Contractor Exam Questions And Correct
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Rationales 2026 Q&A | Instant
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1. What is the primary objective of environmental remediation?
A. Reduce project cost
B. Improve site aesthetics
C. Eliminate or reduce contamination
D. Increase property value
Answer: C
Remediation aims to remove, reduce, or contain contaminants to
protect human health and the environment.
2. Which federal law governs hazardous waste generation, transport,
treatment, and disposal?
A. Clean Water Act
B. CERCLA
C. RCRA
D. NEPA
Answer: C
RCRA regulates hazardous waste from “cradle to grave.”
,3. CERCLA is commonly known as the:
A. Toxic Substance Control Act
B. Superfund Law
C. Brownfield Acceleration Act
D. Environmental Liability Act
Answer: B
CERCLA established the Superfund program for cleaning
contaminated sites.
4. A Phase I ESA is primarily used to:
A. Remove contaminated soil
B. Identify potential environmental liabilities
C. Test groundwater directly
D. Remediate hazardous waste
Answer: B
Phase I ESAs identify possible contamination using records review
and site reconnaissance.
5. Vapor intrusion involves contaminants migrating from:
A. Roof surfaces to indoor air
B. Soil or groundwater into indoor air
C. HVAC systems into soil
D. Surface water into buildings
Answer: B
Vapor intrusion occurs when volatile chemicals migrate upward
into structures.
6. Soil borings are typically used to:
A. Analyze air emissions
B. Determine soil/strata characteristics and contamination
, C. Measure radiation levels
D. Remove contaminated water
Answer: B
Borings provide subsurface samples for geologic and contaminant
analysis.
7. The term “LNAPL” refers to a liquid that:
A. Sinks in water
B. Is fully miscible with water
C. Floats on water
D. Reacts with water
Answer: C
LNAPLs (Light Non-Aqueous Phase Liquids) float due to lower
density than water.
8. A common remediation method for petroleum contamination is:
A. Phytoremediation
B. Air sparging
C. Ozone injection
D. Cryogenic stabilization
Answer: B
Air sparging is widely used for volatile petroleum contamination.
9. The Clean Water Act regulates:
A. Hazardous waste shipments
B. Air emissions
C. Discharges into U.S. waters
D. Soil cleanup criteria
Answer: C
CWA controls point-source discharges into navigable waters.