Laboratory Safety Manual Quiz

Questions and Answers

What should be done before attempting to stop a leak between a cylinder and regulator?

Remove the cylinder from the regulator

Close the valve first (correct)

Turn off all electrical equipment

Tighten the union nut immediately

What is the primary risk associated with inhalation of toxic chemicals in the laboratory?

Contamination of food and drink

Long-term damage from skin contact

Immediate effects on the body (correct)

Accidental ingestion through mouth suction

Why is ingestion of chemicals in laboratories less common?

It occurs primarily through contaminated food or drink (correct)

Chemicals only enter through skin contact

All chemicals are always contained in bottles

Lab personnel are fully trained to avoid this

What should be done with a leaking or damaged cylinder?

Remove it from service and contact the supplier Signup and view all the answers

What is a significant risk when smoking near volatile compounds?

Production of toxic products on pyrolysis Signup and view all the answers

Which route of absorption for chemicals is characterized by immediate effects on the body?

Inhalation into the lungs Signup and view all the answers

Which of the following statements is true about chemical absorption through the skin?

Liquids have greater penetration capacity than solids and gases Signup and view all the answers

How does the accidental contamination of food and drink commonly occur in the lab?

By mouth suction of pipettes Signup and view all the answers

What should be worn to provide adequate eye protection when handling solvents and chemicals?

Safety spectacles or goggles Signup and view all the answers

What is the recommended action if corrosive liquid is spilled on the skin?

Wash it off with cold water and soap if necessary Signup and view all the answers

Why should flooding a spillage with water be avoided?

It may spread the corrosive material into crevices Signup and view all the answers

When should protective gloves be replaced?

When they show signs of damage Signup and view all the answers

What is the best approach to cleaning up extensive spillages involving toxic fumes?

Wearing full protective clothing including respirators Signup and view all the answers

Why is using solvents to wash spilled chemicals from the skin discouraged?

It can increase absorption through the skin Signup and view all the answers

What should be done after checking rubber or plastic gloves for holes?

Wear them if they seem intact Signup and view all the answers

Which of the following is a course of action in case of sensitization to chemicals?

Stop additional exposure to prevent further reactions Signup and view all the answers

What should workers do before handling any chemical container?

Read the labels and follow their warnings. Signup and view all the answers

Which of the following is a responsibility of every worker regarding chemical labels?

Ensure every chemical container has a label. Signup and view all the answers

What type of signs should be prominently posted in the laboratory?

Emergency telephone numbers and safety equipment locations. Signup and view all the answers

According to the NFPA hazard labeling system, what information must be included on chemical containers?

The chemical identity, hazard warnings, and manufacturer details. Signup and view all the answers

What type of cabinet should acids be stored in to prevent corrosion of the storage unit?

Acid cabinet or corrosion-resistant lined cabinet Signup and view all the answers

What is an inappropriate action regarding chemical labels?

Removing labels that are difficult to read. Signup and view all the answers

What should an individual do if they find a dirty or illegible label on a chemical container?

Report it so that it can be replaced. Signup and view all the answers

What is the recommended initial action if hydrofluoric acid comes into contact with skin?

Wash the area with water for at least 5 minutes Signup and view all the answers

What is required for visitors allowed into the work area of a laboratory?

To wear appropriate safety equipment. Signup and view all the answers

Why should nitric acid be stored separately from other acids and organic materials?

It is highly reactive Signup and view all the answers

Which of the following statements about safety signs in a laboratory is false?

Signs can be posted randomly without urgency. Signup and view all the answers

What is the safest type of container for storing hydrofluoric acid?

Plastic bottle Signup and view all the answers

Which of the following is NOT a recommended action when using hydrofluoric acid?

Store it in a glass container Signup and view all the answers

What should be done with contaminated clothing after exposure to hydrofluoric acid?

Remove and dispose of them properly Signup and view all the answers

Which cream is recommended to treat exposure to hydrofluoric acid?

Calcium gluconate Signup and view all the answers

What should be done if hydrogen fluoride vapors are inhaled?

Move the person to an uncontaminated atmosphere and seek medical attention Signup and view all the answers

What is the first step to take if a person is lying down quietly after vomiting?

Turn the person's body and head to the side. Signup and view all the answers

How should you manage a person who is unconscious after an injury?

Keep them lying down and summon medical help. Signup and view all the answers

What is the best way to stop bleeding from a severe cut or wound?

Apply direct pressure with a gauze pad. Signup and view all the answers

What should you avoid doing to prevent aggravating a wound?

Dabbing at the wound frequently. Signup and view all the answers

Why is it important to keep a person calm and reassure them after an injury?

It can lead to faster recovery and lessen shock. Signup and view all the answers

What action should be taken if blood soaks through the gauze used on a wound?

Replace the gauze with a fresh pad. Signup and view all the answers

What should you do if a person has suffered burns?

Cut clothing if necessary to avoid added pain. Signup and view all the answers

What critical information should be relayed to a doctor when summoning medical help?

The nature of the emergency and steps taken. Signup and view all the answers

Study Notes

General Handling of Corrosives

Purchase corrosives in plastic-coated containers to minimize injury risk if dropped.
Store acids in acid cabinets or corrosion-resistant lined cabinets to prevent interior corrosion.
Separate nitric acid storage is crucial to avoid reactions with other acids and organic materials.

Hydrofluoric Acid Safety

Hydrofluoric acid can cause severe burns and can scavenge calcium from skin and bones.
Use hydrofluoric acid exclusively in functioning fume hoods with appropriate personal protective gear.
Immediate washing of any skin contact with hydrofluoric acid for at least 5 minutes is essential, followed by medical attention.
Never store hydrofluoric acid in glass containers; it is usually packaged in plastic bottles.

Chemical Absorption Pathways

Ingestion can occur via accidental contamination of food, drinks, or tobacco; avoiding mouth suction of pipettes is critical.
Inhalation is a common route, exposing workers to gases, vapors, dusts, or mists with potentially deadly consequences.
Direct skin contact leads to absorption; liquids penetrate more than solids or gases, increasing health risks.

Chemical Exposure Prevention

Use personal protective equipment such as gloves and goggles at all times.
Perform operations in fume cupboards when inhalation risk exists, additional respiratory protection may be necessary.
Clean spills immediately using appropriate methods, avoiding water if it spreads the corrosive material.

First Aid for Chemical Exposure

In the event of skin contact with corrosive substances, wash immediately and seek medical care.
Keep exposed individuals calm, warm, and avoid giving fluids unless fully conscious.
Direct pressure should be applied to severe wounds to control bleeding; constant pressure is crucial for effective clotting.

Safety Protocols for Visitors

All visitors must wear appropriate safety gear when entering the laboratory work areas.

Signs and Hazard Identification

Utilize the NFPA hazard labeling system for clear communication of safety and hazard information.
Ensure all chemical containers are labeled correctly, and report any missing or illegible labels.
Post signs indicating emergency contacts, safety equipment locations, and warnings for hazardous areas or equipment.

Laboratory Responsibility

Laboratory staff should familiarize themselves with chemical labels, report discrepancies, and ensure proper labeling on containers used for transferring chemicals.

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Description

Test your knowledge on essential laboratory safety practices related to handling and storing corrosive materials. This quiz covers proper storage methods and guidelines for minimizing risks associated with corrosives. Ensure you understand the importance of using appropriate containers and cabinets in a lab setting.