Heat
The fire triangle consists of three elements. They are:
oxygen, fuel, and heat.
Trees, branches, foliage, and tall brush fall into the __________ category
A. ground fuels B. high hazard C. surface fuels D. aerial fuels
aerial fuels
__________ occurs when a moving, cooler air mass pushes its way under a warmer air mass and forces the air up a slope
A. Orographic B. Thermal C. Frontal lifting D. Convergence
Frontal lifting
When fuel moisture is __________, a fire will burn poorly.
A) without oxygen B) Low C)High D) Decreasing
High
__________ is the process by which heat is imparted from one body to another
a)Heat flux b) Radiation c) rate of speed d)heat transfer
Heat transfer
Certain terrain features cause fires to spread at a greater rate; __________ are examples of these features.
A. chimneys, saddles, and narrow canyons
B. aspect, slope, and elevation
C. vegetation model, shrubs, and timber
D. elevation, direction, and steepness
chimneys, saddles, and narrow canyons
Two characteristics make thunderstorms a great concern to fire fighters on fire lines:
A. wind and lightning. B. wind and increased temperatures.
wind and lightning.
The direction of the slope’s face in relation to the cardinal compass points is called its:
A. east. B. division. C. direction. D. aspect.
aspect.
__________ is the transfer of heat in a straight line through emission of energy
Radiation
. __________ are combustible materials lying on or near the surface of the ground and a major cause of wildland fire spread.
Surface fuels
Wind is defined as the __________ from which the wind is coming.
direction
A red flag warning usually includes
A. lightning for a short period of time.
B. high fuel moisture.
C. strong winds.
D. wet thunderstorm
strong winds.
__________ is the transfer of heat by the movement of a gas or liquid.
a) Convection b) radiation c) conduction d) heat flex
Convection
__________ refers to the degree of continuous distribution of fuel particles in a fuel bed.
A)Fuel continuity B)Horizontal continuity
Fuel continuity
Upslope winds occur during the day as a result of the __________ of the land surfaces
a) cooling b) heating c) equalizing d) alignment
heating
When relative humidity is __________, fire behavior increases because fine fuels dry out, making them more susceptible to ignition
A. absent B. rising C. low D. high
Low
The speed at which a fire moves away from the site of origin is called the:
rate of spread.
Grasses are the __________ carrier of wildland fires.
A. primary B. secondary C. least D. unlikely
primary
Downslope winds occur at night and are __________, superficial winds that blow downslope.
a) safe b) dangerous c) strong d) weak
weak
The first slopes to be heated by the sun’s energy are those facing
a) north b) south. c) east. d) west.
East