Heat stress monitoring program

Question 1

Define the meaning of heat stress?

Answer 1

A combination of air temperature, thermal radiation, humidity, airflow and work load which stress the body as it attempt to regulate temperature.
Hot stress becomes excessive when the body’s capability to adjust is exceeded resulting in an increase of body temp. This can cause heat death.

Question 2

Name the Factors that cause heat stress?

Answer 2

Thermal radiation
Ventilation airflow
Humidity
Air/sea water temperatures

Question 3

Which are types of thermal radiation?

Answer 3

Sun 
heat source ( incinerators, engines, generators, laundry dryers.

Question 4

Ventilation airflow factors

Answer 4

Forced air systems
Forces exhaust system( removes stagnant or increased concentration of hazardous fumes or contamination such as red devil blower

Question 5

Humidity factors ?

Answer 5

Steam leaks
Bilge water
Condensation

Question 6

Air/sea water temperature factors

Answer 6

refrigeration units
engines
generators
evaporators for fresh water consumption

Question 7

What is acclimatization?

Answer 7

The act of becoming accustomed to temperature or new environment
The body becomes more efficient in coping with heat stress

Question 8

How does acclimatization occurs ?

Answer 8

Gradually, usually after 3 weeks or more

Question 9

current health status and use of medications that may alter physiological body changes

Answer 9

G6PD
Sickle cell trait 
exercise and fluid intake 
medication 
alcohol intake 
lack of sleep
drugs

Question 10

What does PHEL stands for?

Answer 10

Physiological Heat stress level

Question 11

What is the PHEL chart ?

Answer 11

A set of curves that compare the WBGT index and the degree of efforts or work rate to determine the maximum permissible exposure to the heat stress

Question 12

Whos stablish the PHEL curves and work rates ?

Answer 12

The industrial hygienist

Question 13

Which are the type of operations PHEL is assigned ?

Answer 13

Routine operations
non routine operations
ECC exercises
Heavy work load (assigned stay time using PHEL VI)

Question 14

What is stay time ?

Answer 14

Maximum allow time personnel may work in heat stress conditions at a given work load

Question 15

What is recovery time ?

Answer 15

Is define as a minimum of twice the stay time as determined by the PHEL chart or 4 hours whichever is shorter

Question 16

What does fuel combustion gases can cause on personnel and what are the symptoms ?

Answer 16

Cause vasodilatation or peripheral blood vessels which results in further impartment of the cardiovascular system
watery eyes
dyspnea
tingling or numbness of the tip of the tongue, tip of the nose, finger tips or toes
mild sensations of alcohol intoxication

Question 17

Who provides heat stress training and when?

Answer 17

The MDR for new personnel at indoc and annually there after ?

Question 18

What are the trainings the MDR must conduct for personnel ?

Answer 18

Hazards 
symptoms of exposures 
heat stress first aid 
heat stress monitoring 
causes of head stress

Question 19

Heat stress monitors must received training within how long ? and what training ?

Answer 19

12 weeks/ 3 months

Heat stress surveyor watch station 318 of the safety programs afloat personnel PQS NAVEDTRA 43704

Question 20

What are the reporting methods for heat stress injuries ?

Answer 20

1. Naval Safety Center (by safety Officer) using web enable safety system WESS
2. Heat stress related injuries through the Naval disease reporting system NDRS

Question 21

What heat stress reporting system should you used when NDRS is not available ?

Answer 21

The medical event report format

Question 22

All heat stress surveys will be review for inaccuracies and QA checks by whom?

Answer 22

SMDR

Question 23

All heat stress reports will be maintained by the SMDR for how long ?

Answer 23

1 year

Question 24

What does a dry bulb thermometer do?

Answer 24

Measures the ambient air temp at work sites where heat stress conditions exist

Question 25

Which dry bulb must be properly shielded from radiant heat levels or other influencing (heat/cold) factors?

Answer 25

Hanging dry bulb

Question 26

What are the DB temperatures to monitor and the time in between checks ?

Answer 26

85 degrees F and below every 4 hours
86 and above every hour as well as when heat casualties occur
Circle and notify supervisor of temp 100 degrees or higher

Question 27

What does each heat stress meter measures ?

Answer 27

Dry bulb; ambient
Wet bulb; humidity
GT; radiant temperature (air movement)
WBGT; weighted average of DB,WB, GT

Question 28

What is the equations to determinate WBGT index ?

Answer 28

0.1xDB+0.7xWB+0.2XGT

Question 29

Which are the approved WBGT meters ?

Answer 29

RSS-220-WBGT meter

Quest temp 48N heat stress monitor

Question 30

Permanent hanging DBs should follow this PHEL when temp reaches and exceeds ?

Answer 30

PHEL I through III when 4 hours work or less and DB is greater than 100
PHEL I thought III when is greater than 4 hours and DB is equal or greater than 90
PHEL IV through VI when DB is equal or greater than 85 degrees
casualty occurs,
drills longer than 3 hours,
directed by the CO

Question 31

RSS-220 calibrations checks, and set up

Answer 31

acceptable range 100.0+ or - 0.2 degrees F
wait 5 min for first DB reading and 3 min for subsequent ones
ensure ventilation is arrange normal
DB/WB sensors should face air flow
Hold WBGT meter at chest level approx 1 foot away from body

Question 32

QUEST Temp 48N set up

Answer 32

6.4 volt equal or less, lace rep

Question 32

QUEST Temp 48N set up

Answer 32

6.4 volt equal or less, replace or recharge battery
10 min to initial reading when moved in the same area 5 min on each side
hold 18 inches away from body

Question 33

If the ships has an automated heat stress system AHSS, what portable equipment should you have regardless ?

Answer 33

two portable WBGT