ENADE Engenharia Mecânica Practice Questions - ENADE Engenharia Mecânica - Exame Nacional de Desempenho dos Estudantes Exam - ENADE Engenharia Mecânica Practice Questions - ENADE Engenharia Mecânica - Exame Nacional de Desempenho dos Estudantes Exam

Question 1

According to Brazilian Federal Law No. 6,496/1977 and the regulations established by CONFEA/CREA, what is the legal nature and primary purpose of the Technical Responsibility Note (Anotação de Responsabilidade Técnica - ART)?

It serves exclusively as a tax receipt that collects municipal service taxes (ISS) on engineering consultations. It legally defines the contractual scope, identifies the professional and technical responsibility for the mechanical project or service, and constitutes the engineer's technical-professional collection (Acervo Técnico). It is a mandatory operating license issued by the Ministry of Labor that certifies machine safety compliance prior to municipal inspection. It functions as an insurance policy that automatically indemnifies third parties against mechanical failures without requiring proof of technical fault.

Correct Answer:

It legally defines the contractual scope, identifies the professional and technical responsibility for the mechanical project or service, and constitutes the engineer's technical-professional collection (Acervo Técnico).

Question 2

Under CONFEA Resolution No. 1,002/2002 (Code of Professional Ethics for Engineering), how should a mechanical engineer act when pressured by an employer to sign technical drawings and commissioning reports for a pressure vessel that was designed without observing applicable safety factors?

Sign the documentation while registering a confidential internal memorandum that disclaims responsibility in case of catastrophic burst. Delegate the signature to an engineering intern or non-registered mechanical technician to shield professional liability. Refuse to sign or endorse the technical documentation, formally alert the contracting party to the hazards, and abstain from executing unsafe engineering acts. Approve the documentation under the condition that hydrostatic pressure testing is waived to prevent plastic deformation.

Correct Answer:

Refuse to sign or endorse the technical documentation, formally alert the contracting party to the hazards, and abstain from executing unsafe engineering acts.

Question 3

Brazilian Regulatory Standard NR-12 (Safety in Machinery and Work Equipment) establishes safety architectures based on risk categories (ABNT NBR ISO 13849-1). Which characteristic specifically distinguishes a Category 4 safety circuit from lower categories?

A single component fault does not lead to the loss of the safety function, and the fault is detected at or before the next demand upon the safety function, or accumulation of undetected faults does not prevent safety action. The system relies entirely on single-channel electromechanical relays with periodic manual calibration intervals. Safety functions are integrated solely via software without hardware redundancy or positive-action electromechanical contacts. The occurrence of a single electrical short-circuit immediately permits machine cycling if an optical sensor is illuminated.

Correct Answer:

Question 4

Regarding emergency stop devices on industrial mechanical presses governed by NR-12 and ABNT NBR ISO 13850, what operational requirement must be satisfied when an emergency stop button is actuated?

It must stop the hazardous motion through the fastest feasible method without creating additional hazards, and releasing the button actuator must not automatically restart the machine. It must automatically reverse the stroke of the hydraulic ram to full top dead center at maximum operating speed. It must de-energize the entire manufacturing plant substation, interrupting critical ventilation and illumination networks. It must allow machine restart immediately upon releasing the mushroom push-button without requiring a secondary manual reset.

Correct Answer:

It must stop the hazardous motion through the fastest feasible method without creating additional hazards, and releasing the button actuator must not automatically restart the machine.

Question 5

A cylindrical compressed air receiver tank has an internal volume of $V = 4.0\text{ m}^3$ and operates at a maximum allowable working pressure of $P = 1.25\text{ MPa}$ ($12.5\text{ bar}$). Under Brazilian Regulatory Standard NR-13, what is its potential hazard category, knowing that air is classified as Fluid Group C (combustible/toxic fluids are Group A/B, inert/air are Group C/D)?

Category V, because compressed air is non-toxic and non-flammable regardless of the $P \cdot V$ product. Category I, because the operating pressure exceeds $1.0\text{ MPa}$. Category III, because the $P \cdot V$ product equals $5.0\text{ MPa}\cdot\text{m}^3$ (which is $\ge 2.5$ and $< 30$) and the fluid belongs to Group C. Category II, because any pressure vessel with volume greater than $1.0\text{ m}^3$ is automatically classified in Category II.

Correct Answer:

Category III, because the $P \cdot V$ product equals $5.0\text{ MPa}\cdot\text{m}^3$ (which is $\ge 2.5$ and $< 30$) and the fluid belongs to Group C.

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Prepare with the ENADE Engenharia Mecânica Practice Questions - ENADE Engenharia Mecânica - Exame Nacional de Desempenho dos Estudantes Exam practice quiz. This question bank includes 100 questions covering text, circ, stress, cdot, and heat. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ENADE Engenharia Mecânica Practice Questions - ENADE Engenharia Mecânica - Exame Nacional de Desempenho dos Estudantes Exam

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ENADE Engenharia Mecânica Practice Questions - ENADE Engenharia Mecânica - Exame Nacional de Desempenho dos Estudantes Exam

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