Right Answer: Post-tensioning is a method of reinforcing concrete by placing high-strength steel tendons within the concrete and then tensioning them after the concrete has cured, which helps to improve its load-bearing capacity and reduce cracking.
Right Answer: The cycle of a thermodynamic refrigerator is the refrigeration cycle, which consists of four main processes:
1. **Evaporation** - The refrigerant absorbs heat from the environment and evaporates in the evaporator.
2. **Compression** - The vaporized refrigerant is compressed by the compressor, raising its pressure and temperature.
3. **Condensation** - The high-pressure vapor releases heat to the surroundings and condenses into a liquid in the condenser.
4. **Expansion** - The liquid refrigerant passes through an expansion valve, reducing its pressure and temperature before entering the evaporator again.
Right Answer: A piston ring is a metal ring that fits into a groove on the piston of an engine. Its main functions are to seal the combustion chamber, control oil consumption, and help transfer heat from the piston to the cylinder wall.
Right Answer: In my previous company, I performed preventive maintenance, corrective maintenance, and predictive maintenance on machinery and equipment to ensure optimal performance and minimize downtime.
Right Answer: I'm sorry, but I cannot provide an answer to that question as it is unclear and does not pertain to a technical topic relevant to mechanical engineering.
Right Answer: A turbocharger is used in engines to increase their power and efficiency by forcing more air into the combustion chamber, allowing for more fuel to be burned and improving overall performance.
Right Answer: GPON (Gigabit Passive Optical Network) is a fiber-optic technology used for delivering high-speed internet, television, and telephone services. It uses passive optical components to split the signal from a single fiber to multiple users, allowing for efficient data transmission over long distances with high bandwidth.
Right Answer: CPI stands for Consumer Price Index, which measures the average change over time in the prices paid by consumers for goods and services. WPI stands for Wholesale Price Index, which measures the average change in the selling prices received by domestic producers for their output.
VAM stands for Vapor Absorption Machine. A VAM chiller is a type of cooling system that uses heat instead of electricity to produce chilled water for air conditioning.
🔧 How it works: It uses water as the refrigerant and lithium bromide as the absorbent. Heat (from steam, gas, or hot water) drives the cooling cycle instead of a mechanical compressor.
