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