Home PYQs UPPSC UPPSC MCQs Prelims 2008 (GS Paper I)

Question

If the doors of a refrigerator are left open for a few hours, the room temperature:

  1. will decrease
  2. will increase
  3. will remain the same
  4. will decrease only in the area in the vicinity of the refrigerator

Answer:

Option B: will increase

Detailed Solution:

The correct answer is “will increase”.

If the doors of a refrigerator are left open for a few hours, the room temperature will increase.

This is because a refrigerator is a heat engine that transfers heat from a cold to a hot body. When the door is left open, heat is recycled from the room into the refrigerator, then back into the room.