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PMT > Heat Stress > Flashcards

Heat Stress Flashcards

1
Q

Is any combination of air temperature, thermal radiation, humidity, airflow, workload, and health conditions that may stress the body as it attempts to regulate body temperature

A

Heat Stress

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2
Q

To obtain accurate and reliable data on heat stress conditions, the ship must conduct

A

Heat stress survey: dry bulb, wet bulb, and globe temperature readings

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3
Q

How are the temperatures recorded?

A

WBGT meter

Automated Heat Stress system ( AHSS)

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4
Q

What are used to determine how long an individual may be exposed safely to heat stress conditions

A

WBGT index and physical exertion

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5
Q

Locations that are most likely to have conditions that may cause heat stress

A 
Machinery spaces
Laundries
Sculleries
Galleys
Flight decks
Steam catapult
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6
Q

Continued exposure to heat stress causes a series of physiologic adaptations, where the body becomes more efficient in coping with the heat stress

A

Acclimatization

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7
Q

Acclimatization occurs gradually, usually requires how many weeks?

A

3 weeks

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8
Q

`1. Establish and enforce an effective heat stress policy

  1. Review and initial daily, heat stress surveys that result in reduced stay times.
  2. Conduct an inquiry into the circumstances surrounding all heat injuries that result in unconsciousness.
  3. Report to the ISIC those material deficiencies, beyond ship’s force capability to correct, which contribute to heat stress conditions aboard the ship.
  4. Ensure at least two portable, calibrated, and operable WBGT meters are available onboard.
A

CO Responsibility

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9
Q
  • Ensure heat stress injuries are reported.

- Ensure the program is evaluated at least annually

A

Safety Officer

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10
Q

Review all heat stress surveys to determine obvious inaccuracies, reduced PHEL stay times, and any personnel protective actions being taken.

A

MDR

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11
Q

Submit heat stress surveys that result in reduced stay times to the commanding officer daily for review

A

MDR

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12
Q

The SMDR Maintain originals of all heat stress surveys for?

A

1 year.

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13
Q
  • Provides training
  • Report all cases of heat stress related injuries to the safety officer.
  • Conduct heat-stress surveys of all spaces not under engineering as needed.
A

MDR

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14
Q

Ensure DB thermometers are installed and maintained and temperatures are monitored and recorded

A

CHENG

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15
Q

Assign engineering department personnel to perform heat stress surveys in engineering spaces and ensure they are qualified

A

CHENG

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16
Q

Assign and qualify supervisors to review DB temperatures or access AHSS readings and take the required actions

A

CHENG

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17
Q

Review heat stress surveys and ensure stay times for engineering or reactor personnel are being properly determined.

A

CHENG

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18
Q

If maintenance or repair is required, record all heat stress related deficiencies on the CSMP and TSIMS (CVNs only).

A

CHENG

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19
Q

Observing and recording temperatures of DB thermometers at specified watch or workstations.

A

Heat Stress Monitoring and Surveying

20
Q

where must a HDB being placed?

A

must be permanently mounted at watch and workstations throughout the ship where heat stress conditions may exist

21
Q

Evaluation and designation of potential heat stress areas is determined by

A

IH survey

22
Q

Placement of the DB thermometers may be in or out of the ventilation air stream but must be

A

hung at least 2 feet from any supply ventilation terminal or opening

23
Q

Thermometers must be hung with a

A

non-heat conducting material such as plastic tie-wrap or string (never hang with metal wire)

24
Q

If the difference between the hanging DB thermometer and the DB temperature measured with the WBGT meter, during a survey, is 5 degrees Fahrenheit or greater at any watch or workstation, then the DB thermometer is

A

is not representative of the temperature at the workstation.

25
Q

DB thermometers do not require calibration, so, if found inaccurate, the hanging DB must be

A

replaced or validated by aligning the etch mark with the freezing point (32 degrees Fahrenheit).

26
Q

what spaces must HDB hung?

A 
main machinery spaces
auxiliary machinery spaces 
emergency diesel spaces
other engineering spaces containing heat sources laundries (not required for self-help laundries), sculleries
galleys
bake shops 
steam catapult spaces.
27
Q

additionally where are HDB are hung not is not routinely required?

A
  • must be temporarily mounted to monitor conditions where repairs or maintenance are being performed in a heat stress area.
  • mounted in non-air conditioned spaces, not normally manned, in which personnel may have to periodically work or conduct maintenance, such as storerooms.
28
Q

where is an AHSS placed?

A

The AHSS units must be mounted in a position so they indicate the most accurate representative temperature for the area where workers and watchstanders spend the majority of their time.

29
Q

The critical factor is that the AHSS unit should be located in relation to the ventilation duct such that airflow across the sensors does not exceed

A

600 feet per minute (fpm).

30
Q

The AHSS unit is to be positioned vertically with the sensors at the top of the unit and with a minimum clearance of [ blank] above the sensors and a minimum clearance of [blank] on the right side of the AHSS unit.

A
  1. 4 inches

2. 6 inches

31
Q

Calibration is not required for the AHSS but the sensors must be validated, how often, by ships force as required by the equipment MRC.

A

quarterly

32
Q

a space is manned every _____ hours if DB temperatures do not exceed 85 degrees Fahrenheit.

A

4

33
Q

a space is manned every _____ hours if DB temperatures exceed 85 degrees Fahrenheit.

A

Every hour

34
Q

at temporary installations where the DB temperature exceeds 85 degrees Fahrenheit during repair or maintenance operations.

A

Every hour

35
Q

temperature logs are kept for how long?

A

1 year

36
Q

The effective operating range for the RSS-220 and Questemp 48N WBGT meters and the AHSS is

A

65 to 150 degrees Fahrenheit

37
Q

The relative humidity (RH) range for the AHSS is

A

10 percent to 95 percent.

38
Q

When surveying a work or watch station using the WBGT meter, the surveyor must position

A

the meter where the worker or watchstander would normally stand or where the intended work is to be performed, with ventilation arranged to provide normal ventilation at that location

39
Q

The heat stress surveyor must conduct the first WBGT measurement in the workspace after the meter has been in the space for

A

10 minutes to enable it to equilibrate to the surrounding area.

40
Q

As the meter is moved from one site to another, the meter should be at each site for

A

5 minutes to allow for stabilization of the first reading DB in the series to be taken.

41
Q

To determine when each sensor has stabilized, the surveyor should watch the

A

0.1 degree Fahrenheit digit of the display. When the 0.1 degree Fahrenheit digit stops changing or when it oscillates between a larger or smaller value, the sensor has stabilized and the value can be recorded

42
Q

Heat Stress Monitoring Sheet ( form number)

A

OPNAV 5100/17

43
Q

Upon completion of the survey and determination of PHEL stay times, the heat stress surveyor must note

A

any stay times for manned watch or workstations that, under routine conditions, are less than the watch or work period. The surveyor must circle these readings on the sheet in red.

44
Q

The surveyor must record the following heat stress information on the heat stress survey sheet manual or computer printout.

A
  1. Date and time of survey.
  2. In the follow-on survey block, identify a time and temperature.
  3. Stations surveyed
    - a. Time WBGT measurement was taken at the location.
    - b. Hanging DB temperature. Not required for the automated system.
    - c. WBGT meter readings for DB, WB, GT, and WBGT.
    - d. PHEL curve for the station and the corresponding exposure time.
45
Q

The heat stress surveyor must check to ensure that the

A

WB < DB; GT . DB; and WB < WBGT < GT

PMT (2 decks)

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