IICRC OCT Course 2023 - Practice Questions and answers

The _______ is the technician's best instrument for detecting the presence and intensity of an odor. Nose Odor is a gas interpreted by the ______________ ________________. Olfactory lobe The "pure" sensation of smell that is transmitted from the nose to the olfactory lobe by way of the olfactory nerve is called ________ _______. real odor _____________________ _______________ is a term used by some to describe odors which people believe they smell, based on experiences, suggestions and past impressions. Psychological odors The human sense that is capable of distinguishing odors at very low concentrations is the _____________ ____________. Olfactory sense An important property for a substance to have a detectable odor is ______________ solubility. water ___________________ is a condition where an individual becomes accustomed to an odor. Aclamation Odor is most apparent when ________________ and __________________ are high. humidity ; temperature Most deodorizations usually begin with the removal of the _____________. source Cleaning the source area is the __________________ principle of odor control. 2nd ________________________ is the third general principle in effective deodorization. Penetration ___________________ is the fourth principle of odor control. Sealing A __________________ is a compound that "locks-in" vaporous odor molecules. sealer Oxidizing agents break down organic matter by adding ________________. oxygen Chlorine bleach and ozone gas are ___________________. oxidizers Most deodorants used in smoke odor removal contain a combination of ________________ and ____________ agents. masking ; pairing A _____________ _____________ combines with and changes a malodorous substance to create a new odorless compound. pairing agent ________________ is a method of disguising a malodor with a stronger more pleasant odor. Masking Oils, gels or solid materials impregnated with fragrances to mask odors work on the ____________-__________ principle. time-released The process of enzymes breaking down an odor causing organic material (such as milk, eggs, fish or pet odors) is called ___________________. digestion A micron is a unit of measurement used to describe ________________ or ____________________. particle ; droplets Damage to moisture-sensitive materials is a concern when using _______________________________________________. high volume wet foggers A ULV fogger is used to cold-fog ___________________-based deodorants. water A ____________ fogger is specified primarily for use in the application of water based formulations where small deodorant droplets are desired that range from 8-15 microns. ULV A _____________ ________________ is a device that generates heat to produce petroleum-based deodorant droplets ranging in size between 0.5 to 2 microns. thermal fogger The use of thermal fogging in an odor intense environment can best be described as an odor modification or __________________ treatment. counteraction ______________ is an oxidizing gas with the chemical symbol 03. Ozone An electrically powered device used to produce an oxidizing odor-control gas is called an ________________ ___________________. ozone generator Ozone gas is ____________________ than air. heavier Plants and natural (latex) rubber may be damaged by prolonged exposure to _______________. ozone gas Coughing, sneezing, nose bleeding and severe eye irritation are symptoms of exposure to excessive _____________________ gas. ozone ______________ ___________ and _______ _____________ may prove useful to evacuate or dilute malodors or toxic gases. An activated charcoal filter can adsorb odors and purify the air. Exhaust fans ; air scrubbers An activated charcoal filter can _______ odors and purify the air. adsorb _________________ odors are persistent malodors resulting from burned meat or poultry. Protein Higher temperatures greatly ________________ the degree of odor penetration into porous surfaces and textiles. increase ___________________ ________________ is the most effective system for intense odor removal in structures. Relying on one method alone will yield incomplete results. Combining techniques Smoke odor removal work should _____________________ normal cleaning and any repair activity. precede The treatment phase begins with a _______________________ spray application to all surfaces in the source area. We refer to this step as preliminary detoxification. suppression