NYS Pesticide Commercial Operator (PCO) Certification Exam — Questions and Answers

Question 1: Read: 'Reimbursement requires original receipts; photocopies are accepted only when accompanied by a signed affidavit.' An employee submits photocopied receipts with a signed affidavit. What is the correct action?

Accept the submission because the affidavit satisfies the exception (Correct answer)
Hold the request until originals are found
Reject it because originals are always required
Accept only half of the reimbursement

Correct answer: Accept the submission because the affidavit satisfies the exception

The passage's stated exception allows photocopies when a signed affidavit accompanies them.

Question 2: In an IPM program, the 'action threshold' refers to:

The point at which pest activity becomes visible to humans
The legal pesticide application rate on the label
The pest population level at which control measures are economically or aesthetically justified (Correct answer)
The number of traps required per 1,000 sq ft

Correct answer: The pest population level at which control measures are economically or aesthetically justified

The action threshold is the pest density at which intervention becomes necessary to prevent unacceptable damage or health risk, guiding treatment decisions.

Question 3: A technician finds a pesticide label that conflicts with a supervisor's verbal instructions. What must the technician do?

Split the difference by reducing the rate
Follow the label, because the label is the law (Correct answer)
Follow the supervisor, because supervisors carry legal responsibility
Call the manufacturer before doing anything

Correct answer: Follow the label, because the label is the law

Using a pesticide in a manner inconsistent with its label is a violation of both federal and state law.

Question 4: After using a sprayer for a pesticide application, triple rinsing the equipment involves:

Adding water, agitating, spraying through the nozzle, and repeating three times (Correct answer)
Running three gallons of water through the pump
Rinsing the outside of the tank with a hose three times
Disassembling and hand-washing each part three times

Correct answer: Adding water, agitating, spraying through the nozzle, and repeating three times

Triple rinsing — filling with water, circulating through the system, spraying out, and repeating three times — removes pesticide residues from tank, hoses, and nozzles.

Question 5: What effect does increasing spray pressure have on nozzle output and droplet size?

Increases output and decreases droplet size, producing finer droplets more prone to drift (Correct answer)
Decreases output and increases droplet size
Has no effect on droplet size
Increases both output and droplet size equally

Correct answer: Increases output and decreases droplet size, producing finer droplets more prone to drift

Higher pressure forces more liquid through the orifice (increased GPM) and shatters the liquid into smaller droplets, increasing drift risk.

Question 6: All policy analysts in the bureau are required to file disclosure forms. Dana works in the bureau but has not filed a disclosure form. What can be validly concluded?

Dana is definitely a policy analyst
Dana filed the form late
Dana does not work in the bureau
If Dana is a policy analyst, Dana is out of compliance (Correct answer)

Correct answer: If Dana is a policy analyst, Dana is out of compliance

The rule applies only to policy analysts, so a violation can be concluded only if Dana holds that title.

Question 7: The NYS DEC Category 7A certification is specifically required for which type of pest control work?

Ornamental and turf pest control
Right-of-way pest management
Agricultural crop pest management
Structural pest control in and around buildings (Correct answer)

Correct answer: Structural pest control in and around buildings

Category 7A covers structural pest control, which includes pest management in residential, commercial, and industrial buildings.

Question 8: Under NYS regulations, pesticide application records must include all of the following EXCEPT:

The applicator's home address (Correct answer)
EPA registration number and rate applied
Target pest and pesticide product name
Date and location of application

Correct answer: The applicator's home address

Records must document the date, site, pest, product name, EPA number, application rate, and applicator certification number — not the applicator's personal home address.

Question 9: The American dog tick is a vector for which disease in New York State?

Lyme disease
Rocky Mountain spotted fever (Correct answer)
Babesiosis
Ehrlichiosis

Correct answer: Rocky Mountain spotted fever

The American dog tick (Dermacentor variabilis) is the primary vector of Rocky Mountain spotted fever in the eastern US.

Question 10: The IPM approach of using 'crack and crevice' applications rather than broadcast sprays is preferred because it:

Is only allowed in food-handling areas by law
Targets pest harborage directly while minimizing off-target pesticide exposure (Correct answer)
Complies with all pesticide label directions automatically
Uses less labor than broadcast applications

Correct answer: Targets pest harborage directly while minimizing off-target pesticide exposure

Crack and crevice applications concentrate pesticide where pests hide while dramatically reducing exposure to non-target organisms and surfaces.

Question 11: Alters the direction of the load's effort. Instead of pulling downward, you do so upward. It has a single wheel and a rope. The weight of the load determines how much force is necessary to lift it.

TRUE
FALSE (Correct answer)

Correct answer: FALSE

This description accurately details a fixed pulley, which changes the direction of the applied force but does not reduce the magnitude of force required to lift the load. The force needed to lift the load using a fixed pulley is equal to the load's weight (ignoring friction). Therefore, if the statement implies a reduction in the force necessary, it is false, as a fixed pulley only offers a mechanical advantage in direction, not force magnitude.

Question 12: Which label section lists the first aid measures for pesticide exposure?

Storage and Disposal section
Precautionary Statements — First Aid (Correct answer)
Environmental Hazards section
Active Ingredient declaration

Correct answer: Precautionary Statements — First Aid

The Precautionary Statements section of the pesticide label includes first aid measures that must be followed in case of exposure.

Question 13: After passing the PCO exam, a candidate's name is placed on an eligible list. How are candidates generally considered for appointment from that list?

Strictly first-come, first-served by application date
By seniority in state government only
In rank order by score, with agencies able to select from the top three scoring candidates willing to accept (Correct answer)
Randomly by lottery among all passers

Correct answer: In rank order by score, with agencies able to select from the top three scoring candidates willing to accept

New York's 'rule of three' allows appointment of any of the three highest-scoring willing candidates from the eligible list.

Question 14: The presence of shed skins (exuviae) and live insects in wall voids or along baseboards most likely indicates:

Silverfish activity
German cockroach infestation (Correct answer)
Termite activity
Flea infestation

Correct answer: German cockroach infestation

German cockroaches shed their skins (nymphal exuviae) multiple times during development, and finding shed skins alongside live insects in harborage areas is a classic sign.

Question 15: A pressure regulator on a power sprayer maintains:

Consistent operating pressure at the nozzle regardless of engine speed variation (Correct answer)
The chemical concentration in the tank
The flow rate of the chemical concentrate pump
The temperature of the spray solution

Correct answer: Consistent operating pressure at the nozzle regardless of engine speed variation

Pressure regulators compensate for engine speed fluctuations and tank pressure changes to deliver consistent operating pressure at the nozzle.

Question 16: Under New York's IPM requirements for schools, PCOs must prioritize which approach?

Immediate chemical treatment to protect children from all pests
Monthly scheduled pesticide applications regardless of pest levels
Non-chemical or least-toxic chemical methods first, with notification before pesticide use (Correct answer)
Only biological control methods, no chemical use allowed

Correct answer: Non-chemical or least-toxic chemical methods first, with notification before pesticide use

NY school IPM mandates a least-toxic, preventive approach with required pre-notification and documentation before any pesticide application.

Question 17: Which piece of equipment is used to measure nozzle output during sprayer calibration?

A refractometer
A pressure gauge alone
A graduated cylinder or collection container timed over 30–60 seconds (Correct answer)
A thermometer

Correct answer: A graduated cylinder or collection container timed over 30–60 seconds

Collecting and measuring nozzle output in a graduated cylinder for a timed interval determines actual GPM, which is the basis for calibration calculations.

Question 18: The purpose of agitation in a pesticide spray tank is to:

Remove air bubbles from the spray line
Keep the formulation uniformly suspended and mixed throughout the application (Correct answer)
Cool the spray solution during hot weather
Increase pump pressure

Correct answer: Keep the formulation uniformly suspended and mixed throughout the application

Continuous agitation prevents wettable powders, flowables, and emulsifiable concentrates from settling or separating, ensuring a consistent concentration in every spray pass.

Question 19: Which IPM concept describes the idea that some level of pests may be tolerable without requiring treatment?

Zero-tolerance policy
Biological control success rate
Pesticide resistance index
Tolerance threshold (or pest tolerance level) (Correct answer)

Correct answer: Tolerance threshold (or pest tolerance level)

The tolerance threshold recognizes that not every pest sighting requires treatment — control is only justified when pest levels exceed an economically or aesthetically acceptable level.

Question 20: An IPM inspection report for a commercial kitchen should document all of the following EXCEPT:

Location and extent of infestation
Conducive conditions and recommended corrective actions
The PCO's personal opinions about the kitchen staff (Correct answer)
Pest species identified

Correct answer: The PCO's personal opinions about the kitchen staff

IPM inspection reports document objective findings — pest ID, harborage locations, conducive conditions, and recommendations — not subjective personnel assessments.

Question 21: A small liquid pesticide spill occurs on a concrete floor. What is the correct response sequence?

Cover it with a tarp and finish the job first
Hose the spill into the nearest floor drain
Evacuate the county and call the fire department
Control the spill, contain it, then clean it up with absorbent material (Correct answer)

Correct answer: Control the spill, contain it, then clean it up with absorbent material

The 'three Cs' — control, contain, clean up — prevent the spill from spreading or reaching drains and waterways.

Question 22: A NY pesticide dealer must obtain a dealer registration from the NYS DEC if they sell:

Fertilizers with no pesticide content
General use pesticides only
Restricted Use Pesticides (RUPs) (Correct answer)
Any cleaning product containing disinfectants

Correct answer: Restricted Use Pesticides (RUPs)

Pesticide dealers selling Restricted Use Pesticides must be registered with the NYS DEC and maintain sales records for RUP transactions.

Question 23: Silverfish infestations are most commonly found in which environments?

Dry, hot attic spaces
Exposed outdoor wood
Refrigerated storage areas
High-humidity areas such as bathrooms and basements (Correct answer)

Correct answer: High-humidity areas such as bathrooms and basements

Silverfish thrive in high-humidity environments such as bathrooms, kitchens, and basements where they feed on starchy materials.

Question 24: You confirm bed bugs in one unit of an apartment building. What is the BEST next step?

Fumigate the entire building immediately
Treat only the reported unit and close the ticket
Inspect adjoining units above, below, and beside the infested unit (Correct answer)
Advise all tenants to discard their mattresses

Correct answer: Inspect adjoining units above, below, and beside the infested unit

Bed bugs spread through walls and along utility lines, so adjacent units must be inspected to define the true extent of the infestation.

Question 25: What is the purpose of a backflow preventer on a pesticide mixing and filling station?

To increase water pressure for mixing
To prevent pesticide-contaminated water from flowing back into the potable water supply (Correct answer)
To filter pesticide particles from the solution
To measure the volume of pesticide added

Correct answer: To prevent pesticide-contaminated water from flowing back into the potable water supply

A backflow preventer protects the public water supply from contamination if pressure drops cause siphoning of pesticide-laden water back through the hose connection.

Question 26: In New York State, which document must a PCO consult before making any pesticide application?

The manufacturer's website
A trade association newsletter
The Material Safety Data Sheet only
The pesticide label, which is a legally binding document (Correct answer)

Correct answer: The pesticide label, which is a legally binding document

Under FIFRA and NYS law, the pesticide label is a legal document and applicators are required to follow all label directions.

Question 27: What is pesticide drift?

The gradual loss of potency in storage
Movement of pesticide through the air away from the intended target site (Correct answer)
The movement of a pest population between buildings
Residue remaining on a surface after treatment

Correct answer: Movement of pesticide through the air away from the intended target site

Drift is airborne off-target movement of spray droplets or vapors, which can harm people, pets, and the environment.

Question 28: I wanted to 1 you that I have faced some problems when using the client database. Just one of my previous five questions 2 accurate. <br> Which of the following should go in position two the most? <br>

Is
Are
Has been (Correct answer)
Have been

Correct answer: Has been

The subject of the second blank is 'Just one of my previous five questions.' Since 'one' is a singular subject, the verb must also be singular. 'Has been' is the correct singular past participle form, indicating that only one question, out of the five, has been accurate up to the present moment.

Question 29: If a PCO must re-enter a treated area, what information on the pesticide label determines when safe re-entry is permitted?

The re-entry interval (REI) specified on the label (Correct answer)
The product's shelf life expiration date
The product's color and odor
The applicator's personal judgment

Correct answer: The re-entry interval (REI) specified on the label

The re-entry interval (REI) on the label specifies the minimum time that must pass after application before unprotected persons may enter the treated area.

Question 30: Which PPE component protects a PCO from dermal pesticide exposure when working with liquid concentrates?

Reflective vest
Cotton coverall
Chemical-resistant apron (Correct answer)
Wool jacket

Correct answer: Chemical-resistant apron

A chemical-resistant apron creates a physical barrier against splashes and spills of liquid pesticide concentrates.

Question 31: When applying a pesticide with a compressed air sprayer, proper technique requires maintaining the wand at:

Maximum reach distance at all times
A consistent distance from the surface to achieve uniform coverage (Correct answer)
Variable distances based on operator comfort
Direct contact with the surface

Correct answer: A consistent distance from the surface to achieve uniform coverage

Maintaining a consistent wand-to-surface distance ensures uniform droplet size, pattern width, and application rate throughout the treatment.

Question 32: What does the signal word 'DANGER' on a pesticide label indicate?

Moderately toxic
Minimal hazard
Slightly toxic
Highly toxic — LD50 is very low (Correct answer)

Correct answer: Highly toxic — LD50 is very low

'DANGER' indicates a highly toxic product with a very low LD50, meaning even small amounts can cause death or serious injury.

Question 33: Pesticide labels are legally binding under which federal law?

Toxic Substances Control Act
OSHA Hazard Communication Standard
FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act) (Correct answer)
Clean Water Act

Correct answer: FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act)

FIFRA makes the pesticide label a legal document; using a product inconsistently with its label is a federal violation.

Question 34: What is the maximum civil penalty per violation for an unlicensed person performing commercial pesticide applications in New York?

$500 per violation
$5,000 per violation (Correct answer)
$10,000 per violation
$250 per violation

Correct answer: $5,000 per violation

NYS DEC can impose civil penalties of up to $5,000 per violation for unlicensed pesticide application under Environmental Conservation Law.

Question 35: Which document must a commercial pesticide applicator have available during every application in New York?

A copy of the pesticide label and SDS (Correct answer)
A NYSDEC application permit
Only the SDS
A personal pest management plan

Correct answer: A copy of the pesticide label and SDS

Applicators must have the pesticide label and SDS available during every application to comply with federal FIFRA and NYS ECL requirements.

Question 36: What is the primary purpose of a pre-application site inspection before treating a structure?

To determine the customer's budget
To identify pest species, harborage areas, and conducive conditions (Correct answer)
To satisfy advertising requirements
To select the most expensive product

Correct answer: To identify pest species, harborage areas, and conducive conditions

A thorough pre-application inspection identifies the pest, its harborage, and conditions that support it, enabling an effective and targeted treatment plan.

Question 37: You receive a phone call from an angry member of the public about a decision made by another unit. The most professional first response is to:

Listen to the concern, then direct or transfer the caller to the correct unit with relevant information (Correct answer)
Tell the caller nothing can be done and end the call
Give your personal opinion that the other unit made a mistake
Promise the decision will be reversed

Correct answer: Listen to the concern, then direct or transfer the caller to the correct unit with relevant information

Listening and routing the caller correctly addresses the concern without overstepping your authority.

Question 38: Which stage of the cat flea's life cycle is latent until it receives a signal that the host is present?

Planula
Pupa (Correct answer)
Caterpillar
Nauplius

Correct answer: Pupa

The pupal stage of the cat flea is known for its dormancy and resilience. Flea pupae can remain in a quiescent state for extended periods, sometimes months, until environmental cues like vibrations, warmth, or exhaled carbon dioxide signal the presence of a potential host. This allows them to emerge when conditions are favorable for feeding and reproduction.

Question 39: Exclusion, as an IPM strategy, involves:

Applying pesticides along the perimeter
Using traps to capture and remove pests
Sealing entry points to prevent pest access to a structure (Correct answer)
Removing food and water sources

Correct answer: Sealing entry points to prevent pest access to a structure

Exclusion uses physical barriers — caulking, door sweeps, screens, mesh — to prevent pests from entering a structure.

Question 40: Which condition most increases the risk of spray drift during an outdoor application?

Cool overcast weather with large droplets
Early morning dew on the target surface
High wind speeds combined with small droplet sizes (Correct answer)
Application with coarse nozzles at low pressure

Correct answer: High wind speeds combined with small droplet sizes

Fine droplets stay suspended longer and wind carries them off-target, greatly increasing drift.

Question 41: Before entering a pesticide-treated area, a PCO should verify that the:

Wind speed exceeds 10 mph
Label has been discarded
Temperature is above 90°F
Re-entry interval (REI) has elapsed (Correct answer)

Correct answer: Re-entry interval (REI) has elapsed

The re-entry interval must have elapsed to ensure residues have dropped to safe levels before re-entry.

Question 42: Dermal absorption is a concern with pesticides primarily because:

Pesticides only harm skin on contact
Skin can absorb certain pesticides directly into the bloodstream (Correct answer)
Absorption through skin is slower than ingestion
Only organics can penetrate skin

Correct answer: Skin can absorb certain pesticides directly into the bloodstream

Many pesticides, especially organophosphates and carbamates, can penetrate intact skin and enter the bloodstream, causing systemic toxicity.

Question 43: A pesticide label states 'DANGER' as its signal word. What does this indicate?

The product is restricted-use only
The product is highly toxic or corrosive (Correct answer)
The product is moderately toxic
The product is slightly toxic

Correct answer: The product is highly toxic or corrosive

DANGER is the signal word for Toxicity Category I products, indicating high toxicity or severe eye/skin damage potential.

Question 44: Which symptom pattern is MOST consistent with organophosphate or carbamate overexposure?

Excessive salivation, tearing, pinpoint pupils, and muscle twitching (Correct answer)
A skin rash appearing two weeks later
Temporary loss of hearing
Dry mouth, dilated pupils, and hyperactivity

Correct answer: Excessive salivation, tearing, pinpoint pupils, and muscle twitching

These cholinesterase-inhibiting insecticides cause the classic SLUDGE symptoms, including salivation, tearing, and constricted pupils.

Question 45: When mixing pesticides, the correct order of addition to the spray tank is:

Fill with water completely → then add pesticide last
Mix pesticide and water in a bucket → then add to tank
Add concentrated pesticide first → then water to full volume
Fill tank halfway with water → add wettable powder or flowable → then remaining water (Correct answer)

Correct answer: Fill tank halfway with water → add wettable powder or flowable → then remaining water

Adding pesticide to a partially filled tank and filling with water while agitating prevents clumping and ensures proper suspension of the formulation.

Question 46: What factor most directly affects the droplet size produced by a spray nozzle?

Time of day the application is made
Label storage temperature requirements
Nozzle type, orifice size, and spray pressure (Correct answer)
Color of the pesticide formulation

Correct answer: Nozzle type, orifice size, and spray pressure

Nozzle design, orifice size, and operating pressure together determine droplet spectrum, which affects coverage, drift, and efficacy.

Question 47: For cockroach management under IPM in a New York restaurant, the FIRST recommended step is:

Thorough inspection to identify harborage sites and species (Correct answer)
Immediate broad application of a residual spray
Calling for a structural fumigation
Placing glue traps only

Correct answer: Thorough inspection to identify harborage sites and species

Inspection to locate harborage sites and confirm species identification is the essential first step before selecting targeted IPM tactics.

Question 48: When treating a multi-unit residential building in New York State, what notice must typically be provided to occupants prior to a pesticide application?

A 2-week notice sent by certified mail
No notice is required
A 48-hour written notice as required by NYS law for multi-family dwellings (Correct answer)
An annual disclosure at lease signing is sufficient

Correct answer: A 48-hour written notice as required by NYS law for multi-family dwellings

NYS law requires PCOs to provide a 48-hour advance written notice to occupants of multiple dwellings before applying pesticides inside their units.

Question 49: The 'pesticide treadmill' in pest management describes:

The process of rotating pesticide classes to prevent resistance
Calendar-based application schedules
The escalating cost of pesticide products
Over-reliance on chemicals that leads to resistance, requiring ever-stronger products (Correct answer)

Correct answer: Over-reliance on chemicals that leads to resistance, requiring ever-stronger products

The pesticide treadmill occurs when repeated use of the same chemistry selects for resistant populations, requiring higher doses or different products in a cycle.

Question 50: Which formulation releases pesticide gradually and is often chosen to extend residual control?

Fumigant gas
Emulsifiable concentrate applied at half rate
Microencapsulated (ME) formulation (Correct answer)
Contact aerosol

Correct answer: Microencapsulated (ME) formulation

Microencapsulated formulations enclose the active ingredient in tiny capsules that release it slowly over time.

Question 51: What is the purpose of an anti-drip device (check valve) on a sprayer nozzle?

To increase spray pressure at the nozzle
To adjust spray pattern width
To filter large particles from the solution
To stop liquid flow when pressure drops below the operating threshold, preventing drips (Correct answer)

Correct answer: To stop liquid flow when pressure drops below the operating threshold, preventing drips

Anti-drip check valves close when operating pressure falls, preventing uncontrolled chemical dripping between spray passes.

Question 52: Which rodent is identified by its blunt snout, small ears, and stocky body in New York pest control?

House mouse (Mus musculus)
Norway rat (Rattus norvegicus) (Correct answer)
Deer mouse (Peromyscus maniculatus)
Roof rat (Rattus rattus)

Correct answer: Norway rat (Rattus norvegicus)

The Norway rat has a stocky build, blunt snout, small close-set ears, and a tail shorter than its body length, distinguishing it from the slender roof rat.

Question 53: The Safety Data Sheet (SDS) Section 8 provides information on:

Physical and chemical properties
Regulatory information
Exposure controls and personal protective equipment (Correct answer)
Accidental release measures

Correct answer: Exposure controls and personal protective equipment

SDS Section 8 (Exposure Controls/Personal Protection) lists occupational exposure limits and required PPE for safe handling.

Question 54: Spray drift during outdoor pesticide applications is minimized by:

Using ULV equipment outdoors
Using larger droplet nozzles, reducing pressure, and applying when wind is 3–7 mph (Correct answer)
Applying at maximum pressure for faster coverage
Spraying during midday when wind is typically highest

Correct answer: Using larger droplet nozzles, reducing pressure, and applying when wind is 3–7 mph

Larger droplets are heavier and fall faster, reducing air carry; low pressure and low-drift nozzle types further minimize drift potential in the field.

Question 55: What is the FIRST action an applicator should take if a pesticide concentrate splashes into a coworker's eyes?

Apply a neutralizing chemical solution
Wait to see if irritation develops
Bandage the eyes and drive to a hospital
Flush the eyes with clean running water for at least 15 minutes (Correct answer)

Correct answer: Flush the eyes with clean running water for at least 15 minutes

Immediate and prolonged flushing with clean water is the standard first aid for ocular pesticide exposure.

Question 56: Backpack sprayer calibration for indoor pest control typically involves measuring output over:

The walking speed of the operator alone
The total tank volume only
A timed test of nozzle flow (GPM) at the target operating pressure (Correct answer)
The chemical label's maximum rate

Correct answer: A timed test of nozzle flow (GPM) at the target operating pressure

Accurate backpack calibration requires measuring actual nozzle output (GPM) at the specific operating pressure used during the job.

Question 57: When implementing IPM for bed bugs in a New York multi-unit building, the most critical non-chemical tactic is:

Spraying all units on a monthly schedule
Notifying only the affected unit
Inspecting all adjacent units and using heat treatment or mattress encasements (Correct answer)
Applying rodenticide bait stations

Correct answer: Inspecting all adjacent units and using heat treatment or mattress encasements

Bed bug IPM requires inspecting adjacent units to find the full extent of infestation and using heat or encasements as non-chemical complements to any chemical treatment.

Question 58: A PCO discovers a pesticide spill in a vehicle. The FIRST step is to:

Leave the vehicle and call 911 without assessing
Dilute with large amounts of water
Contain the spill and don appropriate PPE before cleanup (Correct answer)
Drive to the nearest facility immediately

Correct answer: Contain the spill and don appropriate PPE before cleanup

Containing the spill and putting on PPE before cleanup prevents further contamination and protects the PCO from exposure.

Question 59: In IPM, 'sanitation' as a control tactic specifically refers to:

Cleaning up pesticide residues after treatment
Using food-safe cleaning chemicals
Removing food, water, harborage, and waste that support pest populations (Correct answer)
Applying disinfectant sprays after pest control

Correct answer: Removing food, water, harborage, and waste that support pest populations

Sanitation eliminates the food, water, and shelter resources pests need to survive, making the environment inhospitable without any pesticide use.

Question 60: A candidate wants to work only in Albany. When completing the PCO process, what is the best way to reflect this preference?

Decline the exam and apply directly to agencies instead
Accept every canvass letter and negotiate location later
List every county to maximize the score
Indicate the desired geographic location(s) so canvass letters and interviews come only from that area (Correct answer)

Correct answer: Indicate the desired geographic location(s) so canvass letters and interviews come only from that area

Candidates select geographic preferences, and agencies canvass only those willing to work in the relevant location.

Question 61: A new procedure reduces processing errors but increases average processing time by 10%. Which additional fact would best justify keeping the new procedure?

Other agencies use different procedures
Employees prefer the old procedure
The old procedure was written five years ago
Correcting an error costs far more time than the 10% increase adds (Correct answer)

Correct answer: Correcting an error costs far more time than the 10% increase adds

If error correction costs exceed the added processing time, the net effect of the new procedure is positive.

Question 62: Resistance management in IPM recommends rotating pesticide products by their:

Price per gallon
Signal word on the label
Mode of action (IRAC group), not just product name or active ingredient (Correct answer)
Brand name only

Correct answer: Mode of action (IRAC group), not just product name or active ingredient

Rotating by mode of action (IRAC classification) prevents selecting for resistance to a single biochemical target, even when products have different names.

Question 63: Under NYS DEC rules, a commercial pesticide applicator must notify building occupants before an indoor application by:

Providing advance notice as required by the specific pesticide label and state law (Correct answer)
Posting a sign only at the entrance
No notification is required
Only notifying building owners, not occupants

Correct answer: Providing advance notice as required by the specific pesticide label and state law

NYS requires notification to occupants per pesticide label requirements and applicable state statutes including the School Notification Law for certain settings.

Question 64: The PCO examination is primarily used to fill which type of New York State positions?

Seasonal park ranger positions
Entry-level professional trainee positions across many state agencies (Correct answer)
Senior executive management positions
Skilled trades and maintenance positions

Correct answer: Entry-level professional trainee positions across many state agencies

PCO establishes eligible lists for entry-level professional and trainee titles in numerous state agencies.

Question 65: New York's Neighbor Notification Law primarily requires which of the following?

Advance notice to adjacent property occupants before certain commercial lawn pesticide applications in opted-in counties (Correct answer)
Written consent from all residents within one mile of any application
Notification to the EPA after every residential application
Posting in newspapers before agricultural spraying

Correct answer: Advance notice to adjacent property occupants before certain commercial lawn pesticide applications in opted-in counties

In counties that adopt the law, commercial lawn applications require 48-hour advance notice to abutting neighbors.

Question 66: What is the best way to stop foul-smelling house ants from entering a customer's home?

A perimeter spray (Correct answer)
Sanitation and exclusion
To remove breeding grounds
Bulb duster

Correct answer: A perimeter spray

Foul-smelling house ants, like odorous house ants, often forage indoors from outdoor nests. A perimeter spray creates a chemical barrier around the home's foundation, effectively preventing ants from crossing into the structure. While sanitation and exclusion are crucial long-term strategies, a perimeter spray provides immediate and effective control against existing outdoor ant populations attempting to enter the home.

Question 67: When disposing of empty pesticide containers in New York State, the required procedure is to:

Incinerate on-site
Return all containers to the manufacturer
Triple-rinse and puncture or crush before disposal (Correct answer)
Rinse once and place in regular trash

Correct answer: Triple-rinse and puncture or crush before disposal

NYS DEC requires triple-rinsing empty containers and rendering them unusable before disposal to prevent pesticide residue contamination.

Question 68: Which application technique is most appropriate for treating ant trails along a baseboard?

Directed residual spot or band treatment along the trail pathway (Correct answer)
Broadcast spray of the entire room
Soil injection
Space fog treatment

Correct answer: Directed residual spot or band treatment along the trail pathway

A directed residual treatment along ant trails places the pesticide exactly where ants will contact it, providing efficient control with minimal off-target exposure.

Question 69: If a sprayer is applying too much pesticide per 1,000 sq ft, the PCO should:

Add more water to the tank
Increase walking speed, decrease pressure, or switch to a nozzle with lower output (Correct answer)
Switch to a different chemical formulation
Increase pump pressure to dilute the chemical

Correct answer: Increase walking speed, decrease pressure, or switch to a nozzle with lower output

Reducing output per area requires increasing walking speed, reducing nozzle pressure, or using a lower-output nozzle to bring the application rate into label compliance.

Question 70: An applicator experiences pinpoint pupils, excessive salivation, and muscle twitching after using an organophosphate. These are symptoms of what?

Heat exhaustion
Anticoagulant toxicity
Pyrethroid skin sensitization
Cholinesterase inhibition poisoning (Correct answer)

Correct answer: Cholinesterase inhibition poisoning

Organophosphates and carbamates inhibit cholinesterase, producing the classic SLUDGE symptoms and pinpoint pupils.

Question 71: Under NYS regulations, pesticide application records must be retained for a minimum of how many years?

3 years (Correct answer)
5 years
1 year
7 years

Correct answer: 3 years

NYS DEC requires pesticide application records to be kept for a minimum of 3 years.

Question 72: Which respiratory protection is required when applying pesticides that produce fine aerosols in enclosed spaces?

No respiratory protection needed
Dust mask
NIOSH-approved respirator with appropriate cartridges (Correct answer)
Surgical mask

Correct answer: NIOSH-approved respirator with appropriate cartridges

NIOSH-approved respirators with the correct cartridges are required to protect against inhalation of aerosol droplets and vapors in enclosed spaces.

Question 73: A pesticide that controls pests only when they eat treated material is classified as which type?

Systemic repellent
Contact poison
Stomach poison (Correct answer)
Fumigant

Correct answer: Stomach poison

Stomach poisons must be ingested by the pest to be effective, as with many baits.

Question 74: What method of cockroach eradication is the most efficient?

Sanitation and harborage reduction (Correct answer)
Pesticide and trapping
To eliminate breeding sites
Exclusion and baiting

Correct answer: Sanitation and harborage reduction

Cockroaches thrive in environments with readily available food, water, and shelter (harborage). Therefore, the most efficient and sustainable method for cockroach eradication involves comprehensive sanitation to remove food sources and harborage reduction to eliminate their hiding and breeding spots. While other methods like baiting and pesticides are used, they are far less effective without addressing the underlying environmental factors that support cockroach populations.

Question 75: Which sentence is written most clearly and correctly for a professional report?

The committee, having reviewed, recommended the proposal two changes.
The proposal, it was reviewed by the committee, and they had went on to recommend changes, two of them.
The committee reviewed the proposal and recommended two changes. (Correct answer)
Reviewing the proposal, two changes was recommended by the committee.

Correct answer: The committee reviewed the proposal and recommended two changes.

The first option is concise, grammatical, and in active voice, unlike the wordy or ungrammatical alternatives.

Question 76: The presence of mud tubes along a foundation is a primary sign of which pest?

Carpenter bees
Powderpost beetles
Carpenter ants
Subterranean termites (Correct answer)

Correct answer: Subterranean termites

Subterranean termites construct mud tubes to maintain moisture and protect themselves as they travel between the soil and wood structures.

Question 77: A ULV (Ultra Low Volume) machine is used primarily for:

Foam applications in wall voids
High-volume residual spraying of surfaces
Subsurface soil injection treatments
Producing very fine aerosol droplets for space or fogging applications (Correct answer)

Correct answer: Producing very fine aerosol droplets for space or fogging applications

ULV machines produce extremely small droplets (< 50 microns) for airborne space treatments targeting flying insects in indoor or outdoor environments.

Question 78: Which type of fly is associated with filth breeding in garbage, feces, and decaying organic matter in New York food facilities?

Phorid fly
House fly (Musca domestica) (Correct answer)
Fruit fly (Drosophila spp.)
Drain fly

Correct answer: House fly (Musca domestica)

The house fly breeds in feces, garbage, and decaying organic matter and is a major vector for foodborne pathogens in food-handling facilities.

Question 79: Which of the following is the correct action if pesticide is ingested?

Induce vomiting immediately
Drink milk to neutralize the chemical
Call Poison Control (1-800-222-1222) and follow SDS guidance (Correct answer)
Wait and monitor symptoms at home

Correct answer: Call Poison Control (1-800-222-1222) and follow SDS guidance

Contacting Poison Control immediately and following SDS first-aid instructions is the correct protocol for pesticide ingestion.

Question 80: In the sentence 'The auditor's findings were corroborated by three independent sources,' the word 'corroborated' most nearly means:

Collected
Contradicted
Confirmed (Correct answer)
Concealed

Correct answer: Confirmed

To corroborate means to confirm or support with additional evidence.

Question 81: Which of the following is the primary structural difference between house mice droppings and rat droppings?

Rat droppings are black; mouse droppings are white
There is no reliable difference
Mouse droppings are capsule-shaped; rat droppings are spiral
Mouse droppings are small (~3-6mm) with pointed ends; rat droppings are larger (>10mm) (Correct answer)

Correct answer: Mouse droppings are small (~3-6mm) with pointed ends; rat droppings are larger (>10mm)

Mouse droppings are small (3–6 mm) with pointed ends, while Norway rat droppings are larger (up to 20 mm) and blunt-ended, which helps distinguish them in the field.

Question 82: Read: 'Agencies must submit quarterly reports no later than 15 days after each quarter ends, unless the deadline falls on a weekend, in which case the report is due the next business day.' A quarter ends June 30, and July 15 is a Saturday. When is the report due?

Monday, July 17 (Correct answer)
Friday, July 14
Saturday, July 15
Monday, July 31

Correct answer: Monday, July 17

Because the 15-day deadline falls on a Saturday, the passage moves the due date to the next business day, Monday July 17.

Question 83: What class of pesticide requires a Special Registration or Restricted Use classification in New York?

Products with a CAUTION signal word only
All pesticides sold in stores
Only herbicides
Products with high acute toxicity or environmental hazard (Correct answer)

Correct answer: Products with high acute toxicity or environmental hazard

Restricted Use Pesticides (RUPs) are classified due to high acute toxicity or significant environmental risk and may only be purchased and used by certified applicators.

Question 84: When applying a pesticide in a crack and crevice treatment, where should the nozzle be directed?

Into cracks, crevices, and voids where pests hide (Correct answer)
Toward ceiling corners only
At the center of the room
Onto all exposed surfaces

Correct answer: Into cracks, crevices, and voids where pests hide

Crack and crevice treatments target the harborage areas where pests live and breed, maximizing efficacy while minimizing human exposure.

Question 85: A report shows unit A completed 320 inspections, unit B completed 25% more than unit A, and unit C completed half as many as unit B. How many inspections did unit C complete?

160
240
200 (Correct answer)
400

Correct answer: 200

Unit B completed 400 inspections (320 × 1.25), so unit C completed 200 (400 ÷ 2).

Question 86: When a pesticide is accidentally splashed in the eyes, the FIRST action is to:

Flush eyes with clean water for 15–20 minutes (Correct answer)
Apply eye drops immediately
Cover the eye with a bandage
Call poison control before doing anything

Correct answer: Flush eyes with clean water for 15–20 minutes

Immediate flushing with clean water for 15–20 minutes removes the chemical and minimizes tissue damage before seeking medical help.

Question 87: How many meetings can a person plan in a single day at most?

6
8
7 (Correct answer)
5

Correct answer: 7

While there's no strict universal rule, scheduling more than 7 meetings in a single day often leads to reduced productivity and meeting fatigue. Constant context switching between numerous meetings can hinder deep work and preparation, making it challenging to maintain focus and effectiveness throughout the day. It's generally advisable to allow for buffer time and focused work periods.

Question 88: Which ant species is known for nesting in wall voids and electrical outlets, requiring special treatment strategies in NY?

Pavement ant (Tetramorium caespitum)
Leafcutter ant
Odorous house ant (Tapinoma sessile) (Correct answer)
Fire ant (Solenopsis invicta)

Correct answer: Odorous house ant (Tapinoma sessile)

Odorous house ants readily colonize wall voids and electrical outlets, making targeted baiting preferable to spraying which can scatter the colony.

Question 89: During transport, pesticide containers in a service vehicle should be secured where?

On the passenger seat for quick access
Next to the technician's lunch cooler
In a locked or secured compartment separate from the passenger area, food, and safety equipment (Correct answer)
Loose in the truck bed without restraint

Correct answer: In a locked or secured compartment separate from the passenger area, food, and safety equipment

Pesticides must be secured and separated from people, food, and PPE to prevent contamination and spills.

Question 90: When a PCO treats a property adjacent to a water body in New York State, what is the primary concern regarding pesticide application?

The property owner's landscaping preferences
Preventing pesticide runoff or drift from reaching and contaminating the water body (Correct answer)
Maximizing spray coverage to the water's edge
Ensuring the water body is treated simultaneously

Correct answer: Preventing pesticide runoff or drift from reaching and contaminating the water body

Pesticides entering water bodies can harm aquatic organisms and violate federal and state environmental regulations, so buffer zones and careful application are required.

Question 91: A power sprayer nozzle that produces a fan pattern is MOST appropriate for which type of application?

Misting nozzles for indoor space treatments
Cone nozzles for high-pressure soil injection
Foaming nozzles for void filling
Flat-fan nozzles for broadcast or band spraying on flat surfaces (Correct answer)

Correct answer: Flat-fan nozzles for broadcast or band spraying on flat surfaces

Flat-fan nozzles produce an even, flat spray pattern ideal for broadcast coverage of horizontal surfaces.

Question 92: Heat-related illness risk increases when PCOs wear full PPE because:

PPE causes dehydration directly
PPE restricts evaporative cooling and traps body heat (Correct answer)
Pesticides raise body temperature
PPE absorbs UV radiation

Correct answer: PPE restricts evaporative cooling and traps body heat

Chemical-resistant suits and respirators impede sweat evaporation, significantly raising the risk of heat stress during warm-weather applications.

Question 93: Eye protection rated for pesticide applications must meet which standard?

Standard sunglasses with UV protection
Industrial safety glasses only
ANSI Z87.1 chemical splash goggles or face shield (Correct answer)
Any safety glasses available on-site

Correct answer: ANSI Z87.1 chemical splash goggles or face shield

ANSI Z87.1-rated chemical splash goggles or face shields provide the proper protection against pesticide liquid and vapor reaching the eyes.

Question 94: Repeatedly using pesticides with the same mode of action against a pest population is most likely to cause what?

Development of pesticide resistance in the pest population (Correct answer)
Improved product performance over time
Conversion of the pesticide into a fertilizer
Permanent eradication of the species

Correct answer: Development of pesticide resistance in the pest population

Survivors of repeated identical treatments pass on resistance traits, so rotating modes of action is essential.

Question 95: A nozzle screen (strainer) in a spray system serves to:

Measure nozzle output flow rate
Increase spray pressure
Filter particles that could plug nozzle orifices (Correct answer)
Regulate the chemical concentration

Correct answer: Filter particles that could plug nozzle orifices

Nozzle screens filter out solid particles from the spray solution that would plug the small nozzle orifice and disrupt the spray pattern.

Question 96: When applying pesticides in a food-handling establishment, which area requires the most careful attention to avoid contamination?

Parking lots
Food preparation surfaces, utensils, and open food containers (Correct answer)
Office areas
Employee break rooms

Correct answer: Food preparation surfaces, utensils, and open food containers

Food preparation surfaces and open food containers can become contaminated during pesticide applications, creating serious health risks for consumers.

Question 97: A PCO identifies small, reddish-brown insects with a flattened oval body and a musty odor in a mattress seam. The pest is most likely:

Bed bugs (Cimex lectularius) (Correct answer)
Bat bugs
Fleas
Carpet beetles

Correct answer: Bed bugs (Cimex lectularius)

Bed bugs are reddish-brown, flat, oval insects that hide in mattress seams and produce a characteristic musty, sweet odor.

Question 98: Which piece of personal protective equipment (PPE) is MOST critical when applying organophosphate pesticides?

Leather gloves
Chemical-resistant gloves (Correct answer)
Latex examination gloves
Cotton work gloves

Correct answer: Chemical-resistant gloves

Chemical-resistant gloves are essential when handling organophosphates because they prevent dermal absorption of these highly toxic compounds.

Question 99: Carpenter bees differ from bumblebees primarily by having:

A fuzzy, banded abdomen
A shiny, hairless abdomen (Correct answer)
A longer stinger
Smaller size

Correct answer: A shiny, hairless abdomen

Carpenter bees have a smooth, shiny black abdomen while bumblebees have a fuzzy, yellow-and-black banded abdomen.

Question 100: NYS requires recertification credits (continuing education) for certified applicators on a cycle of every:

2 years
1 year
5 years
3 years (Correct answer)

Correct answer: 3 years

NYS DEC requires certified commercial applicators to complete the required recertification credits during each 3-year certification period.

NYS Pesticide Commercial Operator (PCO) Certification Exam

The New York State Pesticide Commercial Operator (PCO) certification exam, administered by the NYSDEC, tests applicants on pesticide safety, integrated pest management, application equipment and calibration, and NYS laws and regulations required for commercial pesticide application licensing.

Questions

35 min

Time Limit

70%

To Pass

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