Western Canada Mine Rescue Manual Chapter 3: Environmental Conditions Quiz
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Questions and Answers

Mine rescue teams should be aware of the special dangers associated with ______ conditions.

environmental

Mines operating in avalanche-prone areas must develop an avalanche emergency response plan tailored to their ______.

mine

Mine rescue personnel may be required to perform emergency response activities that expose them to ______ hazards.

avalanche

A qualified avalanche safety officer must be identified, consulted, and lead the safe emergency response in an active avalanche ______.

<p>situation</p> Signup and view all the answers

The avalanche safety officer must conduct an avalanche risk assessment and establish active avalanche safety measures prior to planning emergency ______.

<p>operations</p> Signup and view all the answers

An avalanche is a rapid flow of snow down a sloping surface that can occur at any time provided the right ______ are present.

<p>conditions</p> Signup and view all the answers

Avalanches have three main ______:

<p>parts</p> Signup and view all the answers

Starting zone (point of origin): Where the unstable snow first breaks ______.

<p>away</p> Signup and view all the answers

Characteristics of starting zones include: incline, slope ______, exposure to wind, elevation, exposure to sun, natural ground condition.

<p>aspect</p> Signup and view all the answers

Avalanche terms, concepts, and ______

<p>equipment</p> Signup and view all the answers

This chapter will provide a basic understanding of ______ travel.

<p>ice</p> Signup and view all the answers

The ______ stress

<p>thermal</p> Signup and view all the answers

Avalanches rarely start on slopes steeper than ______° as snow sloughs off continuously rather than accumulating.

<p>45</p> Signup and view all the answers

Slab avalanches occur when a slab of fairly cohesive layers of snow, poorly bonded to the snow underneath, breaks off along a fracture line. These avalanches are by far the most ______.

<p>dangerous</p> Signup and view all the answers

Teams performing rescue operations in an avalanche area must be mentally prepared for the possibility that they too may be overtaken by an avalanche. If crossing an avalanche track cannot be avoided, take the following ______:

<p>precautions</p> Signup and view all the answers

Select the shortest possible route high on the slope or low in the run-out zone. Plan an escape ______.

<p>route</p> Signup and view all the answers

The successful rescue of a person buried in an avalanche very often depends upon actions taken by unburied ______.

<p>survivors</p> Signup and view all the answers

The thickness of the ice must be tested frequently in various ______.

<p>locations</p> Signup and view all the answers

Clear blue river-ice, with moving water beneath it, is not as strong as lake-ice. Loads should be reduced by at least ______%.

<p>15</p> Signup and view all the answers

The resonance wave can affect the strength of the ice, potentially resulting in a blowout, or an ice ______.

<p>failure</p> Signup and view all the answers

The speed limit on ice roads is 25 km/h for a loaded vehicle and 35 km/h for an empty ______.

<p>vehicle</p> Signup and view all the answers

Gold’s Formula for determining the maximum allowable ______ is: $M = 4 imes h^2$ where M is the ______ of the vehicle (kg) and h is the thickness of the ice (cm).

<p>mass</p> Signup and view all the answers

Clear blue lake-ice is considered the strongest form of ______.

<p>ice</p> Signup and view all the answers

Thermal stress refers to a range of physiological reactions to adverse ______ conditions.

<p>temperature</p> Signup and view all the answers

Hypothermia is a condition of lowered internal body-core temperature, also known as ________ sickness.

<p>exposure</p> Signup and view all the answers

Hypothermia results from chilling by cold, wind, or water such that the body loses heat faster than it can produce it. Factors contributing to the development of hypothermia include inadequate ________.

<p>clothing</p> Signup and view all the answers

Hypothermia and water immersion can lead to exhaustion, dehydration, and lack of ________.

<p>nutrition</p> Signup and view all the answers

Stage 1 of mild hypothermia occurs at a core temperature of ________ degrees Celsius.

<p>37.2–36.1</p> Signup and view all the answers

Stage 2 of moderate hypothermia occurs at a core temperature of ________ degrees Celsius.

<p>35.0–33.9</p> Signup and view all the answers

Stage 3 of severe hypothermia occurs at a core temperature of ________ degrees Celsius.

<p>32.2–30.0</p> Signup and view all the answers

If water temperature is 0 degrees Celsius, the expected survival time in the state of exhaustion or unconsciousness is ________ minutes.

<p>&lt; 15</p> Signup and view all the answers

If water temperature is 25–30 degrees Celsius, the expected survival time in the state of exhaustion or unconsciousness is ________ hours.

<p>3 hours–indefinitely</p> Signup and view all the answers

Shivering, intense, and lack of muscle coordination becomes apparent in the stage of moderate hypothermia, with a core temperature of 35.0–33.9 degrees Celsius. Use sobriety test: if unable to walk a 30-foot straight line, the person is ________.

<p>hypothermic</p> Signup and view all the answers

Shivering stops and exposed skin turns blue or puffy in the stage of severe hypothermia, with a core temperature of 32.2–30.0 degrees Celsius. Muscle coordination becomes very poor and there is an inability to ________.

<p>walk</p> Signup and view all the answers

Unconsciousness, erratic heart beat, and respiratory failure are signs of severe hypothermia, with a core temperature of 27.8–25.6 degrees Celsius. Death may occur before this temperature is reached due to pulmonary ________.

<p>oedema</p> Signup and view all the answers

The technique for cold water survival that protects the parts of the body that lose heat fastest is known as H.E.L.P. (Heat Escape Lessening Position). It increases predicted survival time by up to ________%.

<p>50</p> Signup and view all the answers

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