BUILDING CODES-MATERIALS EXAM #3
QUESTIONS WITH CORRECT ANSWERS
ceiling light - ANSWER-occupied spaces and corridors shall have a ceiling height of not
less than 7' 6"
occupant load - ANSWER-2 persons per 100 square feet
outdoor air - ANSWER-15 cubic feet per min (cfm) per person
noise reduction coefficient (NRC) - ANSWER-a type of average of sound absorption
coefficients from 250 Hz to 2 kHz the primary speech frequency range - NRC can range
from perfectly absorptive 1.0 to perfectly reflective 0.0
sound absorption - ANSWER-the incident sound that strikes a material that is not
reflected back; the more fibrous a material, the better absorber
Speech Intelligibility Index - ANSWER-SII is a weighted speech to noise ratio that
indicates how well speech can be understood in the presence of noise. the index ranges
from 0.0 to 1.0, where the lowest value is perfect privacy and the highest is perfect
intelligibility. .theaters and auditoriums require high SII values but offices and other
private locations need low SII values
Sound Absorption Average - ANSWER-SAA is a measurement of sound absorption and
is calculated by measuring the decay rate of the sound in a reverberation room
STC - ANSWER-sound transmission class
low 25
medium 45
high 65
standard way of describing sound isolation of constructions
determined by the components of the construction and how they are assembled
most popular materials for acoustical ceiling tiles - ANSWER-lay in mineral fibers and
fiberglass
typically used in suspended grid ceilings
BIFMA - ANSWER-trade association for business and institutional furniture
manufacturers. since 1937 BIFMA has been the voice of the commercial furniture
industry
OSHA - ANSWER-Occupational safety and health administration
ICC-ES stands for - ANSWER-international code council evaluation service
QUESTIONS WITH CORRECT ANSWERS
ceiling light - ANSWER-occupied spaces and corridors shall have a ceiling height of not
less than 7' 6"
occupant load - ANSWER-2 persons per 100 square feet
outdoor air - ANSWER-15 cubic feet per min (cfm) per person
noise reduction coefficient (NRC) - ANSWER-a type of average of sound absorption
coefficients from 250 Hz to 2 kHz the primary speech frequency range - NRC can range
from perfectly absorptive 1.0 to perfectly reflective 0.0
sound absorption - ANSWER-the incident sound that strikes a material that is not
reflected back; the more fibrous a material, the better absorber
Speech Intelligibility Index - ANSWER-SII is a weighted speech to noise ratio that
indicates how well speech can be understood in the presence of noise. the index ranges
from 0.0 to 1.0, where the lowest value is perfect privacy and the highest is perfect
intelligibility. .theaters and auditoriums require high SII values but offices and other
private locations need low SII values
Sound Absorption Average - ANSWER-SAA is a measurement of sound absorption and
is calculated by measuring the decay rate of the sound in a reverberation room
STC - ANSWER-sound transmission class
low 25
medium 45
high 65
standard way of describing sound isolation of constructions
determined by the components of the construction and how they are assembled
most popular materials for acoustical ceiling tiles - ANSWER-lay in mineral fibers and
fiberglass
typically used in suspended grid ceilings
BIFMA - ANSWER-trade association for business and institutional furniture
manufacturers. since 1937 BIFMA has been the voice of the commercial furniture
industry
OSHA - ANSWER-Occupational safety and health administration
ICC-ES stands for - ANSWER-international code council evaluation service
