Which outcome occurs when a refrigeration system's defrost cycle overheats?

💡 Explanation

Excessive heat during defrost causes the evaporator coil to expand and contract rapidly—a process called thermal stress. Because this repeated expansion/contraction exceeds material limits, cracking is probable; therefore, the coil fails, rather than refrigerant phase change altering significantly.

• Which risk increases in a fuel injection system when fuel temperature exceeds its Reid Vapor Pressure (RVP) specification?
• Which lift reduction occurs as rotorcraft blade-tip speed approaches the ambient speed of sound?
• Which issue arises on a CNC lathe when exceeding critical material feed pressure?
• Which outcome occurs when liquefied petroleum gas (LPG) leaks inside a storage tank?
• Which risk increases significantly when three-phase power transformers experience differential protection blindspots?
• Which consequence results when drain voltage rapidly decreases on a switched MOSFET?