Which of the following values represents a common design cycle suction pressure?

The value that represents a common design cycle suction pressure is typically in the range of 5 psi. In refrigeration and air conditioning systems, suction pressure refers to the pressure at the evaporator coil where the refrigerant absorbs heat. This low pressure allows the refrigerant to evaporate and effectively cool down the air or medium it is intended to serve.

While other values could be associated with specific scenarios or different types of systems, 5 psi is a common reference point for many standard systems, especially in lower capacity setups. Variations in suction pressure can occur based on equipment specifications, environmental conditions, and intended application, but 5 psi stands out as a baseline often noted in design documentation.

The other values, such as 15, 20, and 30 psi, may pertain to different stages or types of operation but do not reflect the typical design cycle suction pressure commonly referenced in standard cooling applications.