OPNAVINST 5100.19E B2 - Heat Stress

Question 1

What device provides values that provide values representing radiant and convection heat transfers to or from the body?

Answer 1

Globe thermometer

Question 2

What are the three temperature readings needed to obtain accurate and reliable date on heat stress conditions?

Answer 2

Dry-bulb (DB)
Wet-bulb (WB)
Globe temperature (GT)

Question 3

What does the navy use to measure dry bulb, wet-bulb, and globe temperatures?

Answer 3

WBGT meter or the automated heat stress system (AHSS)

Question 4

What does the acronym PHEL stand for?

Answer 4

Physiological Heat Exposure Limits

Question 5

What two things are used to determine how long an individual may be exposed safely to heat stress conditions/PHEL?

Answer 5

WBGT index and physical exertion level

Question 6

How many WBGT meters must be on-board a ship that is without an automated heat stress system (AHSS)?

Answer 6

two

Question 7

How many WBGT meters must be on-board a ship with an automated heat stress system(AHSS)?

Answer 7

one

Question 8

What formula is used to validate WBGT index readings?

Answer 8

WBGT = (1.0 x DB) + (0.7 x WB) + (0.2 x GT)

Question 9

At least how many feet must DB thermometers be hung from ventilation openings?

Answer 9

two feet

Question 10

A temperature difference of how many degrees between the DB reading of the WBGT meter and the hanging DB thermometer indicates that the hanging DB is not representative of the temperature in the workstation?

Answer 10

five degrees or greater

Question 11

At what temperature do dry-bulb thermometers need to be monitored every hour?

Answer 11

above 85 degrees

Question 12

At what temperature do dry-bulb thermometers need to be monitored every four hours?

Answer 12

85 degrees and below

Question 13

When do dry bulb temperatures need to be circled in red on the temperature recording log?

Answer 13

exceeds 100 degrees - 4 hours or less
exceeds 90 degrees - more than 4 hours
exceeds 85 degrees in scullery

Question 14

How long must the WBGT meter be in the work-space prior to conducting the first measurement?

Answer 14

five minutes

Question 15

After the first reading with the WBGT meter, if it is moved, how long must the surveyor wait before conducting a measurement?

Answer 15

three minutes

Question 16

The manual calculation of the WBGT index needs to be within how many degrees of the WBGT meter/AHSS findings?

Answer 16

0.2 degrees

Question 17

In a work station with a stay time of 4 hours or less and a PHEL I-III, what DB reading requires a heat survey?

Answer 17

100 degrees or above

Question 18

In a work station with a stay time greater than 4 hours and a PHEL I-III, what DB reading requires a Heat Survey?

Answer 18

90 degrees or above

Question 19

At what DB reading is a heat survey required in a watch/work station with a PHEL of IV - VI?

Answer 19

85 degrees and above

Question 20

What should the DB temperature of the space being used for recovery for personnel who have reached their heat exposure limit?

Answer 20

80 degrees or less

Question 21

What should the length of recovery time be for personnel that have reach their heat exposure limit?

Answer 21

equal to twice the exposure time or four hours, whichever is less

Question 22

Where are heat related injuries reported by the MDR?

Answer 22

Web-enabled safety system (WESS)

Question 23

How many PHEL curves are there?

Answer 23

six

Question 24

What percentage of cotton fiber should the clothing of personnel working in heat stress environments contain?

Answer 24

35 percent