Free Practice Questions for USAC Odontología Específica

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Key Facts: USAC Odontología Específica Exam

3 tests

FOUSAC divides its Prueba Específica into Habilidades Específicas, Ciencias Naturales y Exactas, and Habilidad Psicomotora

Facultad de Odontología, USAC — Pruebas Específicas

3 guides

FOUSAC publishes official topic guides in Química, Biología, and Física Matemática

FOUSAC Guía Temática, Prueba Específica 2026

1 hour

Published maximum duration of the Prueba de Habilidad Psicomotora

FOUSAC Prueba de Habilidad Psicomotora — Materiales

Q0.00

University regulation prohibits any fee for the Pruebas Específicas

Reglamento del SUN, artículo 55

2 years

Validity period of a satisfactory specific test result

Reglamento del SUN, artículo 43

5 PCB

FOUSAC requires a constancia showing all five Pruebas de Conocimientos Básicos passed

FOUSAC — Requisitos de inscripción

M1, M3, M4

Testing is administered at Edificios M1, M3, and M4 at Ciudad Universitaria, zona 12

FOUSAC Directory

The USAC Odontología (FOUSAC) Prueba Específica is delivered in two stages and three tests: a Prueba de Habilidades Específicas, a Prueba de Ciencias Naturales y Exactas built as a multiple-choice test over the faculty's published Química, Biología and Física Matemática guides, and a Prueba de Habilidad Psicomotora lasting at most one hour. Applicants need a valid Tarjeta de Orientación Vocacional with its results profile and a constancia showing all five SUN basic tests passed. Sitting the tests is free under artículo 55 del Reglamento del SUN, results are emailed to each applicant, and a satisfactory result is valid for two years. The official tests are administered in Spanish, and this 100-question bank is an English-language MCQ study adaptation of the published academic guides — not an official translation and not a substitute for the abilities or psychomotor components.

Sample USAC Odontología Específica Practice Questions

Try these sample questions to review concepts for the USAC Odontología Específica exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which International System (SI) base unit is correctly paired with the physical quantity it measures?

A.Mass — gram (g)

B.Temperature — degree Celsius (°C)

C.Amount of substance — mole (mol)

D.Volume — liter (L)

Explanation: The SI base unit for amount of substance is the mole (mol). The SI system recognizes seven fundamental base units: meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (thermodynamic temperature), mole (amount of substance), and candela (luminous intensity).

2A student measures a sample of dental amalgam alloy with a mass of 48.0 g that occupies a volume of 4.0 cm³. What is the density of the sample in g/cm³?

A.12 g/cm³

B.0.083 g/cm³

C.52 g/cm³

D.192 g/cm³

Explanation: Density is calculated using the formula d = m / V. Dividing mass (48.0 g) by volume (4.0 cm³) yields 12 g/cm³ (or 1.2 × 10¹ g/cm³ adhering to two significant figures).

3A clinical autoclave sterilizer operates at 121 °C. What is this operating temperature expressed on the Kelvin scale?

A.-152 K

B.212 K

C.415 K

D.394 K

Explanation: To convert degrees Celsius to kelvins, add 273.15 (or 273 in general practice): T(K) = T(°C) + 273.15 = 121 + 273.15 = 394.15 K, which rounds to 394 K.

4How many significant figures are present in the measurement 0.004050 kg?

A.3

B.4

C.6

D.7

Explanation: In 0.004050 kg, the leading zeros (0.00) serve only as placeholders to locate the decimal point and are not significant. The non-zero digits '4' and '5', the captive zero between them, and the trailing zero following the '5' in a decimal number are all significant, giving a total of 4 significant figures.

5Four repeated laboratory titrations yield volumes of 24.51 mL, 24.50 mL, 24.52 mL, and 24.51 mL. The true equivalence point volume is 28.30 mL. Which statement best describes these results?

A.High accuracy and high precision

B.High accuracy and low precision

C.Low accuracy and high precision

D.Low accuracy and low precision

Explanation: Precision refers to the closeness of repeated measurements to each other, whereas accuracy refers to how close the measured average is to the true or accepted value. Because the four values are clustered within ±0.01 mL of each other, precision is high. However, because they are nearly 3.8 mL away from the true value of 28.30 mL, accuracy is low.

6Using dimensional analysis, how many milligrams (mg) are contained in 0.075 grams (g)?

A.0.000075 mg

B.0.75 mg

C.750 mg

D.75 mg

Explanation: Using the conversion factor 1 g = 1,000 mg, multiply 0.075 g by (1,000 mg / 1 g) to obtain 75 mg.

7A student performs the calculation (12.45 g + 0.322 g) / 2.5 mL. Following the rules of significant figures, what is the properly rounded answer?

A.5.1 g/mL

B.5.1088 g/mL

C.5.11 g/mL

D.5.109 g/mL

Explanation: First, the addition in the numerator (12.45 + 0.322 = 12.772 g) is limited to two decimal places (matching 12.45), giving 12.77 g with four significant figures. Next, dividing 12.77 g by 2.5 mL (which has two significant figures) limits the final quotient to two significant figures: 12.77 / 2.5 = 5.108... which rounds to 5.1 g/mL.

8Which of the following describes an intensive physical property of matter?

A.Volume of an alginate impression

B.Boiling point of pure ethanol

C.Mass of a gold inlay

D.Total thermal energy stored in a water bath

Explanation: An intensive property is independent of the amount of substance present in the sample. Boiling point, melting point, density, and color are intensive properties. Mass, volume, length, and total thermal energy are extensive properties because their values depend directly on sample size.

9Which process represents a chemical change rather than a physical change?

A.Dissolving sodium chloride in distilled water

B.Melting paraffin wax during dental carving

C.Sublimation of iodine crystals upon gentle heating

D.Oxidation of copper wire exposed to air and acid

Explanation: Oxidation of copper involves breaking and forming chemical bonds to produce new chemical substances (copper oxides/salts) with different identities, making it a chemical change. Dissolution, melting, and sublimation are physical changes because the molecular identity of the substance is preserved.

10Which example is classified as a homogeneous mixture (solution)?

A.Dental plaster suspension before setting

B.Granite countertop stone

C.Saline mouth rinse (0.9% NaCl in water)

D.Fresh blood with settling cellular elements

Explanation: A homogeneous mixture has a completely uniform composition and visual appearance throughout down to the molecular level. A 0.9% NaCl saline solution consists of completely dissolved sodium and chloride ions evenly distributed in water, forming a single phase.

About the USAC Odontología Específica Exam

The Prueba Específica of the Facultad de Odontología at the Universidad de San Carlos de Guatemala (FOUSAC) is the faculty-specific entrance assessment for the Cirujano Dentista degree program, administered at Edificios M1, M3 and M4, Ciudad Universitaria, zona 12, Guatemala City.

Exam sponsor: Facultad de Odontología, Universidad de San Carlos de Guatemala (FOUSAC). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Two-stage faculty assessment made up of three tests: Prueba de Habilidades Específicas, Prueba de Ciencias Naturales y Exactas (multiple choice, covering razonamiento matemático, química y biología), and Prueba de Habilidad Psicomotora.

Time Limit

A maximum of 1 hour is published for the Prueba de Habilidad Psicomotora. No duration is published for the other two tests; the place, time and room are emailed to each applicant one or two days beforehand.

Passing Score

Results are emailed to each applicant by FOUSAC; the faculty does not publish a numeric cutoff.

Exam / Certification Fees

Q0.00. Under artículo 55 del Reglamento del SUN, charging for Pruebas Específicas is prohibited; the Q70.00 Orientación Vocacional payment is the only reglamented charge in the process.

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.

Practice-bank coverage: 33 of 100 questions, covering measurements, matter, elements and atoms, the periodic table, and nomenclature.

Guía Temática de Química (Chemistry Topic Guide)

Volume, mass and density measurement and conversion, the F/C/K temperature scales, classification of matter, physical and chemical changes, the law of conservation of mass, element names and symbols, Dalton's atomic models, isotopes and atomic masses, periodic law, families and periods, metals and metalloids, ions, molar mass calculation, oxidation numbers, and nomenclature in the Clásico, Estequiométrico and Stock systems.

Practice-bank coverage: 35 of 100 questions, covering life characteristics, classification, water and pH, organic molecules, the cell, and Mendelian genetics.

Guía Temática de Biología (Biology Topic Guide)

Characteristics of living organisms, reinos de la naturaleza, organisation of matter (atoms, molecules, chemical bonds, ions), water and its importance for the cell, carbohydrates, lipids, proteins and nucleic acids, the concept of pH, environmental impact on living things, the cell and its classification, and the bases of Mendelian genetics.

Practice-bank coverage: 32 of 100 questions, covering operations, exponents, radicals, proportions, polynomials, factoring, and scientific notation.

Guía Temática de Física Matemática (Mathematical Physics Topic Guide)

Hierarchy of operations, powers and exponent laws, radicals and their properties, simple direct and inverse rule of three, polynomial arithmetic, factoring in all cases, and scientific notation worked by hand.

Preparing for the USAC Odontología Específica Exam

What You Need to Know

Passing score: Results are emailed to each applicant by FOUSAC; the faculty does not publish a numeric cutoff.
Assessment: Two-stage faculty assessment made up of three tests: Prueba de Habilidades Específicas, Prueba de Ciencias Naturales y Exactas (multiple choice, covering razonamiento matemático, química y biología), and Prueba de Habilidad Psicomotora.
Time limit: A maximum of 1 hour is published for the Prueba de Habilidad Psicomotora. No duration is published for the other two tests; the place, time and room are emailed to each applicant one or two days beforehand.
Exam / certification fees: Q0.00. Under artículo 55 del Reglamento del SUN, charging for Pruebas Específicas is prohibited; the Q70.00 Orientación Vocacional payment is the only reglamented charge in the process. Official sources

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USAC Odontología Específica: Suggested Study Strategy

1Work through the three official guides systematically: Química, Biología, and Física Matemática are all represented on the Ciencias Naturales y Exactas test.

2Practise chemical nomenclature across all three systems named in the guide — Clásico, Estequiométrico and Stock — for both binary and ternary inorganic compounds.

3Drill molar mass calculation to two figures and oxidation-number assignment, both of which the chemistry guide lists explicitly.

4In biology, work from the guide's own sequence: characteristics of living things, reinos de la naturaleza, water, organic molecules, pH, the cell and its classification, and the bases of Mendelian genetics.

5In física matemática, master PEMDAS order of operations, radical simplification, and denominator rationalization without relying on a calculator — the guide specifies scientific notation solved by hand.

6Work through direct and inverse rule of three word problems to ensure rapid, accurate arithmetic on proportional relationships.

7Assemble the psychomotor materials in advance — black pen, pencil and sharpener, 30 cm ruler, medium scissors, transparent zippered bag, and two letter-size sheets of 120 g paper — because materials cannot be borrowed during the test.

8Watch the email address you registered at inscription: FOUSAC sends the place, time and room one or two days before the sitting, and the results afterwards.

Frequently Asked Questions

What is the USAC Odontología Prueba Específica?

It is the faculty-specific admission assessment administered by the Facultad de Odontología (FOUSAC) of the Universidad de San Carlos de Guatemala for candidates applying to the Cirujano Dentista professional degree. FOUSAC divides it into two stages and three tests: Habilidades Específicas, Ciencias Naturales y Exactas, and Habilidad Psicomotora.

Which basic tests (PCB) are required before FOUSAC specific testing?

FOUSAC requires a constancia showing that all five Pruebas de Conocimientos Básicos have been passed, together with the Tarjeta de Orientación Vocacional and the results profile of the vocational interest inventory.

What subjects and topics are evaluated on the science test?

FOUSAC publishes three guías temáticas for the Prueba de Ciencias Naturales y Exactas: Química (fundamental measurements, matter, elements and atoms, the periodic table, nomenclature), Biología (characteristics of living things, reinos de la naturaleza, organisation of matter, water, organic molecules, pH, environmental impact, the cell and its classification, and the bases of Mendelian genetics), and Física Matemática (order of operations, powers and exponents, radicals, simple rule of three, polynomials, factoring, scientific notation).

What is the psychomotor ability test, and what do I need to bring?

The Prueba de Habilidad Psicomotora is taken after the Ciencias Naturales y Exactas test and diagnoses the coordination between sensory information and muscular response, fine and gross. FOUSAC publishes a maximum duration of 1 hour and a materials list: a black pen, a pencil and sharpener, a 30 cm ruler, medium scissors, a transparent zippered bag, and two letter-size sheets of 120 g paper. Materials cannot be borrowed during the test, and no one is admitted once the room door has been closed.

How much does the FOUSAC Prueba Específica cost?

There is no fee for the tests themselves. Artículo 55 del Reglamento del Sistema de Ubicación y Nivelación (SUN) prohibits any charge for basic or specific entrance tests, including the materials required for them. The single Q70.00 Orientación Vocacional order of payment is the only reglamented charge in the process.

How long is a satisfactory result valid?

Under artículo 43 del Reglamento del SUN, a satisfactory result on a USAC Prueba Específica remains valid for two years from its date of publication.

Where is the examination administered and how are results delivered?

The evaluations take place at the Facultad de Odontología facilities in Edificios M1, M3, and M4, Ciudad Universitaria, zona 12, Guatemala City. The place, time and room are emailed to the address registered at inscription one or two days beforehand, and the results are sent to that same address.

Is this practice question bank an official FOUSAC publication?

No. This question bank is an independent English-language MCQ study adaptation developed by OpenExamPrep from FOUSAC's published guías temáticas. The official tests are administered in Spanish by FOUSAC. It reinforces the academic knowledge tested by the Ciencias Naturales y Exactas component and is not a substitute for the abilities or psychomotor components.