106+ Free OFTEC Solid Fuel Practice Questions

Prepare for the OFT15-108D/W Installation, Commissioning and Servicing of Solid Fuel Burning Appliances (Ireland) exam with instant access — no signup required.

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2026 Statistics

Key Facts: OFTEC Solid Fuel Exam

100

Practice Questions

OpenExamPrep

OFT15-108D

Dry Solid Fuel Qualification

OFTEC

5 years

Re-assessment Interval

OFTEC

2022

OFTEC Sole Irish Registration Body

OFTEC Ireland

Part J

Irish Building Regulations

TGD J

2–4 days

Typical Centre Duration

OFTEC training guide

OFTEC OFT15-108D certifies solid fuel stove and room-heater installation, commissioning and servicing in Ireland. Assessment combines multiple-choice theory, PAWS worksheets and practical tasks at an approved centre, with re-assessment every five years. Since March 2022 OFTEC is Ireland's sole solid fuel installer registration body, allowing registered technicians to self-certify compliant work under the competent person scheme. OFT15-108W extends scope to wet central-heating connections and requires OFT15-108D plus a recognised plumbing qualification. Course fees are set by each approved centre; OFTEC registration is a separate annual or multi-year fee.

Sample OFTEC Solid Fuel Practice Questions

Try these sample questions to test your OFTEC Solid Fuel exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 106+ question experience with AI tutoring.

1Before starting solid fuel installation work in a customer's home, what is the first priority under OFTEC health and safety guidance?

A.Begin flue liner installation immediately to minimise visit time

B.Assume standard PPE is sufficient without assessing the specific hazards

C.Carry out a site-specific risk assessment and confirm safe access, lighting and isolation arrangements

D.Skip documentation until after the appliance is commissioned

Explanation: OFTEC solid fuel training emphasises assessing the work environment before starting. A site-specific risk assessment identifies hazards such as asbestos, confined spaces, working at height and electrical isolation needs.

2Which item of PPE is essential when handling soot, ash or dismantling a solid fuel flue system?

A.Hearing defenders only

B.Safety goggles without any hand protection

C.Suitable respiratory protection and gloves to reduce exposure to fine particulates

D.No PPE is required if the appliance has been cold for one hour

Explanation: Soot and ash contain fine particulates and combustion residues. OFTEC and general HSA guidance require appropriate RPE and gloves when cleaning flues or handling ash, even after cooling.

3When must safe electrical isolation be confirmed before working on a solid fuel appliance with electrical controls or a fan?

A.Only when replacing the main house consumer unit

B.Before removing panels, testing components or disturbing wiring

C.After the customer signs the completion certificate

D.Isolation is never required on room heaters because they are low voltage

Explanation: OFTEC solid fuel courses cover safe electrical isolation for appliances with fans, controls or auto-ignition aids. Power must be isolated and proved dead before intrusive electrical work.

4A technician discovers suspected asbestos insulating board around an old fireplace opening. What is the correct action?

A.Remove the board carefully with a standard dust mask

B.Seal the area with paint and continue installing the stove

C.Stop work, do not disturb the material, and advise the customer to arrange a licensed asbestos survey

D.Ignore it if the stove manufacturer allows close clearances

Explanation: Disturbing asbestos without proper controls is a serious health hazard. Competent installers must stop and refer to licensed specialists rather than disturb unknown materials.

5Why should hot ash never be placed in a plastic wheelie bin or combustible container?

A.It makes the bin too heavy for collection

B.Ash has no heat retention once removed from the firebox

C.Plastic bins are required to store ash for recycling

D.Residual heat can reignite surrounding combustible waste and cause a fire

Explanation: Ash can remain hot enough to ignite combustible refuse for many hours. OFTEC servicing guidance requires cooling ash in a metal container with a tight lid before disposal.

6Working on a roof to install a twin-wall flue terminal requires additional controls because:

A.Falls from height and manual handling of chimney sections create significant injury risks

B.Roof work is exempt from health and safety law for heating technicians

C.Only scaffolding is ever required; ladders are always prohibited

D.Flue terminals never need access above the roofline

Explanation: Twin-wall systems often terminate above the roof. Technicians need fall protection, stable access equipment and a rescue plan in line with work-at-height regulations.

7Carbon monoxide (CO) exposure risk during solid fuel work is reduced by:

A.Closing all windows to stabilise the flue draught

B.Ensuring adequate ventilation during spillage tests and never running an appliance in a sealed room without designed air supply

C.Relying on the customer to smell CO

D.Blocking spare vent openings to increase efficiency

Explanation: CO is odourless. Testing and commissioning must be done with correct ventilation. Sealing a room or blocking vents can allow dangerous CO accumulation during spillage or commissioning checks.

8Manual handling of a heavy steel stove should be planned by:

A.Using mechanical aids or additional trained personnel and clearing a safe route before lifting

B.Dragging the stove across the finished floor without protection

C.One person lifting if the customer helps steady the hearth

D.Leaving packaging underneath to slide it into position

Explanation: Solid fuel appliances are heavy. OFTEC training aligns with manual handling regulations: plan the lift, use aids where needed and protect finishes.

9When using power tools to core-drill a ventilation opening, what control is most important?

A.Drilling as fast as possible to reduce noise duration

B.Checking for hidden services and using appropriate dust extraction or local exhaust

C.Drilling without marking because vents are always in external walls

D.Using any drill bit size that fits the vent grille

Explanation: Core drilling risks striking cables or pipes and creates silica dust. Service locating and dust control are basic competent-person precautions.

10After identifying an immediately dangerous solid fuel installation with CO spillage into the room, the technician should:

A.Leave quietly to avoid worrying the customer

B.Adjust the damper and leave without further action

C.Complete the service because the customer requested it

D.Make the situation safe, isolate or shut down the appliance, warn occupants and record the unsafe situation

Explanation: OFTEC training covers unsafe situations: protect occupants first, shut down or isolate the appliance, ventilate if safe to do so and document findings. Do not leave a known dangerous installation operating.

About the OFTEC Solid Fuel Exam

The OFTEC solid fuel assessment (OFT15-108D for dry appliances, OFT15-108W for wet systems) certifies installers and servicing technicians to install, commission and service solid fuel stoves, room heaters and related equipment in Irish dwellings. Since 2022 OFTEC is the only body providing solid fuel installer registration in Ireland, enabling competent-person self-certification of notifiable work. Assessment covers health and safety, Irish Building Regulations Part J, fuels, combustion, hearths, flues, ventilation, commissioning, servicing and OFTEC work-notification procedures.

Assessment

Centre-based assessment combining multiple-choice theory, practically assessed worksheets (PAWS) and hands-on installation/commissioning/servicing tasks. OFT15-108D covers dry space-heating appliances; OFT15-108W adds wet central-heating connections and requires plumbing qualifications.

Time Limit

Typically 2–4 days guided learning and assessment at an approved training centre

Passing Score

Pass all assessment elements — theory, PAWS and practical (criteria set by the OFTEC approved assessment centre)

Exam Fee

Bundled in the course fee at the OFTEC approved training centre (contact centre for current fees) (Oil Firing Technical Association (OFTEC) — assessments delivered by approved training centres; registration via OFTEC competent person scheme)

OFTEC Solid Fuel Exam Content Outline

10%

Health & Safety

Risk assessment, PPE, isolation, CO awareness and unsafe situations

10%

Legislation & Registration

Part J, TGD J, OFTEC registration and competent person self-certification

12%

Fuels & Combustion

Fuel selection, moisture, combustion principles and creosote

10%

Appliance Selection

Sizing, multi-fuel appliances, external air and wet system scope

Hearths & Surrounds

Constructional hearths, clearances and recess installations

14%

Flues & Chimneys

Lining, twin-wall systems, terminals, standards and inspection

10%

Ventilation

Permanent air supply, ventilation tables and extract-fan risks

12%

Commissioning & Servicing

Spillage testing, CO alarms, maintenance and handover

Fault Finding

Blocked flues, spillage, downdraught and remedial verification

OFTEC Procedures

Work notification, technician ID, extension of scope and technical books

How to Pass the OFTEC Solid Fuel Exam

What You Need to Know

Passing score: Pass all assessment elements — theory, PAWS and practical (criteria set by the OFTEC approved assessment centre)
Assessment: Centre-based assessment combining multiple-choice theory, practically assessed worksheets (PAWS) and hands-on installation/commissioning/servicing tasks. OFT15-108D covers dry space-heating appliances; OFT15-108W adds wet central-heating connections and requires plumbing qualifications.
Time limit: Typically 2–4 days guided learning and assessment at an approved training centre
Exam fee: Bundled in the course fee at the OFTEC approved training centre (contact centre for current fees)

Keys to Passing

Work through all 106 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

OFTEC Solid Fuel Study Tips from Top Performers

1Memorise hearth plan dimensions: 500 mm front, 150 mm each side, 125 mm constructional thickness

2Know ventilation calculation basics: ~550 mm²/kW for first 5 kW, then ~1100 mm²/kW without a draught stabiliser (ADJ/TGD J Table 1 approach)

3Understand when to line chimneys, how to size liners and when twin-wall systems are used

4Practice spillage testing and ventilation interaction with kitchen extract fans

5Review OFTEC registration scope: OFT15-108D (dry) vs OFT15-108W (wet + plumbing qualification)

6Complete all 100 practice questions and review every miss with the AI tutor before your centre theory papers

Frequently Asked Questions

What is the OFTEC solid fuel qualification code?

OFT15-108D covers installation, commissioning and servicing of solid fuel burning appliances for domestic space heating (dry systems). OFT15-108W extends this to appliances connected to central heating and hot water, but requires OFT15-108D and a recognised plumbing qualification first.

Is OFTEC the only solid fuel registration body in Ireland?

Yes. Since HETAS withdrew its Irish installer scheme in March 2022, OFTEC is the only body providing solid fuel installer and servicing technician registration in the Republic of Ireland, demonstrating compliance with building regulations through the competent person scheme.

What does the OFTEC solid fuel assessment include?

OFTEC approved centres assess candidates using multiple-choice theory papers, practically assessed worksheets (PAWS) and practical hands-on tasks covering installation, commissioning and servicing. All elements must be passed. Re-assessment is required after five years.

What are the entry requirements for OFT15-108D?

Applicants need a nationally recognised qualification in a trade associated with solid fuel work, or relevant skills and experience in chimney sweeping, plumbing, heating, ventilation, refrigeration, air-conditioning or gas fitting, evidenced to the assessment centre. Category 2 candidates must also complete training at an approved centre.

Which Irish building regulations apply to stove installation?

Combustion appliances and flues are governed by Part J of the Building Regulations, with guidance in Technical Guidance Document J (TGD J) covering hearths, flue sizing, ventilation, separation from combustibles and carbon monoxide alarm provision.

Is this free OFTEC solid fuel practice test enough to pass the assessment?

Our 100 multiple-choice questions cover OFT15-108D theory topics — fuels, flues, ventilation, hearths, commissioning and OFTEC procedures — with teaching explanations for every answer. You still need centre-based PAWS and practical assessment, but this bank strengthens theory readiness before your course.