100+ Free QEP Qualified Environmental Professional Practice Questions

Explanation: Mie scattering is responsible for the white, gray, or black appearance of smoke and steam plumes. It occurs when the particle size is similar to the wavelength of light. On cloudy days, the increased ambient light is scattered more effectively by the water droplets in the steam plume, making it appear more opaque. Rayleigh scattering applies to particles much smaller than the wavelength of light and is responsible for the blue color of the sky. The Tyndall effect is the scattering of light by particles in a colloid, and refraction is the bending of light as it passes through different mediums.

Explanation: Advection is the transport of a substance by the bulk movement of a fluid. In this case, rainwater infiltrating the soil and moving downward would carry the dissolved benzene with it. Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. Dispersion is the spreading of a substance as it moves with the fluid, caused by variations in velocity. Sorption is the attachment of a substance to soil particles, which would tend to retard its movement.

Explanation: Nitrification, the process of converting ammonia to nitrate, is carried out by nitrifying bacteria in the activated sludge. This process is aerobic and requires a sufficient amount of dissolved oxygen. A drop in the DO concentration would inhibit the activity of these bacteria, leading to a decrease in nitrification and an increase in the effluent ammonia concentration. A decrease in HRT could also cause this, but a drop in DO is a more direct cause. An increase in MCRT would tend to improve nitrification. A decrease in influent BOD would likely improve nitrification by reducing the oxygen demand from heterotrophic bacteria.

Explanation: The Resource Conservation and Recovery Act (RCRA) prohibits the dilution of a listed hazardous waste as a substitute for adequate treatment. This is known as the 'dilution is not the solution' principle. The mixture of a listed hazardous waste with a non-hazardous waste is still considered a hazardous waste, regardless of the concentration of the hazardous constituent in the final mixture. The other acts are not the primary regulations governing hazardous waste management.

Explanation: The ISO 14001 standard is based on the Plan-Do-Check-Act (PDCA) cycle. The 'Planning' phase involves identifying the environmental aspects of the organization's activities, products, and services, and determining their significant environmental impacts. This information is then used to establish environmental objectives and targets. The other options are part of the 'Check' (management reviews, internal audit) and 'Act' (corrective and preventive actions) phases of the cycle.

Explanation: The BGC Code of Ethics requires QEPs to be objective and truthful in their professional reports, statements, and testimony. Modifying a report to be more favorable to a client, when it is not supported by the data, is a violation of this code. The most appropriate course of action is to refuse to modify the report and, if necessary, withdraw from the case to avoid being associated with a misleading report. The other options are not consistent with the ethical obligations of a QEP.

Explanation: The cancer slope factor (CSF) is a measure of the carcinogenic potency of a chemical. It represents the upper-bound estimate of the probability of an individual developing cancer per unit of lifetime daily intake of the chemical. The reference dose (RfD) is a measure of the non-carcinogenic toxicity of a chemical. The NOAEL and LOAEL are used in the derivation of the RfD.

Explanation: The removal efficiency of a pollution control device is calculated as the difference between the inlet and outlet concentrations, divided by the inlet concentration, expressed as a percentage. To verify the claim of 99.9% removal efficiency, the environmental professional would need to see the data on the concentration of the pollutant at the inlet and outlet of the device. The other options are not directly relevant to the device's performance.

Explanation: An environmental impact assessment (EIA) is a systematic process for identifying, predicting, evaluating, and mitigating the potential environmental and social impacts of a proposed project. It is a comprehensive tool that considers a wide range of factors, including air and water quality, biodiversity, noise, and cultural heritage. A life cycle assessment (LCA) is a tool for evaluating the environmental impacts of a product or service throughout its entire life cycle. A risk assessment (RA) is a tool for evaluating the potential for adverse health or environmental effects from exposure to a particular substance or activity. A cost-benefit analysis (CBA) is a tool for comparing the costs and benefits of a project.

Explanation: The first step in ensuring compliance is to identify all of the applicable regulations. This includes federal, state, and local regulations, as well as any permit conditions. Once the applicable regulations have been identified, the manager can then take steps to ensure that the company is in compliance with them. This may include conducting a compliance audit, implementing an EMS, and training employees.