NAVOSH Test 2 Flashcards
What is the definition of HEAT STRESS?
- Combo of air temp, thermal radiation, humidity, airflow, and workload which stress the body as it attempts to regulate temp.
- becomes excessive when the body’s capability to adjust is exceeded, resulting in increase of body temp
- ** can cause heat injury or death***
What is thermal radiation?
Sun or major heat source
What is humidity?
Moisture in the air from - steam leaks, bilge water, condensation
What is acclimatization?
Becoming used to temperatures or new environment
body becomes more efficient in coping with stress
usually takes 3 weeks or more
What are some personal factors associated with Heat Stress?
- past exposures effect body’s ability to cope
- decrease in ability to handle heat stress
- exercise/fluid intake
- medication
- alcohol intake
- lack of sleep
- drugs
Shipboard spaces common for heat stress?
- Machinery spaces
- laundry
- sculleries
- incinerator room
- flight deck
What are some causes/contributors of heat stress conditions?
- Steam water leaks
- Ventilation deficiencies
- Arduous operation
- **boiler leaks
- **missing thermal insulation
- **weather conditions
What is PHEL?
Physiological Heat Exposure Limit chart
What does the PHEL chart do?
Set of 6 curves that compare WBGT index and work rate
- maximum permissible exposure to heat stress
Who established PHEL curves?
Industrial Hygienists and NAVSEA for various classes of ships
What is Stay Time?
Max allowable time for heat stress conditions at various workload
What is recovery time?
minimum of TWICE the stay time, or 4 hours
What is stack gas?
Combustion gases that accumulate from machinery
Signs and symptoms of stack gas?
- Watery eyes
- dyspnea
- tingling/numbness in nose, tongue, fingers/toes
- sensation of alcohol
What must Heat stress training include?
- Hazards
- SX of exposure
- heat stress first aid
- heat stress monitoring
- causes of heat stress
At what point must heat stress monitors receive training?
12 weeks upon assignment
- complete heat stress surveyor watch 318 of SAFETY PROGRAMS AFLOAT PQS
What are the requirements for reporting heat stress injuries?
- report using ACCIDENT/INJURY REPORT
- report to NAV Safety Center using WESS
- Safety Officer Submits report*
What is the process to make Heat Stress Surveys?
- SMDR reviews for inaccuracies/QA checks
- makes recommendations
- SUP/ENG OOW will make notations/corrective actions
- Route to CO/XO
- SMDR will maintain record of reports for 1 year
What happens when Heat Stress Surveys have reduced stay times?
- Must be routed through Chain/CO for work shift alterations to occur
How often are temperatures on DB measured?
Every 4 hours
Above what Temp do we need to be concerned of going above in spaces?
85 deg
What is the process of annotating high temperatures on paperwork?
- Circle in RED anything above 100 deg
- notify SUP immediately
What is the function of the dry bulb?
- alcohol in glass thermometer
- bulb kept dry/shielded from radiation
Wet Bulb temp sensor?
- measured by thermometer
- similar to dry bulb/wet wick fitted closely over bulb
Globe temp sensor?
- integration of radiant/convective heat transfer
WBGT index?
Measurement of environmental conditions
- (0.1xDB)+(0.7xWB)+(0.2xGT)
What is the only approved WBGT meter/monitor?
RSS-220 - WBGT Meter
What are the required Monitoring conditions with PHEL?
- PHEL I-III - Work time <4 Hours, DB>100deg
- PHEL I-III - work time >4Hours, DB>90deg
- PHEL IV-VI - DB >85Deg
When are follow on surveys required?
DB temp +5 degrees over HDB temp on last survey
RSS-220 WBGT Meter calibration req’s/survey procedures?
- calibration ok = 100 degree +/- 0.2 degrees F
- Survey - wait 5 min for initial reading, then 3 min for subsequent
- hold WBGT at chest level about 1 foot from body
QUESTemp 48N Heat Stress monitor?
- 10 min to get first reading when turned on
- 5 minutes when on at new site for reading
What is a Hazard?
- might result in injury, health impairment, illness, disease, or death
- damage or loss of property/equipment
Hazard Severity?
Assessment of worst potential consequence likely to occur
Injury?
traumatic wound or condition from external force