A) Shell and tube B) Plate C) Finned tube D) Double-pipe
A) Copper B) Aluminum C) Steel D) Plastic
A) Fins B) Bearings C) Gaskets D) Valves
A) Reduce pressure B) Separate hot and cold fluids C) Distribute the fluid evenly to the tubes D) Control temperature
A) Regulate pressure B) Remove air from the system C) Control flow rate through the exchanger D) Increase heat transfer
A) Increase the pressure of the refrigerant B) Regulate the flow of refrigerant into the evaporator C) Remove moisture from the system D) Cool the refrigerant
A) Increased pressure B) Less insulation C) Higher flow rate D) Regular cleaning and maintenance
A) Expansion of tube material B) Accumulation of deposits on heat transfer surfaces C) Decrease in fluid velocity D) Increase in heat transfer rate
A) Counter-flow B) Direct-contact C) Parallel-flow D) Cross-flow
A) Log mean temperature difference (LMTD) B) Net thermal unit (NTU) C) Heat transfer coefficient D) Thermal resistance
A) Parallel-flow B) Counter-flow C) Cross-flow D) Direct-contact
A) Plate heat exchanger B) Evaporator C) Double-pipe heat exchanger D) Surface condenser
A) Applications requiring robust construction due to high pressure. B) High-pressure applications greater than 30 bar. C) Processes involving fluids at temperatures greater than 260 °C. D) Low-pressure applications with temperatures below 260 °C.
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) 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) Ramachandra K. Patil (et al.) method C) Boardman-Germer method D) Laminar flow 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) Chevron, dimpled, or other patterns B) Square grids C) Circular patterns D) No patterns at all
A) Larger than 5mm B) Between 1mm and 3mm C) Equal to 10mm D) Smaller than 1mm
A) Welded plate variety B) Plate-and-frame C) Circular plate pack D) Shell and tube
A) Heating milk before pasteurization B) Cooling milk in large direct-expansion stainless steel bulk tanks C) Fermenting yogurt D) Storing cheese
A) Gas – liquid B) Solid-liquid or solid – gas C) Immiscible liquid – liquid D) Microchannel
A) Creates a second flowpath called the 'Shell side' B) Contains only the Plate side flowpath C) Holds the gaskets D) Is used for cleaning purposes
A) Phase-change heat exchanger. B) Organic Rankine cycle (ORC). C) Steam Rankine cycle (SRC). D) Dynamic scraped surface heat exchanger.
A) Water. B) Ammonia. C) Toluene. D) Pentafluoropropane (R-245fa).
A) Turbulent flow method B) Scott S. Haraburda method C) Ramachandra K. Patil (et al.) method D) Boardman-Germer method
A) Chemical manufacturing B) Oil refineries C) Air separation plants D) Nuclear power plants
A) Dairy industry B) Automotive industry C) Construction industry D) Textile industry
A) Aluminum alloys B) Stainless steel C) Titanium D) Copper
A) Color. B) Cost. C) Shape. D) Size.
A) Capital cost vs operating cost. B) Material strength vs corrosion resistance. C) Pressure drop vs fluid velocity. D) Thermal efficiency vs size.
A) It becomes thinner and more flexible B) It contracts and forms a flat surface C) It bulges out around the welds when pressurized D) It is removed to create channels
A) Higher refrigerant charges B) Less compact C) Larger size D) Lower airside pressure drops
A) The furnace will produce less heat. B) The system will become more energy-efficient. C) Airflow will increase significantly. D) Combustion products may enter living space.
A) High pressure drops B) Low refrigerant charges C) Freeze protection D) Microchannel design
A) Square (90°) pattern. B) Rotated triangular (60°) pattern. C) Rotated square (45°) pattern. D) Triangular (30°) pattern. |