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HSPA 9th Edition Chapters 7-9 Crcst
Exam Questions And Answers 2025
Biocide-correct-answer-A substance or microorganism that kills or controls the
growth of living organisms
Critical water goes through...-correct-answer-a carbon bed, softening, and reverse
osmosis. Followed by deionization or distillation
Reverse osmosis-correct-answer-water purification process where impurities are
removed from water using a semipermeable membrane
Deionized water-correct-answer-water that has all ions removed through an ion
exchange process
Distilled water-correct-answer-water that is heated to steam, then allowed to cool
and condense
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What are the first 7 pH levels?-correct-answer-0-battery acid
1-hydrochloric acid from stomach lining
2-lemon juice & vinegar
3-grapefruit and orange juice, soft drink
4-tomato juice
5-acid rain & black coffee
6-urine & milk
7- "pure" water
What are the last 7 pH levels?-correct-answer-8-baking soda
9-toothpaste
10-milk of magnesium
11-household ammonia
12-soapy water
13-bleaches, oven cleaner
14-liquid drain cleaner, caustic soda
Brushes for cleaning usually have-correct-answer-nylon bristles
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What is instrument air?-correct-answer-compressed air that has had dust, dirt
and other pollutants removed.
Ultrasonic cleaners are used for-correct-answer-fine cleaning to remove soil from
joints, crevices, lumens and other difficult areas
Cavitation-correct-answer-low-pressure bubbles collapse and dislodge soil from
instruments
What is the correct solution temperature for an ultrasonic?-correct-answer-
between 80-109 degrees Fahrenheit (27-43C)
These items can't go in an ultrasonic cleaner-correct-answer-chrome-plated and
ebonized instruments. Plastic, cork,glass, wood, chrome or rubber. No needles or
fiber optic components
This cannot be mixed with stainless steel in a sonic...-correct-answer-aluminum,
brass, or copper
HSPA 9th Edition Chapters 7-9 Crcst
Exam Questions And Answers 2025
Biocide-correct-answer-A substance or microorganism that kills or controls the
growth of living organisms
Critical water goes through...-correct-answer-a carbon bed, softening, and reverse
osmosis. Followed by deionization or distillation
Reverse osmosis-correct-answer-water purification process where impurities are
removed from water using a semipermeable membrane
Deionized water-correct-answer-water that has all ions removed through an ion
exchange process
Distilled water-correct-answer-water that is heated to steam, then allowed to cool
and condense
,2|Page
What are the first 7 pH levels?-correct-answer-0-battery acid
1-hydrochloric acid from stomach lining
2-lemon juice & vinegar
3-grapefruit and orange juice, soft drink
4-tomato juice
5-acid rain & black coffee
6-urine & milk
7- "pure" water
What are the last 7 pH levels?-correct-answer-8-baking soda
9-toothpaste
10-milk of magnesium
11-household ammonia
12-soapy water
13-bleaches, oven cleaner
14-liquid drain cleaner, caustic soda
Brushes for cleaning usually have-correct-answer-nylon bristles
, 3|Page
What is instrument air?-correct-answer-compressed air that has had dust, dirt
and other pollutants removed.
Ultrasonic cleaners are used for-correct-answer-fine cleaning to remove soil from
joints, crevices, lumens and other difficult areas
Cavitation-correct-answer-low-pressure bubbles collapse and dislodge soil from
instruments
What is the correct solution temperature for an ultrasonic?-correct-answer-
between 80-109 degrees Fahrenheit (27-43C)
These items can't go in an ultrasonic cleaner-correct-answer-chrome-plated and
ebonized instruments. Plastic, cork,glass, wood, chrome or rubber. No needles or
fiber optic components
This cannot be mixed with stainless steel in a sonic...-correct-answer-aluminum,
brass, or copper
