Weekly Quiz #8

__________ is the organic debris left on the ground after logging or windstorms.

Brush

Switch

Slag

Slash

Slash

A flood frequency graph, like the one shown below, can be used to predict the size (or the discharge) of a flood or the recurrence interval.

What is the discharge of a flood with a recurrence interval of 50 years?

about 2300 m³/s

about 3000 m³/s

about 2000 m³/s

about 2500 m³/s

about 2300 m³/s

The discharge of a stream is calculated by multiplying a stream's __________.

slope (S) by the force of gravity (g)

sinuosity (S) by the cross-sectional area (A)

bed load (B) by its velocity (V)

cross-sectional area (A) by the force of gravity (g)

cross-sectional area (A) by its velocity (V)

cross-sectional area (A) by its velocity (V)

True or False: Firefighters set backfires to reduce or eliminate the fuel for an advancing wildfire.

True

Wildfires that race through the treetops are known as __________.

slash fires

bough fires

crown fires

hypothermal fires

crown fires

For any given stream, small floods happen __________.

more often than large floods

less often than large floods

as often as large floods

more often than large floods

True or False: Fire is the rapid combination of oxygen, hydrogen, and other elements of organic material in a reaction that produces flame, heat, and light.

True

Which of the following would be partly to blame for deaths or the destruction of houses?

Storing firewood next to your home.

Locating your house on a slope.

Having a roof made of flammable roof shingles.

All of these choices are correct.

Allowing tree limbs to hang over the roof

All of these choices are correct.

If a fire in one area starts a fire in another area 10 kilometers away, the most likely cause is (a) __________.

firebrand

radiation

conduction

reduction

diffusion

firebrand

What are the three components of the fire triangle?

Heat, Oxygen, and Fuel

Convection, Fuel, and Heat

Fire, Oxygen, and Wind

Radiation, Conduction, and Convection

Fuel, Oxygen, and Combustion

Heat, Oxygen, and Fuel

Fire burns faster __________.

Correct answer:

up slope

is not dependent on the direction of slope

down slope

on flat ground

up slope

True or False: A 100-year flood ONLY happens every 100 years.

False

True or False: If you look at a cross-section of a stream, it will show a lower gradient near the headwaters and a higher gradient near the stream mouth.

True

Which letter best describes the shape of a stream located at the headwaters?

W

C

X

U

V

V