Which of the following is NOT an indicator of a hot spot on a roof?

The correct answer is that smoke coming from the scuttle cover is not an indicator of a hot spot on a roof. In building construction and firefighting, hot spots are typically identified by physical changes on the surface of the roof that suggest heat buildup, which can indicate the presence of fire or intense heat below.

Dry spots on a wet or snowy roof suggest that certain areas are absorbing heat, which can indicate a hot spot, as the insulation or roof materials are not as effective in dampening the heat in these areas. Melting tar is another clear indication, as it signifies that the temperature in that area is sufficiently high to cause the tar to melt, which would not occur unless there is extraordinarily high heat nearby. Similarly, wet spots in areas without snow may suggest that heat from below is causing melting or moisture issues, indicating the presence of a hot spot.

In contrast, smoke coming from the scuttle cover generally indicates that there is a fire within the building and the smoke is venting upwards, rather than suggesting a localized area of heat or a hot spot specifically on the roof. While smoke can imply danger, it doesn’t give a specific indication of thermal activity on the roofing material itself. Thus, this choice stands apart as not fitting the criteria