Wildland Firefighting Exam Questions and Answers 100% Correct(RATED A+)

The range of ignition temperatures of wood is between ____and ____degrees Fahrenheit - ANSWER-400 & 700 Normally the woody fuel of the wildland will burst into flame at approx. ____ degrees ( assuming sufficient 02 is present) - ANSWER-540 The highest temperature that the sun could be expected to develop on a wind sheltered surface is ____ or ____ degrees - ANSWER-150, 160 Fire will burn as fiercely in darkness as it did in the daytime as a result of ____ - ANSWER-wind Define Temperature Inversion - ANSWER-In an inversion, cooler air is found nearer the surface, with a warming trend at a higher altitude Fires burning in the cooler environment of an ____ can be expected to subside, become dormant and sluggish, as higher relative humidity and higher fuel moistures become available - ANSWER-inversion The most prominent danger period involving an inversion will occur at ____ - ANSWER-at the point when sluggish lower elevation fire suddenly burns through the lid into the warmer air above Vertical air currents do not automatically develop in unstable air; some external force or lifting action such as convection caused by surface heating or lifting over mountains ( ____ lifting) must supply the initial motion - ANSWER-orographic Decreasing temperature and increasing humidity of evening will cause a fire burning in a wooded canyon to " ____" through the night - ANSWER-lay down Fresh air is sucked toward the fire from a lower elevation or down along the canyon sides and the sleeping fire bursts into new life with explosive speed and energy. This erratic fire behavior may form a " ____" condition - ANSWER-Blow up _____,which is simply water in a gaseous state,is a most important ingredient in weather - ANSWER-Water vapor (relative humidity) The ____ is that temperature, at any given altitude, at which the air becomes completely saturated. - ANSWER-dew point The term ____ indicates the ratio of the amount of water vapor actually present to the maximum amount that the air potentially could hold. - ANSWER-relative humidity If relative humidity is ____ percent, the air is said to be completely saturated - ANSWER-100% When the relative humidity descends below about ____, the situation is becoming favorable for wildland fire. - ANSWER-30% When humidity is 40% or more how is grass affected and how will it burn. - ANSWER-Grass is affected quite readily and may not burn at all for an hour or so after the humidity changes. If fuel and topographic conditions do not alter the result, it can be said that a strong wind in one