1.
When you finish working with chemicals, biological specimens, and other lab substances, always ________
Correct Answer
B. Wash your hands thoroughly with soap and water.
Explanation
After working with chemicals, biological specimens, and other lab substances, it is important to wash your hands thoroughly with soap and water. This is because washing with soap and water helps to remove any contaminants or residues that may be present on your hands. It is not recommended to treat your hands with skin lotion as it does not effectively remove these substances. Wiping your hands on a towel or your clothes may also not be sufficient to remove all the contaminants. Therefore, the best option is to wash your hands thoroughly with soap and water.
2.
Flammable materials, like alcohol, should never be dispensed or used near
Correct Answer
B. An open flame.
Explanation
Flammable materials, such as alcohol, can easily catch fire when exposed to an open flame. This is because an open flame provides the necessary heat and ignition source to cause the flammable material to ignite and burn. Therefore, it is important to never dispense or use flammable materials near an open flame to prevent the risk of fire and potential harm to individuals or property.
3.
Flinn Safety guidelines provide comprehensive safety procedures for science labs to ensure the safety of students and staff.
Correct Answer
A. True
Explanation
Flinn Scientific is known for providing detailed safety guidelines, procedures, and equipment recommendations to ensure safe practices in science laboratories, particularly in educational settings. These guidelines cover various aspects such as chemical handling, emergency preparedness, and personal protective equipment (PPE). By following Flinn Safety guidelines, labs can minimize risks and create a safer environment for everyone involved.
4.
If a laboratory fire erupts, immediately ____________.
Correct Answer
A. Notify your instructor.
Explanation
In the event of a laboratory fire, it is important to immediately notify your instructor. They are responsible for ensuring the safety of everyone in the lab and will be able to take appropriate action to control the fire and evacuate the area if necessary. Running for the fire extinguisher or throwing water on the fire may not be the safest or most effective response, as it depends on the type and size of the fire. Opening the windows could potentially worsen the fire by providing it with more oxygen. Therefore, the best course of action is to inform the instructor who can then take the necessary steps to handle the situation.
5.
Approved eye protection devices (such as goggles) are worn in the laboratory when __________.
Correct Answer
D. Any time chemicals, heat or glassware are used.
Explanation
Approved eye protection devices such as goggles are worn in the laboratory to protect the eyes from potential hazards such as chemicals, heat, or glassware. These devices create a physical barrier between the eyes and any potential dangers, reducing the risk of eye injuries. Wearing them only when chemicals, heat, or glassware are used ensures that the eyes are protected during activities that may pose a higher risk.
6.
Work areas should be kept clean and tidy.
Correct Answer
A. True
Explanation
Keeping work areas clean and tidy is important for several reasons. Firstly, a clean and organized workspace promotes productivity and efficiency. It allows for easy access to tools, materials, and information, saving time and reducing distractions. Secondly, a clean work environment ensures the safety of employees by minimizing hazards and reducing the risk of accidents. It also promotes good hygiene and prevents the spread of germs and diseases. Additionally, a tidy workspace reflects professionalism and attention to detail, which can positively impact the perception of clients and colleagues. Overall, maintaining a clean and tidy work area is essential for productivity, safety, and professionalism.
7.
You have been injured in the laboratory (cut, burn, etc.). First, you should
Correct Answer
C. Tell the science instructor at once.
Explanation
In case of an injury in the laboratory, it is important to inform the science instructor immediately. The science instructor is responsible for the safety of the students in the laboratory and will be able to provide appropriate guidance and assistance. They may also have access to first aid supplies or be able to contact a nurse or doctor if necessary. It is crucial to prioritize informing the instructor to ensure proper care and attention for the injury.
8.
Never remove chemicals or other equipment from the laboratory.
Correct Answer
A. True
Explanation
Removing chemicals or equipment from the laboratory can be dangerous and against safety protocols. It can lead to accidents, spills, or contamination. Leaving chemicals and equipment in the designated laboratory area ensures that they are properly stored and handled, reducing the risk of accidents and maintaining a safe working environment.
9.
If you wear contact lenses in the school laboratory,
Correct Answer
C. Advise your science instructor that you wear contact lenses.
Explanation
The correct answer is to advise your science instructor that you wear contact lenses. This is important because wearing contact lenses in a school laboratory can pose a risk to your eyes if any chemicals or substances come into contact with them. By informing your science instructor, they can provide you with appropriate safety measures or alternatives to ensure your eyes are protected during the lab activities.
10.
Chipped or cracked glassware is ok to use.
Correct Answer
B. False
Explanation
Chipped or cracked glassware is not safe to use because it can break further during use, potentially causing injury. Additionally, cracks or chips in glassware can create spaces where bacteria can grow, making it unsanitary for use. It is recommended to discard chipped or cracked glassware and replace it with new, undamaged items.
11.
We should always read all procedures thoroughly before entering the laboratory.
Correct Answer
A. True
Explanation
It is important to read all procedures thoroughly before entering the laboratory to ensure safety and accuracy. By familiarizing ourselves with the procedures, we can understand the potential hazards, necessary precautions, and proper techniques required for the experiment. This helps in preventing accidents, minimizing errors, and ensuring the success of the experiment. Therefore, it is advisable to always read all procedures thoroughly before entering the laboratory.
12.
If you do not understand a direction or part of a lab procedure, you should...
Correct Answer
C. Ask the instructor before proceeding.
Explanation
When faced with a direction or part of a lab procedure that is unclear, it is important to ask the instructor before proceeding. This is because attempting to figure it out as you do the lab or trying several methods until something works can lead to mistakes or incorrect results. Skipping it and going on to the next part may also disrupt the flow of the experiment and potentially compromise the overall outcome. Therefore, seeking clarification from the instructor ensures that you have a clear understanding of the procedure and can proceed with accuracy and confidence.
13.
When gathering glassware and equipment for an experiment, you should...
Correct Answer
D. All of the above.
Explanation
The correct answer is "all of the above." When gathering glassware and equipment for an experiment, it is important to read all directions carefully to know what equipment is necessary. Additionally, one should examine all glassware to check for chips or cracks, as damaged glassware can affect the experiment's results. Lastly, any glassware that appears dirty should be cleaned to ensure accurate measurements and avoid contamination. Therefore, all of these steps should be followed when gathering glassware and equipment for an experiment.
14.
If a lab experiment is not completed, you should...
Correct Answer
A. Discuss the issue with your instructor.
Explanation
If a lab experiment is not completed, it is important to discuss the issue with your instructor. This is because the instructor can provide guidance on how to proceed, offer alternative solutions, or reschedule the experiment if necessary. Sneaking in after school and working alone is not recommended as it may violate safety protocols and lab rules. Coming in during lunch and finishing while eating may compromise the accuracy and quality of the experiment. Making up results is dishonest and unethical. Therefore, discussing the issue with the instructor is the appropriate course of action.
15.
All unauthorized experiments are prohibited.
Correct Answer
A. True
Explanation
The statement clearly states that all unauthorized experiments are prohibited. This means that any experiment that is not authorized is not allowed. Therefore, the correct answer is true, indicating that all unauthorized experiments are indeed prohibited.
16.
After completing an experiment, all chemical wastes should be ________.
Correct Answer
B. Disposed of according to your instructor's directions.
Explanation
After completing an experiment, it is important to dispose of all chemical wastes properly to ensure safety and environmental protection. Leaving them at the lab station for the next class could pose a risk to others. Dumping them in the sink is not recommended as it may contaminate the water supply. Taking them home is also not a suitable option as it may lead to improper disposal. The correct approach is to follow the instructions given by the instructor, as they are knowledgeable about the appropriate methods of disposal.
17.
You are allowed to enter the chemical preparation/storage area any time you need to get an item.
Correct Answer
B. False
Explanation
The statement is false because access to the chemical preparation/storage area is typically restricted and controlled to ensure safety. Unauthorized entry can pose risks such as exposure to hazardous substances or accidents. Therefore, one cannot enter the area anytime they need to get an item; instead, they must follow proper protocols and obtain permission or supervision to access the area.
18.
It's ok to pick up broken glass with your bare hands as long as the glass is placed in the trash.
Correct Answer
B. False
Explanation
Picking up broken glass with bare hands can be extremely dangerous as it can cause cuts, lacerations, and infections. Even if the glass is placed in the trash, it is still advisable to use protective gloves or tools to handle broken glass to prevent any potential harm. Therefore, the statement is false.
19.
Personal eyeglasses provide as much protection as...
Correct Answer
D. None of the above.
Explanation
The correct answer is "none of the above" because personal eyeglasses do not provide the same level of protection as a face shield, safety glasses, or splashproof chemical goggles. Personal eyeglasses are designed to correct vision and may not have the necessary features to protect the eyes from hazards such as impact, chemicals, or splashes. It is important to use appropriate protective eyewear for specific tasks or environments to ensure adequate eye protection.
20.
Never leave a lit burner unattended.
Correct Answer
A. True
Explanation
Leaving a lit burner unattended can be extremely dangerous as it can lead to accidents such as fire outbreaks, burns, or even explosions. Unattended burners can cause items to catch fire or boil over, resulting in a potential hazard. It is important to always stay vigilant and monitor any open flames to ensure safety in the kitchen or any other environment where burners are used.
21.
Long hair in the laboratory must be ___________.
Correct Answer
D. Tied back or kept entirely out of the way with a hair band, hairpins, or other confining device.
Explanation
Long hair in the laboratory must be tied back or kept entirely out of the way with a hair band, hairpins, or other confining device to ensure that it does not come into contact with any chemicals, equipment, or open flames. This is important for the safety of the individual and to prevent any contamination or accidents that may occur due to loose hair. Additionally, keeping hair tied back or confined helps maintain a clean and hygienic working environment in the laboratory.
22.
In a laboratory, the following should not be worn:
Correct Answer
D. All of the above
Explanation
Loose clothing, dangling jewelry, and sandals should not be worn in a laboratory. Loose clothing can easily catch fire or get caught in equipment, posing a safety hazard. Dangling jewelry can also get caught in equipment or chemicals, causing injury. Sandals do not provide adequate protection for the feet and can result in injury from spills or falling objects. Therefore, all of the above options should not be worn in a laboratory to ensure safety.
23.
The following footwear is best in the laboratory:
Correct Answer
C. Closed-toed shoes
Explanation
Closed-toed shoes are the best footwear option in a laboratory because they provide protection and safety. In a laboratory setting, there may be hazardous materials or equipment that can cause injury or accidents. Closed-toed shoes offer more coverage and can prevent any spills, chemicals, or sharp objects from coming into direct contact with the feet. They also provide stability and support, reducing the risk of slips, trips, or falls. Therefore, closed-toed shoes are the recommended choice to ensure the well-being and safety of individuals working in a laboratory environment.
24.
Horseplay or practical jokes in the laboratory are...
Correct Answer
A. Always against the rules.
Explanation
Horseplay or practical jokes in the laboratory are always against the rules because they can pose serious risks to the safety and well-being of individuals in the lab. Laboratories often deal with hazardous materials and delicate equipment, and engaging in horseplay can lead to accidents, injuries, or damage to equipment. It is crucial to maintain a safe and focused environment in the lab to prevent any potential harm or disruptions to the scientific work being conducted.
25.
If a piece of equipment is not working properly, stop, turn it off, and tell...
Correct Answer
D. The science instructor.
Explanation
When a piece of equipment is not working properly, it is important to follow safety protocols. The science instructor is the most appropriate person to inform because they have the knowledge and experience to handle the situation. They can assess the problem, determine if it can be fixed or if a replacement is needed, and ensure the safety of everyone in the lab. The custodian may not have the expertise to address equipment issues, while lab partners and friends may not have the authority or knowledge to handle the situation effectively.
26.
If acid is splashed on your skin, wash it at once with
Correct Answer
D. Plenty of water.
Explanation
When acid is splashed on the skin, it is important to wash it off immediately with plenty of water. Acid is corrosive and can cause burns and damage to the skin. Water helps to dilute the acid and flush it away, reducing the risk of further harm. Soap or oil may not be effective in neutralizing the acid and could potentially worsen the situation. Using a weak base may be an option for neutralizing the acid, but it is not mentioned in the given choices.