Final REHS Exam Prep I

Which of the following is the most least likely to occur as a product of air pollution?

GI Problems

Rabies is caused by a…?

Rhabdovirus

Placental transfer of immunity is an example of…

Natural Passive

Which of the following is an example of simple asphyxiation?

Inert gas that displaces oxygen in the lung

Which is the process least likely to occur in a septic system?

Removal of BOD

T/F: The higher LD50 value of a compound, the more lethal it is.

False

12 ppb of a chemical is best represented as…?

12 ug/l

Natural Flocculation is…?

Oxygen introduction allows aerobic bacteria to grow and oxidize and clump together. The clumped up materials get heavier and is able to sink to the bottom of the tanks as SLUDGE.

The wastewater entering a publicly owned treatment works (POTW) is known as…?

Blackwater

The pumping water level is best defined as the distance from the top of the well to the…?

Water level from the start of a pump test to the end of the test.

Granular Activated Carbon (GAC) removes tastes and odors by…?

Adsorption

Which of the following is not true concerning Q-fever?

It is never transmitted person to person.

TLV can be defined as…?

Threshold Limit Value

Which of the following is the best definition of incidence rate?

Number of newly acquired disease.

Which of the following is not true of RBC in wastewater treatment?

It is a completely anaerobic process.

Bacteriostatic agents are those which…?

Don’t kill microbes but cease their multiplication.

In a swimming pool, hot tub or spa, action shall be taken when the combined chlorine exceeds…?

0.2 ppm

The microbiological water standards for swimming pools and wading pools are…?

Heterotrophic plate count and total coliform densities.

When open for use, a hot tub or spa, shall be under the supervision of…?

• A designated adult supervisor.

• An individual currently certified in standard first aid and CPR.

• A certified pool operator.

• ALL OF THE ABOVE.

In food that is inoculated with Staphylococcus aureus and left out…?

Microbes would grow exponentially.

What recovers suspended solids the most in sewage treatment?

Primary Settling

Disease from tapeworm — Refers to…?

Echinococcus

What is blacklight used for when inspecting a food establishment?

To detect rodent urine

What is indoor air quality dependent on when you open a window?

Indoor air, Outdoor air, and a mix of both of them.

Why would you add Sodium Thiosulfate into potable water?

You minimize chlorine in the water.

Chapter 52, Title 8 — Refers to…?

Core Activities

Venetians in Italy, came up with what modern concept — Refers to…?

Quarantine

When sickness multiplies — Refers to…?

Septic Simia

What is considered ‘spore forming’ — Refers to…?

C. Botulinum

Clams taken from dirty water and cleaned for sale, is referred to as…?

Depuration

Labs should be confirmed by…?

the NJDEP

Bacteria reproduces through what process…?

Fission

What is ‘Gram Stain Reaction’ test…?

Test that determines whether bacteria in a sample are gram-positive or gram-negative by observing how they react to a purple stain.

What is the ‘Rights to Know Survey’ ?

This refers people to hazardous things/items in a location.

What causes algae blooms?

Increase in Nitrogen & Phosphorous

Why might a construction worker see colonies of rats run around in their construction site?

A demolition has occurred that is destroying the homes of the rats.

What are 3 major air pollutants?

• Ozone

• Acid Gases

• Particulates

What does ‘TLV’ stand for?

Threshold Limiting Value

What does the term ‘Fomite’ refer to?

Objects or materials that carry infection.

Ex: If you have covid, sneeze on your hand, touch the blue box. The box is fomite. These items are called Fomites.

Can Hepatitis A multiply in Food and Water?

No, it cannot.

Hepatitis A only multiplies in living things.

Are there state regulatory levels of Tobacco Smoke?

No, there are no state regulatory levels for Tobacco Smoke.

Is ‘Polio’ a virus?

Polio is a virus.

Does a virus multiple in dead things?

A virus does not multiple in dead things.

Ex. of Virus: Hep A & Polio

‘Campylobacter’ does not relate to…?

Undercooked Beef.

What is the best source of protection from radioactivity?

Lead

How is the concentration of radon measured?

PCi/l

Which of the following causative agents of the genus Plasmodium most dangerous (fatal) cause of malaria?

Falciparum

A truck carrying molasses crashes and its contents are emptied into a lake. This causes a fish kill. What is the likely reason for the death of the fish?

Decrease in the DO due to increased BOD activity by bacteria.

What is the acidic range of pH?

0 to 6.9

What is a neutral pH?

7

TOC refers to…?

Total Organic Compound

What is an example of a non-point source of pollution?

Residential run off

Every how often does a pool need to log in their pool systems?

2 hours

What is the minimum of no diving measure (in feet) in public pools?

5 feet and below

Where would you take pool samples?

Deepest part and away from the skimmers.

T/F: Flocculation is defined as the binding of particles together.

True

The death rate that refers to all causes of death is…?

Crude Death Rate

Legionnaires disease is…?

An acute bacteria disease with a high attack rate.

Which of the following are not zoonotic to humans?

Cutaneous Anthrax

T/F: The higher the LD50 value of a compound, the more lethal it is.

False

What are 2 waterborne protozoans are NOT killed by chlorine?

Giardia and Crysptosporium

Rota virus is most likely to affect what age group?

Young children and infants

12 ppl of a chemical is best represented as…?

12 ug/l

The reason for having air moving and ventilation in a manufacturing plant is…?

To prevent build up of vapors and gases

Organisms which grow at low temperatures are…?

Psychrophilic

PERC test is…?

Determines porosity of soil via ground adsorption factor

What is ‘Natural Flocculation’ ?

Oxygen introduction allows aerobic bacteria to grow and oxidize and clump together. The clumped up materials get heavier and is able to sink to the bottom of the tanks as SLUDGE.

Process which turns highly volatile and reactive raw organic solid matter into stable organic matter …?

Digestion of Sludge

The series of pipes that waste is flushed through. Water must travel 2 feet per second or it becomes septic…

Sanitary Sewer System

Activated sludge, trickling filters, oxidation ponds, RBCs are known as…?

AEROBIC

Sludge dissections, methane production, septic tanks, and composting are known as…?

ANAEROBIC

Measurement of oxidation reduction potential by bacteria. Measured the dissolved oxygen level of waste water that would be used up by bacteria during aerobic oxidation.

Biological Oxygen Demand

The detention time for wastewater in a septic tank is recommended to be…?

24 to 72 hours

One of the most important factors contributing to disease transmission of microbiological agents is…?

Concentration or dose of microorganisms

Which of the following is now an explosive component of sewer gas?

Carbon Dioxide

Facultivebacteria….?

Live under both aerobic and anaerobic conditions

The sand filter is used to…?

Remove suspended solids from water

Remove bacteria from water

The distance between field lines or tiles must be a minimum of ____ in a treatment absorption field arrangement…?

3 feet

Coagulant formation, particle stabilization, interparticle collision are known as…?

3 steps in coagulation-floculation

Most commonly used bacterial indicator?

Coliform

Physical processes transforms smaller particles into larger particles…?

Coagulation - flocculation

Which of the following is a biological treatment process?

RBC

Bacteriostatic agents are those which…?

Don’t kill microbes but stop their multiplication

Mottling is best described as…

The effect of water on soil particles

An example of point source pollution…?

Underground storage tank

Loamy soil contains which of the following?

Sand, silt, clay

The microbiological water standards for swimming pools and wading pools are…?

Heterotrophic plate count and total coliform densities.

What is the significance in a PERC test?

Proper location and design of a septic system

What is the main significance of proper location and design of septic system?

Protection of the water supply

Useful gas-by-product in sewage treatment is generated in which of the following processes?

Anaerobic digestion-methane gas

In food that is inoculated with staphylococcus aureus and left out…?

The microbe would adjust prior to rapid growth

Which of the following are examples of surface water qualify tests?

BOD

DO

Microbial Tests

What recovers suspended solids the most in sewage treatment?

Primary Settling