Spotting Techniques & Stain Removal Flashcards
7 cards from real CCT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Spotting Techniques & Stain Removal flashcards as text
An enzyme-based spotter is MOST effective on which category of stains?
Answer: Organic stains such as urine, blood, and food
Enzymes break down organic matter by catalyzing the decomposition of proteins, fats, and carbohydrates found in urine, blood, and food stains.
Why should hot water be avoided when treating a fresh blood stain?
Answer: Heat denatures the blood proteins, bonding them more tightly to the fibers
High heat coagulates blood proteins, essentially cooking them into the carpet fibers and making the stain much harder or impossible to remove.
A urine stain that has been left untreated for weeks may require which additional treatment beyond standard enzyme spotters?
Answer: Sub-surface extraction and possible pad replacement due to ammonia salt crystallization
Old urine deposits form uric acid salt crystals that penetrate the backing and pad; complete removal requires sub-surface extraction and sometimes pad replacement.
What pH range is considered neutral on the pH scale used in carpet spotting?
Answer: 7
A pH of 7 is neutral; spotters below 7 are acidic and those above 7 are alkaline, and matching pH to the stain type improves effectiveness.
When removing a wax or candle drip from carpet, what technique is commonly used before applying a solvent?
Answer: Freeze the wax with ice, then shatter and vacuum the brittle pieces
Freezing wax with ice makes it brittle so it can be cracked and vacuumed away, removing the bulk before any residual stain is treated with solvent.
Which of the following best describes a 'tannin' stain?
Answer: A plant-based stain from substances like coffee, tea, wine, and fruit juice
Tannins are naturally occurring plant polyphenols found in coffee, tea, wine, and many fruits, and they typically respond well to acidic or neutral detergent spotters.
What is the purpose of rinsing a spotted area with water or a neutralizing rinse after treatment?
Answer: To remove chemical residue that could attract soil and cause rapid resoiling
Spotting chemical residue left in carpet fibers acts as a magnet for new soil, so thorough rinsing is critical to prevent rapid resoiling of the treated area.