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CETA Calculations 100% Correct
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CETA Calculations 100% CorrectCalculate ACPH - ANSWER Room dimension: length x width x height = cubic feet.
Total CFM from all HEPA filters in room.
Total CFM / Room volume x 60 = ACPH.
Calculate ACPH from PEC - ANSWER Length x width x fpm = CFM.
Total CFM divided by room volume x 60 = ACPH per that particle PEC.
Explain how minimum CFM required from ceiling HEPA filters are determined in the HD
room. ANSWER Take minimum 30 ACPH (or whatever ACPH for that ISO Class) / 60 = 0.5
and multiply by the room volume (500 cu. ft.) =250 CFM total HEPA filtered air supply.
Describe how to quantify the quality of counts of particles in a room. - ANSWER Take
room dimensions of 300" length x 413" width to achieve 123,900 in2 and divide by 144 =
860.417 ft2.
Convert feet to meters.
Take 860.417 ft2 x 0.093 = 80.02
Take the square root of 80.02. The number of sample locations for this room is 9.
Describe how to determine the calculation of a challenge for an aerosol leak test. -
ANSWER Take total Supply and total CFM. (Supply of 400 CFM + Exhaust of 150 CFM =
550 CFM)
Total supply x fpm = CFM.
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