A hot gas defrost cycle can be initiated by which of the following methods?

A hot gas defrost cycle can indeed be initiated by using a timer. This method involves setting a predetermined time interval at which the defrost cycle will begin, regardless of the conditions within the refrigeration system. The timer regulates the frequency of defrost cycles, ensuring that frost or ice buildup is managed effectively and that the system operates efficiently.

Using a timer is particularly useful in environments where frost buildup occurs at predictable intervals, such as in commercial refrigeration applications. This approach allows the operator to maintain consistent operation without the need for continuous monitoring of other environmental factors.

Other methods can initiate the defrost cycle based on specific conditions, such as temperature or pressure changes. However, the timer operates independently of those variables, making it a straightforward solution for managing the defrost process in a more automated fashion.