During a fire, which statement regarding the performance of ENT is correct?

When considering the performance of Electrical Nonmetallic Tubing (ENT) during a fire, the statement that ENT maintains integrity under heat is correct. ENT is designed to withstand certain levels of heat and does not melt immediately when exposed to flame, providing time for evacuation and fire suppression actions. While it is not completely immune to damage from high temperatures, it does maintain its structure better than many other types of materials under similar conditions.

Additionally, stating that ENT offers no protection is not accurate; it provides a degree of protection against accidental contact and impacts, even in adverse conditions. Therefore, the assertion that ENT maintains integrity under heat acknowledges its fire resistance capabilities, which supports the understanding of its overall performance during a fire.

The inclusion of "All of the above" as a choice would suggest that all statements hold true, but since the other statements are misleading regarding the characteristics of ENT, this reinforces that a detailed understanding of material properties is crucial when assessing performance in fire situations.