Hazard Recognition


Question Answer Notes
What type of hazard is created when two objects come in contact and produce a vibration? A. Mechanical; B. Sound; C. Motion; D. Pressure B. Sound  
True or false: It is OK to work in an area that is above the UEL of a gas because it cannot explode. False  
Which is not true about sound? A. It is energy that can be heard; B. It is produced when objects vibrate; C. It travels in transverse waves; D. It must travel through matter (air, water, glass, etc.) C. It travels in transverse waves  
Which type of radiation is most difficult to shield against? A. Alpha; B. Beta; C. Gamma C. Gamma  
Name two routes of entry for chemical exposures.

Ingestion; inhalation; absorption; injection

What are the three “how” questions that determine your dose? How much?; How long?; How often?  
True or false: All chemicals have warning properties below the PELs that help protect workers. False  
What is the action level for noise? A. 80 dBA TWA8; B. 85 dBA TWA8; C. 90 dBA TWA8; D. 95 dBA TWA8 B. 85 dBA TWA8  
Which noise monitor is used for compliance sampling? A. Noise indicator; B. Noise dosimeter; C. Sound level meter B. Noise dosimeter  
Rank these sounds from loudest (1) to softest (4). A. Sirens; B. Vacuum cleaner; C. Alarm clock; D. Motorcycle 1. A. Sirens; 2. D. Motorcycle; 3. C. Alarm clock; 4. B. Vacuum cleaner  
In 2012, the IARC classified diesel particulate matter as what? A. Known human carcinogen (1); B. Probable human carcinogen (2A); C. Possible human carcinogen (2B); D. Not classifiable as a human carcinogen (3) A. Known human carcinogen (1)  
According to MSHA, which is the maximum level of noise that may not be exceeded? A. 95 dB; B. 105 dB; C. 115 dB; D. 125 dB C. 115 dB  
Name two possible radiation sources on a mine site. Naturally occurring radioactive material (e.g., uranium, thorium); Gases (e.g., radon); Equipment (e.g., concentrators, x-rays)  
Electricity always wants to travel to the ______. A. Circuit; B. Ground; C. Insulation: D. Sky B. Ground  
What is the MSHA PEL for noise given as a TWA? A. 85 dBA; B. 90 dBA; C. 105 dBA; D. 115 dBA B. 90 dBA  
Approximately what percent of hazards are commonly identified in a work environment? A. < 25%; B. 25%; C. 45%; D. 75% C. 45%  
Which body parts are exposed to the most hazards in the workplace? A. Eyes; B. Hands; C. Ears; D. Feet B. Hands  
Rotating equipment is an example of what type of hazard? A. Gravity; B. Pressure; C. Chemical; D. Mechanical D. Mechanical  
Smelters, furnaces, and kilns present what type of hazard? A. Mechanical; B. Motion; C. Temperature; D. Pressure C. Temperature  
Liquid or gas compressed or under vacuum is an example of what type of hazard? A. Temperature; B. Pressure; C. Chemical; D. Biological B. Pressure  
Vehicles, equipment, flowing water, and wind are all examples of what type of hazard? A. Pressure; B. Motion; C. Temperature; D. Gravity B. Motion  
Name one situation where pinch points can be found. Between rotating parts; between rotating and fixed parts; parts rotating in opposite directions while parallel  
Toxic objects or substances that pose health risks are what type of hazard? A. Temperature; B. Gravity; C. Radiation; D. Chemical D. Chemical  
What is the exposure route you would be concerned about with a rattlesnake? A. Ingestion; B. Inhalation; C. Absorption; D. Injection D. Injection  
What is the most common cause of workplace fatalities? A. Falls; B. Harmful substances; C. Exposed moving parts; D. Overexertion A. Falls  
True or false: When evaluating hazards, you should always start by looking for those that lead to the most common types of injuries. False  
A change in the physical position or location of objects or substances represents which of the following energy sources? A. Gravity; B. Motion; C. Mechanical; D. Biological; E. All of the above B. Motion  
When is the best time to recognize hazards in your workplace? A. When your supervisor tells you to; B. Before you start a task; C. 30 minutes into a task; D. After you finish a task B. Before you start a task  
True or false: The longer you work in the same surroundings, the easier it is to recognize potential hazards. False  
What term is defined as analyzing the probability and severity of a risk in order to reduce the chance that harm will occur? Risk analysis  
True or false: Recognizing a condition or behavior that can cause harm is called risk analysis. False It is the definition of hazard recognition.
True or false: A risk assessment matrix can help you decide what is risky. True