Air pollutants are solid particles, gases, and liquid droplets in the air that can adversely affect ecosystems and the health of humans.
Major ambient air pollutants include toxic metals, polycyclic aromatic hydrocarbons, benzene, particulate matter (PM), nitrogen oxides, sulfur oxides, carbon monoxide, and ozone. Power plants, factories, and vehicle and air traffic are the most important anthropogenic sources of air pollution.
In addition, natural sources such as wildfires and volcanic activity contribute to ambient air pollution.
The prime cost calculates the use of raw materials and direct labor, but does not factor in indirect expenses, such as advertising and administrative costs.
Which of the following definitions describes a physical hazard?
A) The most commonly thought of hazard in construction. This hazard includes radiation, extreme temperatures, noise, and vibration.
B) These hazards can lead to injuries to the joints or muscles by way of heavy, frequent lifting, repetitive tasks.
C) Can be present in dust, fumes, liquids, solids, mists, vapors, or gases of products used at a site or released during a construction job
D) Microorganisms, such as bacteria, fungus, mold, or viruses that can cause illness.
A) The most commonly thought of hazard in construction. This hazard includes radiation, extreme temperatures, noise, and vibration.
B) These hazards can lead to injuries to the joints or muscles by way of heavy, frequent lifting, repetitive tasks.
C) Can be present in dust, fumes, liquids, solids, mists, vapors, or gases of products used at a site or released during a construction job
D) Microorganisms, such as bacteria, fungus, mold, or viruses that can cause illness.
Answer & ExplanationAnswer: A) The most commonly thought of hazard in construction. This hazard includes radiation, extreme temperatures, noise, and vibration.
Explanation:
A physical hazard is defined as "A factor within the environment that can harm the body without necessarily touching it."
Vibration and noise are examples of physical hazards.
Physical hazards include but aren't limited to electricity, radiation, pressure, noise, heights and vibration amongst many others.
The systematic name for a chemical is the unique name given to it by the International Union of Pure Applied Chemistry (IUPAC). The IUPAC name can differ from a chemical compound's general name.
PbO is an ionic compound since it consists of a Lead as metal and Oxygen as nonmetal. The systematic name for PbO is Lead (II) oxide. Here we need to put the (II) since lead has more than one combining capacity.
Aptitude and Reasoning
General Knowledge
Puzzles
Interviews
Technical
Certifications
Exams
Job
Roles
True or False
Exams