CETA Calculations All Possible Questions and Answers with complete solution
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Course
CETA Calculations
Institution
CETA Calculations
Explain how to determine particles measuring in cubic feet per minute and reporting them in cubic
meter per minute. - Take your total counts of 24 per cubic feet per minute and multiply by 35.2 =
844.8.
Round up to 845 cubic meters per minute
Explain how to calculate air changes per hour from P...
CETA Calculations
Explain how to determine particles measuring in cubic feet per minute and reporting them in cubic
meter per minute. - Take your total counts of 24 per cubic feet per minute and multiply by 35.2 =
844.8.
Round up to 845 cubic meters per minute
Explain how to calculate air changes per hour from PEC - Length x width x fpm = CFM.
Total CFM divided by room volume x 60 = ACPH per that particle PEC.
Explain how to determine minimum CFM required from ceiling HEPA filters in HD room. - 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.
Explain how to calculate the quality of particle counts in a room. - 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.
Explain how to calculate a challenge for an aerosol leak test. - Take total Supply and total CFM.
(Supply of 400 CFM + Exhaust of 150 CFM = 550 CFM)
Total supply x fpm = CFM.
(550 CFM)
1 nozzle per 1,000 CFM.
1 nozzle: 13,500/550
=24.54 = 25
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