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