Opnavinst 5100.19

Front 1

True or False.
Ships use dry bulb, wet-bulb, and
globe temperature readings to calculate a single number, the WBGT index. They use the WBGT index, along with the individual’s physical exertion level to calculate an individual’s permissible heat exposure limit.

Back 1

True

Front 2

To obtain accurate and reliable data on heat-stress conditions, ships shall conduct heat-stress surveys to record dry-bulb (DB), wet-bulb (WB), and globe temperature (GT) readings.

Back 2

They must take DB and WB temperature with both thermometers shielded from radiant heat and the WB must also be properly ventilated to determine the effects of airflow. Measurement is accomplished by means of a globe thermometer that provides a value representing radiant and convection heat transfers to or from the body. The Navy uses either a wetbulb-
globe temperature (WBGT) meter or an automated heat stress system (AHSS)

Front 3

What is heat acclimatization?

Back 3

Appropriate repeated exposure
to heat stress causes a series of physiologic adaptations called acclimatization, whereby the body becomes more efficient in coping with the heat stress.

Front 4

Personnel acquire heat acclimatization
only gradually, being fully achieved over a __ to___ week level of sustained
physical activity.

Back 4

3 to 4

Front 5

The commanding officer shall

Back 5

Establish and enforce an effective heat-stress policy that ensures
personnel heat exposures are limited per this chapter except in an operational emergency.

Front 6

The medical department representative (MDR) shall

Back 6

If an Automated Heat Stress System (AHSS) is installed, maintain and calibrate at least one portable WBGT meter in the event that the automated system should fail. For submarines, the MDR conducts heat-stress surveys in engineering spaces.

Front 7

Use of a WBGT meter or AHSS to measure DB, WB, and GT, and compute the WBGT index to determine the amount of time it is safe to work in a given space. Personnel conducting a survey can validate the WBGT index
using the following formula:

Back 7

WBGT = (0.1 x DB) + (0.7 x WB) + (0.2 x GT).

Front 8

A hanging DB thermometer shall be permanently mounted at:

Back 8

watch and workstations throughout the ship where heat-stress conditions may exist. A DB thermometer shall also be mounted in non-air conditioned spaces, not normally manned, in which personnel may have to periodically work or conduct
maintenance, such as storerooms.

Front 9

Placement
of the DB thermometers may be in or out of the ventilation air stream but must be hung at least ____ feet from any supply ventilation terminal/opening.

Back 9

2 feet

Front 10

True or false. If the difference between the hanging DB thermometer and the DB temperature measured with the WBGT meter, during a survey, is 5°F or greater at any watch or workstation, then the DB thermometer is not representative
of the temperature at the workstation.

Back 10

True

Front 11

True or False. “No Calibration Required” (NCR) stickers are not required to be placed
on DB thermometers.

Back 11

True

Front 12

Assigned personnel shall monitor
compartments as followsfor Dry-Bulb Temperature Recordings:

Back 12

(a) Every 4 hours for manned spaces if DB temperatures do not exceed 85F
(b) Every hour for manned spaces if DB temperatures exceed 85F
(c) Every hour at temporary installations where the DB temperature exceeds 85F during repair or maintenance operations.

Front 13

If a DB temperature exceeds the temperature, the space supervisor shall _______ the DB reading and immediately notify the watch supervisor (i.e. engineering officer of-the-watch (EOOW), division officer, etc).

Back 13

circle (in red)

Front 14

The heat-stress surveyor shall record all non-automated survey
readings to the nearest _____ on a Heat-Stress Survey Sheet

Back 14

0.1°F

Front 15

PHEL

Back 15

Physiological Heat Exposure Limit

Front 16

If the result of the evaluation indicates a heatrelated case the MDR shall prepare a Heat/Cold Case form _______

Back 16

(NAVMED 6500/1).

Front 17

If a heat-stress case results in 5 or more lost workdays, a ___________
shall be submitted per chapter A-6 in addition to the submission
of the Heat/Cold Case form.

Back 17

Mishap Report

Front 18

True or false. Noise-induced hearing loss is the Fleet’s number one occupational health hazard.

Back 18

True

Front 19

The analysis of noise measurements to assess the hazard potential is a complex task that shall be performed by an

Back 19

industrial hygienist or occupational
audiologist.

Front 20

Designated hazardous noise areas and equipment that produce hazardous
sound levels shall be appropriately labeled

Back 20

NAVMED 6260/2, Hazardous Noise Warning Decal (8" x 10")
and the NAVMED 6260/2A, Hazardous Noise Labels (2" x 2")
or their equivalents, are approved for marking hazardous noise areas and equipment.

Front 21

A combination of insert type and circumaural (muff) type hearing protective devices (double protection) shall be worn

Back 21

In all areas where sound levels exceed 104 dB(A)

Front 22

The MDR shall maintain a current roster of personnel who routinely
work in designated noise hazardous areas and shall update this roster semiannually.

Back 22

The MDR shall maintain a "tickler file" for scheduling annual audiometric examinations of these personnel. The MDR shall update the "tickler file" monthly with the results of the audiometric exams.

Front 23

Navy Occupational Exposure Level (NOEL).

Back 23

a. For an 8-hour time-weighted average (TWA) in any 24-hour period: 84 dB(A)
b. For periods of less than 16 hours in any 24-hour period, the NOEL can be determined from the following equation:
T = 16/2 [(L - 80)/4]
Where: T = time in hours (decimal)
L = effective sound level in dB(A)

Front 24

Before reissue, non-corrective eye protection shall be sanitized with hot, soapy water and rinsed of all traces of soap or detergent.

Back 24

Eye protection equipment should then be immersed for 10 minutes in a disinfectant, rinsed, and airdried.

Front 25

Approved emergency eyewash
equipment shall be capable of flushing the eyes with potable water at a
minimum flow rate of 0.4 gallons per minute for ____ continuous minutes.

Back 25

15

Front 26

Clearly mark eyewash stations with a green sign with white lettering
stating ________

Back 26

“EMERGENCY EYEWASH STATION”