REHS/RS NEHA Study Guide - Revised August 2019

When gas pipe is leaking, what methods would be used by the technician to identify the exact point of leakage?

Using soap bubble solution

What is the graphic tool used by meteorologists to give a succinct view of how wind speed and direction are typically distributed at a particular location

Wind Rose

What is the lowest portion of Earth's atmosphere called:

troposphere (a height of about 3.7-6.2 miles (6-10 km)

What three viruses cause the largest number of known

cases of illness through contaminated food:

Hepatitis, Rotavirus, Norovirus

Shellfish poisoning is caused by a group of toxins produced by:

planktonic algae (dinoflagellates, in most cases)

What is the most widely accepted detection method for the saxitoxins (Paralytic Shellfish Poisoning) around the world:

mouse bioassay (not as useful in Diarrhetic Shellfish Poisoning or Neurotoxic Shellfish Poisoning)

Pufferfish (also called "fugu" or "blowfish") are thought of as a delicacy - even though they contain this toxin:

tetrodotoxin (in some types of pufferfish, some of the organs like the liver and skin contain tetrodotoxin; in some pufferfish the toxin is in the meat also; and some have no toxin at all)

Compounds that cause neurological symptoms such as profuse sweating, coma, convulsions, hallucinations, excitement, depression, spastic colon

Neurotoxins

Compounds that produce rapid, transient nausea, vomiting, abdominal cramping, and diarrhea:

gastrointestinal irritants

mushrooms in this category generally are nontoxic and produce no symptoms, unless alcohol is consumed within 72 hours after eating them, in which case a short-lived, acute toxic syndrome is produced:

disulfiram‐like toxins

This is is a human illness caused by consumption of some subtropical and tropical marine finfish

Ciguatera fish poisoning (caused by consumption of subtropical and tropical marine finfish that have accumulated ciguatoxins through their diets)

Powdered infant formula is not sterile, and its nutrients provide good conditions for the growth of

Cronobacter (after reconstitution)

Travelers diarrhea is caused by which E. Coli (acronym)?

ETEC (Enterotoxigenic Escherichia coli)

Cholera is caused by which bacteria

Vibrio (but not all Vibrio cause cholera)

Q fever is caused by which food borne illness causing bacteria

Coxiella burnetii (the CDC has declared it a Category B potential bioterrorism agent)

Plant FOODS that are cooked for hot holding shall be cooked to a temperature of

135F

How long must POULTRY, BALUTS, wild GAME ANIMALS (as specified under Subparagraphs 3-201.17(A)(3) and (4)), stuffed FISH, stuffed MEAT, stuffed pasta, stuffed POULTRY, stuffed RATITES, or stuffing containing FISH, MEAT, POULTRY, or RATITES be cooked at 165F?

instantaneous

Fish to be served raw must be frozen how cold for how long? (except some Tuna and aquaculture fish)

-4F for 7 days, -31 for 15 hours, frozen to-31F until solid then stored -4°F for 24 hours

If immersion in hot water is used for SANITIZING in a manual operation, the temperature of the water shall be maintained at

171F or above

Total alkalinity of swimming pools shall be maintained in the range of:

60-180 ppm (mg/l)

the thick-walled, environmentally resistant structure released in the feces of infected animals that serves to transfer the infectious stages of sporozoan parasites (e.g., Cryptosporidium) to new hosts.

Oocyst

Milligrams per Liter (mg/L) is the equivalent metric measure to:

parts per million (ppm)

liable to ignite spontaneously on exposure to air

Pyrophoric

"RATITE" means

a flightless bird such as an emu, ostrich, or rhea.

Which organization requires cover for baking dough

BISSC (Baking Industry Sanitation Standards Committee)

The Registered Sanitarians are first and foremost:

Educators

Common microorganism associated with skin rash in whirlpools?

Pseudomonas aeruginosa

Complaining of extreme eye irritation by swimmers in a swimming pool may be:

Improper pH value

Workers in dental care may receive:

Mercury Vapor poisoning

Most accidents that occur in the home to infants aged 1-4 is caused by:

Walking/falling

Most accidents around swimming pools:

Drowning

Which can adversely effect the nerve cell?

Neurotoxin

This is usually found with Salmonella, caused by contaminated chicken source. High rate of infection:

Campylobacter jejuni

What is the most enteric disease:

Norwalk virus

The LEAST amount of backfill over the absorption field should be:

12-18 inches

Best method to avoid UST (Underground Storage Tank)problems:

Prevent corrosion

Filters will:

Reduce stray radiation

Swimmers ear is caused by:

Pseudomonas

A principle for effective radiation protection:

distance, time, shielding

Radiation could scatter and bounce off the

wall, floor, ceiling

Know characteristics of alpha particles

Are they made of protons & neutrons? Yes

Is absorbed the most matter? No

Do they have a high penetration rate? No

Which test is initially used if water is suspected of contamination with fecal matter?

FECAL coliform.

Which one is the correct sequence?

Coagulation-flocculation-sedimentation-filtration

The minimum retention time recommended for a septic tank is:

24 hours

Which filter is BEST to use for small communities in developing areas and in rural locations?

Slow sand filter

Which filter is BEST for removal of Giardia cysts from low turbidity water

Slow sand filter

Microbial pollution travels only a short distance through:

Smooth clay

Backsiphonage may be prevented by all of the following methods except:

Hydrostatic loops

Which of the following is NOT REQUIRED at a water treatment plant?

A Pre-incident Plan

Giardia is classified as a

protozoa

Entamoeba Histolytica is a

Protozoa

Which is the preferred field test for a water system (for residual chlorine)?

DPD

Which is the measurement of the amount of light scattered by particles suspended in water test sample?

Nephelometric Turbidity Units (NTU)

Which is transmitted by food or water?

Hepatitis A

What is another name for swimmer's itch?

Schistosoma spp

High concentrations of Nitrates in drinking water are:

A possible cause of methemoglobinemia (Blue Baby Syndrome)

Well head protection?

casing, cap and surface seal

If a water sample is chlorinated:

Use a bottle with Sodium Thiosulfate (acts as a dechlor)

Water sampling technique when transporting to the lab?

sterile glass or plastic bottle is the most important (also using the right preservative is important)

Which steps are correct in stream cleaning?

Stream pollution (organic) is apparent along its length by a Zone of Degradation (just below the source), the Zone of Active Decomposition, and the a Zone of Recovery or Self-Purification. O2 decreased in Zone of Degredation suspended solids increased and sludge on the stream bottom.

Emergency water treatment?

Boil for 1 minute. (100 degrees Celsius is 212 degrees Fahrenheit). Also can add suggested amount of chlorine per gallon of water and let sit for 30 minutes. Can also use 8 drops of iodine tincture per quart of water. Can also use 1 tsp of bleach per gallon of water

The composition of soil under an OSS drainfield is very important in the removal of both viruses and bacteria. Which of the following soil conditions is most favorable for removal of viruses?

Fine loamy sand over course sand or gravel

NTU are most commonly used to?

Determine turbidity

What causes water hardness?

Minerals (Dissolved calcium and magnesium bicarbonates, sulfates, and chlorides)

Water containing Nitrates generally indicates?

Evidence of agricultural pollution (Note: Ammonia in the water comes from decomposition of organic matter and is evidence of fresh water pollution.)

Microbial pollution only travels a short distance through:

Sandy loam or clay (most dense soil type)

which of these techniques is used to properly seal a drilled well to prevent contamination of the water supply?

Grouting

One of the most common reasons for the contamination of the water supply coming from a drilled well through rock, clay or hardpan is;

Failure to seal the well casing properly, improper grouting

The flushometer valve is typically protected by?

A non-pressure type vacuum breaker

A physical cross connection?

Is a connection which may permit/allow the flow from an unapproved (non-potable, ie. sewer) water supply into a potable (approved) water supply.

Which type of filter is best to use to strain/remove amoebic cysts?

Diatomaceous Earth Filter, Slow Sand and/or Cartridge

What makes water have a color?

Dissolved Solids

The importance of surveys for new well water?

determine the safety and adequacy of the water supply

Lime can be used to treat high concentrations of:

contaminants

Which one is best used to remove/control color, taste, and odor?

GAC-granular activated carbon filter

Which type of filtration method is the least effective?

Rapid sand filter

What are the four characteristics of hazardous wastes?

TIRC - toxic, ignitable, reactive, and corrosive

Most institutions are?

Their own communities

the importance of a ground fault interrupter?

Automatically shut off the electric power at the source

What is the most common type of injury that occurs at home?

Falling (children 1-4)

For fire safety requirements a room must have:

Dual Egress

Asbestos found in older homes

Found in homes built in and before the 1970's (found in floor tiles and acoustic plaster ceiling when it deteriorates.)

The drain line of an ice machine should connect to the sewer system through:

An open receptacle with an air gap

Vent gasses from a coal-burning furnace combined with high moisture create:

sulfuric acid

What is the importance of a P-Trap plumbing devise?

prevents air from traveling back from the sewer line into the house

The chimney should be how high above the home?

3 feet above a flat roof or 2 feet above the tallest part of a peaked roof or wall parapet.

In tattooing which is least important?

Single dye ??

Minimum wash temperature for hospital laundry is?

160 degrees

Which one is associated with water percolation?

Permeability

The majority of nasocrominal infections can be prevented by:

Hand washing

What is a biohazard?

A material of biological composition, especially if infective, that constitutes a threat to people or their environment.

The biosafety containment level suitable for work involving agents of moderate potential hazard to personnel and the environment is:

Biosafety Level 2

What are the minimum requirements for a house?

A) Sleeping rooms less than 40 sq ft B)living rooms less than 300 sq ft C) 1.5 people per bedroom (if one answer is 1.2 person per room choose that as the answer because it is not a min requirement (overcrowding in a bedroom - minimum is >or=2xbed+2)?)

Temporary residence?

Sleeping area of 40 sq ft

Travel trailer parks?

Roads a minimum of 18 feet wide, maximum 25 trailer spaces per acre, trailers 10 feet apart (Answer: all of the above)

Exposure to formaldehyde can cause

Irritation to the respiratory passage, contact dermatitis, disturbed sleep (all is the answer)

Muerto Canyon Virus (MCV) is a hantavirus mainly carried by:

Deer Mice

The best humidity for a home:

40%-60%

Building residents complaining of headache, lethargy, nausea, drowsiness

Carbon Monoxide (CO)

Lead absorbed how many more times in children than compared to adults?

5 times more