1.
Long hair in the laboratory must be ________?
Correct Answer
C. Tied back or kept entirely out of the way with a hair
band.
Explanation
Long hair in the laboratory must be tied back or kept entirely out of the way with a hair band to ensure safety and prevent any contamination or accidents. This helps to avoid hair from coming into contact with chemicals, equipment, or flames, reducing the risk of hair getting caught in machinery or causing a fire. It also helps to maintain a clean and sterile environment in the laboratory.
2.
In a laboratory, the following should not be worn.
Correct Answer
D. All the above
Explanation
In a laboratory, loose clothing, dangling jewelry, and flip-flops should not be worn. Loose clothing can easily catch fire or get entangled in equipment, posing a safety hazard. Dangling jewelry can also get caught in machinery or chemicals, causing injury. Flip-flops do not provide adequate protection for the feet and can lead to slips, trips, or chemical spills. Therefore, all of the mentioned options should not be worn in a laboratory to ensure the safety of the individuals working there.
3.
Horseplay or fooling around in the laboratory are ____?
Correct Answer
A. Always against the rules.
Explanation
Horseplay or fooling around in the laboratory is always against the rules because it can lead to accidents, injuries, and damage to equipment or experiments. Such behavior can compromise the safety of everyone in the lab and disrupt the scientific work being conducted. Therefore, it is important to maintain a serious and focused environment in the laboratory to ensure the well-being of individuals and the integrity of the experiments.
4.
If you want to smell and unknown substance, you should ______.
Correct Answer
C. Waft.
Explanation
When you want to smell an unknown substance, you should waft it. Wafting involves gently waving or moving the substance towards your nose, allowing the scent to reach your olfactory receptors without overpowering them. This method helps prevent any strong or potentially harmful smells from directly entering your nose. It is a safer and more controlled way to assess the odor of an unknown substance.
5.
Which of the following shoes would be ok to wear in a lab?
Correct Answer
A. Tennis shoes.
Explanation
Tennis shoes would be okay to wear in a lab because they provide protection and support for the feet. They have a closed design that covers the entire foot, reducing the risk of injury from spills, chemicals, or falling objects. Additionally, the rubber soles of tennis shoes provide traction, preventing slips and falls on potentially slippery laboratory floors. Sandals, house shoes, and bare feet are not suitable for lab environments as they do not offer adequate protection or stability.
6.
Why are goggles worn in a lab?
Correct Answer
B. To protect your eyes
Explanation
Goggles are worn in a lab to protect the eyes from potential hazards such as chemicals, flying debris, or splashes. They act as a barrier, preventing any harmful substances or objects from coming into direct contact with the eyes. This helps to minimize the risk of eye injuries and maintain the safety of the individual working in the laboratory environment.
7.
If you don't understand a part of the laboratory experiment, you should _____.
Correct Answer
C. Ask the teacher before starting.
Explanation
If you don't understand a part of the laboratory experiment, it is advisable to ask the teacher before starting. This is because the teacher is the best resource to clarify any doubts or confusion regarding the experiment. Asking the teacher beforehand ensures that you have a clear understanding of the experiment's procedures, objectives, and safety measures. It also helps in preventing any potential mistakes or accidents that may occur due to misunderstanding or lack of knowledge.
8.
What is this piece of lab safety equipment used for?
Correct Answer
B. To put out fire.
Explanation
This piece of lab safety equipment is used to put out fire. It is commonly known as a fire extinguisher and is designed to release a substance that can suppress and extinguish flames. It is an essential tool in laboratories and other environments where fire hazards are present, as it helps to prevent the spread of fire and protect people and property from harm.
9.
These 2 girls are working in the lab. What are they not wearing that they should be wearing?
Correct Answer
D. Gloves
Explanation
The correct answer is gloves because when working in a lab, it is important to wear gloves to protect the hands from potential chemical or biological hazards. Gloves provide a barrier between the skin and any harmful substances that may be present, preventing direct contact and reducing the risk of contamination or injury.