In-line fans are characterized by which configuration?

In-line fans are characterized by which configuration?

• A. Motor located outside the airstream with belts and pulleys protected by a greasetight housing
• B. Motor located outside the airstream with no protective housing
• C. Motor located inside the airstream
• D. In-line fans are not used in this application (none)

Answer: (D)

The idea being tested is recognizing that inline fans aren’t used in this particular installation. Inline fans are mounted directly in the duct and can have different motor arrangements (motor outside the airstream with a belt-driven, greased housing; motor outside without a protective housing; or motor inside the airstream in a direct-drive setup). However, in this application the system does not use an inline fan at all, so none of those described configurations apply. That’s why the correct conclusion is that inline fans are not used here, making the options that describe specific inline configurations not applicable to this situation.

The idea being tested is recognizing that inline fans aren’t used in this particular installation. Inline fans are mounted directly in the duct and can have different motor arrangements (motor outside the airstream with a belt-driven, greased housing; motor outside without a protective housing; or motor inside the airstream in a direct-drive setup). However, in this application the system does not use an inline fan at all, so none of those described configurations apply. That’s why the correct conclusion is that inline fans are not used here, making the options that describe specific inline configurations not applicable to this situation.