PREP STUDY GUIDE COMPLETE Q&A
VERIFIED AND ACCURATE
⩥ Presbyopia. Answer: impaired vision as a result of aging, difficulty
focusing
⩥ Byssinosis. Answer: Disease from inhaling cotton fibers. Also called
"brown lung disease" or "Monday fever". Reaction against cotton, linen,
hemp products in textile/fabric industry.
⩥ Four (4) types of human errors discussed in Human Factors
Engineering.. Answer: "Errors C.O.S.T. time and money"
1. Commission: doing something wrong
2. Omission: leaving something out
3. Sequence: doing something in the wrong order
4. Timing: doing something out of allotted time, too fast or too slow
⩥ Does the employers have to post OSHA citations?. Answer: Yes, for 3
days or until corrected.
⩥ Audiogram. Answer: Written record of hearing threshold at specified
frequencies.
,⩥ Audiometer. Answer: a device that can present tones of different
frequencies, from low in pitch to high in pitch, at different volumes from
soft to loud
⩥ What dB at 3000 hz during an audiogram means the person can't hear
the tone?. Answer: 30 dB
⩥ Factors that affect absorption of noise. Answer: angle to noise source,
frequency of noise, density, condition/cleanliness, type of mounting,
shape of surface
⩥ To improve noise absorption through engineering controls, what
properties do you want?. Answer: Good porosity, thickness, air gaps
⩥ Emissivity. Answer: Ratio of radiation emitted by a surface to the
radiation emitted by a black body at the same temperature. A black body
is 1.0 (highest), down to 0 (bright, reflective surfaces).
⩥ Emissivity of bright metal surfaces. Answer: Low - less than 0.1
(bright metal is a good reflector), meaning it is good for reducing radiant
heat.
⩥ Emissivity of unpolished surfaces. Answer: Close to 1.0, which is
high, meaning not great for reducing radiant heat.
,⩥ Carpal tunnel affects what nerve and what parts of the hand?. Answer:
Median nerve. Thumb, pointer and ring fingers, NOT the pinky.
Inflammation and pain in the wrist. Thenar wasting is sign of advanced
disease.
⩥ Metal Fume Fever. Answer: Acute condition from brief high exposure
to metal fumes (e.g., zinc, magnesium, their oxides). Symptoms appear
from 4 to 12 hours after exposure -- fever, shaking chills (flu-like).
Recovery is quick. Workers can develop immunity, but a break and re-
exposure normally makes it worse.
⩥ What do altitude changes affect (and not affect) regarding fans?.
Answer: Horsepower needed (air has less mass), static pressure (not as
much needed). But the CFM (volumetric rate) is NOT changed by
altitude, and neither is RPM of the fan.
⩥ SCBA & airline respirator rules. Answer: Must be Grade D or higher;
can use high pressure air; oil pumped with filtering is acceptable.
Medical oxygen is NOT allowed - dangerous because of increased
flammability.
⩥ Abduction, adduction, flexion, extension. Answer: Adbuction:
increasing angle of arm to body, AWAY.
Adduction: decreasing angle of arm to body, TOWARD.
Extension: increasing angle of forearm to bicep.
, Flexion: decreasing angle of forearm to bicep.
⩥ Grade D breathing air. Answer: 19.5%-23.5% oxygen
<5 mg/m3 of oil
<10 ppm CO
<1000 ppm CO2.
⩥ TLV, PEL, IDLH for carbon monoxide. Answer: TLV of 50 ppm
(ACGIH); STEL of 400.
IDLH of 1500 ppm (NIOSH)
PEL of 35-50 (OSHA); ceiling is 200, instantaneous is 1500.
⩥ Carbon Monoxide (CO). Answer: Air pollution that is a product of
combustion of fossil fuels. Flammable, colorless, odorless, poisonous.
Chemical asphyxiate. Does NOT harm red blood cells, but reduces their
oxygen-carrying capacity.
⩥ Teratogen. Answer: an agent or factor that causes malformation of an
embryo or fetus. Does not propagate across generational lines.
⩥ Next best option to electric forklifts for emissions.. Answer: Convert
the forklift to LP gas.