A) Finned tube B) Shell and tube C) Double-pipe D) Plate
A) Aluminum B) Steel C) Copper D) Plastic
A) Bearings B) Fins C) Gaskets D) Valves
A) Control temperature B) Reduce pressure C) Separate hot and cold fluids D) Distribute the fluid evenly to the tubes
A) Increase heat transfer B) Regulate pressure C) Remove air from the system D) Control flow rate through the exchanger
A) Cool the refrigerant B) Regulate the flow of refrigerant into the evaporator C) Remove moisture from the system D) Increase the pressure of the refrigerant
A) Regular cleaning and maintenance B) Higher flow rate C) Less insulation D) Increased pressure
A) Expansion of tube material B) Accumulation of deposits on heat transfer surfaces C) Increase in heat transfer rate D) Decrease in fluid velocity
A) Cross-flow B) Direct-contact C) Counter-flow D) Parallel-flow
A) Net thermal unit (NTU) B) Heat transfer coefficient C) Thermal resistance D) Log mean temperature difference (LMTD)
A) Direct-contact B) Parallel-flow C) Counter-flow D) Cross-flow
A) Double-pipe heat exchanger B) Surface condenser C) Plate heat exchanger D) Evaporator
A) Low-pressure applications with temperatures below 260 °C. B) High-pressure applications greater than 30 bar. C) Processes involving fluids at temperatures greater than 260 °C. D) Applications requiring robust construction due to high pressure.
A) Maximizing the flow-induced vibration. B) Reducing the availability of spare parts. C) Minimizing the axial strength. D) Ensuring enough room for corrosion resistance.
A) About 5% annually. B) 10% annually. C) 1% annually. D) 15% annually.
A) Using flexible rubber sheets B) Through external attachment C) As flat plates that are stacked inside a tank D) By embedding them in concrete
A) Scott S. Haraburda method B) Laminar flow method C) Boardman-Germer method D) Ramachandra K. Patil (et al.) method
A) They eliminate the need for baffles. B) They reduce the overall size of the heat exchanger. C) They allow for thermal expansion without stressing the tubesheets. D) They increase the likelihood of fouling.
A) No patterns at all B) Circular patterns C) Square grids D) Chevron, dimpled, or other patterns
A) Between 1mm and 3mm B) Equal to 10mm C) Smaller than 1mm D) Larger than 5mm
A) Shell and tube B) Plate-and-frame C) Welded plate variety D) Circular plate pack
A) Cooling milk in large direct-expansion stainless steel bulk tanks B) Storing cheese C) Heating milk before pasteurization D) Fermenting yogurt
A) Solid-liquid or solid – gas B) Immiscible liquid – liquid C) Gas – liquid D) Microchannel
A) Holds the gaskets B) Is used for cleaning purposes C) Creates a second flowpath called the 'Shell side' D) Contains only the Plate side flowpath
A) Organic Rankine cycle (ORC). B) Phase-change heat exchanger. C) Steam Rankine cycle (SRC). D) Dynamic scraped surface heat exchanger.
A) Pentafluoropropane (R-245fa). B) Toluene. C) Water. D) Ammonia.
A) Turbulent flow method B) Ramachandra K. Patil (et al.) method C) Scott S. Haraburda method D) Boardman-Germer method
A) Oil refineries B) Air separation plants C) Nuclear power plants D) Chemical manufacturing
A) Construction industry B) Textile industry C) Automotive industry D) Dairy industry
A) Titanium B) Aluminum alloys C) Copper D) Stainless steel
A) Shape. B) Size. C) Color. D) Cost.
A) Material strength vs corrosion resistance. B) Thermal efficiency vs size. C) Pressure drop vs fluid velocity. D) Capital cost vs operating cost.
A) It bulges out around the welds when pressurized B) It contracts and forms a flat surface C) It is removed to create channels D) It becomes thinner and more flexible
A) Less compact B) Lower airside pressure drops C) Larger size D) Higher refrigerant charges
A) The furnace will produce less heat. B) Airflow will increase significantly. C) Combustion products may enter living space. D) The system will become more energy-efficient.
A) High pressure drops B) Freeze protection C) Microchannel design D) Low refrigerant charges
A) Rotated triangular (60°) pattern. B) Triangular (30°) pattern. C) Rotated square (45°) pattern. D) Square (90°) pattern. |