Question

How is the construction of the case designed to prevent dust from entering under specified test conditions?

1) By using airtight seals
2) By installing a dust filter
3) By maintaining positive pressure inside the case
4) By using a dust-proof coating on the case

Answer 1

The construction of the case is designed to prevent dust from entering through airtight seals, dust filters, maintaining positive pressure, and dust-proof coatings.

Step-by-step explanation:

The construction of the case is designed to prevent dust from entering under specified test conditions through the use of various methods:

1. Airtight seals: The case is fitted with airtight seals to prevent any dust particles from entering.
2. Dust filter: Some cases are equipped with a dust filter which traps dust particles and prevents them from entering the case.
3. Positive pressure: Maintaining positive pressure inside the case ensures that air flows out of the case instead of allowing dust to enter.
4. Dust-proof coating: Some cases come with a dust-proof coating on their surfaces, which helps in preventing dust particles from sticking to the case.