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Key Facts: Concorso Vice Direttore Vigili del Fuoco Exam

12 Subjects

Subject files in the official preselection banca dati

Banca dati preselettiva CNVVF (vigilfuoco.it)

40 Questions

Preselective test size in the published banca dati editions

Banca dati preselettiva CNVVF (vigilfuoco.it)

60 Minutes

Preselective test duration in the published banca dati editions

Banca dati preselettiva CNVVF (vigilfuoco.it)

35 Years

Maximum entry age, raised by up to 3 years for military service

Art. 2, D.D. n. 2320 dell'11 giugno 2025

21/30

Minimum mark required in the written paper and in the oral

Art. 8, D.D. n. 2320 dell'11 giugno 2025

EUR 0

Application fee (no fee is provided for in the bando)

D.D. n. 2320 dell'11 giugno 2025

The Italian Fire Corps Vice Direttore competition recruits licensed engineers and architects into the officer cadre (ruolo dei direttivi). Governed by D.Lgs. 217/2005, it uses an official 12-subject banca dati for the optional preselective test (40 MCQs in 60 minutes in the published editions), one written technical paper and an oral examination, each needing at least 21/30. Application is free of charge, and winners serve a twelve-month probation built around a nine-month course at the Istituto Superiore Antincendi. This bank offers 100 independent English-language practice MCQs with detailed explanations across all 12 subjects.

Sample Concorso Vice Direttore Vigili del Fuoco Practice Questions

Try these sample questions to review concepts for the Concorso Vice Direttore Vigili del Fuoco exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In the complete stoichiometric combustion of methane (CH4) with pure oxygen at standard conditions, what is the exact molar ratio of oxygen to methane required according to the balanced chemical equation CH4 + 2O2 -> CO2 + 2H2O?

A.2 moles of O2 per mole of CH4

B.1 mole of O2 per mole of CH4

C.3 moles of O2 per mole of CH4

D.4 moles of O2 per mole of CH4

Explanation: Balancing the combustion reaction for methane yields CH4 + 2O2 -> CO2 + 2H2O. Each carbon atom requires one molecule of O2 to form CO2, and each pair of hydrogen atoms requires half a molecule of O2 to form H2O (4 H atoms require 1 O2 to form 2 H2O). Therefore, exactly 2 moles of O2 are consumed per mole of methane.

2How do the Lower Flammable Limit (LFL) and Upper Flammable Limit (UFL) of a typical combustible gas mixture change as the initial mixture temperature increases?

A.The LFL decreases and the UFL increases, widening the overall flammability range

B.Both the LFL and the UFL increase, shifting the flammability range upward

C.Both the LFL and the UFL decrease, shifting the flammability range downward

D.The LFL increases and the UFL decreases, narrowing the flammability range

Explanation: According to the modified Burgess-Wheeler equation, elevating the initial temperature supplies sensible thermal energy to the mixture, lowering the chemical energy required from combustion to sustain flame propagation. Consequently, the lean limit (LFL) drops because less fuel is required to reach the adiabatic flame temperature, while the rich limit (UFL) expands upward because additional fuel can be tolerated before thermal quenching occurs.

3A chemical storage tank contains a solvent vapor whose Lower Flammable Limit (LFL) is 2.0% volume and whose stoichiometric combustion consumes 5 moles of O2 per mole of vapor. What is the approximate Minimum Oxygen Concentration (MOC) required for flame propagation, and to what level must oxygen be reduced to maintain a safe 2% volumetric safety margin below the MOC?

A.MOC is approximately 10% O2; oxygen must be purged below 8% volume

B.MOC is approximately 5% O2; oxygen must be purged below 3% volume

C.MOC is approximately 15% O2; oxygen must be purged below 13% volume

D.MOC is approximately 20% O2; oxygen must be purged below 18% volume

Explanation: By empirical approximation (NFPA 69), the Minimum Oxygen Concentration (MOC) can be estimated by multiplying the LFL by the stoichiometric molar oxygen ratio: MOC approx = LFL * (moles O2 / mole fuel) = 2.0% * 5 = 10% O2 by volume. Applying an operational safety buffer of 2% below the MOC requires nitrogen inerting to keep the oxygen concentration strictly below 10% - 2% = 8% by volume.

4Which thermodynamic mechanism fundamentally drives a Boiling Liquid Expanding Vapor Explosion (BLEVE) when a pressurized liquefied gas tank ruptures under external fire exposure?

A.Catastrophic depressurization of the liquid below its saturation pressure at a temperature exceeding its Superheat Limit Temperature (Tsl), causing explosive homogeneous nucleation throughout the entire volume

B.A supersonic chemical detonation of the vapor space inside the tank before any mechanical failure of the shell occurs

C.Rapid dissolution of toxic combustion gases into the liquid phase leading to exothermic decomposition of the tank lining

D.Sudden condensation of the headspace vapor producing a vacuum collapse followed by hydraulic water hammer rupture

Explanation: A BLEVE is a physical explosion occurring when the structural shell of a vessel containing a pressurized liquid fails while the liquid temperature is above its Superheat Limit Temperature (Tsl) at atmospheric pressure. The instantaneous depressurization causes the liquid to enter an extremely metastable superheated state, triggering spontaneous homogeneous bubble nucleation throughout the liquid volume. The near-instantaneous flash vaporization expands up to several hundred times in volume, tearing the tank apart and generating a catastrophic blast wave and fireball.

5How does the primary extinguishing mechanism of fluorinated clean agents (such as FK-5-1-12 or HFC-227ea) differ fundamentally from that of inert gas extinguishing systems (such as IG-541 or IG-55)?

A.Fluorinated clean agents extinguish primarily by thermal cooling and chemical chain radical scavenging, whereas inert gases extinguish by diluting oxygen concentration below the threshold required for combustion

B.Fluorinated clean agents extinguish purely by saponification, whereas inert gases extinguish by creating an impenetrable blanket of heavy liquid

C.Inert gases react chemically with flame radicals to terminate combustion, whereas fluorinated clean agents work strictly by oxygen displacement

D.Fluorinated clean agents require reducing oxygen concentration below 10%, whereas inert gases maintain full ambient oxygen levels

Explanation: Fluorinated synthetic clean agents extinguish fires at relatively low volumetric concentrations (typically 4% to 8%) primarily through physical heat absorption (cooling the flame front) and chemical inhibition by releasing halogen radicals that scavenge active H* and OH* chain-propagating radicals. In contrast, inert gas systems (argon, nitrogen, CO2 blends) work purely through oxygen dilution, reducing the ambient O2 concentration from 20.9% down to 12-14%, where flaming combustion can no longer be sustained.

6In classical chemical thermal explosion theory, what is the fundamental difference between the Semenov model and the Frank-Kamenetskii model regarding temperature distribution inside the reacting mass?

A.The Semenov model assumes a uniform spatial temperature inside the vessel with heat transfer resistance concentrated at the wall (Biot number << 1), whereas the Frank-Kamenetskii model accounts for internal conductive temperature gradients (Biot number >> 1)

B.The Semenov model considers only turbulent convective flow, whereas Frank-Kamenetskii assumes perfect radiative equilibrium with the surroundings

C.The Frank-Kamenetskii model assumes uniform temperature throughout, whereas the Semenov model solves the transient non-linear Fourier heat conduction equation

D.The Semenov model applies exclusively to solid explosives, whereas Frank-Kamenetskii applies exclusively to ideal gas phase detonations

Explanation: Semenov's thermal explosion theory assumes that internal heat conduction is very fast relative to boundary heat dissipation (Biot << 1), resulting in an essentially uniform temperature throughout the reacting substance. Frank-Kamenetskii extended this to larger stationary masses or poorly conducting media (Biot >> 1), where the primary resistance to heat loss is internal thermal conduction, requiring the solution of Poisson's equation with an Arrhenius heat generation term to determine the critical explosion parameter delta_cr.

7Under the ADR/RID international regulatory framework for the transport of dangerous goods, which hazard class specifically designates flammable liquids?

A.Class 3

B.Class 2

C.Class 4.1

D.Class 8

Explanation: Under ADR/RID classification: Class 3 covers flammable liquids (substances having a flash point of not more than 60 °C). Class 2 covers gases, Class 4.1 covers flammable solids, and Class 8 covers corrosive substances.

8An industrial spill releases 50 moles of sulfuric acid (H2SO4) into a retention basin. How many moles of calcium hydroxide (Ca(OH)2) are theoretically required to achieve complete stoichiometric neutralization according to the reaction H2SO4 + Ca(OH)2 -> CaSO4 + 2H2O?

A.50 moles

B.25 moles

C.100 moles

D.150 moles

Explanation: Sulfuric acid is a diprotic acid providing 2 moles of H+ ions per mole of acid. Calcium hydroxide is a diacidic base providing 2 moles of OH- ions per mole of base. Because the stoichiometric ratio in the balanced equation H2SO4 + Ca(OH)2 -> CaSO4 + 2H2O is 1:1, exactly 50 moles of Ca(OH)2 are required to neutralize 50 moles of H2SO4.

9In the European and Italian building classification standard for fire resistance (EN 13501-2 and D.M. 16/02/2007), what do the letters R, E, and I specifically designate for a structural or separating building element?

A.R = Load-bearing capacity (resistenza meccanica); E = Integrity against flame and hot gases (tenuta); I = Thermal insulation (isolamento termico)

B.R = Reaction to fire; E = Energy absorption; I = Ignition delay time

C.R = Smoke reduction index; E = Structural elasticity; I = Impact resistance

D.R = Radial heat resistance; E = Evacuation clearance; I = Internal stability

Explanation: Under EN 13501-2 and Italian fire legislation: R (Résistance) represents load-bearing capacity (the ability of a structure to support loads without collapse during fire exposure); E (Étanchéité) represents integrity (the ability to prevent the passage of flames and hot combustion gases); I (Isolation) represents thermal insulation (the ability to restrict the temperature rise on the unexposed face to specified thresholds, typically 140 °C average or 180 °C maximum).

10Under EN 1993-1-2 (Eurocode 3), the critical temperature of an unprotected structural carbon steel member is the temperature at which its reduced yield strength can no longer carry the fire design load. For a heavily loaded member with a degree of utilisation mu_0 = 0.65, in which range does that critical temperature fall?

A.500 °C to 550 °C

B.200 °C to 250 °C

C.850 °C to 900 °C

D.1150 °C to 1200 °C

Explanation: EN 1993-1-2 obtains the critical temperature directly from the degree of utilisation: theta_a,cr = 39.19 * ln[1 / (0.9674 * mu_0^3.833) - 1] + 482. For mu_0 = 0.65 this returns about 540 °C, which is why 500 °C to 550 °C is the range conventionally quoted for heavily loaded unprotected steel. Table 3.1 of the same standard gives the effective yield strength reduction factor k_y,theta as 1.00 at 400 °C, 0.78 at 500 °C and 0.47 at 600 °C, so yield strength itself only falls to about half its ambient value near 590 °C to 600 °C: a lightly utilised member survives hotter, a heavily utilised one fails sooner.

About the Concorso Vice Direttore Vigili del Fuoco Exam

The Concorso per Vice Direttore del Corpo Nazionale dei Vigili del Fuoco is Italy's official public competition for direct entry of licensed engineering and architecture graduates into the officer cadre of the Fire Corps, the ruolo dei direttivi. Governed by D.Lgs. 217/2005 and by the departmental decree of each edition, it is examined through an optional preselective test drawn from an official 12-subject item bank (banca dati), one written technical paper and an oral examination. Winners are appointed vice direttori in prova and serve a twelve-month probationary period — nine months of residential training at the Istituto Superiore Antincendi (ISA) in Rome and three months of tirocinio at the Comandi — before confirmation in the grade. This practice bank provides 100 English-language study MCQs across the 12 official subjects, with step-by-step explanations, quantitative calculations and legal analysis.

Exam sponsor: Ministero dell'Interno — Dipartimento dei Vigili del Fuoco, del Soccorso Pubblico e della Difesa Civile. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Where the twenty-times-the-posts threshold is reached, candidates first sit a computerised multiple-choice preselective test drawn from the official 12-subject banca dati; a number equal to ten times the posts, plus anyone tied with the last of them, goes forward with a minimum mark of 6/10. The examinations proper are one written paper — an essay or short structured answers on scienza e/o tecnica delle costruzioni plus three subjects the candidate chooses from elettrotecnica e impianti, ingegneria chimica e impianti chimici, macchine e meccanica applicata, idraulica e costruzioni idrauliche, costruzioni civili e industriali, and fisica nucleare e impianti nucleari — and then an oral examination covering those subjects plus fisica tecnica, chimica, meccanica, workplace health and safety legislation, administrative, constitutional and EU law, and the organisation of the Ministero dell'Interno, with a foreign language chosen from English, French, Spanish or German and a check on IT skills. Each of the two stages needs at least 21/30. Successful candidates then undergo psycho-physical and aptitude assessment before appointment.

Time Limit

Not published in the bando; where a preselective test is held its duration is fixed by administrative notice (40 items in 60 minutes in the published banca dati editions).

Passing Score

The written paper and the oral examination each require at least 21/30; the merit ranking is the sum of the two marks.

Exam / Certification Fees

€0 (Free of charge)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

8% of this bank

Chimica e Ingegneria Chimica (Chemistry and Chemical Engineering)

Fundamentals of combustion chemistry, chemical equilibrium, stoichiometry, Lower and Upper Explosive Limits (LEL/UEL), minimum oxygen concentration, hazardous materials transport classifications, chemical spill neutralization, and emergency mitigation of industrial runaways and BLEVEs.

9% of this bank

Costruzioni Civili e Industriali (Civil and Industrial Construction)

Civil and industrial building elements, fire behavior of construction materials (structural steel, reinforced concrete, engineered timber), passive fire protection, REI fire resistance criteria, compartmentation barriers, smoke and heat exhaust systems (UNI 9494), and emergency egress sizing.

8% of this bank

Diritto Amministrativo (Administrative Law)

Administrative acts, public administrative procedures under Legge 241/1990, responsibilities of the procedimental officer, document access rights, nullity versus voidability (art. 21-septies and 21-octies), certified notice of activity (SCIA), self-redress (autotutela), and public contracts principles under D.Lgs. 36/2023.

8% of this bank

Legislazione Sociale e Norme sulla Sicurezza nei Luoghi di Lavoro (Social and Workplace Safety Legislation)

Italian occupational safety regulations under D.Lgs. 81/2008 (Testo Unico), statutory roles and non-delegable duties of employers, safety executives, workers' safety representatives (RLS), risk evaluation documentation (DVR), DUVRI interference risk assessment, and workplace fire decrees (DM 1, 2, 3 settembre 2021).

8% of this bank

Elettrotecnica (Electrical Engineering)

Principles of DC and AC circuit theory, three-phase systems, power factor correction, low-voltage distribution systems, earthing arrangements (TT, TN-S, TN-C, IT under CEI 64-8), circuit protection (RCDs, circuit breakers), emergency electrical feeds, and ATEX equipment design for explosive atmospheres.

8% of this bank

Fisica Nucleare e Radioprotezione (Nuclear Physics and Radiation Protection)

Atomic structure, radioactive decay processes (alpha, beta, gamma, neutron emission), half-life kinetics, radiometric units (Becquerel, Gray, Sievert), principles of radiation protection (justification, optimization ALARA, dose limits) under D.Lgs. 101/2020, and emergency radiological intervention protocols.

9% of this bank

Fisica Tecnica (Applied Technical Physics and Thermodynamics)

First and second laws of thermodynamics, closed and open flow systems, thermodynamic cycles (Carnot, Rankine, Brayton, refrigeration cycles), modes of heat transfer (Fourier conduction, Newton convection, Stefan-Boltzmann radiation), heat exchangers, psychrometry, and moist air properties.

9% of this bank

Idraulica (Hydraulics and Fluid Mechanics)

Hydrostatic pressure, Stevin's law, pressure center calculations on submerged gates, buoyant forces, fluid continuity, Bernoulli energy equation, friction head loss formulas (Darcy-Weisbach, Colebrook-White), pressurized firefighting water networks, sprinkler K-factor calculations, and water hammer transients.

8% of this bank

Macchine (Machinery and Fluid Power Systems)

Centrifugal and positive displacement pumps, pump performance curves, NPSH margins and cavitation prevention, series and parallel pump configurations, internal combustion engines (four-stroke Otto and Diesel cycles), air compressors, and hydraulic power machines.

8% of this bank

Meccanica (Applied Mechanics)

Static equilibrium of rigid bodies, Coulomb friction laws on horizontal and inclined planes, kinematic mechanisms, gear trains and speed transmission ratios, work-energy theorem, stopping distances, mass moments of inertia (parallel axis theorem), and hoists, winches, and lifting apparatus mechanics.

8% of this bank

Ordinamento del Ministero dell'Interno e del CNVVF (Interior Ministry & Fire Corps Statutory Framework)

Statutory charter of the Corpo Nazionale dei Vigili del Fuoco under D.Lgs. 139/2006, organisational structure of the Department, the Direzioni Regionali and the provincial Comandi, judicial police status under article 6, comma 2, of D.Lgs. 139/2006, career structure of the ruolo dei direttivi under D.Lgs. 217/2005, and fire prevention procedures under DPR 151/2011.

9% of this bank

Scienza e Tecnica delle Costruzioni (Theory and Technique of Structures)

Internal force and moment diagrams (axial force, shear force, bending moment), normal and shear stress analysis (Navier and Jourawsky formulas), Hooke's constitutive law, Euler elastic buckling of columns, reinforced concrete beam behavior (flexure and shear), and Limit State Design principles (NTC 2018).

Preparing for the Concorso Vice Direttore Vigili del Fuoco Exam

What You Need to Know

Passing score: The written paper and the oral examination each require at least 21/30; the merit ranking is the sum of the two marks.
Assessment: Where the twenty-times-the-posts threshold is reached, candidates first sit a computerised multiple-choice preselective test drawn from the official 12-subject banca dati; a number equal to ten times the posts, plus anyone tied with the last of them, goes forward with a minimum mark of 6/10. The examinations proper are one written paper — an essay or short structured answers on scienza e/o tecnica delle costruzioni plus three subjects the candidate chooses from elettrotecnica e impianti, ingegneria chimica e impianti chimici, macchine e meccanica applicata, idraulica e costruzioni idrauliche, costruzioni civili e industriali, and fisica nucleare e impianti nucleari — and then an oral examination covering those subjects plus fisica tecnica, chimica, meccanica, workplace health and safety legislation, administrative, constitutional and EU law, and the organisation of the Ministero dell'Interno, with a foreign language chosen from English, French, Spanish or German and a check on IT skills. Each of the two stages needs at least 21/30. Successful candidates then undergo psycho-physical and aptitude assessment before appointment.
Time limit: Not published in the bando; where a preselective test is held its duration is fixed by administrative notice (40 items in 60 minutes in the published banca dati editions).
Exam / certification fees: €0 (Free of charge) Official sources

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Concorso Vice Direttore Vigili del Fuoco: Suggested Study Strategy

1Review structural mechanics and Eurocode principles thoroughly: focus on Navier's bending formula, Jourawsky shear distribution, Euler column buckling critical load, and reinforced concrete section analysis under NTC 2018.

2Practice quantitative hydraulic calculations: memorize and apply Stevin's law, Torricelli's efflux velocity equation, the Darcy-Weisbach head loss relation, and sprinkler nozzle discharge formulas (Q = K * sqrt(P)).

3Master the fundamental thermodynamic cycles and heat transfer laws: Fourier conduction through multi-layer walls, Stefan-Boltzmann radiative transfer, Carnot cycle maximum efficiency, and psychrometric chart parameters.

4Study key Italian legislative frameworks: memorize the core provisions and distinctions of Legge 241/1990 (administrative procedure and access), D.Lgs. 81/2008 (workplace health and safety duties), D.Lgs. 139/2006 (Fire Corps mission and police powers), and D.Lgs. 217/2005 (officer career progression).

5Understand electrical grounding systems and explosion protection: differentiate between TT, TN-S, TN-C, and IT grounding systems under CEI 64-8 and master ATEX zone classifications (Zones 0, 1, and 2 for gases/vapors).

6Review nuclear radiation physics and ALARA protection: practice radioactive decay exponential calculations using half-lives, master dosimetric unit conversions (Bq, Gy, Sv), and know emergency shielding principles under D.Lgs. 101/2020.

Frequently Asked Questions

What is the official role and career track of Vice Direttore in the Vigili del Fuoco?

The qualification of vice direttore is the entry grade of the officer cadre (ruolo dei direttivi) of the Corpo Nazionale dei Vigili del Fuoco, established by Legislative Decree 217/2005. Under article 6, comma 2, of D.Lgs. 139/2006 direttivi hold the status of ufficiale di polizia giudiziaria; they lead technical and emergency response operations, carry out fire prevention functions, and serve across provincial commands and central directorates. Winners of the competition are first appointed vice direttori in prova for a twelve-month probationary period — nine months of residential training at the Istituto Superiore Antincendi (ISA) in Rome followed by three months of tirocinio tecnico-operativo at the Comandi — and are then confirmed in the ruolo dei direttivi as vice direttore. Promotion to direttore follows after two years of effective service in the grade (art. 146, D.Lgs. 217/2005).

What subjects are included in the official banca dati for the preselective test?

The official preselection item bank published by the Department comprises twelve distinct technical and legal subject files: Chimica e ingegneria chimica, Costruzioni civili e industriali, Diritto amministrativo, Legislazione sociale e norme sulla sicurezza nei luoghi di lavoro, Elettrotecnica, Fisica nucleare, Fisica tecnica, Idraulica, Macchine, Meccanica, Ordinamento del Ministero dell'Interno, and Scienza e tecnica delle costruzioni.

What degree and licensing qualifications are required to apply?

The bando requires a laurea magistrale in engineering or architecture — or a degree obtained under earlier Italian university rules and treated as equivalent — together with the professional practising qualification (abilitazione professionale) relating to that degree. The decree does not narrow the requirement to particular LM degree classes, so any laurea magistrale in engineering or architecture qualifies. Candidates must also be Italian citizens enjoying political rights, must not have turned 35 by the application deadline (raised by the length of military service actually performed, up to three further years), and must meet the physical, psychological and aptitude standards of D.M. 166/2019.

How does this practice bank adapt the official exam into English?

The official Italian competition is conducted in Italian. This 100-question practice bank is an independent English-language MCQ study adaptation developed by OpenExamPrep. It enables candidates to test their knowledge across all twelve official engineering, scientific, and statutory disciplines in English while preserving original Italian legislative names, decree citations, and technical terminology. It is an educational study aid and not an official paper simulation.

What happens after winning the competition?

Winners are appointed vice direttori in prova and serve a twelve-month probationary period under article 144 of D.Lgs. 217/2005: nine months of residential theoretical-practical training at the Istituto Superiore Antincendi (ISA) in Rome, followed by three months of tirocinio tecnico-operativo at the Comandi dei vigili del fuoco. An examination is sat at the end of the nine-month course, and the tirocinio ends with a judgment of fitness for institutional duties. Those declared fit take the oath and are confirmed in the ruolo dei direttivi with the qualification of vice direttore, ranked by the end-of-course graduatoria, and remain in their first posting for at least two years. Promotion to direttore comes later, on completing two years of effective service in the grade.