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