FREE Certified Industrial Hygienist Occupational Health Hazards Questions and Answers
When exposure occurs via a method other than inhalation, the calculated dose of a drug that is anticipated to kill 50% of a specified experimental animal population is known as the:
LD50 stands for "lethal dose for 50 percent" or "median lethal dose." It is a measure commonly used in toxicology to assess the acute toxicity of a substance. The LD50 is usually expressed in milligrams of substance per kilogram of body weight (mg/kg) and indicates the amount of a substance that, on average, is lethal to half of the test animals in a given population within a specified time frame.
The signs of this illness include weakness, headaches, dizziness, weariness, and blurred vision.
Heat exhaustion is a heat-related illness that occurs when the body is unable to cool itself properly, usually due to prolonged exposure to high temperatures and inadequate fluid intake. It is often a result of heavy physical activity in hot and humid conditions.
The following is the most often used laser safety standard in the US:
The LIA/ANSI Z136.1 standard provides guidelines and recommendations for the safe use of lasers in various settings, including industrial, medical, research, and educational environments. It covers various aspects of laser safety, such as laser classification, hazard evaluation, controls, protective measures, and training requirements.
Why do a lot of workplaces nowadays provide unusual occupational health risks?
Many workplaces today are presenting nontraditional occupational health hazards due to a shift from manufacturing to service-oriented industries. Traditionally, occupational health hazards were often associated with manufacturing and industrial settings, where workers were exposed to physical hazards such as machinery, chemicals, and noise. However, with the changing landscape of the workforce and the rise of service-based industries, new types of occupational health hazards have emerged.
The ACGIH published this exposure guideline for airborne concentrations, known as the
The TLV is the airborne concentration of a substance to which it is believed that nearly all workers can be exposed day after day without experiencing adverse health effects. TLVs are developed based on the most current scientific information available, including studies on the toxicological properties of substances, and are regularly updated as new research becomes available.
The safety and health manager must first be familiar with the raw materials used and the nature of the finished goods in order to spot hazardous environmental conditions or stressors in the workplace. The safety expert would seek advice from:
Material Safety Data Sheets (MSDSs), also known as Safety Data Sheets (SDSs), are documents that provide detailed information about hazardous substances, including chemicals and products used in the workplace. They are prepared by the manufacturer, importer, or distributor of the substances and contain essential information about their properties, potential hazards, safe handling, storage, and emergency procedures.
Which approach might be required if it is not possible to make the workplace entirely safe?
Personal Protective Equipment (PPE) is a strategy used when it is not feasible to completely eliminate or control a hazard at the source. While engineering controls are the preferred method to reduce or eliminate hazards, there are situations where it may not be practical or possible to make the working environment completely safe through engineering controls alone.
The following factors are all crucial ones to take into account when sampling air, with the exception of:
The sequence of sampling may be considered as part of the overall sampling plan, it is not typically regarded as an extremely important consideration compared to the factors mentioned above. The sampling plan should be well-designed, and the actual sequence of sampling should be based on the specific needs and objectives of the air sampling program.
Which of the following methods for reducing or eliminating workplace health risks is most effective?
Engineering controls are strategies for controlling occupational health hazards that aim to reduce or eliminate the hazard at its source. These controls involve modifying the work environment or processes to minimize or eliminate the exposure to the hazardous agent or substance. By implementing engineering controls, the focus is on redesigning equipment, processes, or work areas to make them safer and less hazardous for the workers.
The time-weighted average concentration for the TLV-TWA is:
The TLV-TWA (Threshold Limit Value - Time Weighted Average) is the time-weighted average concentration of a hazardous substance to which it is believed that most workers can be exposed without experiencing adverse health effects during an 8-hour workday and a 40-hour workweek.
All of the following tactics—with the exception of—are used to control occupational health hazards:
Strategies for controlling occupational health hazards typically include various measures to prevent or minimize exposure to hazards in the workplace. Inspections and audits are not usually considered as primary control strategies for occupational health hazards. Instead, inspections and audits are tools used to assess the effectiveness of existing control measures and to identify areas where improvements are needed.
What discipline of science investigates a substance's toxicity or poisonousness?
Toxicology is the science that studies the poisonous or toxic properties of substances. It is a multidisciplinary field that investigates the adverse effects of chemical, physical, or biological agents on living organisms, including humans. Toxicologists study how substances interact with the body, the mechanisms of toxicity, and the potential health hazards associated with exposure to these substances.
Which of the following is not regarded as having an impact on the danger posed by exposure to a hazardous environment?
The degree of probability of exposure refers to the likelihood that workers may come into contact with a hazard in their workplace. While it is important for risk assessment and prevention planning, it is not a direct factor influencing the inherent hazard of the harmful environment itself. The actual hazard is determined by the properties and characteristics of the hazardous substances or physical agents present in the environment.
Which of the following approaches is regarded as the first line of defense for limiting workplace health risks?
Engineering controls are considered the first line of defense for controlling occupational health hazards. These controls involve modifying the work environment or processes to eliminate or minimize the hazard at its source, thereby preventing or reducing worker exposure to the hazardous agent or substance.
The maximum concentration of an airborne pollutant for a continuous 15-minute exposure is as follows:
The TLV-STEL (Threshold Limit Value - Short-Term Exposure Limit) is the maximum airborne contaminant concentration to which workers can be exposed continuously for a 15-minute period without experiencing adverse health effects.
Which of the following organizations releases TLVs and PELs?
TLVs (Threshold Limit Values) are published by the American Conference of Governmental Industrial Hygienists (ACGIH), while PELs (Permissible Exposure Limits) are published by the Occupational Safety and Health Administration (OSHA).