The Lab Safety Quiz Exam!

1. If you do not understand a direction or part of a lab procedure, you should

Figure it out as you do the lab

Try several methods until something works

Ask the instructor before proceeding

Skip it and go on to the next part

When faced with a direction or part of a lab procedure that is unclear or not understood, it is important to ask the instructor before proceeding. This ensures that any confusion or misunderstanding is clarified before continuing with the lab. It is the safest and most responsible approach to take, as it helps to prevent any potential mistakes or accidents that could occur from not fully understanding the instructions.

Explanation

When faced with a direction or part of a lab procedure that is unclear or not understood, it is important to ask the instructor before proceeding. This ensures that any confusion or misunderstanding is clarified before continuing with the lab. It is the safest and most responsible approach to take, as it helps to prevent any potential mistakes or accidents that could occur from not fully understanding the instructions.

2. In a laboratory, the following should not be worn:

Loose clothing.

Dangling jewellery.

Sandals

All of the above

All of the above should not be worn in a laboratory because loose clothing can easily catch fire or get caught in equipment, dangling jewellery can get caught in equipment or chemicals, and sandals do not provide adequate foot protection and can lead to injuries from spills or falling objects.

Explanation

All of the above should not be worn in a laboratory because loose clothing can easily catch fire or get caught in equipment, dangling jewellery can get caught in equipment or chemicals, and sandals do not provide adequate foot protection and can lead to injuries from spills or falling objects.

3. When is it okay to "horseplay" in the laboratory?

Before the lab starts, it is okay to play with the materials

When our groups is done with the lab, we can play around

Horseplay is fun, we should do it the whole time

Horseplay can be dangerous and distracting and should never be done in class

Horseplay or playing around in class should never be done. It is disrespectful to yourself, your fellow classmates, and your teacher. It can also be dangerous and distracting.

Explanation

Horseplay or playing around in class should never be done. It is disrespectful to yourself, your fellow classmates, and your teacher. It can also be dangerous and distracting.

4. When working with a group, what job should I perform?

All of them, you can't trust the rest of the group to do anything

Nothing, let everyone else do the work

The task that I am assigned, everyone should do their fair share and work together

Whatever job I want to do, it's more fun that way

Working in groups can be difficult. Some people want to take charge and others want to let the rest of the group do all the work. By performing your task, you ensure that you are doing your part and each person is contributing.

Explanation

Working in groups can be difficult. Some people want to take charge and others want to let the rest of the group do all the work. By performing your task, you ensure that you are doing your part and each person is contributing.

5. If a piece of equipment is not working properly, stop, turn it off, and tell

The custodian

Your lab partner

Your best friend in the class

The science instructor

In case a piece of equipment is not functioning correctly, it is important to take immediate action. The best course of action would be to stop using the equipment to prevent any further damage or potential harm. Turning it off is also necessary to ensure safety. Finally, informing the science instructor is crucial as they are responsible for supervising the laboratory and have the knowledge and authority to address the issue appropriately.

Explanation

In case a piece of equipment is not functioning correctly, it is important to take immediate action. The best course of action would be to stop using the equipment to prevent any further damage or potential harm. Turning it off is also necessary to ensure safety. Finally, informing the science instructor is crucial as they are responsible for supervising the laboratory and have the knowledge and authority to address the issue appropriately.

6. When should you wear your safety apron or lab coat?

When you feel like it

When instructed by the teacher

Only when working with dangerous chemicals

Never, it's of no use

Lab coats and aprons are used to protect the clothing during different kinds of labs. Part of lab safety is following directions, listening to your teacher, and following his/her directions is always the safest thing to do.

Explanation

Lab coats and aprons are used to protect the clothing during different kinds of labs. Part of lab safety is following directions, listening to your teacher, and following his/her directions is always the safest thing to do.

7. If a laboratory fire erupts, immediately:

Notify your instructor

Run for the fire extinguisher

Throw water on the fire

Open the windows

In the event of a laboratory fire, it is crucial to immediately notify your instructor. This is because the instructor is responsible for ensuring the safety of everyone in the laboratory and will be able to take appropriate action to control the situation. Running for the fire extinguisher may be necessary later on, but notifying the instructor should be the first step to ensure the safety of all individuals present. Throwing water on the fire may not be effective, as it could potentially spread the fire or cause other hazards. Opening the windows may help to ventilate the area, but it should not be the immediate response to a fire.

Explanation

In the event of a laboratory fire, it is crucial to immediately notify your instructor. This is because the instructor is responsible for ensuring the safety of everyone in the laboratory and will be able to take appropriate action to control the situation. Running for the fire extinguisher may be necessary later on, but notifying the instructor should be the first step to ensure the safety of all individuals present. Throwing water on the fire may not be effective, as it could potentially spread the fire or cause other hazards. Opening the windows may help to ventilate the area, but it should not be the immediate response to a fire.

8. Approved eye protection devices (such as goggles) are worn in the laboratory

To avoid eye strain

To improve your vision

Only if you don’t have corrective glasses

Any time chemicals, heat or glassware are used

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 are designed to create a barrier between the eyes and any harmful substances or objects that may cause injury or damage to the eyes. Therefore, they should be worn whenever there is a risk of exposure to chemicals, heat, or glassware in the laboratory.

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 are designed to create a barrier between the eyes and any harmful substances or objects that may cause injury or damage to the eyes. Therefore, they should be worn whenever there is a risk of exposure to chemicals, heat, or glassware in the laboratory.

9. Flammable materials, like alcohol, should never be dispensed or used near:

An open door

An open flame

Another student

A sink

Flammable materials, like alcohol, should never be dispensed or used near an open flame because they have a low flash point and can easily catch fire or explode when exposed to a source of ignition. The heat from an open flame can ignite the flammable vapors or liquid, leading to a dangerous fire hazard. It is important to ensure that flammable materials are stored and used in a safe environment away from any potential sources of ignition to prevent accidents and injuries.

Explanation

Flammable materials, like alcohol, should never be dispensed or used near an open flame because they have a low flash point and can easily catch fire or explode when exposed to a source of ignition. The heat from an open flame can ignite the flammable vapors or liquid, leading to a dangerous fire hazard. It is important to ensure that flammable materials are stored and used in a safe environment away from any potential sources of ignition to prevent accidents and injuries.

10. You want to place a piece of glass tubing into a rubber stopper after the tubing has been fire polished and cooled. This is best done by:

Lubricating the tubing with water or glycerin

Using a towel or cotton gloves for protection

Twisting the tubing and stopper carefully

All of the above

To safely place a piece of glass tubing into a rubber stopper after it has been fire polished and cooled, it is best to lubricate the tubing with water or glycerin. This will reduce friction and make it easier to insert the tubing into the stopper without causing any damage. Additionally, using a towel or cotton gloves for protection is recommended to prevent any injuries or cuts from the sharp edges of the glass. Lastly, twisting the tubing and stopper carefully ensures a secure and tight fit. Therefore, all of the above options are the best practices for this task.

Explanation

To safely place a piece of glass tubing into a rubber stopper after it has been fire polished and cooled, it is best to lubricate the tubing with water or glycerin. This will reduce friction and make it easier to insert the tubing into the stopper without causing any damage. Additionally, using a towel or cotton gloves for protection is recommended to prevent any injuries or cuts from the sharp edges of the glass. Lastly, twisting the tubing and stopper carefully ensures a secure and tight fit. Therefore, all of the above options are the best practices for this task.