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BOSH > Pressure Hazard > Flashcards

Pressure Hazard Flashcards

1
Q

in physics as the force exerted against an opposing fluid or thrust distributed over a surface

A

Pressure

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2
Q

may be
expressed in force or weight per unit of area,

A

Pressure per square inch

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3
Q

condition with the
potential of causing injury to personnel,
damage to equipment or structures, loss of
material, or lessening of the ability to perform
a prescribed function

A

Hazard

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4
Q

a hazard
caused by a dangerous condition involving
pressure

A

Pressure hazard

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5
Q

Sources of pressure hazards

A

Natural
Created by humans

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6
Q

can result from
the decompression that accompanies a rapid rise
from sea level to at least 5,486 meters (18,000
feet) or a rapid ascent from around 40 to 20
meters (132 to 66 feet) underwater

A

Decompression sickness

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7
Q

A _______ of previous decompression
sickness increases the probability of another
attack.

A

History

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8
Q

______ is a component. Being over 30
increases the chances of an attack.

A

Age

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9
Q

______________ plays a role. People in better
condition have a reduced chance of getting
sickness. Previously broken bones and joint
injuries are often the sites of pain.

A

Physical fitness

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10
Q

________ during
the
exposure
to
decompression increases the likelihood and
brings on an earlier onset of symptoms.

A

Exercise

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11
Q

increases the probability of
sickness

A

Low temperature

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12
Q

___________ also influences the
sickness. A rapid rate of decompression
increases the possibility and severity of
symptoms.

A

Speed of decompression

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13
Q

reduction in partial pressure can
result from reduced available oxygen and cause
a problem in breathing

A

Hypoxia

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14
Q

Too much oxygen or oxygen
breathed under pressure that is too high

A

Hyperoxia

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15
Q

results from a higher-thannormal level of nitrogen pressure.

A

Nitrogen narcosis

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16
Q

closed vessel in which
water is heated to form steam, hot water, or
high-temperature
water
under
pressure

A

Boiler

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17
Q

Check the water to
make sure that it is at the proper level

A

Daily check

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18
Q

test the low-water automatic shutdown
control and record the results of the test on a
tag that is clearly visible.

A

Weekly check

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19
Q

test the safety valve and record the
results of the test on a tag that is clearly visible.

A

Monthly check

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20
Q

The low-level
automatic shutdown control mechanism should be either replaced or completely overhauled
and rebuilt

A

Yearly check

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21
Q

water that has
been heated to a very high temperature, but
not high enough to produce steam.

A

High-Temperature Water (HTW)

22
Q

can be used as an economical
substitute for steam

A

HTW

23
Q

The two most prominent sources
of hazards associated with HTW are

A

Operator error
Improper design

24
Q

The most effective preventive measure
for overcoming these potential hazards of unfired pressure vessel is

A

Proper design

25
Q

One of the most serious hazards in
pressure vessels is the

A

Potential for cracking

26
Q

used in many
different applications to contain many different
types of substances ranging from water to
extremely toxic chemicals

A

Pressure vessels

27
Q

rare case of a
total lack of oxygen

A

Anoxia

28
Q

when the available oxygen is reduced,
can occur while ascending to a high altitude or
when oxygen in air has been replaced with
another gas

A

Hypoxia

29
Q

form of hypoxia
associated with high altitudes

A

Altitude sickness

30
Q

increased
concentration of oxygen in air

A

Hyperoxia

31
Q

include air pockets in the ears, sinuses, and
chest.

A

Trapped gas

32
Q

Divers refer to the trapped gas
phenomenon as the

A

Squeeze

33
Q

can be caused by a swift
return to the surface from diving or
decompression during high-altitude flight. This
event is rare and happens only if the person is
holding his or her breath during the
decompression

A

Lung rupture

34
Q

associated with
the absorption of nitrogen into body tissues

A

Evolved gas effects

35
Q

If the nitrogen in body tissues such as
blood is being absorbed faster than it is being
exhaled, _________ of gas may form in the blood
and other tissues.

A

Bubbles

36
Q

The common name for decompression sickness

A

Bends

37
Q

When the formation of gas bubbles is
due to rapid ambient pressure reduction, it is
called

A

Dysbarism

38
Q

most often associated with
underwater diving or working in pressurized
containers (such as airplanes).

A

Dysbarism

39
Q

Coughing
and choking, resulting from bubbles in the
respiratory system, are called the

A

Chokes

40
Q

delayed
effect of decompression sickness. Blood in the
capillaries supplying the bone marrow may
become blocked with gas bubbles, which can
cause a collection of platelets and blood cells to
build up in a bone cavity

A

Aseptic necrosis of bone

41
Q

There are several methods of detecting
pressure hazards:

A

Sounds
Cloth steamer
Scent
Leak detector
Corrosion

42
Q

can be used to signal a
pressurized gas leak. Gas discharge may be
indicated by a whistling noise, particularly with
highly pressurized gases escaping through small
openings.

A

Sounds

43
Q

may be tied to the
gas vessel to help indicate leaks. Soap solutions
may be smeared over the vessel surface so that
bubbles are formed when gas escapes.

A

Cloth steamers

44
Q

may be added to gases that
do not naturally have an odor

A

Scents

45
Q

measure pressure,
current flow, or radioactivity may be useful for
some types of gases

A

Leak detectors

46
Q

may be the long-term
effect of escaping gases.

A

Corrosion

47
Q

used to detect pressure leaks and
incorrect pressure levels.

A

Destructive and nondestructive testing

48
Q

do not harm the material being tested.
may include mixing
dye penetrants and magnetic or radioactive
particles with the gas and then measuring the
flow of the gas.

A

Nondestructive testing

49
Q

methods destroy the
material being
checked.

A

Destructive testing

50
Q

often call for the
pressure to be applied for a specified time and
then to be released.

A

Proof pressure tests

BOSH (6 decks)

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