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Question

Difficulty: MediumMust Be True / Most Strongly Supported

An urban planning commission established strict environmental certification rules for commercial skyscrapers constructed in the downtown transit district:

• Any building with a rooftop photovoltaic canopy must install an automated greywater reclamation system.
• No building with an automated greywater reclamation system is permitted to draw municipal coolant water during peak summer hours unless it also operates a subterranean thermal storage vault.
• Every building in the downtown transit district that operates a subterranean thermal storage vault qualifies for a municipal green rebate.

The Meridian Tower is a commercial skyscraper in the downtown transit district that draws municipal coolant water during peak summer hours and features a rooftop photovoltaic canopy.

Based on the statements above, which of the following statements must be true? (Select all that apply.)

  1. The Meridian Tower operates a subterranean thermal storage vault.Answer
  2. B
    Any commercial skyscraper in the downtown transit district that qualifies for a municipal green rebate must feature a rooftop photovoltaic canopy.
  3. The Meridian Tower qualifies for a municipal green rebate.Answer
  4. D
    Every commercial skyscraper in the downtown transit district that draws municipal coolant water during peak summer hours has an automated greywater reclamation system.
  5. E
    If a commercial skyscraper in the downtown transit district does not feature a rooftop photovoltaic canopy, it is barred from installing an automated greywater reclamation system.

Answer

The statements establishing that the Meridian Tower operates a subterranean thermal storage vault and that it qualifies for a municipal green rebate must both be true.
Following the conditional chain from the given facts (photovoltaic canopy and summer coolant drawing in the transit district) strictly guarantees both the presence of the subterranean thermal storage vault and the qualification for the municipal green rebate.

Step-by-Step Solution

1
Deduce the presence of the greywater system from the photovoltaic canopy.
The Meridian Tower has an automated greywater reclamation system.
The rule states that any building with a rooftop photovoltaic canopy must install an automated greywater reclamation system.
2
Deduce the presence of the subterranean thermal storage vault.
The Meridian Tower operates a subterranean thermal storage vault.
A building with an automated greywater system cannot draw municipal coolant water unless it operates a subterranean thermal storage vault. The Meridian Tower has such a greywater system and draws coolant water, so it must operate the vault.
3
Deduce the qualification for the municipal green rebate.
The Meridian Tower qualifies for a municipal green rebate.
Every building in the transit district operating a subterranean thermal storage vault qualifies for the rebate, and the Meridian Tower meets both criteria.

Key Concept

Multi-step conditional logic chaining and deductive certainty
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Topics

Must Be True / Most Strongly Supported

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