Encceja Ensino Médio Practice Questions - Exame Nacional para Certificação de Competências de Jovens e Adultos - Ensino Médio Exam - Encceja Ensino Médio Practice Questions - Exame Nacional para Certificação de Competências de Jovens e Adultos

Question 1

A family in São Paulo is analyzing their monthly electric energy bill to identify ways to reduce costs. They notice that an electric shower with a nominal power rating of 5,500 W (5.5 kW) is used for a total of 1 hour per day (combining all four family members' showers). In contrast, a 200 W (0.2 kW) refrigerator operates intermittently, with its compressor running for an effective total of 10 hours per day. Considering a 30-day month, which appliance consumes more monthly electrical energy, and what is its total monthly consumption in kilowatt-hours (kWh)?

The refrigerator consumes more energy, with a total of 180 kWh per month. The electric shower consumes more energy, with a total of 165 kWh per month compared to 60 kWh for the refrigerator. Both appliances consume the exact same amount of energy, totaling 120 kWh each per month. The refrigerator consumes more energy, with a total of 300 kWh per month compared to 55 kWh for the shower.

Correct Answer:

The electric shower consumes more energy, with a total of 165 kWh per month compared to 60 kWh for the refrigerator.

Question 2

In a municipal Water Treatment Plant (Estação de Tratamento de Água - ETA), raw water drawn from a river undergoes several sequential chemical and physical processes to become safe for human consumption. During this process, aluminum sulfate is added to aggregate suspended impurities into heavier clumps, which subsequently settle to the bottom of large settling basins. Which sequential stages of water treatment are described by these two actions, respectively?

Filtration and Chlorination Aeration and Fluoridation Coagulation/Flocculation and Decantation Distillation and Neutralization

Correct Answer:

Coagulation/Flocculation and Decantation

Question 3

A thermal flask (garrafa térmica) is engineered to keep hot liquids warm and cold liquids chilled for extended periods by minimizing the three physical mechanisms of heat transfer: conduction, convection, and radiation. Which specific design feature of the thermal flask is primarily responsible for preventing heat transfer by radiation?

The internal mirrored (silvered) double glass walls, which reflect thermal infrared waves back into the liquid The tight rubber or plastic stopper at the top, which blocks fluid circulation The partial vacuum between the double glass walls, which eliminates molecular collisions The rigid protective outer plastic casing, which provides structural impact resistance

Correct Answer:

The internal mirrored (silvered) double glass walls, which reflect thermal infrared waves back into the liquid

Question 4

A resident decides to install decorative lighting in their backyard. If they connect three identical 127 V light bulbs in series across a 127 V household power source instead of connecting them in parallel, what will be the observed operational outcome?

Each bulb will receive 127 V and shine with its maximum rated brightness. The bulbs will immediately burn out because the total electric current will triple. Two bulbs will shine normally, but the third bulb will receive no electrical current. Each bulb will receive approximately 42.3 V (one-third of the voltage) and will glow very dimly; if one bulb is removed, all three will turn off.

Correct Answer:

Each bulb will receive approximately 42.3 V (one-third of the voltage) and will glow very dimly; if one bulb is removed, all three will turn off.

Question 5

A rural worker in Minas Gerais is bitten by a venomous pit viper (jararaca). At the local emergency health post, the attending medical team immediately administers specific antivenom (soro antiofídico). What fundamental immunological difference distinguishes the therapeutic action of an antivenom serum (soro) from a preventative vaccine (vacina)?

A vaccine delivers pre-formed active antibodies for immediate cure, whereas a serum stimulates the patient's body to slowly create memory cells. A serum provides ready-made, pre-formed antibodies for immediate passive immunization against acute toxins, whereas a vaccine introduces antigens to stimulate active antibody and memory cell production for long-term protection. A serum contains weakened antigens that provide lifelong immunity, whereas a vaccine consists of synthetic antibiotics that kill bacteria. Both serums and vaccines work identically by administering heavy doses of broad-spectrum chemical antibiotics directly into the bloodstream.

Correct Answer:

A serum provides ready-made, pre-formed antibodies for immediate passive immunization against acute toxins, whereas a vaccine introduces antigens to stimulate active antibody and memory cell production for long-term protection.

Question 1

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Prepare with the Encceja Ensino Médio Practice Questions - Exame Nacional para Certificação de Competências de Jovens e Adultos - Ensino Médio Exam practice quiz. This question bank includes 99 questions covering brazilian, brazil, physical, primary, and water. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Encceja Ensino Médio Practice Questions - Exame Nacional para Certificação de Competências de Jovens e Adultos - Ensino Médio Exam

This practice set contains 99 questions from the matching question bank and focuses on brazilian, brazil, physical, primary, and water. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

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Encceja Ensino Médio Practice Questions - Exame Nacional para Certificação de Competências de Jovens e Adultos - Ensino Médio Exam

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