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