A) Plate B) Shell and tube C) Finned tube D) Double-pipe
A) Copper B) Steel C) Plastic D) Aluminum
A) Valves B) Fins C) Gaskets D) Bearings
A) Control temperature B) Separate hot and cold fluids C) Distribute the fluid evenly to the tubes D) Reduce pressure
A) Remove air from the system B) Regulate pressure C) Increase heat transfer D) Control flow rate through the exchanger
A) Remove moisture from the system B) Increase the pressure of the refrigerant C) Regulate the flow of refrigerant into the evaporator 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) Increase in heat transfer rate C) Accumulation of deposits on heat transfer surfaces D) Decrease in fluid velocity
A) Parallel-flow B) Counter-flow C) Cross-flow D) Direct-contact
A) Log mean temperature difference (LMTD) B) Net thermal unit (NTU) C) Heat transfer coefficient D) Thermal resistance
A) Direct-contact B) Parallel-flow C) Counter-flow D) Cross-flow
A) Surface condenser B) Double-pipe heat exchanger C) Evaporator D) Plate heat exchanger
A) Processes involving fluids at temperatures greater than 260 °C. B) Applications requiring robust construction due to high pressure. C) High-pressure applications greater than 30 bar. D) Low-pressure applications with temperatures below 260 °C.
A) Maximizing the flow-induced vibration. B) Reducing the availability of spare parts. C) Ensuring enough room for corrosion resistance. D) Minimizing the axial strength.
A) 10% annually. B) 1% annually. C) About 5% annually. D) 15% annually.
A) By embedding them in concrete B) As flat plates that are stacked inside a tank C) Through external attachment D) Using flexible rubber sheets
A) Ramachandra K. Patil (et al.) method B) Boardman-Germer method C) Laminar flow method D) Scott S. Haraburda method
A) They allow for thermal expansion without stressing the tubesheets. B) They reduce the overall size of the heat exchanger. C) They increase the likelihood of fouling. D) They eliminate the need for baffles.
A) No patterns at all B) Square grids C) Circular patterns D) Chevron, dimpled, or other patterns
A) Smaller than 1mm B) Larger than 5mm C) Between 1mm and 3mm D) Equal to 10mm
A) Circular plate pack B) Shell and tube C) Welded plate variety D) Plate-and-frame
A) Heating milk before pasteurization B) Fermenting yogurt 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) Holds the gaskets B) Contains only the Plate side flowpath C) Creates a second flowpath called the 'Shell side' D) Is used for cleaning purposes
A) Phase-change heat exchanger. B) Steam Rankine cycle (SRC). C) Organic Rankine cycle (ORC). D) Dynamic scraped surface heat exchanger.
A) Toluene. B) Ammonia. C) Pentafluoropropane (R-245fa). D) Water.
A) Scott S. Haraburda method B) Ramachandra K. Patil (et al.) method C) Turbulent flow method D) Boardman-Germer method
A) Oil refineries B) Nuclear power plants C) Air separation plants D) Chemical manufacturing
A) Dairy industry B) Textile industry C) Construction industry D) Automotive industry
A) Aluminum alloys B) Titanium C) Stainless steel D) Copper
A) Cost. B) Shape. C) Color. D) Size.
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 bulges out around the welds when pressurized B) It becomes thinner and more flexible C) It is removed to create channels D) It contracts and forms a flat surface
A) Larger size B) Less compact C) Lower airside pressure drops D) Higher refrigerant charges
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) Freeze protection C) High pressure drops D) Low refrigerant charges
A) Rotated triangular (60°) pattern. B) Triangular (30°) pattern. C) Rotated square (45°) pattern. D) Square (90°) pattern. |