CSP Domain 6: Occupational Health And Ergonomics Flashcards
What does OSHA consider a standard threshold shift (STS) for a hearing conservation program?
An average shift in either ear of 10 dB or more at 2000, 3000, and 4000 hertz
***Note employer has 21 days to notify employee of STS
Disorder that results from the narrowing of the tendon sheath that results from manual tasks involving radial or inward hand motions and firm grips
De Quervain’s disease
*Form of tenosynovitis
A suspension scaffold held up by rope or wire must be capable of supporting what weight?
6 times the load
Lifting frequency when using the NISOH lifting equation
Number of lifts in a 15 minute period
Type of hearing loss that occurs as a combination of conductive and sensorineural
Mixed
One substance does not have a toxic effect on a certain organ system; however, when it combines with another chemical, it makes the combination of the two greater
Potentiating
According to Epidemiological theory, what are some situational charecteristics?
Peer pressure
Risk assessment by individuals
Attitude
What is a major drawback to using canopy hoods?
The potential for the worker to place him or herself between the contaminant and the exhaust stream
What is the basic aim of industrial engineers and ergonomics
To fit jobs to people
What is the technical condition for carpenters elbow/tennis elbow/golfers elbow?
Epicondylitis
From the combined action of pronation of the hand and ulnar deviation
At what height must guardrails or other approved protection be in place for scaffolding?
10 ft
What focuses on behavioral and cognitive characteristics of performance and safety?
Human Factors Engineering
Type of hearing loss that occurs in the inner ear, damage to the organ of the corti occurs and is irreversible
Sensorineural
Which method is MOST commonly used to prevent falls?
Guardrails
What does the following symbol represent? L_(w)’
Sound power level
What is fact about reflective clothing:
It can stop the skin from absorbing radiant heat
Type of hearing loss that occurs in the outer or middle ear and the loss of “loudness” only occurs?
Conductive
The machine elements of the interface between man and machine are:
Controls
Machine Operation
Displays
What is the normal range of human hearing?
20-20,000 Hz
500-3,000 Hz is the frequency of human speech range
How do you modify a PEL or TLV for a work shift greater than 8 hours
(PEL or TLV x 8)/shift duration
What is the timeframe for employers to provide baseline audiograms (OSHA)?
Within 6 months of their first exposure above 8 hr TWA of 85 dB
What are the six characteristics of adult learners?
1) autonomous and self directed
2) goal orientated
3) foundation of life experiences and knowledge
4) relevancy orientated
5) need to be shown respect
6) practical in nature
What causes metal flume fever and what are the symptoms?
Caused by inhalation (and absorb ion through eyes) of copper flumes.
Eye, nose and throat irritation and other flu like symptoms
May also include a metallic or sweet taste in mouth
Positioning devices should be rigged so that the employee cannot free fall more than what distance
2 feet
What type of indicator is good for counter or digital displays?
Quantitative (requires minimum reading time with minimum reading error)
What does not have a correlation with development of Asbestosis
The age of the exposed person
According to Epidemiolgical theory, what are predisposition charecteristics?
Susceptibility of people
Perceptions
Environmental factors
Dilution ventilation is used to control:
- Contaminants of a moderate toxicity
- a large number of sources
- intermittent exposures
- where emission sources are well distributed
What units measure noise frequency and intensity?
Frequency= Hertz (Hz)
Intensity= Decibels (dB)
The combined effects of two chemicals interferes with each other
Antagonistic
When replacing fluids during work in hot environments, which rule should be followed?
The worker should drink an amount of fluid equal to the amount he or she sweats.
The combined effects of chemicals is equal to the sum of each acting independently
Additive
How long does it take for a person to acclimatize to heat?
2 weeks
What is rule of thumb for acclimatizing people to extreme temperature changes in work environment?
Expose them to extreme temps for approximately 20% on each day for 5 days
Caused by compression of the median nerve, median artery, and tendons in wrist
Carpel tunnel syndrome
Tendons pass through carpel tunnel of wrist
What is the PEL for Benzene?
1 ppm
What should be the first ergonomic adjustment for a computer workstation
Chair height
Next is getting work surface height correct (monitor/keyboard)
What is the latency period for mesothelioma?
20-30 years
An employer is required to do what to all employees who are reasonably anticipated to have exposure to blood and other potentially infectious material?
- Make Hep B vaccinations available free of cost
- Post exposure evaluation and follow up
- Must take a written statement of refusal from employee if they refuse vaccination.
Which injury is associated with vibration?
Raynaud’s syndrome
Results of repetitive use of individual fingers for the operation of switches and buttons
Trigger finger
When the combination of two chemicals is much greater than the sum effect of each agent acting dependently
Synergistic
What is the OSHA PEL for formaldehyde?
0.75 ppm
What are the workload categories as per the CSHO?
Light work: up to 200 kcal/hr
Medium work: 200-350 kcal/hr
Heavy work: 350-500 kcal/hr
Which symptoms are associated with chronic exposure to manganese?
Multiple mental,cognitive and emotional disorders along with neurological disorders that effect muscles, speech and movement
*No known respiratory effects
What are some examples of static collectors?
Copper combs
Metallic tinsel
Copper Brushes
What is the latency period for asbestosis?
10 to 20 years
According to the NIOSH lifting equation, the horizontal locations is defined as:
The distance of the hands away from the midpoint between the ankles in inches or centimeters
According to the NIOSH lifting equation, the vertical location is defined as:
The distance of the hands above the floor
According to the NIOSH lifting equation, the asymmetry angle is defined as:
The angular measure of how far the object is displaced from the front of the worker’s body at the beginning or end of the lift.
What is the safety zone in regards to hard hats?
The space between the hard hat and the suspension which should be a minimum of 1 inch up to 1 1/4 inches
Occurs when a tendon sheath swelling is filled with synovial fluid. Commonly found on the radial side of the wrist.
Ganglion Cyst, type of CTD
CTD known as roofer’s knee or carpet layers knee
Prepatellar Bursitis
Funnel CHest
Inherited condition. Known as Pectus Excavatum.
NOT a CTD
What are the primary standards of calibration for air sample pumps?
- Spirometer
- Bubble Burette
- Electronic soap bubble flow meter
What are the secondary standards for calibrating air sampling pumps?
Wet test gas meter
Dry gas meter
Rotameters
What material is associated with renal failure
Cadmium
When using a dosimeter that is not capable of C-Weighted measurements, what methods can be used for assessing hearing protector adequacy?
- convert A weighted dose to TWA
- Subtract 7 dB from the NRR
- Subtract the reminder from the A weighted TWA to obtain estimated A weighted TWA under ear protector