QAL Category Study Guide Questions With Answers

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QAL Category Study Guide Questions With Answers

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2025/2026

Institution QAL Laws And Regulations

Course QAL Laws and Regulations

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QAL Category Study Guide Questions With Answers

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QAL Category Study Guide Questions
// // // //

With Answers
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What is a fumigant - CORRECT ANSWERS(S)✔✔• Gases
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liquid, solids
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• Odorless and invisible
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• Toxic when absorbed or inhaled
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• Spread & penetrate spaces & materials
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• Non-selective pesticide (kills all)
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• Concentration, time, temp & humidity
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• No residual or post application protection
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• Forms
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// • Cylinders
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// • CO2: Carbon Dioxide: treat stored commodities,
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// containment structures, and outdoor burrowing rodents // // // // //

// • SO2: sulfur dioxide: wine barrels, corks, certain
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// commodities

Pros vs Cons - CORRECT ANSWERS(S)✔✔• PROS
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,• Toxic to all pests
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• Reach pest otherwise hard to locate, apply other
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pesticides
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• Can kill pest on/near foods w/o residual
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• Practical way to kill commodity pests
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• CONS
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• Very toxic
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• No post application protection
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• Expensive PPE
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• Applicators must be skilled: labor cost high
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• Applications require supervision to be effective
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Common fumigants: // //

• Sulfuryl fluoride
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• Carbon Dioxide (CO2)
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• Methyl bromide
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• MITC & MITC generating fumigants
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• Sulfur Dioxide (SO2)
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, Fumigant distribution in a space - CORRECT
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ANSWERS(S)✔✔• Molecular weight: measure of the
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weight of the atoms that forma particular substance
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• Specific gravity: ratio of the density of a substance to the
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density of a standard
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// • Standard for gas = 1
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// • Greater then 1 = heavier than air, sinks
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// • Less then 1 = lighter than air, rises
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• MW and SG: tell you
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// • SF = 3.52
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// • Labeled required fans to evenly distribute AI
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Volatility & Vapor pressure - CORRECT ANSWERS(S)✔✔•
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Volatility: describes how a substance turns to vapor
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• Vapor: measurement of the push against the atmosphere
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• Vapor pressure: pressure stabilize at a constant value
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// • Higher vapor pressure = more concentrated = better
// // // // // // // //

// fumigant

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Uploaded on: March 27, 2026
Number of pages: 16
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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