CCT Cleaning Methods & Equipment Usage 4 — Questions and Answers
Question 1: Absorbent compound cleaning uses a moist, absorbent carrier material. After working it into the carpet, how is the compound and soil removed?
- Wet extraction with a portable unit
- Vacuuming with a commercial upright or canister vacuum (Correct answer)
- Rinsing with cold water and blotting
- Neutralizing with an acid rinse and air drying
Correct answer: Vacuuming with a commercial upright or canister vacuum
Once the absorbent compound dries with the soil absorbed into it, thorough vacuuming removes the compound along with the trapped soil.
Question 2: Which equipment component on a truck-mount converts engine power into vacuum and water pressure?
- Heat exchanger
- Chemical proportioner
- Blower (vacuum producer) and pump assembly (Correct answer)
- Waste recovery tank
Correct answer: Blower (vacuum producer) and pump assembly
The blower generates vacuum lift while the high-pressure pump drives water through the system; both are typically powered directly by the vehicle engine or a separate power unit.
Question 3: When cleaning stairs with a portable unit, which practice minimizes the risk of overwetting?
- Increase chemical dwell time and reduce water volume
- Use a smaller stair tool with fewer extraction passes
- Make multiple wet passes followed by a single dry extraction pass (Correct answer)
- Apply dry foam and extract in one combined pass
Correct answer: Make multiple wet passes followed by a single dry extraction pass
Multiple wet passes followed by dedicated dry extraction strokes ensures maximum moisture removal from the thinner stair tread, reducing drying time and overwetting risk.
Question 4: What is the function of a water softener installed on a truck-mount system?
- It heats water to sterilization temperatures
- It removes minerals that reduce chemical effectiveness and cause scale buildup (Correct answer)
- It adjusts water pH to match fiber requirements
- It increases water pressure at the wand
Correct answer: It removes minerals that reduce chemical effectiveness and cause scale buildup
Hard water minerals (calcium, magnesium) interfere with detergent performance and deposit scale in hoses and heat exchangers; a water softener removes these minerals.
Question 5: A rotary extractor (RX-20 style) should NOT be used on which carpet type?
- Commercial loop-pile nylon
- Solution-dyed nylon cut pile
- Polyester cut pile residential carpet
- High-pile shag or frieze carpet (Correct answer)
Correct answer: High-pile shag or frieze carpet
The spinning heads of a rotary extractor can tangle and mat high-pile shag or frieze fibers, causing severe damage that is difficult or impossible to reverse.
Question 6: What role does grooming (raking) play immediately after hot water extraction?
- It re-activates cleaning chemistry left in the pile
- It sets the pile in one direction, speeds drying, and improves appearance (Correct answer)
- It compresses the pile to seal in residual moisture
- It neutralizes alkaline chemistry by mechanical action
Correct answer: It sets the pile in one direction, speeds drying, and improves appearance
Post-cleaning grooming with a carpet rake or groom tool sets the pile uniformly, opens fibers for better airflow, and leaves a professional appearance.
Question 7: Which portable extractor specification most directly indicates its ability to remove moisture from carpet?
- PSI (pounds per square inch) of water pressure
- Tank capacity in gallons
- Water lift (inches of water column) and CFM airflow (Correct answer)
- Heating element wattage
Correct answer: Water lift (inches of water column) and CFM airflow
Water lift measures vacuum strength and CFM measures airflow volume; together they determine how effectively moisture and soils are extracted from the carpet.
CCT Cleaning Methods & Equipment Usage 4
Absorbent compound cleaning uses a moist, absorbent carrier material.
After working it into the carpet, how is the compound and soil removed?