MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Hazardous Waste Management knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
LD50 in a toxicity test stands for ______ |
| A. | a dose that will kill 50% of an exposed population |
| B. | a dose that would not affect or harm 50% of an exposed population |
| C. | a dose that will kill 25% of an exposed population |
| D. | a dose that would not kill 25% of an exposed population |
| Answer» B. a dose that would not affect or harm 50% of an exposed population | |
| 2. |
What is the third step of risk assessment? |
| A. | Hazard identification |
| B. | Toxicity assessment |
| C. | Exposure assessment |
| D. | Corrosivity assessment |
| Answer» C. Exposure assessment | |
| 3. |
What is the main objective of toxicity assessment? |
| A. | To determine source of pathway |
| B. | To determine chemical concentration |
| C. | To estimate how much of a substance does what kind of harm. |
| D. | To analyse chemical exposure |
| Answer» D. To analyse chemical exposure | |
| 4. |
Which toxicity test is preferable to determine the acute or chronic toxicity of air, water and wastewater discharges or total pollutant loads? |
| A. | Indirect toxicity test |
| B. | Direct toxicity test |
| C. | Chemical analysis |
| D. | High toxicity test |
| Answer» C. Chemical analysis | |
| 5. |
Toxicity test is the experimental study of the adverse effects of exposure of a living organism to a substance for a defined duration under defined conditions. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
WHAT_IS_THE_MAIN_OBJECTIVE_OF_TOXICITY_ASSESSMENT??$ |
| A. | To determine source of pathway |
| B. | To determine chemical concentration |
| C. | To estimate how much of a substance does what kind of harm. |
| D. | To analyse chemical exposure |
| Answer» D. To analyse chemical exposure | |
| 7. |
LD50 in a toxicity test stands for ______$ |
| A. | a dose that will kill 50% of an exposed population |
| B. | a dose that would not affect or harm 50% of an exposed population |
| C. | a dose that will kill 25% of an exposed population |
| D. | a dose that would not kill 25% of an exposed population |
| Answer» B. a dose that would not affect or harm 50% of an exposed population | |
| 8. |
What is the third step of risk assessment?$ |
| A. | Hazard identification |
| B. | Toxicity assessment |
| C. | Exposure assessment |
| D. | Corrosivity assessment |
| Answer» C. Exposure assessment | |
| 9. |
Which toxicity test is preferable to determine the acute or chronic toxicity of air, water and wastewater discharges or total pollutant loads? |
| A. | Indirect toxicity test |
| B. | Direct toxicity test |
| C. | Chemical analysis |
| D. | High toxicity test |
| Answer» C. Chemical analysis | |
| 10. |
_________ is an interpretation tool which enables toxicity of unknown mixtures of chemicals be converted into the concentration of an equivalently toxic reference substance. |
| A. | Toxicity equivalencing |
| B. | Toxicity index |
| C. | Toxicity proportion |
| D. | Toxicity interpretation |
| Answer» B. Toxicity index | |
| 11. |
Results from long-term exposure to lower doses of a chemical is known as ________ |
| A. | Acute toxicity |
| B. | Chronic toxicity |
| C. | Moderate toxicity |
| D. | High toxicity |
| Answer» C. Moderate toxicity | |
| 12. |
Toxicity test is the experimental study of the adverse effects of exposure of a living organism to a substance for a defined duration under defined conditions. True of False. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
What is toxicity equivalence factor? |
| A. | Ratio of the toxicity of a chemical to that of another structurally related chemical (or index compound) chosen as a reference |
| B. | Ratio of the toxicity of a contaminant to that of another structurally related chemical (or index compound) chosen as a reference |
| C. | Ratio of the toxicity of a chemical to that of another chemical pollutant chosen as a reference |
| D. | Ratio of the toxicity of a chemical to that of source |
| Answer» B. Ratio of the toxicity of a contaminant to that of another structurally related chemical (or index compound) chosen as a reference | |
| 14. |
Which of the following is not characteristics of hazardous waste? |
| A. | Toxicity |
| B. | Corrosivity |
| C. | Ignitibility |
| D. | Leakage |
| Answer» E. | |
| 15. |
___________ establishes the relationship between the contaminant/s of concern and the receptor. |
| A. | Hazard identification |
| B. | Toxicity assessment |
| C. | Risk characterisation |
| D. | Exposure assessment |
| Answer» C. Risk characterisation | |
| 16. |
What are the steps involved in evaluation of toxicity? |
| A. | hazard identification and dose-response evaluation |
| B. | chemical analysis |
| C. | pathway analysis |
| D. | evaluation of long term impact |
| Answer» B. chemical analysis | |