100% CORRECT!!
Presbycusis - ANSWERHearing loss due to old age
Presbyopia - ANSWERimpaired vision as a result of aging, difficulty focusing
Byssinosis - ANSWERDisease 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? - ANSWERYes, for 3 days or until
corrected.
Audiogram - ANSWERWritten record of hearing threshold at specified frequencies.
Audiometer - ANSWERa 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? -
ANSWER30 dB
Factors that affect absorption of noise - ANSWERangle 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? - ANSWERGood porosity, thickness, air gaps
Emissivity - ANSWERRatio 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).
Metal Fume Fever - ANSWERAcute 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? -
ANSWERHorsepower 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 - ANSWERMust 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 - ANSWERAdbuction: 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 - ANSWER19.5%-23.5% oxygen
<5 mg/m3 of oil
<10 ppm CO
<1000 ppm CO2.
TLV, PEL, IDLH for carbon monoxide - ANSWERTLV 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) - ANSWERAir 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.
Emissivity of bright metal surfaces - ANSWERLow - less than 0.1 (bright metal is a
good reflector), meaning it is good for reducing radiant heat.
Emissivity of unpolished surfaces - ANSWERClose to 1.0, which is high, meaning
not great for reducing radiant heat.
Carpal tunnel affects what nerve and what parts of the hand? - ANSWERMedian
nerve. Thumb, pointer and ring fingers, NOT the pinky. Inflammation and pain in the
wrist. Thenar wasting is sign of advanced disease.
Teratogen - ANSWERan 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. - ANSWERConvert the forklift to
LP gas.
Double insulation does not protect against shock in what circumstance? -
ANSWERWater, wet locations
(Data terms) Random, stratified, systematic, cluster - ANSWERRandom: everyone
has an equal change. Stratified: separated by layers. Systematic: patterned
response. Cluster: confined to a location.
,pH less than 7 - ANSWERacid
pH greater than 7 - ANSWERbase
activated carbon - ANSWERA form of specially treated, porous carbon, used to
absorb various odors and vapors. Has a non-polar surface.
Axial flow fans - ANSWERHigh volume and low pressure drop; general & dilution
ventilation; NOT good for LEV; NOT used to move air through a duct; sometimes
used for comfort.
Centrifugal fans - ANSWERFan axis is perpendicular to flow -- spits air out 90
degrees. Low noise. Suited to high pressures. Low to moderate static pressures;
used in heating & air conditioning; workhorse of industrial hygiene; sometimes called
squirrel cages; good for lint, wood chips & dust.
Forward blades in centrifugal fan - ANSWERBlades are curved in the direction of
rotation. Used whenever a large air volume has to be moved in a tight space.
Requires more power, which can overload motors.
Backward blades in centrifugal fan - ANSWERBlades are curved in the opposite
direction of rotation. More efficient than forward blades.
Paddle wheel or long-shaving wheel - ANSWERUsed with medium tip speed for
buffing exhaust, woodworking exhaust or when heavy dust must pass through the
fan.
Max travel distance of fire extinguisher in light hazard occupancies - ANSWER75 ft.
Includes places like churches, clubs, education centers, kennels, museums, homes.
Inspection items for self-closing doors - ANSWER1) Lubrication on guides &
bearings
2) Binders are not bent, thus obstructing door
3) Chains/wire ropes have not stretched.
4) Fusible links are NOT painted.
Main cause of sprinkler system failure - ANSWER35% of the time: closed water-
supply valves.
Main cause of leaking sprinkler heads - ANSWEROverheating from being too close
to heat-generating processes.
How often should sound level meters be calibrated? - ANSWERBefore & after each
survey
Particle sizes - ANSWERLarge: silica
Small: zinc
Safest method to determine electrical current - ANSWERSplit-core ammeter
, Treating exposure to liquid oxygen - ANSWERWarm water. Never rub or use dry
heat. Frozen tissue is painless but will be swollen & painful when thawed.
Required languages for HAZCOM - ANSWEROnly English. Others can be used in
addition, but only English is required.
TTS - ANSWERtemporary threshold shift. Will experience a transient attenuation.
PTS - ANSWERpermanent threshold shift. One theory is that these result from many
TTSs.
Butyl/neoprene gloves - ANSWERGloves that made of a synthetic rubber and
protect against wide variety of chemicals -- acids, bases.
3 components of every noise problem - ANSWERSource, path, receiver
Training requirements for HAZWOPER - ANSWERsite workers, spill response, PPE
TLV - ANSWERThreshold Limit Value. All employees can be exposed daily without
adverse health effects.
Autoignition Temperature - ANSWERThe lowest temperature at which a combustible
material ignites in air without a spark or flame.
Rules on Danger Tags under 1910.145 (accident prevention signs & tags) -
ANSWER1) Readable at 5 ft
2) Must use words, pictures or both.
3) As close as possible to the hazard.
4) Employees must be informed on sign meanings.
5) Positive, concise, standardized.
Hierarchy of Safety and Health Controls - ANSWER1) Elimination
2) Substitution
3) Engineering Controls (ex. LEV)
4) Warnings/Administrative (ex. LOTO, work/rest)
5) Personal Protective Equipment
ANSI Z10 puts Warnings as #4 and Admin as #5
Thermal vane anemometer - ANSWERUsed where exhaust opening is large, air
velocities are low --> spray booths or chemical hoods. Heated probe that senses
velocity by the amount of heat removed from the probe. Direct reading & accurate.
Rotating vane anemometer - ANSWERUseful for measuring the airflow through large
supply and exhaust openings where the air velocities are relatively high.
Components measured in industrial effluents - ANSWERbiochemical oxygen
demand, total suspended solids, metal content, temperature.
NPDES - ANSWERNational Pollutant Discharge Elimination System (EPA permit)