Hazardous Waste Management Multiple Choice Questions on “Characterization – Toxicity Test”.
1. Toxicity is characterized by _______
a) Instability
b) Volume
c) Temperature
d) Dosage
Answer: d
Clarification: Identified character of toxicity is the concentration of lethal dosage, also known as LD50.
2. A waste to be called toxic, acute oral LD50 concentration should be _______ mg/kg.
a) 2200
b) 2300
c) 2400
d) 2500
Answer: d
Clarification: A waste to be called acute oral toxic, LD50 concentration should be less than 2,500 milligrams per kilogram.
3. A waste to be called toxic, acute dermal LD50 concentration should be ________ mg/kg.
a) 2200
b) 4300
c) 2400
d) 2500
Answer: b
Clarification: A waste to be called acute dermal toxic, LD50 concentration should be less than 4300 milligrams per kilogram.
4. LC50 is associated with toxicity.
a) True
b) False
Answer: a
Clarification: LC50 is the measurement of micrograms or milligrams of material per liter or ppm of air or water. Lower the amount, more toxic the material.
5. A waste to be called toxic, acute inhalation LC50 concentration should be _______ ppm.
a) 2200
b) 4300
c) 2400
d) 10000
Answer: d
Clarification: A waste to be called acute inhalation toxic, LC50 concentration should be less than 10000ppm.
6. ________ test is done to determine toxicity level of waste.
a) EP
b) SD
c) AW
d) PO
Answer: a
Clarification: Extraction Procedure (EP), EP toxicity test is designed to identify which particular toxic constituent causes damage when improperly managed.
7. Leaching actions are observed for finding toxicity concentrations.
a) True
b) False
Answer: a
Clarification: Leachate from landfill is extracted to analyse the concentration of toxic contaminants.
8. Maximum concentration of D004 waste is ________ mg/L.
a) 2
b) 3
c) 4
d) 5
Answer: d
Clarification: The hazardous contaminant that has hazardous waste number D004 according to EPA is arsenic. The maximum concentration of arsenic is 5mg/L.
9. Maximum concentration of D009 waste is ________ mg/L.
a) 0.1
b) 0.2
c) 0.3
d) 0.4
Answer: b
Clarification: The hazardous contaminant that has hazardous waste number D009 according to EPA is mercury. The maximum concentration of mercury is 0.2mg/L.
10. Maximum concentration of D015 waste is _________ mg/L.
a) 0.2
b) 0.3
c) 0.4
d) 0.5
Answer: d
Clarification: The hazardous contaminant that has hazardous waste number D015 according to EPA is toxaphene. The maximum concentration of toxaphene is 0.5mg/L.
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