100+ Free ENADE Engenharia Química Practice Questions

Professional ethics, legislation, safety and sustainability

Professional conduct and legal duties drawn from the Componente Específico's 'normativas associadas à legislação profissional': the CONFEA/CREA Código de Ética (Resolução 1.002/2002) and ART registration under Lei nº 5.194/1966 and Resolução 1.025/2009, process hazard analysis (HAZOP guide words, LOPA independent protection layers, fault tree analysis), pressure equipment relief requirements under NR-13, occupational exposure limits (TLV-TWA) under NR-15, effluent discharge standards under CONAMA 430/2011, activated sludge and UASB wastewater treatment, coagulation chemistry, ISO 14001 life-cycle perspective, green-chemistry atom economy and the Sheldon E-factor. Maps to the official objetos 'engenharia de meio ambiente', 'projeto e segurança de processos' and 'administração e economia'.

Balanços de massa e energia e Termodinâmica

Steady-state balances with recycle, bypass and purge, single-pass versus overall conversion, selectivity in parallel reactions, evaporation and crystallisation yields, humidity blending; standard enthalpies of formation and heats of combustion, adiabatic flame temperature, cubic equations of state and corresponding states, vapour-liquid equilibrium under modified Raoult's law, fugacity and chemical potential criteria, activity coefficient models (Wilson, NRTL), excess enthalpy, Maxwell relations, the van 't Hoff equation, Gibbs phase rule, Rankine and refrigeration cycle performance and the Joule-Thomson effect. Covers the official objetos 'balanços de massa e energia', 'termodinâmica' and 'química'.

Fenómenos de transporte

Newtonian and power-law rheology, Couette and Poiseuille flow, Reynolds number and friction factors, the Ergun equation for packed beds, pump hydraulic power and NPSH; conduction through composite and cylindrical walls, critical insulation radius, convection correlations and the physical meaning of Nu, Re, Pr and Gr, radiation exchange, LMTD and the effectiveness-NTU method; Fick's laws, equimolar counterdiffusion, Stefan-tube diffusion through a stagnant film, two-film theory and the Chilton-Colburn analogy. Covers the official objeto 'transferência de quantidade de movimento, de calor e de massa'.

Operações unitárias de separação

McCabe-Thiele construction and the q-line, total reflux and Fenske's minimum stages, Underwood minimum reflux, Murphree tray efficiency, azeotropes and relative volatility; absorption HTU and NTU and the minimum liquid-to-gas ratio; liquid-liquid extraction and the plait point; membrane processes including reverse osmosis flux, ultrafiltration and concentration polarisation; drying periods, cake filtration under the Ruth equation, crystallisation supersaturation, leaching, adsorption isotherms, cyclone cut diameter, Stokes settling, psychrometrics, supercritical fluid extraction and multiple-effect evaporator economy. Covers the official objeto 'operações unitárias de transferência de quantidade de movimento, de calor e de massa'.

Cinética, Reatores e Controlo de processos

Arrhenius activation energy, CSTR and PFR design equations and volume comparison, reactors in series, recycle reactors, consecutive reactions and optimum batch time, catalyst effectiveness factor and the Thiele modulus, Langmuir-Hinshelwood kinetics, the pseudo-steady-state hypothesis, Michaelis-Menten saturation and multiple steady states in non-isothermal CSTRs; FOPDT process dynamics, PID actions, Ziegler-Nichols tuning, Routh-Hurwitz gain ranges, gain and phase margins, cascade control and control-valve trim selection. Covers the official objetos 'engenharia das reações químicas', 'engenharia de bioprocessos' and 'modelagem, simulação, otimização e controle de processos'.