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NAVOSH UNIT 5 > 5-5 HEAT STRESS > Flashcards

5-5 HEAT STRESS Flashcards

1
Q

Who will be required to perform heat stress
monitoring and provide recommendations to the chain of command

A

The Independent Duty Corpsman

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2
Q

What is Heat Stress

A

combination of air temperature, thermal radiation, humidity, airflow, and
workload which stresses the body as it attempts to regulate temperature

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3
Q

Environmental Factors Causing Heat Stress

A

Thermal Radiation
Ventilation
Humidity-moisture in the air
Air/Sea Water Temps

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4
Q

Examples Thermal Radiation

A

(a) Sun
(b) Heat Source (Incinerator, Engines, generators, Laundry Dryers, etc.)

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5
Q

Examples of Ventilation

A

(a) Forced Air Systems – Intake of Outside Air into Workspace
1) Spot-Cooling
(b) Forced Exhaust Systems – Removes stagnant or increased concentrations of
hazardous fumes or contaminants
1) Red Devil Blowers

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6
Q

Examples of Humidity

A

(a) Steam Leaks
(b) Bilge Water
(c) Condensation

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7
Q

Examples of Air/Sea Temperature

A

Intake Valves that allow Sea water/Outside Air to
be utilized for cooling for shipboard equipment systems.
(a) Refrigeration units
(b) Engines
(c) Generators
(d) Evaporators for Fresh Water Consumption

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8
Q

What is Acclimatization

A

The act of becoming accustomed to temperature or new environment

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9
Q

Time frame for acclimatzation?

A

generally, 3 weeks or more

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10
Q

Personal Factors with Heat Stress

A

(1) Past exposure to heat injuries will affect an individual’s ability to adapt to new
situations.
(2) Current health status and use of medications may alter physiological body
changes
(3) Exercise and fluid intake (dehydration)
(4) Medication
(5) Alcohol Intake
(6) Lack of sleep
(7) Drugs

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11
Q

2 blood disorders that can impact ability to handle heat stress

A

1 G6PD
2 Sickle Cell Trait

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12
Q

Common locations of heat stress conditions

A

Heat Stress can occur in any space of the ship.
(a) Machinery Spaces
(b) Laundries
(c) Sculleries (PHEL V)/Galleys
(d) Incinerator Room
(e) Flight decks

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13
Q

Causes and contributors to heat stress conditions

A

(1) Steam and Water Leaks
(2) Boiler Air Casing Leaks
(3) Missing/Deteriorated Thermal Insulation
(4) Ventilation Deficiencies
(5) Weather Conditions
(6) Arduous Operation

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14
Q

what does PHEL stand for?

A

Physiological Heat Exposure Limits

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15
Q

What is a Physiological Heat Exposure Limit (PHEL) Chart

A

set of 6 curves that compare the WBGT index and the degree of effort or work rate

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16
Q

Who and when establishes PHEL curves?

A

Industrial Hygienist and NAVSEA & when class of ship is placed into service

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17
Q

Who determines individual heat stress condition locations?

A

Industrial Hygienist

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18
Q

4 types of PHEL curve assignments

A

(a) Routine operations
(b) Non-routine operations (ventilation being secured)
(c) ECC Exercises
(d) Heavy work load (Assign stay time using PHEL VI)

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19
Q

What is Stay Time?

A

Maximum allowable time personnel may work in heat stress conditions

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20
Q

What is Recovery Time?

A

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

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21
Q

What is Fuel Combustion Gases (stack gases)

A

gases which may accumulate in a space due to inadequate
ventilation.

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22
Q

Physiological Effects of stack gases

A

increased by heat stress conditions.
S/S include:
1) Watery eyes
2) Dyspnea
3) Tingling or numbness of the tip of the tongue, tip of the nose, finger tips or toes.
4) Mild sensation of alcohol intoxication

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23
Q

Action required when exposed to stack gases?

A

1) Reduce exposure limits if two or more of the exposure symptoms are detected.
2) divide current PHEL stay-time by 3

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24
Q

who conducts Heat stress training and when?

A

MDR.
Upon check in and annually.

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25
Q

Minimum Heat stress training must include?

A

(a) Hazards
(b) Symptoms of Exposure
(c) Heat Stress First Aid
(d) Heat Stress monitoring
(e) Causes of Heat Stress

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26
Q

Heat Stress monitors must receive training within?

A

12 weeks upon assignment and must complete Watch station 318 in PQS.

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27
Q

How to report an accident or injury report?

A

Report to Navy Safety Center by using Web Enabled Safety System (WESS)

28
Q

All Navy heat stress injuries are reported through?

A

Naval Disease Reporting System (NDRS)

29
Q

What do you do if command does not have access to NDRS?

A

Use Medical Event Report

30
Q

Who reviews Heat stress monitoring report for inaccuracies and QA?

A

SMDR

31
Q

Who notates existing problems and implements corrective action?

A

Supervisor or Engineering Officer of the Watch (EOOW)

32
Q

Heat Stress surveyor must check to ensure that

A

WB < DB; GT ≥ DB; and WB < WBGT < GT

33
Q

Who is informed of STAY TIMES during Engineering Casualty or Damage Control Training Team drills?

A

Drill supervisor

34
Q

Who does the Heat stress survey get routed too?

A

XO/CO

35
Q

Submitting routine reports w/ no admin controls?

A

8’oclock reports

36
Q

Heat Stress surveys with REDUCED stay times must routed through?

A

Chain of Command to CO

37
Q

Who maintains reports and for how long?

A

SMDR / 1 year

38
Q

Who do you generate digital reports and from what system?

A

ISIC or higher authority. SAMS

39
Q

Dry bulb thermometer

A

Measures the ambient air temperature at work sites

40
Q

Correct placement of Hanging dry bulb

A

permanently mounted at watch and work stations where heat stress may
exist and properly shielded from radiant heat levels

41
Q

Dry bulb must be within how many degrees of WBGT

A

5 degrees F

42
Q

If dry bulb is not within 5 degrees of WBGT?

A

DB must be re positioned

43
Q

Time frames to read DB Temps?

A

Every 4 hours for manned spaces that don’t exceed 85 degrees.

44
Q

DB must recorded hourly when?

A

If there is a heat casualty, and if DB exceeds 85 degrees F.

45
Q

Recording Routine DB Temps

A

a) Recorded on appropriate log sheet.
b) Reviewed by supervisor once each watch or shift

46
Q

Recording High DB Temps

A

a) Circle in red 100° F or higher DB temperatures.
b) Notify Supervisor Immediately.
c) Heat Stress Monitor shall monitor all workstations with WBGT Meter. (conduct heat stress survey)

47
Q

Heat stress monitor sheet

A

Dry Bulb Temperatures shall be recorded on the Heat Stress Monitoring
Sheet during WBGT monitoring

48
Q

Dry bulb Temperature sensor

A

Measures ambient (alcohol-in-glass thermometer whose
bulb is kept dry and shielded from radiation.)

49
Q

Wet bulb temperature sensor

A

Humidity (has a wet wick is fitted closely over the bulb or sensor).

50
Q

Globe Temperature sensor

A

Radiant (integration of radiant and convective heat transfer.

51
Q

what makes up WBGT Index?

A

Dry Bulb
Wet Bulb
Globe Temp

52
Q

Equation for WBGT Index

A

(0.1 x DB)+(0.7 x WB)+(0.2 x GT)

53
Q

Purpose of WBGT Index?

A

determine the Physiological Heat Exposure Limit (PHEL) and Environmental heat stress conditions

54
Q

2 types of WBGT

A

a) RSS-220 - WBGT Meter
b) QUESTemp 48N Heat Stress Monitor

55
Q

PHEL I through III

A

When watch station length is 4 hours or LESS and DB is equal to or greater than 100 degrees.
OR
Greater than 4 hours and DB is equal to or greater than 90 degrees.

56
Q

Phel IV through VI

A

When DB is equal or greater than 85 degrees.

57
Q

Report monitoring conditions for drills that exceed how long?

A

3 hours

58
Q

RSS 220 WBGT Wait time and time between readings?

A

5 minutes and 3 minutes

59
Q

Hold how far away from body with RSS 220 WBGT?

A

1 foot (12 in) at chest level

60
Q

QUESTemp 48N battery voltage?

A

6.4 or less replace battery

61
Q

QUESTemp 48N calibration time in space?

A

10 minutes and 5 minutes if moved to another site

62
Q

how far away do you hold the QUESTemp 48N?

A

18” away from the body at chest level.

63
Q

AHSS

A

Automated Heat Stress System (need 2 WBGT if ship has AHSS)

64
Q

All WBGT readings should have the following documented.

A

1) Specific locations monitored
2) Hanging DB temperature
3) WBGT Readings to include DB, WB, GT, and WBGT Index
4) Determined Exposure Limits
5) Next WBGT monitoring time
6) Availability of Potable Water
7) Manual Calculation of the WBGT Index
8) Any noted discrepancies such as missing lagging.
9) Circle in red all exposure limits less than the watch period.

65
Q

Proper routing of survey

A

(a) Immediately notify the supervisor.
(b) Supervisors (DH) shall notify CO with:
1) Condition
2) Personal Protective Measures
3) Action to reduce heat

NAVOSH UNIT 5 (8 decks)

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