The GATE Grind

GATE 2024 AR — Architecture – Question 60

Climatology and Environmentally Responsive Design · Building energy audit and management · 2 marks · Multiple select

Which unit statements are correct?

  1. Lighting-power density is W/m².
  2. Lighting-power density is cd/m².
  3. Sound power is W.
  4. Energy performance index is kWh/m²/year.

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Show answer and explanation

Correct answer: (A) Lighting-power density is W/m².; (C) Sound power is W.; (D) Energy performance index is kWh/m²/year.

Explanation

LPD measures electrical power per floor area, W/m²(A). Sound power is an energy-transfer rate, in watts(C). Annual EPI normalises energy by area and year(D). Candela/m² measures luminance, not power density. Select A, C, D.

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