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