A) Aluminum alloys B) Titanium C) Stainless steel D) Copper
A) Cross current flow B) Parallel flow C) Countercurrent flow D) Perpendicular flow
A) Reduce fluid velocity B) Decrease pressure drop C) Increase surface area and create turbulent flow D) Minimize corrosion
A) Brazed type B) Soldered type C) Gasket type to allow periodic disassembly, cleaning, and inspection D) Welded type
A) Might cause clogging as the pathways are very narrow B) Heavy weight C) Low thermal efficiency D) High manufacturing cost
A) Same weight as shell and tube heat exchangers B) Weight varies significantly with size C) Approximately 5 times lighter than shell and tube heat exchanger D) Heavier due to aluminum alloys
A) Industrial boilers B) Hot water heating systems C) Low temperature services such as natural gas, helium and oxygen liquefaction plants D) High pressure steam systems
A) Improvements in welding techniques B) Development of new alloys C) Advances in gasket and brazing technology D) Innovations in fluid dynamics
A) Create a reliable seal that prevents cross-contamination B) Increase heat transfer efficiency C) Enhance fluid flow rate D) Reduce manufacturing costs
A) Very low pressures B) Ultra-high pressures C) High pressures D) Low to medium pressures
A) Higher volume and cost B) Stacked-plate arrangement typically has lower volume and cost C) Lower volume but higher cost D) Same volume but higher cost
A) Welded only B) Dip-brazed, vacuum-brazed, and welded plate varieties C) Bolted and riveted plate varieties D) Soldered and glued plate varieties
A) Low cost B) Resistance to corrosion C) High thermal conductivity D) Aluminum alloys are susceptible to Mercury Liquid Embrittlement Failure
A) To improve aesthetic appearance B) To reduce manufacturing complexity C) To decrease weight D) To enhance heat transfer and create turbulent flow
A) High heat transfer efficiency B) Ease of maintenance C) Large size D) Low cost
A) Shell and tube only B) Plate and frame, plate and shell, and spiral designs C) Spiral only D) Only plate and frame
A) Increases manufacturing complexity B) Ensures fluid flows across the entire heat transfer surface, preventing stagnant zones C) Reduces pressure drop D) Decreases thermal efficiency
A) Perpendicular configuration B) Counter-current configuration C) Cross current configuration D) Parallel configuration
A) Easy to clean B) Requires no maintenance C) Difficult to clean the pathways D) Automated cleaning systems
A) Able to withstand high pressure B) Only suitable for low pressure C) Cannot withstand high pressure D) Pressure handling varies greatly
A) Counter-flow, where fluids enter from opposite ends. B) Parallel-flow, where fluids enter at the same end and travel parallel. C) Cross-flow, where fluids travel perpendicular to each other. D) Direct contact flow.
A) Colorimetric analysis. B) Sound frequency measurement. C) Odor detection. D) Thermodynamic performance testing (SAE J3094, etc.).
A) The John H. Germer method. B) The Charles E. Boardman method. C) The Scott S. Haraburda method. D) The Ramachandra K. Patil (et al.) method.
A) The Charles E. Boardman method. B) The John H. Germer method. C) The Ramachandra K. Patil (et al.) method. D) The Scott S. Haraburda method.
A) Inverted. B) At an angle. C) Horizontally. D) Vertically.
A) Water desalination. B) Oxygen production. C) Pasteurization. D) Air filtration.
A) No welding is involved. B) Circular patterns only. C) A regular pattern of dots or a serpentine pattern of weld lines. D) Randomly placed welds.
A) Applying adhesive between the layers. B) Cooling the metal rapidly after welding. C) Using thicker metal sheets. D) Pressurizing the enclosed space with sufficient force for direct-expansion of the thin metal.
A) A swelled pillow formed out of metal. B) Flat and smooth surfaces. C) Sharp edges and corners. D) Irregular, jagged shapes.
A) Food processing industry B) Automotive industry C) Aerospace industry D) Marine industry
A) Condenser B) Steam generator C) Reboiler D) Evaporator
A) Prandtl instability B) Reynolds instability C) Ledinegg instability D) Bernoulli instability
A) Compressor B) Condenser C) Evaporator D) Expansion valve
A) Fouling prevention B) Heat transfer rate C) Moisture condensation on the air-side D) Expansion upon freezing
A) Humidity B) Condensate C) Frost D) Evaporate
A) Indentations placed within the fins B) Thicker fin material C) Increased fin spacing D) Use of refrigerants
A) Thermal performance B) Pressure drops across the exchanger C) Heat exchange capacity (kW) D) Noise level during operation
A) Kettle HX B) Shell and tube HX C) Double pipe HX D) Plate and frame HX
A) Stainless steel B) Copper C) Titanium D) Polymer
A) Expert opinion alone B) Manual calculations only C) Computer simulations D) Trial and error
A) Changing the fin pitch B) Altering the tube radius C) Using correction factors D) Increasing the number of cores
A) Carbon steel B) Copper C) Aluminium D) Stainless steel
A) The simplicity of the process B) The uniformity of requirements C) The many variables involved D) The lack of computer programs
A) Older, less efficient refrigerants B) Non-refrigerant fluids C) Water-based solutions D) New generation environmentally friendlier refrigerants
A) Gas leak testing B) Hydrostatic pressure testing C) Dye penetration D) Thermal performance logging
A) High fluid velocities B) Low wall shear stress C) Asphaltene insolubility D) Cooling water contamination
A) By wearing a scarf over the face while breathing. B) By inhaling through the mouth instead of the nose. C) By removing clothing to expose skin. D) By exhaling forcefully into the air.
A) Nuclear power B) Waste water treatment C) Petroleum refining D) Refrigeration
A) 2028 B) 2025 C) 2030 D) 2040
A) Mixed-flow B) Counter-flow C) Cross-flow D) Parallel-flow |