Which of the following terms describes an instability that occurs when heat generation exceeds heat loss within the material?

1. When a thermally thick solid is exposed to heat, we expect a(n):

slight rise in temperature incurred to both sides of the fuel surface due to the fast transfer and dissipation of the imposed heat flux on one side and transferred to the other.
substantial increase in temperature on the side facing the imposed heat flux, and the opposite side will incur a slower increase in temperature.
substantial increase in temperature on the opposite side, and the side facing the imposed heat flux will incur a slow increase in temperature.
immediate decrease in temperature incurred to both sides of the fuel surface due to the fast transfer and dissipation of the imposed heat flux on one side and transferred to the other.

Question 2

1. A shift from counterflow to concurrent flame spread will occur when the angle of incline increases past:

25
35
45
75

Question 3

1. What is spontaneous ignition?

The minimum temperature required for ignition of fuel gases under specific test conditions.
The temperature required to produce the lower flammable limit.
The temperature at which oxidation reactions will initiate within fuel/air mixtures without an outside pilot source.
A self-heating process with a significant increase in the rate of temperature rise, which continues to ignition.

Question 4

1. Radiant heat is emitted in what direction from the source?

90
180
270
360

Question 5

1. When the exposed fuel item only receives a portion of the radiant heat transfer from the burning item, this along with the distance between the objects is known as what?

The configuration/view factor
A heat shadow
A protected area
The exposure/line of sight factor

Question 6

1. Which of the following terms describes an instability that occurs when heat generation exceeds heat loss within the material?

Thermal runaway
Thermal resistance
Thermally unbalanced
Thermal Inertia

Question 7

1. Which of the following is the primary mode of heat transfer during combustion?

Conduction
Convection
Radiation
Heat flux

Question 8

1. Which of the following is NOT included in the convection heat transfer coefficient?

Fluid properties
Surface geometry
Nature of the fluid motion
Convective heat release

Question 9

1. Which of the following was NOT among the most common reported ignition sources cited in Chapter 11?

Cooking equipment
Heating equipment
Hair care devices
Electrical