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Top 10 interview questions for HVAC

Top 10 interview questions for HVAC

Top 10 interview questions for HVAC

(OP)
What is full form of HVAC?
What are standards used in HVAC? ASHRAE and ISHRAE.
What is the heat load calculation? Heat load calculation is total of sensible and latent load present in confined space in BTU/hr (3416=1kW)
1TR= 3.51 KW/hr, 350-450CFM, 12000BTU/hr
What is electrical load?
What is occupation load?
What is sensible load? Load from occupants, from windows, from walls, from any electrical equipment like server rooms
What is latent load? Load from occupants, from windows, from walls
What is instrumentation load? Load from any electrical equipment like server rooms, rack rooms
What is high side and low side in HVAC?
High side-Chillers, cooling tower, cooling water pumps, AHU, chilled water pumps, fans,
Low side- duct, diffusers, dampeners, sensors.
What are different type of AC?
Water cooled- Rotary/Recip./ centrifugal chillers,
Air cooled- Rotary chiller, Centrifugal chiller, Package unit, Cassette unit
What type of chiller has better IKW/TR? Centrifugal type, it is 0.6 IKW/TR.
What is cleanroom? How many particles are allowed inside room as per cleanroom ISO 14464-1(FED std 209E equivalent)?
What are different type of filters? Pre-filer fiberglass, HEPA, ULPA

A well phrased question has answers in itself!!!

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