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