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