ANS:D - Compressors

Among the options provided, compressors produce the maximum pressure difference for the transportation of gases.

Explanation:

1. Compressors:
   • Compressors are devices designed to increase the pressure of a gas by reducing its volume. They are used to create a significant pressure difference between the inlet and outlet.
   • Compressors are capable of generating high pressure differentials, making them suitable for applications where gases need to be transported over long distances or at high pressures.
2. Vacuum Pumps:
   • Vacuum pumps, on the other hand, are used to create a vacuum or low-pressure environment by removing gases from a sealed chamber. They work in the opposite direction to compressors, reducing pressure rather than increasing it.
3. Blowers and Fans:
   • Blowers and fans are also used to move gases, but they typically operate at lower pressure differentials compared to compressors. They are more suited for applications where moderate pressure differences are required, such as ventilation or cooling systems.
4. Maximum Pressure Difference:
   • Compressors are specifically designed to handle higher pressure differences, making them the appropriate choice when significant pressure elevation is needed for gas transportation or processing.

Conclusion:

Therefore, compressors are the correct answer as they produce the maximum pressure difference for the transportation of gases among the options provided. They are essential in industries such as oil and gas, chemical processing, and refrigeration, where high-pressure gas handling is required.