Physical Hazards Flashcards
What is NIOSH maximum weight limit?
never more than 51 lbs.
Lifting Index Formula?
lifting index (LI) = load weight/recommended weight limit
NIHL is most apparent at ___ Hz?
4000
What is action level for noise per OSHA?
85 dBA
What is PEL of noise per OSHA?
90 dBA
What entity inspects nuclear sites?
NRC
What is the first sens to be affected by hypoxia?
vision
Per NRC, what is occupational exposure limit for radiation?
5 rem (.05 Sv)
Alpha particle shielding material?
paper, skin, light fabric
Beta particle shielding material?
heavy clothing protects but may penetrate germinal layers of skin
Gamma rays and x-rays shielding material?
lead shielding
1 Sievert (Sv) is = ___rem
100 rem
Symptoms of heat syncope:
dizziness, syncope, vasodilation, quick recovery expected
Symptoms of heat cramps:
cramping, hyponatremia, normal body temp, usually later in the day or post-work, absence of constitutional symptoms
Symptoms of heat exhaustion:
salt and water depletion, NV, weakness, mental status change, “clammy and pale”
Symptoms of heat stroke:
failure to dissipate body heat, reduced LOC or psychosis, circulatory collapse, rhabdo, ARF, “hot and dry”
What does WGBT measure?
Air temp, humidity, radiant heat,air flow
Hyperbaric environment: how many atmospheres of pressure per 33 feet of depth?
1 atm per 33 feet of depth
Hypobaric environment: how many atmospheres of pressure at 18,000 ASL?
0.5 atm
What are illnesses associated with hypobaric environments?
hypoxia, AMS, HAPE, HACE
Prevention and treatment of AMS?
slow ascent, acetazolamide; treated with descent, dexamethasone, O2
Altitude hypoxia: what sense is first affected?
vision-diminished night vision
