What can occur due to the lack of specific equipment in intermittently used setups?

The correct choice highlights that a lack of specific equipment in setups that are used intermittently can result in violent fluctuations in pressure. This situation arises because intermittent use often leads to inconsistent conditions, causing pressure to build up or drop unexpectedly. Equipment that is not adequately designed or calibrated for the operating conditions may fail to maintain stable pressure levels when the system is started or stopped, thereby creating significant fluctuations. These violent changes can be damaging to the system, potentially leading to equipment failure or safety hazards.

In contrast, options like consistent pressure levels and low energy consumption are not valid in this context because intermittent setups lacking the right equipment typically struggle to maintain stability and efficiency. Similarly, uneven temperature distribution could be a consequence of inadequate equipment, but it does not directly address pressure issues as specifically as the chosen answer does.