation

A fire blanket is designed to smother flames and is effective for small fires, making it a suitable tool in a laboratory setting. Other options like air/water may not be safe for all types of fires, while sulfur powder is not appropriate.

Front

What types of fires can be extinguished using water-type fire extinguishers? Options: Kelas A / Class A, Kelas C / Class C, Kelas D / Class D, Kelas F / Class F

Back

Kelas A / Class A

Answer explanation

Water-type fire extinguishers are effective for Class A fires, which involve ordinary combustibles like wood, paper, and cloth. They should not be used on Class C (electrical), Class D (metal), or Class F (cooking oils) fires.