engineering recuitment UPPSC AE Mock Test 2024 Refrigeration and Air Conditioning Air Conditioning

Consider the following statements :

Air washer can work as

1. Humidifier only

2. Dehumidifier only

3. Filter only

Which of the statements given above is/are correct ? 

1
Only 1
2
Only 2 and 3
3
Only 1 and 3
4
1, 2 and 3
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