PH week 11-14

What is a generally minimum pH for growth and toxin produciton by Clostridium botulinum and other foodborne patogens?

4.5

SF/ANSI 42 Aesthetic Effects, a filter rated Class I for chlorine removal removes what percentage of chlorine from the water being filtered?

75% or greater chlorine removal.

The aw of a food product reflects which of the following?

Amount of water available.

All of the home treatment technologies discussed in class preform better with which technology being used for pretreatment?

Carbon filters

Which agency regulates home drinking water technologies?

FDA

Foods that have been altered due to the carefully controlled growth of microorganisms are called

Fermented

Foodborne intoxication is also commonly called:

Food poisoning.

Which of the following organisms may grow at pH 3.5?

Fungi and lactic acid bacteria

Of the water treatment technologies listed below, which one is the most commonly encountered home water filter in use today?

Granulated activated carbon filters

Which of the following microorganisms associated with food poisoning thrives in cold storage?

Listeria monocytogenes

When reading your federally mandated "water quality consumer confidence report" which value is the most important as it states the required minimum values under the "Clean Water Act" for water quality and safety?

MCL

What is the advantage of solid block carbon filters over granulated activated carbon filters?

Mechanical straining and chemical bonding.

Which form of nitrogen is most soluble and results from the process of nitrification?

Nitrate

Which treatment technology discussed is NOT commonly used in home drinking water treatment units?

Ozonation

Choose the most important job of a water utility:

Protecting public health by ensuring that water is safe to drink and use.

Food that is altered resulting in undesirable consequences is called:

Spoiled

Bottled water sold as "Spring Water" must meet which criteria listed below by the regulatory agency?

Spring water must flow naturally to the surface from an underground aquifer.

Which of the following organisms can grow at a lower water activity than most spoilage bacteria?

Staphylococcus aureus

When a water utility delivers treated water to the public, the water travels to the public though:

The water system infrastructure that exists as a series of connected pipes.

As a home owner with a well as your water source, which needs to be tested annually?

Total coliforms and arsenic

Which of the following is a type of ionizing radiation?

Ultraviolet light (UV)

Consumer Confidence Reports contain lists of regulated contaminants, unregulated contaminants and secondary constituents. Which one is regulated by individual states?

Unregulated contaminants

As discussed in class the CDC recommends which type of technology while hiking, camping, and traveling?

Water purifiers

Based on the discussion in class, who is responsible for ensuring that well water is safe to drink annually?

You, the home owner.

Which of the following are the primary decomposers of dead organic matter?

bacteria and fungi.

Which of the following human diseases can be transmitted from animals to humans by consuming contaminated milk?

brucellosis and tuberculosis

Which of the following methods of preserving food is considered commercial sterilization?

canning

From class based on mandated "Water Quality Consumer Confidence Reports" for public water supplies, which of the items listed below reacts with organic solids to form THMs (trihalomethanes)?

chlorine

Sugar and salt act as preservatives by

drawing water out of food.

Which of the following is not considered an extrinsic factor for food spoilage?

ethanol content

All bottled water companies create "Sparkling" water by adding CO2 to purified water (much like a soda stream) and then sell it to consumers commercially as sparkling water. This is allowed under federally regulated guidelines.

false

Natural environmental events which can harm public health include the release of radioactive materials from a nuclear power plant.

false

The major effect of excess water in the soil is:

lower oxygen levels.

Which of the following is NOT part of the production of wine?

malting

The activity of microbes during fermentation can perform all of the following functions EXCEPT:

neutralize toxins.

In 2020 the EPA published the final regulation "Use of Lead Free Pipes, Fittings, Fixtures, Solder and Flux for drinking water." This new rule will reduce lead in drinking water for:

new home construction.

Nutrient poor waters are described as being:

oligotrophic

The EPA defines a public water system as:

provides water for human consumption through conveyances (such as pipe, ditch or hose) to at least 15 service connections or regularly serves at least 25 individuals.

Which of the following is most likely to grow at refrigerator temperatures?

psychrophiles

On which of the following foods can Staphylococcus aureus multiply with little competition?

salty ham

The fungus Aspergillus oryzae is involved in the production of

soy sauce.

Which form of sulfur is most useable by plants?

sulfate.

All of the following factors would increase the chances of food spoiling EXCEPT:

the production of benzoic acid.

Complex disasters result when a natural disaster escalates an ongoing crisis. For example the heating and water shortages and housing damage caused during the 2021 winter storms in Texas.

true

Factors or conditions in the environment that increase the risk of human injury, disease, or death are environmental hazards.

true

With the thinning of the stratospheric ozone layer the quantity of UV-B radiation reaching the earth has been increasing.

true

Sulfur dioxide is added in the production of ______________.

wine

In the brewing process, the sugar and nutrient extract obtained by soaking germinated grain in warm water is called:

wort.