NAVOSH 5-5-2 Heat Stress Monitoring Program

Question 1

Who performs Heat Stress monitoring?

Answer 1

The IDC

Question 2

Define Heat Stress

Answer 2

A combination of air temp, thermal radiation, humidity, airflow, and work load which stress the body as it attempts to regulate temp.

Question 3

When can Heat injury/death occur?

Answer 3

When heat stress is excessive and exceeds and increases the body’s temperature.

Question 4

What environmental factors cause Heat Stress?

Answer 4

Thermal Radiation
Ventilation
Humidity
Air/sea Water Temp

Question 5

What is thermal radiation?

Answer 5

Sun
Heat source (incinerator, engines, generators, laundry dryers, etc.)

Question 6

What is Ventilation air flow?

Answer 6

Forced air systems: Intakes outside air into workspaces (Spot cooling)

Forced Exhaust systems: Removes stagnant or excess contaminants in the air. (red Devil Blowers)

Question 7

What is Humidity?

Answer 7

Moisture in the air
-Steam leaks
-Bilge water
-Condensation

Question 8

What is Air/sea Water Temp?

Answer 8

Intake valves that allow sea water or outside air to be utilized for cooling shipboard equipment.
(Refrigeration Units, Engines, Generators, Evaporators)

Question 9

What is acclimatization?

Answer 9

The act of becoming accustomed to temperature or new environment.

Question 10

How long does it typically take to become acclimatized?

Answer 10

Usually 3 weeks or more.

Question 11

Do past exposures to heat injury affect the induviduals ability to adapt?

Answer 11

Yes

Question 12

What health conditions affect Heat Stress?

Answer 12

G6PD
Sickle Cell Trait

Question 13

What are personal factors associated with Heat Stress?

Answer 13

Past exposure
Change in health status
Exercise and fluid intake
Medication
Alcohol Intake
Lack of Sleep
Drugs

Question 14

Where does Heat Stress typically occur on the ship?

Answer 14

Machinery Spaces
Laundries
Sculleries/Galleys
Incinerator Room
Flight Decks

Question 15

What are causes and contributors to Heat Stress?

Answer 15

-Steam and Water Leaks
-Boiler Air Casing Leaks
-Missing/Deteriorated Thermal Insulation
-Ventilation Deficiencies
-Weather Conditions
-Arduous Operations

Question 16

What does PHEL stand for?

Answer 16

Physiological Heat Exposure Limits

Question 17

How many curves does PHEL have?

Answer 17

6 Curves.

Question 18

What do the curves indicate?

Answer 18

They compare the WBGT index and degree of work rate to determine max exposure time to the heat.

Question 19

Who established the PHEL curves and work rates?

Answer 19

Industrial Hygienist and NAVSEA.

Question 20

Who determines individual Heat Stress locations?

Answer 20

The Industrial Hygienist.

Question 21

What are some examples of Routine Operations?

Answer 21

Light work
-Sweeping down
-Painting
-Cleaning lube oil strainers

Question 22

What are some examples of Non-routine Operations?

Answer 22

Ventilation being secured.

Question 23

What do you need to do for Non-routine operations?

Answer 23

1. Use the next higher PHEL
2. Increase normal watch stander work rate and minor equipment casualty.

Question 24

What does ECC stand for?

Answer 24

Evacuation Control Center drills

Question 25

What are some examples of Heavy work loads?

Answer 25

-Replacing large valves. -Cleaning lube oil sumps -Disassembly and reassembly of large or heavy equipment.

Question 26

What does Stay Time mean?

Answer 26

The maximum allowable time personnel may work in Heat Stress conditions.

Question 27

What is recovery time?

Answer 27

Minimum of twice the Stay time OR 4 hours (whichever is shorter)

Question 28

What are Fuel Combustion Gasses (Stack Gas)?

Answer 28

May accumulate in a space due to inadequate ventilation or machinery malfunction.

Question 29

What are the Symptoms of Stack Gas?

Answer 29

-Causes vasodilation of peripheral blood vessels. -Watery eyes -Dyspnea -Paresthesia -Mild sensation of alcohol intoxication

Question 30

What do you do if the sailor has 2 or more symptoms of stack gasses?

Answer 30

Reduce exposure limits by determining new PHEL OR divide current PHEL stay time by 3.

Question 31

When does the MDR provide Heat Stress training?

Answer 31

Initially during Indoc and annually.

Question 32

What film is played during Heat Stress training?

Answer 32

"Play it Cool: Heat Stress Prevention Afloat". for all Hands.

Question 33

What must heat stress training include at a minimum?

Answer 33

-Hazards -Symptoms of Exposure -Heat Stress First-Aid -Heat Stress Monitoring -Causes of Heat Stress

Question 34

How soon do Heat Stress Monitors need to recieve the training?

Answer 34

12 weeks upon assignment.

Question 35

What additional training requirements do you need for Heat Stress training?

Answer 35

-Complete Heat Stress Survey -Complete watch station 318 of the Safety Programs Afloat PQS (NAVEDTRA 43704)

Question 36

What are the 3 ways to report Heat Stress injuries?

Answer 36

-Naval Safety Center using Web Enabled Safety System (WESS) -Naval Disease Reporting System (NDRS) -Medical Event Report format in no access to NDRS

Question 37

What must the Heat Stress surveyor ensure?

Answer 37

WB

Question 38

Who reviews Heat Stress surveys and who do they get routed to?

Answer 38

-Reviewed by SMDR -Routed to XO/CO.

Question 39

Routine reports with no administrative action need to be reported by when?

Answer 39

Submit at 8 o'clock reports (2000 time frame)

Question 40

Who maintiains the reports and for how long?

Answer 40

SMDR maintains them for 1 year.

Question 41

Who assigns and qualifies supervisors to review DB temperatures?

Answer 41

Engineer Officer

Question 42

Where do you place Hanging Dry Bulbs?

Answer 42

-Permanently mounted at watch and work stations where heat stress exist. -Temporarily mounted at temp work sites. - Must be properly shielded from radiant heat

Question 43

How accurate does the Hanging Dry Bulb need to be?

Answer 43

Within 5 degrees of the WBGT. If not must be repositioned.

Question 44

How often do you read the DB temperature?

Answer 44

Every 4 hours if <85℉ Hourly if: -Heat Casualties -DB temp >85℉

Question 45

How do you record the DB temperature?

Answer 45

Reviewed by the supervisor once each watch or shift -Circle in red temps >100℉, and notify supervisor immediately.

Question 46

What is the WBG Index?

Answer 46

A measurement of environmental conditions. Is a weighted average of DB, WB, GT. -Helps determine PHEL

Question 47

What are the 2 types of WBGT?

Answer 47

RSS-220-WBGT Meter QUESTemp 48N Heat Stress Monitor

Question 48

If the watch/workstation length is <4hrs and DB is ≥100℉...

Answer 48

PHEL I-III

Question 49

If the watch/workstation length is >4hrs and DB is ≥90℉...

Answer 49

PHEL I-III

Question 50

If the DB is ≥85℉...

Answer 50

PHEL IV-VI

Question 51

WHen are you required to do a Heat Survey?

Answer 51

-Heat casualty -During a drill ≥3hrs in duration -CO's discretion

Question 52

When do you do follow on surveys?

Answer 52

If the DB temp increases by more than 5℉ from HDB in previous survey.

Question 53

What is the acceptable range for calibration checks?

Answer 53

100.0℉ + or -0.2℉

Question 54

What are the survey procedures for the RSS-220?

Answer 54

-Wait 5min initially and 3min for subsequent readings. - Ensure ventilation is normal and DB/WB face air flow -Hold at chest level 1' away from body.

Question 55

What are the survey procedures for the Questemp 48N?

Answer 55

Wait 10 min initially and when switching workspaces, 5 min subsequent. -Hold at chest level 18" away from body.

Question 56

Why must ships with Automated Heat Stress Systems (AHSS) have at least 2 portable WBGT?

Answer 56

In case one breaks or malfunctions.

Question 57

Who do you route the Survey to?

Answer 57

Immediately notify Supervisor (DH) who will notify the CO.

Question 58

What 3 things does the Supervisor (DH) notify the CO with?

Answer 58

-Condition -PPE -Action to reduce heat (Will all be noted on the Heat Stress Monitoring Sheet)