Certified Grounds Manager (CGM) — Questions and Answers

Question 1: What is the recommended action before allowing workers to re-enter a treated area after pesticide application?

Wait until the treated area is dry to the touch
Post a sign for 24 hours regardless of product used
Observe the pesticide label's Re-Entry Interval (REI) (Correct answer)
Wait until the spray equipment has been cleaned and stored

Correct answer: Observe the pesticide label's Re-Entry Interval (REI)

The Re-Entry Interval (REI) stated on the pesticide label is a legal requirement that must be followed before workers re-enter treated areas.

Question 2: Which document outlines the detailed scope of work and performance standards for a contracted grounds service?

Specification sheet (Correct answer)
Depreciation schedule
Purchase order
Budget variance report

Correct answer: Specification sheet

A specification sheet defines exactly what work must be performed, how it must be performed, and the standards the contractor must meet.

Question 3: What is the primary risk of consistently underbidding a grounds maintenance contract to win business?

Winning too many contracts
Losing access to equipment suppliers
Gaining excess profit margin
Inability to deliver the required quality or scope without financial loss (Correct answer)

Correct answer: Inability to deliver the required quality or scope without financial loss

Underbidding means revenues will not cover costs, forcing the contractor to cut corners or absorb losses to honor the contract.

Question 4: How often should equipment be sterilized or disinfected?

Once per shift
Between each patient use according to manufacturer guidelines (Correct answer)
Only when visibly soiled
Weekly during routine maintenance

Correct answer: Between each patient use according to manufacturer guidelines

Equipment must be sterilized or disinfected between each patient use following manufacturer guidelines to prevent cross-contamination and ensure patient safety.

Question 5: A landscape manager discovers that a newly planted tree is exhibiting interveinal chlorosis on young leaves. The most likely nutrient deficiency is:

Calcium
Nitrogen
Iron (Correct answer)
Phosphorus

Correct answer: Iron

Iron deficiency causes interveinal chlorosis (yellow tissue between green veins) on young leaves, common in high-pH soils that limit iron availability.

Question 6: When conducting a catch-can test on a turf irrigation system, what is being measured?

The uniformity and precipitation rate of sprinkler coverage (Correct answer)
Soil pH across the irrigated zone
Evapotranspiration rates over a 24-hour period
Root depth of the turfgrass

Correct answer: The uniformity and precipitation rate of sprinkler coverage

A catch-can test places containers throughout a zone to collect applied water, revealing distribution uniformity and the actual precipitation rate delivered.

Question 7: Why is trend analysis valuable in monitoring?

It requires too much data to be practical
It is only useful for historical documentation
It only applies to financial metrics
It reveals patterns that predict future issues before they become critical (Correct answer)

Correct answer: It reveals patterns that predict future issues before they become critical

Trend analysis reveals patterns in system behavior that can predict future issues, enabling proactive intervention before problems impact users.

Question 8: Which federal agency administers the National Pollutant Discharge Elimination System (NPDES) permit program?

U.S. Fish and Wildlife Service
USDA Natural Resources Conservation Service
Army Corps of Engineers
U.S. Environmental Protection Agency (Correct answer)

Correct answer: U.S. Environmental Protection Agency

The EPA administers the NPDES permit program established under the Clean Water Act, which regulates point source discharges of pollutants into U.S. waters.

Question 9: Which budgeting method requires grounds managers to justify every expense from zero each fiscal year?

Rolling budget
Incremental budgeting
Zero-based budgeting (Correct answer)
Capital budgeting

Correct answer: Zero-based budgeting

Zero-based budgeting requires justifying all expenses from scratch each budget cycle rather than basing them on prior year spending.

Question 10: What is the correct first aid response if a worker gets a pesticide concentrate splashed into their eyes?

Apply a neutralizing solution immediately
Rinse once and check SDS before deciding next steps
Flush with clean water for at least 15 minutes and seek medical attention (Correct answer)
Cover the eye and wait to see if irritation develops

Correct answer: Flush with clean water for at least 15 minutes and seek medical attention

Eyes exposed to pesticides should be flushed continuously with clean water for a minimum of 15 minutes, then the worker should receive medical evaluation.

Question 11: Which maintenance practice best controls annual bluegrass (Poa annua) in a cool-season turfgrass stand on a long-term basis?

Hand-pulling mature plants after seed set
Increasing mowing height to shade out Poa annua
Increasing irrigation frequency to favor Poa annua competitors
Applying a pre-emergent herbicide before soil temperatures reach 50–55°F in fall (Correct answer)

Correct answer: Applying a pre-emergent herbicide before soil temperatures reach 50–55°F in fall

Pre-emergent herbicides applied before Poa annua seed germination (when soil temps drop to 50–55°F in fall) are the most effective long-term management strategy.

Question 12: Why is mulching beneficial for landscaped areas?

Removes nutrients from soil.
Increases erosion.
Promotes soil moisture and weed control (Correct answer)
Attracts pests.

Correct answer: Promotes soil moisture and weed control

Mulching is highly beneficial as it creates a protective layer over the soil. This layer significantly reduces water evaporation, helping to conserve soil moisture, and also suppresses weed growth by blocking sunlight, thus minimizing competition for nutrients and water.

Question 13: A grounds worker develops a rash on exposed skin after spreading a new mulch product. The manager should:

Switch the worker to a different task without documenting the incident
Wait to see if the rash resolves overnight before taking action
Advise the worker to use more sunscreen
Remove the worker from exposure, provide first aid, review the product SDS, and report the incident (Correct answer)

Correct answer: Remove the worker from exposure, provide first aid, review the product SDS, and report the incident

A suspected chemical dermatitis requires removing the worker from exposure, consulting the SDS, providing first aid or medical care, and documenting the incident per OSHA recordkeeping rules.

Question 14: Which of the following actions by a grounds manager would most likely require a Section 404 permit from the Army Corps of Engineers?

Removing dead trees from a riparian buffer zone
Filling a low-lying wet area to create a new sports field (Correct answer)
Applying herbicides to control aquatic weeds in a pond
Installing an underground irrigation system in upland turf

Correct answer: Filling a low-lying wet area to create a new sports field

Placing fill material in wetlands or waters of the U.S. requires a Section 404 permit; filling a wet area (likely a wetland) to build a sports field is a classic example requiring this permit.

Question 15: The National Environmental Policy Act (NEPA) requires federal agencies to prepare an Environmental Impact Statement (EIS) for projects that:

Use any amount of federal funding for landscaping
Disturb more than one acre of land
Involve pesticide applications on federal property
May significantly affect the quality of the human environment (Correct answer)

Correct answer: May significantly affect the quality of the human environment

NEPA requires federal agencies to prepare an EIS for 'major federal actions significantly affecting the quality of the human environment,' ensuring environmental factors are considered in federal decision-making.

Question 16: In grounds management contracting, what is the purpose of a performance bond?

To cover equipment theft
To fund employee benefits
To guarantee the contractor will complete the work per contract terms or the bond covers resulting losses (Correct answer)
To reward the contractor for early completion

Correct answer: To guarantee the contractor will complete the work per contract terms or the bond covers resulting losses

A performance bond is a surety instrument that protects the project owner if the contractor fails to fulfill contractual obligations.

Question 17: A grounds crew is installing a new irrigation system. Which pipe material is most commonly specified for main lines in commercial landscape installations due to its pressure rating and longevity?

Polyethylene (PE) tubing
Copper Type M
Galvanized steel
PVC Schedule 40 (Correct answer)

Correct answer: PVC Schedule 40

PVC Schedule 40 is widely used for main irrigation lines because of its high pressure rating, durability, and cost-effectiveness in commercial applications.

Question 18: What is the correct order for donning personal protective equipment?

Gown, mask, eye protection, gloves (Correct answer)
Gloves, gown, mask, eye protection
Any order is acceptable
Mask, gloves, gown, eye protection

Correct answer: Gown, mask, eye protection, gloves

The correct donning sequence (gown, mask, eye protection, gloves) ensures complete coverage and prevents contamination of already-donned items.

Question 19: What is risk mitigation?

Taking actions to reduce the likelihood or impact of identified risks (Correct answer)
Transferring all responsibility to insurers
Eliminating all risks completely
Ignoring risks with low probability

Correct answer: Taking actions to reduce the likelihood or impact of identified risks

Risk mitigation involves specific actions to reduce either the likelihood of risk occurrence or its potential impact, bringing residual risk to acceptable levels.

Question 20: Which cost is typically classified as a fixed cost in a grounds operations budget?

Seasonal mulch purchases
Fertilizer costs
Building lease for the maintenance facility (Correct answer)
Staff overtime pay

Correct answer: Building lease for the maintenance facility

A building lease is a fixed cost because it remains constant regardless of operational output, unlike variable costs that change with activity level.

Question 21: When applying pesticides near a water body, which label requirement takes precedence over all other application decisions?

Local weather forecasts
The client's preference
The applicator's personal experience
The pesticide label as a legal document (Correct answer)

Correct answer: The pesticide label as a legal document

The pesticide label is a legal document under FIFRA, and all applicators must follow its instructions, including buffer zones near water bodies.

Question 22: Which soil amendment is most commonly used to immobilize heavy metal contaminants through pH adjustment?

Sulfur
Agricultural lime (Correct answer)
Ammonium sulfate
Iron sulfate

Correct answer: Agricultural lime

Agricultural lime raises soil pH, causing many heavy metals to precipitate into less soluble, less bioavailable forms in the soil matrix.

Question 23: Under the OSHA Bloodborne Pathogens standard, which body fluid from a public space requires grounds workers to use universal precautions?

Mud containing soil bacteria
Rain puddle water
Blood found on a playing field (Correct answer)
Sweat on exercise equipment

Correct answer: Blood found on a playing field

Blood is a primary vehicle for bloodborne pathogens such as HIV and hepatitis B, requiring universal precautions including gloves and proper disposal.

Question 24: What role does documentation play in Certified Grounds Manager professional practice?

It creates accountability, supports decision-making, and provides legal protection (Correct answer)
It is optional for experienced professionals
It is an administrative burden with no practical value
It is only needed for billing purposes

Correct answer: It creates accountability, supports decision-making, and provides legal protection

Documentation creates accountability, supports informed decision-making, and provides legal protection for both the professional and the client.

Question 25: In a sports field renovation plan, what is the main agronomic benefit of core aeration followed by overseeding?

It prevents surface water runoff entirely
It eliminates the need for fertilization that season
It reduces thatch while improving seed-to-soil contact and germination (Correct answer)
It hardens the turf surface for heavy athletic use immediately

Correct answer: It reduces thatch while improving seed-to-soil contact and germination

Core aeration removes plugs to reduce compaction and thatch, and the resulting holes improve seed-to-soil contact for successful overseeding.

Question 26: What does the term 'pump-and-treat' refer to in groundwater remediation?

Extracting contaminated groundwater, treating it above ground, and reinjecting or discharging it (Correct answer)
Using pumps to aerate contaminated ponds
Applying chemical treatments via irrigation pumps
Pumping nutrients into soil to treat contamination

Correct answer: Extracting contaminated groundwater, treating it above ground, and reinjecting or discharging it

Pump-and-treat systems extract contaminated groundwater to the surface for treatment before safe discharge or reinjection.

Question 27: A grounds department is evaluating two mowers: one costs $25,000 with $2,000/year maintenance, and another costs $18,000 with $4,500/year maintenance. After how many years does the cheaper mower become more expensive?

5 years
3 years (Correct answer)
4 years
2 years

Correct answer: 3 years

The $7,000 upfront savings erodes at $2,500/year ($4,500 - $2,000), so after 2.8 years (≈3 years) the lower-cost mower costs more overall.

Question 28: Which practice best mitigates the spread of invasive plant species from a contaminated or disturbed grounds area?

Establishing a buffer of dense native plantings around the disturbed area combined with early detection monitoring (Correct answer)
Installing chain-link fencing around the affected zone
Applying broad-spectrum herbicide across the entire property
Mowing the invasive species repeatedly throughout the growing season

Correct answer: Establishing a buffer of dense native plantings around the disturbed area combined with early detection monitoring

Dense native plantings outcompete invasive species for resources while regular monitoring at the buffer perimeter enables early detection and targeted removal before spread occurs.

Question 29: What is the purpose of a 'trigger date' or GDD (growing degree day) model in a pest management program?

To determine when to aerate based on root growth activity
To predict optimal timing for pest control applications based on insect development (Correct answer)
To set irrigation run times based on soil temperature
To schedule fertilizer applications relative to soil freeze dates

Correct answer: To predict optimal timing for pest control applications based on insect development

GDD models accumulate heat units to predict when pest life stages (egg hatch, larval emergence) occur, allowing precisely timed preventive or curative treatments.

Question 30: When preparing a capital improvement budget request for new irrigation infrastructure, which factor is least relevant?

The grounds manager's years of service (Correct answer)
Expected equipment lifespan
Installation cost estimate
Projected water savings

Correct answer: The grounds manager's years of service

Capital budget requests should be based on financial and operational factors such as costs, savings, and asset longevity, not staff tenure.

Question 31: A grounds manager needs to establish turf on a steep slope to prevent erosion. Which establishment method is most effective for immediate coverage?

Hydroseeding without a tackifier
Sprigging with warm-season grass
Seeding with annual ryegrass
Sodding with an appropriate species (Correct answer)

Correct answer: Sodding with an appropriate species

Sodding provides immediate ground coverage and root establishment that stabilizes the slope against erosion far faster than any seeding method.

Question 32: What is the optimal soil pH range for most cool-season turfgrass species?

4.5–5.0
7.5–8.0
6.0–7.0 (Correct answer)
5.0–5.5

Correct answer: 6.0–7.0

Most turfgrass species perform best at a soil pH of 6.0–7.0, which optimizes nutrient availability and microbial activity.

Question 33: A backflow preventer on an irrigation system is required primarily to:

Filter sediment from sprinkler heads
Increase water pressure
Reduce water hammer in the main line
Prevent contaminated irrigation water from flowing back into the potable water supply (Correct answer)

Correct answer: Prevent contaminated irrigation water from flowing back into the potable water supply

Backflow preventers protect public drinking water from contamination by stopping reverse flow of irrigation water, which may contain fertilizers or pesticides.

Question 34: A rain garden designed for stormwater mitigation performs best when planted with which type of vegetation?

Dense turfgrass
Shade-tolerant ferns
Deep-rooted native plants tolerant of both wet and dry conditions (Correct answer)
Shallow-rooted annual flowers

Correct answer: Deep-rooted native plants tolerant of both wet and dry conditions

Deep-rooted native plants improve infiltration, tolerate periodic flooding and drought cycles, and require minimal maintenance in rain garden applications.

Question 35: Under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), what concept makes current property owners potentially liable for contamination they did not cause?

Strict liability with joint and several liability provisions (Correct answer)
Proportional liability based on current land use
Criminal liability reserved for intentional dumping
Negligence-based liability requiring proof of fault

Correct answer: Strict liability with joint and several liability provisions

CERCLA imposes strict, joint, and several liability, meaning current property owners can be held fully liable for cleanup costs even if they did not cause the contamination.

Question 36: What is the primary purpose of regulatory compliance in professional practice?

To protect public safety and ensure minimum standards of care (Correct answer)
To create bureaucratic obstacles
To limit the number of practitioners
To increase operating costs

Correct answer: To protect public safety and ensure minimum standards of care

Regulatory compliance exists primarily to protect public safety by ensuring all practitioners meet minimum standards of competence and ethical conduct.

Question 37: Which financial metric measures the number of months or years required for an investment to pay for itself through savings?

Gross margin
Payback period (Correct answer)
Internal rate of return
Net present value

Correct answer: Payback period

The payback period calculates how long it takes for cumulative savings or benefits from an investment to equal the initial cost.

Question 38: What is the primary goal of Integrated Pest Management (IPM)?

Eliminate all pests using maximum pesticide application
Rely exclusively on biological controls to eliminate pests
Apply pesticides on a fixed schedule regardless of pest presence
Manage pest populations using a combination of strategies to minimize environmental impact (Correct answer)

Correct answer: Manage pest populations using a combination of strategies to minimize environmental impact

IPM uses a combination of biological, cultural, physical, and chemical strategies to manage pests while minimizing environmental and human health impacts.

Question 39: Which personal protective equipment (PPE) is essential when operating a chainsaw?

Flip-flops and tank top.
Sunglasses only.
Goggles, gloves, chaps, and ear protection (Correct answer)
No protection is needed.

Correct answer: Goggles, gloves, chaps, and ear protection

When operating a chainsaw, essential Personal Protective Equipment (PPE) includes goggles to protect eyes from flying debris, gloves for grip and hand protection, chaps to guard legs against kickback, and ear protection to prevent hearing damage from the loud noise, all crucial for safety.

Question 40: A grounds department wants to justify hiring an additional full-time employee. Which analysis best supports this request?

A pest management log
A soil test report
An irrigation audit
A workload analysis comparing labor hours needed versus available (Correct answer)

Correct answer: A workload analysis comparing labor hours needed versus available

A workload analysis quantifies the hours of labor required versus the hours currently available, providing data-driven justification for additional staffing.

Question 41: Which best describes the purpose of a pre-task safety briefing before beginning a high-risk operation such as tree removal near a structure?

To allow supervisors to document work start times
To satisfy insurance documentation requirements only
To assign blame in advance if an incident occurs
To ensure all crew members understand hazards, escape routes, roles, and communication signals before work begins (Correct answer)

Correct answer: To ensure all crew members understand hazards, escape routes, roles, and communication signals before work begins

Pre-task briefings ensure every worker understands site-specific hazards, their individual role, drop zones, escape routes, and the communication plan, reducing miscommunication incidents.

Question 42: What is the significance of professional networking in the Certified Grounds Manager field?

It is only important early in one's career
It is only useful for finding new employment
It facilitates knowledge exchange, referrals, and collaborative problem-solving (Correct answer)
It distracts from actual work

Correct answer: It facilitates knowledge exchange, referrals, and collaborative problem-solving

Professional networking facilitates knowledge exchange, generates referrals, and enables collaborative problem-solving that improves practice quality.

Question 43: What is the primary reason grounds managers should conduct regular toolbox talks (tailgate safety meetings)?

To satisfy annual performance review requirements
To document that all PPE has been distributed
To fulfill administrative paperwork quotas
To reinforce hazard awareness and safe practices for current job conditions (Correct answer)

Correct answer: To reinforce hazard awareness and safe practices for current job conditions

Toolbox talks provide timely, task-specific safety reinforcement that keeps hazard awareness current with changing seasonal conditions and job assignments.

Question 44: A heat index of 103°F (39°C) places outdoor workers in which OSHA heat risk category?

Lower (caution)
Very High to Extreme (Correct answer)
Moderate
High

Correct answer: Very High to Extreme

OSHA classifies a heat index above 103°F as Very High to Extreme risk, requiring the most rigorous preventive measures.

Question 45: In grounds management, what does the term 'total cost of ownership' (TCO) include?

Purchase price, operating costs, maintenance, and disposal costs over the asset's life (Correct answer)
Insurance premiums only
Only the initial purchase price of equipment
Labor costs only

Correct answer: Purchase price, operating costs, maintenance, and disposal costs over the asset's life

TCO encompasses all costs associated with an asset from acquisition through disposal, providing a comprehensive view of true financial impact.

Question 46: How does maintaining proper credentials demonstrate regulatory compliance?

It is only needed for job applications
It has no relation to compliance
It proves the practitioner has met all requirements for legal practice (Correct answer)
It only matters during audits

Correct answer: It proves the practitioner has met all requirements for legal practice

Current credentials demonstrate that a practitioner has met educational, examination, and continuing education requirements mandated by regulatory bodies for legal practice.

Question 47: What is the term for the annual loss in value of grounds equipment recorded for accounting purposes?

Accrual
Depreciation (Correct answer)
Liquidation
Amortization

Correct answer: Depreciation

Depreciation records the systematic reduction in an asset's book value over its useful life, reflecting wear and obsolescence.

Question 48: What is an encumbrance in a public-sector grounds management budget?

A type of equipment lien
A penalty for overspending
Unspent funds returned to general revenue
Funds committed by a purchase order or contract but not yet paid (Correct answer)

Correct answer: Funds committed by a purchase order or contract but not yet paid

An encumbrance reserves budget funds when a purchase order is issued, preventing those dollars from being spent elsewhere before the invoice is paid.

Question 49: Which communication tool is most reliable for grounds staff coordination during an emergency when cell networks are overloaded?

Building intercom systems
Two-way radios (walkie-talkies) (Correct answer)
Email on cellular data networks
Social media messaging apps

Correct answer: Two-way radios (walkie-talkies)

Two-way radios operate on dedicated radio frequencies that remain functional when cellular networks are congested or damaged during emergencies.

Question 50: Lock-out/Tag-out (LOTO) procedures are required when grounds workers perform which activity?

Refueling a ride-on mower with the engine off
Changing the cutting deck height on a mower
Clearing a clog from a running chipper's feed chute
Servicing or unclogging equipment where unexpected energization could cause injury (Correct answer)

Correct answer: Servicing or unclogging equipment where unexpected energization could cause injury

LOTO (OSHA 29 CFR 1910.147) must be applied any time a worker services equipment where unexpected startup or energy release could cause injury.

Question 51: State water quality standards established under the Clean Water Act Section 303(d) create lists of 'impaired water bodies' that require development of:

Total Maximum Daily Loads (TMDLs) (Correct answer)
Environmental Impact Statements
National Pollutant Discharge Elimination System permits for all users
Emergency Response Plans

Correct answer: Total Maximum Daily Loads (TMDLs)

Section 303(d) requires states to list impaired water bodies and develop Total Maximum Daily Loads (TMDLs), which establish the maximum amount of a pollutant a water body can receive while still meeting water quality standards.

Question 52: What does the 'economic threshold' represent in pest management?

The pest population level at which control measures become economically justified (Correct answer)
The point at which pest damage first becomes visible to the naked eye
The total cost of an annual pesticide application program
The maximum budget a grounds manager can allocate to pest control

Correct answer: The pest population level at which control measures become economically justified

The economic threshold is the pest population level at which the cost of crop or turf damage exceeds the cost of implementing control measures.

Question 53: A grounds manager receives a bid that is 40% below all other bids. What should be the first course of action?

Investigate the bid for errors, omissions, or unrealistic assumptions (Correct answer)
Reject it without review
Request that other vendors lower their bids to match
Accept it immediately to save money

Correct answer: Investigate the bid for errors, omissions, or unrealistic assumptions

An abnormally low bid should be reviewed for mistakes or missing scope items that could lead to disputes or cost overruns.

Question 54: A grounds worker is using a string trimmer when a piece of debris strikes their lower leg and causes a deep laceration. The FIRST priority is:

Completing the task and reporting the injury at end of shift
Rinsing the wound with the nearest water source and continuing work
Applying direct pressure to control bleeding and calling for help (Correct answer)
Photographing the injury site for the incident report

Correct answer: Applying direct pressure to control bleeding and calling for help

Controlling hemorrhage with direct pressure is the immediate life-safety priority for a significant laceration before any other steps.

Question 55: When should a risk register be updated?

Only when auditors request it
Only during annual reviews
Continuously as new risks emerge and existing risks change (Correct answer)
When a risk event actually occurs

Correct answer: Continuously as new risks emerge and existing risks change

Continuous updates to the risk register ensure it reflects the current risk landscape, enabling timely responses to new and changing risks.

Question 56: A CGM is reviewing a landscape maintenance contract. Which specification item ensures the contractor is legally responsible for pesticide application compliance?

A bonding requirement for equipment damage
A clause requiring ISO 9001 certification
An indemnity clause covering plant replacement only
A requirement that applicators hold valid state pesticide applicator licenses (Correct answer)

Correct answer: A requirement that applicators hold valid state pesticide applicator licenses

State pesticide applicator licenses are legally required under FIFRA and state law, and specifying valid licensure ensures the contractor is authorized and accountable for compliant applications.

Question 57: Which entity typically has authority to establish practice standards?

Equipment manufacturers
Individual practitioners
State licensing boards and professional regulatory bodies (Correct answer)
Insurance companies

Correct answer: State licensing boards and professional regulatory bodies

State licensing boards and professional regulatory bodies have the legal authority to establish and enforce practice standards within their jurisdiction.

Question 58: Under the OSHA Hazard Communication Standard (HazCom), employees who work with hazardous chemicals must be trained:

Before working with hazardous chemicals and when new hazards are introduced (Correct answer)
Only upon initial hire
Only when a chemical-related incident occurs
At least every five years

Correct answer: Before working with hazardous chemicals and when new hazards are introduced

HazCom requires training before initial exposure and whenever new chemical hazards are introduced to the workplace.

Question 59: What is the best time of day to apply foliar fungicides to turfgrass to maximize efficacy and minimize evaporation?

Any time the turf is actively growing
Early morning before dew dries
Midday when temperatures are highest
Late afternoon or early evening (Correct answer)

Correct answer: Late afternoon or early evening

Late afternoon or early evening applications allow the fungicide to remain on foliage longer before drying, improving absorption while reducing heat-related breakdown.

Question 60: Which environmental condition most commonly causes powdery mildew in landscape plants?

Waterlogged soils with high nitrogen
Extreme heat above 95°F
High humidity with full sun exposure
Low humidity with shaded, poorly ventilated conditions (Correct answer)

Correct answer: Low humidity with shaded, poorly ventilated conditions

Powdery mildew thrives in shaded areas with poor air circulation and low humidity, unlike most other fungal diseases.

Question 61: Which type of mower is typically preferred for maintaining golf course fairways due to its precise, low cutting height and clean cut quality?

String trimmer
Flail mower
Rotary deck mower
Reel mower (Correct answer)

Correct answer: Reel mower

Reel mowers use a scissor-like cutting action that produces a precise, clean cut at very low heights required for fairway and putting surface management.

Question 62: What is the primary function of a backflow preventer in an irrigation system?

To regulate water pressure throughout the system
To automate zone scheduling
To filter debris from irrigation heads
To prevent contaminated water from flowing back into the potable supply (Correct answer)

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

A backflow preventer stops reverse flow that could introduce fertilizers, pesticides, or contaminants into the drinking water supply.

Question 63: A grounds worker is stung multiple times by wasps while mowing near a hidden nest and shows signs of throat swelling and difficulty breathing. The manager should FIRST:

Call 911 immediately as these are signs of anaphylaxis (Correct answer)
Apply an ice pack and monitor the worker
Have the worker sit and drink water
Administer an oral antihistamine and wait 30 minutes

Correct answer: Call 911 immediately as these are signs of anaphylaxis

Throat swelling and breathing difficulty after multiple stings indicate anaphylaxis, a life-threatening emergency requiring immediate EMS activation.

Question 64: Under most state contractor licensing laws, how long must a grounds management company retain client contracts and work order documentation?

Indefinitely with no maximum retention period
3–7 years, depending on state statute of limitations (Correct answer)
6 months after job completion
1 year after job completion

Correct answer: 3–7 years, depending on state statute of limitations

Most states require business contracts and work orders to be retained for 3–7 years to align with civil statute of limitations periods for contract disputes.

Question 65: What does a budget variance report primarily communicate to grounds management leadership?

Pesticide application records
Equipment maintenance schedules
The difference between budgeted and actual expenditures (Correct answer)
The number of staff hours worked

Correct answer: The difference between budgeted and actual expenditures

A budget variance report compares planned spending to actual spending, highlighting over- or under-budget line items for management review.

Question 66: How should Certified Grounds Manager professionals approach quality improvement?

Quality improvement is the responsibility of management only
By waiting for client complaints
By copying what competitors do
Through systematic evaluation of outcomes and implementation of evidence-based changes (Correct answer)

Correct answer: Through systematic evaluation of outcomes and implementation of evidence-based changes

Systematic evaluation of outcomes with evidence-based improvements ensures continuous quality enhancement and demonstrates professional commitment to excellence.

Question 67: What is the function of a landscape irrigation system?

To apply pesticides.
To wash equipment.
To deliver water to landscape areas (Correct answer)
To fertilize trees.

Correct answer: To deliver water to landscape areas

The primary function of a landscape irrigation system is to efficiently deliver water to plants, lawns, and other landscaped areas. This ensures that vegetation receives adequate hydration, especially during dry periods, promoting healthy growth and maintaining the aesthetic appeal of the landscape.

Question 68: What is the primary regulatory purpose of a Phase I Environmental Site Assessment (ESA)?

To test soil for nutrient content before renovation
To comply with OSHA workplace safety inspections
To identify recognized environmental conditions (RECs) that may indicate hazardous contamination (Correct answer)
To establish baseline turfgrass health metrics for a property

Correct answer: To identify recognized environmental conditions (RECs) that may indicate hazardous contamination

A Phase I ESA identifies recognized environmental conditions (RECs) such as past industrial use or storage tanks that may indicate potential contamination, typically required before property transactions.

Question 69: Which procurement method requires grounds managers to obtain at least three competitive quotes before purchasing?

Blanket purchase order
Sole-source procurement
Informal competitive bidding (three-quote rule) (Correct answer)
Petty cash purchase

Correct answer: Informal competitive bidding (three-quote rule)

The informal competitive bidding or three-quote rule is a common public procurement requirement ensuring fair pricing for smaller purchases.

Question 70: What is the primary purpose of a life-cycle cost analysis when purchasing grounds equipment?

To determine resale value only
To compare equipment brand reputation
To assess the total cost of ownership over the equipment's useful life (Correct answer)
To evaluate color and aesthetics

Correct answer: To assess the total cost of ownership over the equipment's useful life

Life-cycle cost analysis evaluates purchase price, maintenance, fuel, and disposal costs over the full ownership period to determine true cost.

Question 71: Which factor most directly determines the correct spacing between sprinkler heads in a residential or commercial irrigation design?

The sprinkler's radius of throw and the head-to-head coverage principle (Correct answer)
The color of the sprinkler body
The time of day watering will occur
The brand of the irrigation controller

Correct answer: The sprinkler's radius of throw and the head-to-head coverage principle

Head-to-head coverage—spacing sprinklers so each head reaches the adjacent head—ensures uniform water distribution across the entire zone.

Question 72: What is a key indicator of good personnel management?

Poor communication.
Low staff morale.
High absenteeism.
Low turnover and high morale (Correct answer)

Correct answer: Low turnover and high morale

Low turnover and high morale are strong indicators of good personnel management because they reflect a positive and supportive work environment. When employees are satisfied and feel valued, they are less likely to leave the organization, leading to stability and continuity. High morale also translates into increased productivity, engagement, and a more harmonious team.

Question 73: What is thatch in lawn maintenance?

A type of irrigation system.
A dense layer of organic debris on the soil surface (Correct answer)
Insect infestation.
Fertilizer buildup.

Correct answer: A dense layer of organic debris on the soil surface

Thatch is a layer of dead and living organic material, such as grass stems and roots, that accumulates between the green grass blades and the soil surface. While a thin layer can be beneficial, excessive thatch can impede water, air, and nutrient penetration, leading to an unhealthy lawn susceptible to pests and diseases.

Question 74: Which soil texture classification drains fastest and holds the least plant-available water?

Silt loam
Clay
Sandy loam
Sand (Correct answer)

Correct answer: Sand

Sand has large particles with large pores, so it drains very quickly and holds very little plant-available water compared to finer-textured soils.

Question 75: Why is pruning important in horticulture?

It adds weight to branches.
It enhances health and structure (Correct answer)
It causes stress.
It prevents all growth.

Correct answer: It enhances health and structure

Pruning is essential for enhancing a plant's health and structural integrity. By removing dead, diseased, or overcrowded branches, pruning improves air circulation, light penetration, and redirects energy to stronger growth, promoting overall vigor and often improving flowering or fruiting.

Certified Grounds Manager (CGM)

The Certified Grounds Manager (CGM) credential, awarded by the Professional Grounds Management Society (PGMS), validates expertise across four core competencies: Human Resource Management, Business and Financial Management, and Technical Management in both horticulture and non-horticulture grounds operations.

Questions

90 min

Time Limit

70%

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These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

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pgms.org — Renewal, fees, exam format, retake fee, retake policy, score release, test dates, time limit, score validity, test delivery · verified Oct 2026