CCT Spotting Techniques & Stain Removal 3

Question 1

An enzyme-based spotter is MOST effective on which category of stains?

Accepted Answer

Organic stains such as urine, blood, and food

Answer

Enzymes break down organic matter by catalyzing the decomposition of proteins, fats, and carbohydrates found in urine, blood, and food stains.

Question 2

Why should hot water be avoided when treating a fresh blood stain?

Accepted Answer

Heat denatures the blood proteins, bonding them more tightly to the fibers

Answer

High heat coagulates blood proteins, essentially cooking them into the carpet fibers and making the stain much harder or impossible to remove.

Question 3

A urine stain that has been left untreated for weeks may require which additional treatment beyond standard enzyme spotters?

Accepted Answer

Sub-surface extraction and possible pad replacement due to ammonia salt crystallization

Answer

Old urine deposits form uric acid salt crystals that penetrate the backing and pad; complete removal requires sub-surface extraction and sometimes pad replacement.

Question 4

What pH range is considered neutral on the pH scale used in carpet spotting?

Accepted Answer

7

Answer

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.

Question 5

When removing a wax or candle drip from carpet, what technique is commonly used before applying a solvent?

Accepted Answer

Freeze the wax with ice, then shatter and vacuum the brittle pieces

Answer

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.

(CCT) Carpet Cleaning Technician Certified Practice Test

(CCT) Carpet Cleaning Technician Certified Practice Test

CCT Spotting Techniques & Stain Removal 3