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RSReasonSpan™PE Mechanical: HVAC and Refrigeration
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Eight original questions · Two per domain

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Choose an answer, then inspect the reasoning and the wrong routes. This teaching sampler includes single-answer, numeric-entry and multiple-response questions. It is not a diagnostic or a readiness estimate.

HVAC Loads and Psychrometrics · HV-S01

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A roof has 1,200 ft² of net area and a stated overall U-factor of 0.04 Btu/(h·ft²·°F). The steady-state indoor-outdoor temperature difference is 50°F. Ignore solar gain and storage. The conductive heat-transfer rate is most nearly:

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