MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Overconsumption and shortage of metals can have deleterious effects on an |
| A. | Organisms |
| B. | Planktons |
| C. | Zooplanktons |
| D. | Phytoplanktons |
| Answer» B. Planktons | |
| 2. |
Chemical contamination is also known as |
| A. | Fall of chemical compounds |
| B. | Rise of chemicals |
| C. | Chemical solubility |
| D. | chemical inherency |
| Answer» E. | |
| 3. |
Dredging deliver sounds with an average intensity, ranges between |
| A. | 360-780 dB |
| B. | 160-780 dB |
| C. | 160-180 dB |
| D. | 160-700 dB |
| Answer» D. 160-700 dB | |
| 4. |
Resin pellets, having a diameter, approximately |
| A. | 8-9mm |
| B. | 4-7mm |
| C. | 2-6mm |
| D. | 9mm |
| Answer» D. 9mm | |
| 5. |
Xenobiotic products, bind strongly with bases and forms |
| A. | Hormones |
| B. | Enzymes |
| C. | Adducts |
| D. | Cytochrome |
| Answer» D. Cytochrome | |
| 6. |
Process engrossed in photo oxidation, breaking down oil into |
| A. | water-soluble components |
| B. | Non water soluble compounds |
| C. | Toxic compounds |
| D. | non-toxic compound |
| Answer» B. Non water soluble compounds | |
| 7. |
Rubber boot soles take 50 to 80 years to |
| A. | decompose |
| B. | rotten |
| C. | recycle |
| D. | form |
| Answer» B. rotten | |
| 8. |
Toxicology is associated with study of |
| A. | Enzymes |
| B. | Deserts |
| C. | Poison |
| D. | germs |
| Answer» D. germs | |
| 9. |
All commercial vessels are equiped with |
| A. | Sonar |
| B. | Machines |
| C. | Fishing nets |
| D. | All of them |
| Answer» B. Machines | |
| 10. |
Almost, 33% of pollution, originated in the |
| A. | Atmosphere |
| B. | Agriculture |
| C. | Industries |
| D. | factories chemical waste |
| Answer» B. Agriculture | |
| 11. |
Exotic species are also known as |
| A. | Aquatic hitch hikers |
| B. | Foreign Species |
| C. | Non indigenous |
| D. | All of above |
| Answer» B. Foreign Species | |
| 12. |
TLV-TWA is limit for an average exposure to chemicals on basis of |
| A. | 12h/day |
| B. | 8h/day |
| C. | 6h/day |
| D. | 1h/day |
| Answer» C. 6h/day | |
| 13. |
Calcium helps in bone tissue |
| A. | Formation |
| B. | Production |
| C. | Synthesis |
| D. | Creation |
| Answer» D. Creation | |
| 14. |
Aromatic hydrocarbons consist of |
| A. | Five carbon ring |
| B. | Seven carbon ring |
| C. | 3 carbon ring |
| D. | six carbon ring |
| Answer» E. | |
| 15. |
Almost, 30ppm, a sewage sludge emits |
| A. | Lead |
| B. | Cadmium |
| C. | Zinc |
| D. | Mercury |
| Answer» C. Zinc | |
| 16. |
Atmosphere consists for around 78% of |
| A. | Nitrogen Gas |
| B. | carbon |
| C. | Carbon dioxide |
| D. | CFCs |
| Answer» B. carbon | |
| 17. |
About 0.25-0.5 ppm of cadmium is originated from |
| A. | Volcanoes |
| B. | Coal burning |
| C. | Fire |
| D. | dust fibers |
| Answer» C. Fire | |
| 18. |
Average composition of mineral oils in aromatic, approximately |
| A. | 0.7 |
| B. | 0.1 |
| C. | 0.3 |
| D. | 0.15 |
| Answer» E. | |
| 19. |
Lindane acts as a neurotoxin by interfering with regular neurotransmitter |
| A. | aminobutyric acid |
| B. | Aromatic carbons |
| C. | Hydrocarbons |
| D. | Proteins |
| Answer» B. Aromatic carbons | |
| 20. |
Almost, every year, 800000 tons of single use plastic bags are produced in |
| A. | Australia |
| B. | Asia |
| C. | America |
| D. | European union |
| Answer» E. | |
| 21. |
Aromatic hydrocarbons, included benzene, toluene and |
| A. | Ethyl banzene |
| B. | Alkane |
| C. | Alkyne |
| D. | Alkalene |
| Answer» B. Alkane | |
| 22. |
In 1991, during Gulf War, an estimates of 9 million barrels of oil was |
| A. | Produced |
| B. | Lost |
| C. | Formed |
| D. | increased |
| Answer» C. Formed | |
| 23. |
Best known organic pollutant is defined as |
| A. | DDT |
| B. | Petroleum |
| C. | CCFs |
| D. | Ozone |
| Answer» C. CCFs | |
| 24. |
Persistent oils are classified on basis of their |
| A. | Temperature |
| B. | Specific gravity |
| C. | Pressure |
| D. | Humidity |
| Answer» C. Pressure | |
| 25. |
In eutrophication, water body acquires a high concentration of |
| A. | Planktons |
| B. | Salts |
| C. | Nutrients |
| D. | Fishes |
| Answer» D. Fishes | |
| 26. |
As considering mortality rate, three but not more than 6 animals are consuming |
| A. | per dose level |
| B. | An hour |
| C. | Per months |
| D. | Each week |
| Answer» B. An hour | |
| 27. |
methylated forms of mercury, easily taken up by organisms, approaching |
| A. | Lowest trophic level |
| B. | Highest trophic level |
| C. | Hetertrophs |
| D. | highest temperature |
| Answer» B. Highest trophic level | |
| 28. |
Anommox transforms helps in fixing nitrogen back to |
| A. | Ammonia |
| B. | Nitrites |
| C. | Nitrates |
| D. | Nitrogen gas |
| Answer» E. | |
| 29. |
Medium and Heavy Oils having a severe effect on sea birds and |
| A. | Wild animals |
| B. | Plants |
| C. | Sea mammals |
| D. | Fishes |
| Answer» D. Fishes | |
| 30. |
In rats, an estimated oral dosage, about 15000 mg/kg, termed as |
| A. | Very Toxic |
| B. | Relatively Harmless |
| C. | Moderately Toxic |
| D. | acidic |
| Answer» C. Moderately Toxic | |
| 31. |
After dying out of algae, remaining biomass is mineralized by |
| A. | Bacteria |
| B. | Insects |
| C. | Planktons |
| D. | microrganisms |
| Answer» B. Insects | |
| 32. |
TLV-C is an absolute exposure limit that is supposed to be not exceeded |
| A. | All the time |
| B. | any time |
| C. | I hour |
| D. | 9 weeks |
| Answer» C. I hour | |
| 33. |
Reference dose is defined as estimates of daily oral exposure, human activities during |
| A. | weeks |
| B. | Decades |
| C. | Months |
| D. | Life time |
| Answer» E. | |
| 34. |
Plastics are able to adsorb a polar organic materials such as polyaromatic and |
| A. | Alkynes |
| B. | Alkanes |
| C. | Aliphatic hydrocarbons |
| D. | polychlorinated hydrocarbons. |
| Answer» E. | |
| 35. |
Mercury form complexes with organic molecules in sea, such as cysteine residues and |
| A. | Methane |
| B. | Ethylene |
| C. | humic acids |
| D. | Sulphuric acid |
| Answer» D. Sulphuric acid | |
| 36. |
Nitrogen and phosphates end up in water from land, sewage water and |
| A. | Planktons |
| B. | Phytoplanktons |
| C. | Waste material |
| D. | Glacial |
| Answer» D. Glacial | |
| 37. |
Hexanol, toluene, dioctylphthalate and xylene tend to |
| A. | Float |
| B. | Evaporate |
| C. | Dissolved |
| D. | Mixed |
| Answer» B. Evaporate | |
| 38. |
In comparing different organism, to their food chain, involved in using a stable |
| A. | Isotopes of Nitrogen |
| B. | Isotopes of Carbon |
| C. | Isotopes of Oxygen |
| D. | Isotopes of Helium |
| Answer» B. Isotopes of Carbon | |
| 39. |
Hexachlorobenzene is a carcinogenic, affecting |
| A. | Liver function |
| B. | Kidney function |
| C. | digestion problem |
| D. | Respiration issues |
| Answer» B. Kidney function | |
| 40. |
Metals taken up by marine organism through atmosphere, inhalation and |
| A. | Soils |
| B. | Adsorption via skin |
| C. | Oceans |
| D. | land |
| Answer» C. Oceans | |
| 41. |
Proto-ontogenesis is defined as genes that are able to control normal growth and |
| A. | Fusion of cells |
| B. | development of cells |
| C. | Function of cells |
| D. | Physiology of cells |
| Answer» C. Function of cells | |
| 42. |
Biocides are recognized as a chemical product, utilized in killing different |
| A. | Land organisms |
| B. | Sea organism |
| C. | Insects |
| D. | animals |
| Answer» C. Insects | |
| 43. |
Lead has become in bluish-white color, after being freshly |
| A. | Manufactured |
| B. | Formed |
| C. | Penetrate |
| D. | Produced |
| Answer» D. Produced | |
| 44. |
About, three groups of bacteria are enable in breaking down spilled |
| A. | Oil |
| B. | Water |
| C. | Hydrocarbons |
| D. | Minerals |
| Answer» D. Minerals | |
| 45. |
Impact of a chemical substance on an ecosystem, measured by a |
| A. | Chemical test |
| B. | Toxicological Test |
| C. | Lab tests |
| D. | tube test |
| Answer» C. Lab tests | |
| 46. |
Lindane compound served as a pesticide in agriculture and |
| A. | Plants |
| B. | Animals |
| C. | Treatment of insects |
| D. | treatment of lice infections |
| Answer» E. | |
| 47. |
Drilling causes loud sounds, about |
| A. | 200dB |
| B. | 190dB |
| C. | 300dB |
| D. | 150dB |
| Answer» C. 300dB | |
| 48. |
DMHg stands for |
| A. | Di methane mercury |
| B. | Dimethyl mercury |
| C. | Di methane methyl |
| D. | Di methyl methane |
| Answer» C. Di methane methyl | |
| 49. |
Process involved in degradation of PAHs, employing natural means, resulting from |
| A. | Microbiological activity |
| B. | Plants |
| C. | Insects |
| D. | aquatic species |
| Answer» B. Plants | |
| 50. |
Urban and industrial run off, containing large amount of |
| A. | Nitrogen and Phosphorous |
| B. | Oxygen and carbon |
| C. | Metals and non Metals |
| D. | Organic and Inorganic waste |
| Answer» B. Oxygen and carbon | |