REHS EXAM Question and Answer 2026 |
Comprehensive Study Pack with Detailed
Rationales | A+ Verified
• The A-weighted scale is most commonly used. It considers frequency, intensity ,
and impact level. -✓✓What scale is used when measuring noise in a sheet metal
shop?
• Photochemically. Naturally, as sunlight passes through oxygen molecules, and
by high voltage electricity (lightening). O + UV light -✓✓how is ozone created?
• It neutralizes it. It destroys the free available chlorine present without effecting
pH -✓✓What does sodium thiosulfate do to chlorine?
• 100 years. -✓✓how long does it take class A radioactive waste to degrade to a
safe level?
• In stairwells with poor ventilation -✓✓Where do you sample for radon in
schools?
• They are easily absorbed and have low penetrating ability. -✓✓What are the
characeristsics of alpha particles?
• Sulfer dioxide, nitrogen oxide, carbon monoxide, lead, particulate matter -
✓✓What are the criteria air pollutants?
• Electrostatic precipitater. Particles pass through an electrical field, are charged,
then are attracted to a plate. the particles then fall into a hopper. -✓✓How is
dust from a cement kiln cleaned?
• Compacted, six inches. Uncompacted, five feet. -✓✓how far can a fly penetrate
the soil?
, • Avoid ticks. Cover up and use repellant. Remove tick carefully and seek medical
attention. The cause is a spirochete Borrelia burgendorfi. -✓✓How do you
prevent Lyme disease?
• Temperatures associated with shipping, receiving, storage, preparation,
cooking, cooling, holding (hot and cold) and reheating. -✓✓What are the critical
control points in receiving and preparing chicken?
• It has been properly pasteurized. -✓✓What does it mean when milk tests
negative for phosphates?
• Removal of lead from gasoline -✓✓Why has there been a reduction in blood
lead levels?
• Every three to six months. -✓✓How often does the CDC recommend testing
blood lead levels in children who live in high risk areas?
• A slow sand filtration system. -✓✓What type of filtration system should be
implemented in a small community?
• A rapid sand filtration system. -✓✓What type of filtration system should be
implemented in a new town with a clear lake and a relatively clean stream?
• The German cockroach -✓✓What type of roach is most common in American
cities?
• Salmonella -✓✓What do roaches carry in their gut?
• Nothing. Freezing has no effect on toxins. -✓✓What happens to food toxins
when they are frozen.
• It inactivates the enzymes. Blanching celery, reduces the bacteria count. -
✓✓What is the purpose of blanching vegetables?
• Charcoal -✓✓What absorbs gases?
Comprehensive Study Pack with Detailed
Rationales | A+ Verified
• The A-weighted scale is most commonly used. It considers frequency, intensity ,
and impact level. -✓✓What scale is used when measuring noise in a sheet metal
shop?
• Photochemically. Naturally, as sunlight passes through oxygen molecules, and
by high voltage electricity (lightening). O + UV light -✓✓how is ozone created?
• It neutralizes it. It destroys the free available chlorine present without effecting
pH -✓✓What does sodium thiosulfate do to chlorine?
• 100 years. -✓✓how long does it take class A radioactive waste to degrade to a
safe level?
• In stairwells with poor ventilation -✓✓Where do you sample for radon in
schools?
• They are easily absorbed and have low penetrating ability. -✓✓What are the
characeristsics of alpha particles?
• Sulfer dioxide, nitrogen oxide, carbon monoxide, lead, particulate matter -
✓✓What are the criteria air pollutants?
• Electrostatic precipitater. Particles pass through an electrical field, are charged,
then are attracted to a plate. the particles then fall into a hopper. -✓✓How is
dust from a cement kiln cleaned?
• Compacted, six inches. Uncompacted, five feet. -✓✓how far can a fly penetrate
the soil?
, • Avoid ticks. Cover up and use repellant. Remove tick carefully and seek medical
attention. The cause is a spirochete Borrelia burgendorfi. -✓✓How do you
prevent Lyme disease?
• Temperatures associated with shipping, receiving, storage, preparation,
cooking, cooling, holding (hot and cold) and reheating. -✓✓What are the critical
control points in receiving and preparing chicken?
• It has been properly pasteurized. -✓✓What does it mean when milk tests
negative for phosphates?
• Removal of lead from gasoline -✓✓Why has there been a reduction in blood
lead levels?
• Every three to six months. -✓✓How often does the CDC recommend testing
blood lead levels in children who live in high risk areas?
• A slow sand filtration system. -✓✓What type of filtration system should be
implemented in a small community?
• A rapid sand filtration system. -✓✓What type of filtration system should be
implemented in a new town with a clear lake and a relatively clean stream?
• The German cockroach -✓✓What type of roach is most common in American
cities?
• Salmonella -✓✓What do roaches carry in their gut?
• Nothing. Freezing has no effect on toxins. -✓✓What happens to food toxins
when they are frozen.
• It inactivates the enzymes. Blanching celery, reduces the bacteria count. -
✓✓What is the purpose of blanching vegetables?
• Charcoal -✓✓What absorbs gases?
