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Durnzans
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What kills the majority of people caught in a fire?
Aphyxiation
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Class B fire is _____
Flammable liquid and gasses
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Class C fire is _____
Electrical
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Class A fire is _____
Solid materials (wood, paper, plastic, etc)
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Explain why water cannot be used to fight fire on a substance that is lighter than water.
Water floats the burning fuel and spreads it.
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Most common fire extinguishant because low cost and effective.
Water
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Suppress fires by cooling, blanketing, and sealing off the burning fuel from the atmosphere.
Foams
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Most common gas extinguishant is ____
Carbon dioxide
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(T/F) All portable fire extinguishers are filled with the same firefighting material.
False
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Three ways boilers are protected from over pressurization are by:
Pressure release valves, Fusible plugs, and Low water shutoff devices.
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The weakest point on a compressed air or nitrogen cylinder is the:
Cylinder valve
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A ______ is a deliberate weak area of a building wall that releases pressure through that panel rather than allow a whole building to explode.
Blowout panel
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___________ is caused by a sudden stoppage of liquid flow that creates a lot of pressure.
Water hammer
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(T/F) Draining an unvented storage tank may collapse the tank.
True
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A gallon of water converted to steam would occupy ______ times the space.
1,600
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Explain why steam is commonly used as an inert gas for purging vessels and lines.
Not combustible and does not support combustion
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(T/F) Steam is combustible.
false
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(T/F) A stream of high pressure gas can cut like a knife blade.
true
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_______ means connecting two objects together with metal.
Bonding
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_____ consists of connecting an object to the earth with a metal rod driven into the earth.
Grounding
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The unit of measurement for the level of sound is the _____
Decibel
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The maximum level of sound that a human can tolerate without experiencing pain is:
140 dBA
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The maximum decibel level considered for continuous exposure over eight-hourdays without protection is:
90 dBA
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(Choose three) Exposure to excessive noise can lead to:
Increased blood pressure, Constriction of heart vessels, and heart disease
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List three types of hearing protection devices.
plugs, foam plugs, muffs, and active hearing devices
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Hearing protection training is required every _______ years.
1
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Two effects of vibration on personnel are:
Arthritis and bursitis
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As sweat (water) evaporates it carries away ______ , which removes large amounts of heat.
latent heat
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The body must replace _____ and _____ to prevent heat stress or sickness.
water, electrolytes
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Three symptoms of heat stroke are:
(1) hot, dry, mottled skin, (2) confusion and/or convulsions, and(3) loss of consciousness.
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(T/F) Heat stroke can be fatal.
true
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(T/F) Heat exhaustion is caused by prolonged exertion in a hot environment and a failure to replace water and/or electrolytes.
true
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Three important functions of the skin are ______, ________ , and ______ .
- • Protection of body tissue
- • Sensation
- • Secretion
- • Excretion
- • Respiration
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Explain why burns can be very dangerous,
they disrupt the normal functioning of the skin
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Chemical burns are like thermal burns because they _____.
destroy body tissues
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Describe first aid for a chemical burn.
Wash off the chemical by flooding the areas with water
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(T/F) Over a 20-30 year career, a process technician may collect thousands of samples.
false, they will collect hundreds of thousands
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Three reasons technicians must use a gas detector on their process unit are:
- a. Check for combustible levels of hydrocarbons
- b. Check for oxygen levels
- c. Detect the presence of toxic levels of gases
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Repeated exposure to minute quantities of hazardous chemicals that cause no acute health effects but may cause chronic health effects is called______.
Micro-insult
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A ______ is left in a sample container as a safeguard against thermal expansion of the container.
Vapor space
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An ______ is the lowest percentage of a substance in air which will burn or explode when ignited.
Lower explosion limit
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Two atmospheres LEL meters should not be used in are:
Highly humid and Oxygen deficit.
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