General Knowledge Quiz

A safety measure that physically separates workers from hazardous sources, like ionizing radiation.

A type of insurance company that aims to make a profit from its operations.

The preferred angle range for fixed industrial stairs to promote safe and comfortable climbing.

General ventilation with a compression of 10 or more air changes per hour is the best method for controlling these types of contaminants.

A type of insurance that covers liability arising from hazardous waste site cleanup.

A formula used in ventilation design to determine the number of air changes per hour in a room. It's calculated by dividing the ventilation system's volumetric flow rate by the room volume.

A type of insurance coverage that addresses potential losses related to business income disruption and the additional expenses incurred during recovery.

A crane is considered to be "on-rubber" when one or more of its tires are touching the ground.

A crane is considered "off-rubber" when all its tires are lifted off the ground, indicating the outriggers have been fully deployed.

This occurs when a load is lifted on a crane in a way that creates a sideways force on the boom, which can cause instability and failure.

This refers to a sudden change in the load that creates extra force on the crane's boom and lifting machinery, potentially causing damage.

A type of radiant energy that is invisible to the human eye but can be felt as heat. It can be emitted from molten glass and steel, potentially causing eye injuries.

The three elements needed to start a fire are: a heat source, a fuel source, and an oxidizing agent, usually oxygen.

The Illuminating Engineering Society (IES) provides guidelines for safe and effective lighting levels in different environments.

The National Institute for Occupational Safety and Health (NIOSH) is a federal agency that researches, recommends, and promotes workplace safety.

The Consumer Product Safety Commission (CPSC) regulates consumer products to ensure safety standards are met.

The Occupational Safety and Health Review Commission (OSHRC) is an independent agency that reviews decisions and conducts hearings related to worker safety.

A Closed Circuit Self Contained Breathing Apparatus (CCSCBA) is used in Immediately Dangerous to Life or Health (IDLH) atmospheres. It recycles air, removing carbon dioxide and adding fresh oxygen.

An Open Circuit Self Contained Breathing Apparatus (OCSCBA) provides air from a high-pressure tank and releases exhaled air into the atmosphere.

1. Atmospheres with less than 19.5% oxygen
2. In IDLH atmospheres
3. Atmospheres where contaminants are undetectable by odor or taste below permissible exposure levels (PELs) or threshold limit values (TLVs)

Self Contained Breathing Apparatus (SCBA) should be used in immediately dangerous to life or health (IDLH) conditions to provide positive pressure for respiratory protection.

Measures air velocity using a moving vane that rotates at a speed proportional to the airflow. Often used in spray booths.

A device that measures the pressure difference between the static pressure (SP) and total pressure (TP) of a fluid, resulting in velocity pressure (VP) output. It's commonly used to determine fluid velocity, but requires conversion to actual velocity.

The rate of airflow through an exhaust hood is crucial for effectively removing contaminants. Its design also depends on the hood's location and shape.

These factors adjust for the type and amount of clothing worn by workers, which can impact the amount of heat stress experienced. They range from 0.6 for lightweight summer clothes to 1.4 for winter garments.

A combination of chemicals that results in a combined effect greater than the sum of their individual effects.

A combination of chemicals that results in a combined effect equal to the sum of their individual effects.

A combination of chemicals that results in a combined effect less than the sum of their individual effects, potentially canceling each other out.

A combination of chemicals that results in a combined effect where one chemical significantly amplifies the effect of another.

The severity of an incident is categorized based on its potential harm, ranging from negligible to catastrophic.

The process of removing contaminants from the air by capturing them with a specific method, like grinding, blasting or tumbling.

A GFCI (Ground Fault Circuit Interrupter) will interrupt the electrical circuit within 1/40th of a second to prevent electric shock.

FMEA (Failure Mode and Effects Analysis) is generally more time-consuming than FTA (Fault Tree Analysis).

Fan speed directly impacts airflow (CFM). TP (Total Pressure) and SP (Static Pressure) are proportional to the square of the fan speed. Horsepower (HP) is proportional to the cube of the fan speed.

A cut set represents a point in a system where if cut, would prevent the system from operating.

To convert a LEL (Lower Explosive Limit) percentage to parts per million (ppm), multiply the percentage by a million.

The minimum foot-candle requirement for general construction work is 5 foot-candles. For first aid stations, it's 30 foot-candles.

Formaldehyde can be tested by using filters and impingers to collect the air sample, followed by Visible Absorption Spectrometry.

Organophosphates are a type of cholinesterase inhibitor, which are chemicals that prevent the breakdown of acetylcholine in the nervous system. When testing for cholinesterase inhibitors in blood, you're looking for low levels of cholinesterase enzyme activity.

The Delphi technique is a structured group communication method used to elicit expert opinions and judgments. It involves multiple rounds of anonymous feedback and discussion to reach a consensus.

OSHA's Fatal Four are the top four leading causes of workplace fatalities in the United States:

1. Falls (33%)
2. Struck by Object (22%)
3. Caught-in/Between (18%)
4. Electrical (17%)