Practice Test Geeks(EMS) Environmental Management Systems Internal Auditor Certification Practice Test
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Math-Science Cross-Curricular Lessons Flashcards

7 cards from real EMS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Math-Science Cross-Curricular Lessons flashcards as text

  1. An EMS auditor finds that a facility's chemical oxygen demand (COD) in effluent averages 180 mg/L against a permit limit of 150 mg/L. The exceedance expressed as a ratio to the permit limit is:

    Answer: 1.2

    Ratio = measured ÷ limit = 180 ÷ 150 = 1.2, meaning the facility exceeds the limit by 20%.

  2. The Le Chatelier's Principle is applied in scrubber design to remove SO₂ from stack gases using a lime (CaO) slurry. Adding excess CaO shifts the absorption reaction in which direction?

    Answer: Toward more SO₂ absorption (product formation)

    Adding excess reactant (CaO) shifts equilibrium toward products per Le Chatelier's Principle, increasing SO₂ removal.

  3. An EMS performance metric tracks the ratio of recycled water to total water intake. If 3,500 m³ of the 5,000 m³ total intake is recycled, what is the water recycling rate?

    Answer: 70%

    Recycling rate = 3,500 ÷ 5,000 × 100 = 70%.

  4. In the context of EMS life cycle assessment (LCA), which mathematical method is used to allocate environmental burdens between co-products based on their mass output?

    Answer: Mass-based allocation using proportion of co-product masses

    Mass-based allocation distributes environmental burdens proportionally by the mass fraction of each co-product, a common ISO 14044 approach.

  5. A facility's annual waste manifest data shows 8% Class 1 hazardous, 22% Class 2 non-hazardous, and 70% recyclable. If total waste is 500 t, how many tonnes are classified as hazardous?

    Answer: 40 t

    Hazardous waste = 8% × 500 t = 40 t.

  6. An EMS auditor uses the Nernst equation to evaluate electrochemical treatment performance. What does the Nernst equation primarily calculate?

    Answer: The cell potential under non-standard conditions based on ion concentrations

    The Nernst equation relates cell potential to standard potential and the reaction quotient, accounting for actual ion concentrations in solution.

  7. When applying material balance (mass balance) during an EMS audit of a paint spraying operation, the equation Input = Output + Accumulation + Loss is used. If input solvent = 200 kg, output in product = 30 kg, and accumulation = 10 kg, what is the estimated solvent loss (emissions + waste)?

    Answer: 160 kg

    Loss = Input − Output − Accumulation = 200 − 30 − 10 = 160 kg.