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Exam Review

Key Facts: EGEL Plus Ingeniería en Alimentos Exam

216

Total items on the official EGEL Plus IALI (156 disciplinary + 60 transversal)

Ceneval, Guía para el sustentante EGEL Plus IALI

9 hours

Two sessions of 4.5 hours each on the same day

Ceneval, Guía para el sustentante EGEL Plus IALI

1000

Minimum Índice Ceneval for a Satisfactorio level in an area or section

Ceneval, Guía para el sustentante EGEL Plus IALI

1150

Minimum Índice Ceneval for a Sobresaliente level

Ceneval, Guía para el sustentante EGEL Plus IALI

MXN 1,885

Individual national Examen desde casa fee in 2026

Ceneval EGEL portal

Ceneval's EGEL Plus IALI is a 216-item, nine-hour Spanish exit exam: 156 disciplinary items in four areas plus 60 transversal language and communication items.

Sample EGEL Plus Ingeniería en Alimentos Practice Questions

Try these sample questions to review concepts for the EGEL Plus Ingeniería en Alimentos exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A single-effect falling film evaporator is fed with 1,000 kg/h of clarified tomato juice containing 5.0% total soluble solids by mass. The product stream leaving the evaporator is concentrated to 30.0% total solids. Operating under steady-state conditions with no solids loss in the vapor, what is the rate of water evaporated (W) from the juice?
A.166.7 kg/h
B.833.3 kg/h
C.500.0 kg/h
D.950.0 kg/h
Explanation: A steady-state mass balance on total solids gives F·x_F = P·x_P, so (1,000 kg/h)(0.05) = P(0.30), yielding a concentrated product rate P = 50 / 0.30 = 166.7 kg/h. The overall total mass balance is F = P + W, which means the evaporation rate is W = F - P = 1,000 - 166.7 = 833.3 kg/h of pure water vapor removed.
2A freeze-concentration unit receives 500 kg/h of clarified apple juice containing 12.0 °Brix (12.0% dissolved solids). The crystallization system separates pure ice crystals, discharging a concentrated juice stream containing 48.0 °Brix. Assuming steady-state operation and zero solute entrapment in the ice wash column, what is the discharge rate of concentrated juice (P)?
A.60 kg/h
B.375 kg/h
C.125 kg/h
D.250 kg/h
Explanation: Performing a component mass balance on the soluble solids across the entire freeze-concentration boundary yields F·z_F = P·x_P + I·y_I. Since pure ice contains no solutes (y_I = 0), (500 kg/h)(0.12) = P(0.48) + 0, which gives P = 60 / 0.48 = 125 kg/h of concentrate. The remaining 375 kg/h exits as frozen water crystals.
3In thermal bacteriology and food preservation kinetics, what is the fundamental definition of the decimal reduction time (D-value)?
A.The heating time required at a specific constant temperature to destroy 90% of a microbial population (a 1-log cycle reduction)
B.The temperature increase required to reduce the thermal death time of a target microorganism by a factor of 10
C.The total equivalent minutes at 121.1 °C required to deliver a commercial sterilization process
D.The time needed at any processing temperature to reduce the surviving bacterial spore count to exactly zero
Explanation: The D-value (decimal reduction time) is the exposure time in minutes at a given constant temperature required to reduce the viable population of a specific microorganism by 90%, which corresponds to a 1.0 log10 survival drop. It reflects the slope of the semi-logarithmic survivor curve: D = (t2 - t1) / (log N1 - log N2).
4A canned low-acid vegetable product contains an initial population of 1.0 × 10⁴ spores of Clostridium botulinum per can. The commercial process targets a 12-decimal reduction (12D process), reducing the contamination risk to 1.0 × 10⁻⁸ spores per container. If D121.1 °C for C. botulinum spores is 0.21 minutes, what is the required thermal lethality value (F0)?
A.0.84 minutes
B.1.68 minutes
C.12.00 minutes
D.2.52 minutes
Explanation: Thermal lethality F0 represents the process time at reference temperature 121.1 °C and is calculated as F0 = D121.1·[log(N0) - log(N)]. For a standard 12D cook: F0 = 0.21 min × [log(10⁴) - log(10⁻⁸)] = 0.21 min × [4 - (-8)] = 0.21 min × 12 = 2.52 minutes. This 2.52-minute threshold represents the benchmark minimum commercial sterility cook for low-acid canned foods.
5During a thermal death time study on Geobacillus stearothermophilus spores, the decimal reduction time is measured as D105 °C = 50.0 minutes and D115 °C = 5.0 minutes. What is the z-value for these bacterial spores?
A.5.0 °C
B.10.0 °C
C.15.0 °C
D.20.0 °C
Explanation: The z-value is the temperature increase required to reduce the D-value by 90% (one log cycle). It is determined by the equation z = (T2 - T1) / [log(D1) - log(D2)] = (115 - 105) / [log(50.0) - log(5.0)] = 10 / [log(50/5)] = 10 / log(10) = 10 / 1 = 10.0 °C.
6A continuous plate pasteurizer heats 2,000 kg/h of whole fluid milk (specific heat capacity Cp = 3.90 kJ/kg·°C) from an inlet temperature of 4.0 °C to a pasteurization holding temperature of 72.0 °C. What is the required rate of thermal heat transfer (Q) supplied to the milk in this heating section?
A.73.7 kW (265,200 kJ/h)
B.294.7 kW (1,060,800 kJ/h)
C.147.3 kW (530,400 kJ/h)
D.530.4 kW (1,909,440 kJ/h)
Explanation: Sensible heat duty is calculated via Q = m·Cp·ΔT. Substituting values: Q = (2,000 kg/h)(3.90 kJ/kg·°C)(72.0 - 4.0 °C) = 2,000 × 3.90 × 68.0 = 530,400 kJ/h. Converting to kilowatts (1 kW = 1 kJ/s = 3,600 kJ/h): Q = 530,400 / 3,600 = 147.33 kW.
7A counter-current shell-and-tube heat exchanger cools refined vegetable oil from 120.0 °C to 50.0 °C using chilled water that enters at 15.0 °C and exits at 35.0 °C. What is the Logarithmic Mean Temperature Difference (LMTD) for this heat exchanger configuration?
A.56.4 °C
B.60.0 °C
C.46.3 °C
D.70.0 °C
Explanation: In counter-current flow, the hot fluid enters at Th1 = 120 °C and exits at Th2 = 50 °C, while cold water enters opposite at Tc1 = 15 °C and leaves at Tc2 = 35 °C. The terminal temperature differences are ΔT1 = Th1 - Tc2 = 120 - 35 = 85 °C and ΔT2 = Th2 - Tc1 = 50 - 15 = 35 °C. The LMTD is (ΔT1 - ΔT2) / ln(ΔT1 / ΔT2) = (85 - 35) / ln(85 / 35) = 50 / ln(2.4286) = 50 / 0.8873 = 56.35 °C ~ 56.4 °C.
8During continuous thermal processing of dairy products in a plate heat exchanger, denaturation of whey proteins and mineral precipitation form an insoluble layer (milk stone fouling) on the heat transfer plates. How does this fouling layer impact the overall heat transfer coefficient (U) and the pressure drop (ΔP) across the plates?
A.U increases due to increased surface roughness, while ΔP remains unchanged
B.U remains constant because plate geometry is fixed, while ΔP decreases
C.U decreases, but ΔP also decreases due to laminar boundary layer dampening
D.U decreases due to added conductive thermal resistance, while ΔP increases due to channel constriction
Explanation: Fouling introduces an additional conductive thermal resistance layer (Rf), reducing the overall heat transfer coefficient according to 1/U = 1/U_clean + Rf. Concurrently, the accumulated solid deposits constrict the cross-sectional hydraulic flow channels between corrugated plates, increasing friction factor and fluid velocity, which sharply raises the pumping pressure drop (ΔP).
9Plank's equation estimates the freezing time (tf) of an infinite slab of food as tf = [ρ·ΔHf / (Tf - T_inf)] · [P·a / h + R·a² / k], where 'a' is slab thickness, 'h' is surface convective heat transfer coefficient, and 'k' is thermal conductivity of the frozen layer. If the slab thickness 'a' is doubled (2a) while all other thermal properties and boundary conditions remain unchanged, how does the internal conductive resistance term (R·a² / k) change?
A.It doubles (increases by a factor of 2)
B.It quadruples (increases by a factor of 4)
C.It increases eightfold (increases by a factor of 8)
D.It remains constant because shape factor R is invariant
Explanation: In Plank's equation, the internal heat conduction through the growing frozen shell is proportional to the square of the characteristic dimension (a²). Doubling the thickness from a to 2a scales the term (2a)² = 4a², resulting in a fourfold (400%) increase in the internal conductive resistance term.
10In convective hot-air tray drying of mango slices, ambient air at 25.0 °C and 60% relative humidity is passed across an indirect steam heater coil before entering the drying chamber. If sensible heat is added without adding or removing moisture vapor, how do the dry-bulb temperature, relative humidity, and absolute humidity (humidity ratio) of the air change?
A.Dry-bulb temperature increases, relative humidity increases, and absolute humidity increases
B.Dry-bulb temperature increases, relative humidity remains constant, and absolute humidity decreases
C.Dry-bulb temperature increases, relative humidity decreases, and absolute humidity remains constant
D.Dry-bulb temperature decreases, relative humidity decreases, and absolute humidity remains constant
Explanation: Sensible heating moves horizontally to the right on a psychrometric chart. Dry-bulb temperature increases due to thermal energy input, absolute humidity (mass of water vapor per kg dry air) remains completely unchanged because no moisture is added or condensed, and relative humidity decreases sharply because the saturation vapor pressure of warmer air is significantly higher.

About the EGEL Plus Ingeniería en Alimentos Exam

Independent EGEL Plus Ingeniería en Alimentos practice by OpenExamPrep. The official Ceneval examination is in Spanish and has 216 items, mostly three-option multiple choice: 156 disciplinary items in Procesos alimentarios y operaciones unitarias, Desarrollo de productos alimentarios, Gestión de la calidad alimentaria, and Análisis de los alimentos, and 60 transversal Lenguaje y Comunicación items. This bank is an English-language study adaptation with four-option multiple-choice questions, not an official translation or format simulation. Disciplinary stems and explanations are in English. Language and communication items keep their Spanish passages and answer options, because Spanish usage is the skill being tested, and give their instructions and explanations in English.

Exam sponsor: Centro Nacional de Evaluación para la Educación Superior (Ceneval). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

216 items, mostly three-option multiple choice: 156 disciplinary items (Procesos alimentarios y operaciones unitarias 49, Desarrollo de productos alimentarios 41, Gestión de la calidad alimentaria 31, Análisis de los alimentos 35) and 60 transversal items in Comprensión Lectora and Redacción Indirecta.

Time Limit

Two sessions of 4.5 hours each on the same day (9 hours in total)

Passing Score

Each area and each section is reported on the Índice Ceneval (700-1300): 700-999 Aún no satisfactorio, 1000-1149 Satisfactorio, 1150-1300 Sobresaliente. The global result is weighted toward the disciplinary section: Satisfactorio or better there earns at least a Testimonio de Desempeño Satisfactorio, and a Testimonio de Desempeño Sobresaliente requires Sobresaliente in the disciplinary section and at least Satisfactorio in Lenguaje y Comunicación

Exam / Certification Fees

MXN 1,885 for the 2026 national Examen desde casa; institutional administrations may charge a different amount

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.

49 of 156 disciplinary items

Procesos alimentarios y operaciones unitarias

Mass and energy balances and transport phenomena (10), unit operations (15), food transformation, storage and preservation processes (14), and plant design and layout (10)

41 of 156 disciplinary items

Desarrollo de productos alimentarios

Market, trend and feasibility analysis (10), food and packaging science and technology (11), current regulations for product development (10), and nutrition and functional foods (10)

31 of 156 disciplinary items

Gestión de la calidad alimentaria

Quality management systems (17) and statistical tools for data analysis and quality control (14)

35 of 156 disciplinary items

Análisis de los alimentos

Physicochemical, chemical and proximate analysis (16), microbiological analysis (10) and sensory analysis (9)

60 of 216 total items

Lenguaje y Comunicación

Reading comprehension of academic, literary and public-interest texts (30 items) and indirect writing, which asks candidates to choose the version of a text that is correct, coherent and well punctuated (30 items)

Preparing for the EGEL Plus Ingeniería en Alimentos Exam

What You Need to Know

  • Passing score: Each area and each section is reported on the Índice Ceneval (700-1300): 700-999 Aún no satisfactorio, 1000-1149 Satisfactorio, 1150-1300 Sobresaliente. The global result is weighted toward the disciplinary section: Satisfactorio or better there earns at least a Testimonio de Desempeño Satisfactorio, and a Testimonio de Desempeño Sobresaliente requires Sobresaliente in the disciplinary section and at least Satisfactorio in Lenguaje y Comunicación
  • Assessment: 216 items, mostly three-option multiple choice: 156 disciplinary items (Procesos alimentarios y operaciones unitarias 49, Desarrollo de productos alimentarios 41, Gestión de la calidad alimentaria 31, Análisis de los alimentos 35) and 60 transversal items in Comprensión Lectora and Redacción Indirecta.
  • Time limit: Two sessions of 4.5 hours each on the same day (9 hours in total)
  • Exam / certification fees: MXN 1,885 for the 2026 national Examen desde casa; institutional administrations may charge a different amount Official sources

Using Our Practice Resources

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EGEL Plus Ingeniería en Alimentos: Suggested Study Strategy

1Practice food process calculations: mass balances with recycle, bypass and purge, heat exchange (Q = m·Cp·ΔT = U·A·LMTD), and thermal process kinetics (D-value, z-value, F0).
2Learn the NOM-051-SCFI/SSA1-2010 front-of-pack warning criteria and precautionary legends, and the hygiene requirements of NOM-251-SSA1-2009, both cited in the official guide's bibliography.
3Master HACCP and ISO 22000 concepts: the seven principles, critical limits, OPRPs versus CCPs, and validation versus verification.
4Review food analysis methods: Kjeldahl protein with the right nitrogen factor, fat extraction, moisture and ash, microbiological counts and Salmonella detection, and sensory discrimination and acceptance tests.
5Prepare for Lenguaje y Comunicación by reading academic articles, essays and public notices in Spanish, and by reviewing agreement, punctuation, accentuation and connectors.

Frequently Asked Questions

What is the EGEL Plus Ingeniería en Alimentos?

The EGEL Plus Ingeniería en Alimentos (EGEL Plus IALI) is Ceneval's national exit examination for graduates of the Licenciatura en Ingeniería en Alimentos and related programs. It measures the knowledge and skills considered indispensable at the end of the degree, plus Spanish reading comprehension and indirect writing. Institutions may use the result as a graduation requirement, a titulación option or part of a course grade, under their own rules; a Testimonio does not by itself determine the award of the degree or the cédula profesional.

How many questions are on the official EGEL Plus IALI and how long is it?

The official exam has 216 items: 156 disciplinary items (Procesos alimentarios y operaciones unitarias 49, Desarrollo de productos alimentarios 41, Gestión de la calidad alimentaria 31, Análisis de los alimentos 35) and 60 Lenguaje y Comunicación items (30 reading comprehension and 30 indirect writing). It is given on one day in two sessions of 4.5 hours each (9 hours). About 15% of the items are pilot items that do not count toward the result.

How is the EGEL Plus IALI scored?

Each area and section is reported on the Índice Ceneval from 700 to 1300: 700-999 Aún no satisfactorio, 1000-1149 Satisfactorio and 1150-1300 Sobresaliente. The global result follows a conjunctive rule weighted toward the disciplinary section: Satisfactorio or better in the disciplinary section earns at least a Testimonio de Desempeño Satisfactorio, while a Testimonio de Desempeño Sobresaliente requires Sobresaliente in the disciplinary section and at least Satisfactorio in Lenguaje y Comunicación. Candidates with a global Sobresaliente who take the exam for the first time within one year of finishing the degree are eligible for the Premio Ceneval al Desempeño de Excelencia-EGEL.

Can I use a calculator or formula sheet on the EGEL Plus IALI?

Yes. The official guide allows a non-programmable scientific calculator, which may not be shared between candidates, and a formulario (formula sheet) is available on the exam platform. Ceneval publishes the formulario on its EGEL portal, so you can study with it in advance.

Why is this practice bank in English if the official exam is in Spanish?

The official Ceneval exam is in Spanish. This bank is an independent English-language study adaptation with four-option questions, not an official translation or format simulation. Disciplinary questions and explanations are in English so you can review the engineering content. Language and communication items keep their Spanish passages and options because they test Spanish usage, and their instructions and explanations are in English.

Which standards and references does the official guide cite?

The guide's suggested bibliography includes Codex Alimentarius texts, ISO 22000 and ISO 9001, several NMX-F methods of analysis, and Mexican standards such as NOM-051-SCFI/SSA1-2010 (labeling), NOM-251-SSA1-2009 (hygiene practices) and NOM-210-SSA1-2014 (microbiological test methods). This bank practices those topics in English.