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Gas Physics

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Quiz on Untitled, created by Ve'Laura Bradshaw on 06/27/2018.
Ve'Laura Bradshaw
Quiz por Ve'Laura Bradshaw, atualizado more than 1 year ago
Ve'Laura Bradshaw
Criado por Ve'Laura Bradshaw mais de 6 anos atrás
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Resumo de Recurso

Questão 1

Questão
Underwater objects appear larger and closer
Responda
  • True
  • False

Questão 2

Questão
How much faster does sound travel and water as compared to its speed and air.
Responda
  • 100
  • 50
  • 4
  • 10

Questão 3

Questão
FSW to ATA. [blank_start]FSW / 33[blank_end]. [blank_start]+ 1[blank_end]
Responda
  • FSW / 33
  • FSW • 33
  • FSW + 14.7
  • FSW. • .445
  • + 1
  • -1
  • none

Questão 4

Questão
What are the units of measure used in diving to express pressure
Responda
  • PSIG PSIA. ATA ATM FSW
  • USAF CIA FBI ATT MMA LDS

Questão 5

Questão
What concentration of oxygen is required or necessary to support life
Responda
  • 16
  • 5

Questão 6

Questão
A cubic foot of Sea water weighs 62.4 pounds
Responda
  • True
  • False

Questão 7

Questão
The most common pollutant found in air.
Responda
  • Carbon monoxide
  • Carbon dioxide

Questão 8

Questão
What are three Interrelated factors that affect a divers breathing gas
Responda
  • Temperature
  • Pressure
  • Volume
  • Defusion
  • Re-fraction

Questão 9

Questão
What are the two factors affecting the amount of pressure acting on a diver
Responda
  • Weight of water weight of Atmosphere
  • Weight of suit
  • Weight of the world
  • Weight of last meal

Questão 10

Questão
What three laws represent components of the general gas law
Responda
  • Fisk law
  • Henry’s law
  • Boyles law
  • Charles and gay Loussac’s law

Questão 11

Questão
What is the mathematical expression of a general gas law
Image:
Mobile upload (image/jpeg)
Responda
  • correct
  • correct again

Questão 12

Questão
Boyles law defines the interrelationship of a gas at a constant temperature where is the volume inversely relates to pressure
Responda
  • True
  • False

Questão 13

Questão
Internal pressure affects the volume in Boyles law.
Responda
  • True
  • False

Questão 14

Questão
What diving related injury can be explained by Boyles law
Responda
  • POIS
  • PAWS
  • Squeezes

Questão 15

Questão
Any gas at a constant pressure the volume will very proportionally with the temperature as described in Henry’s law
Responda
  • True
  • False

Questão 16

Questão
What formula is used to represent Charles law
Responda
  • V2= V1•T2/T1
  • V1/T1 = V2/T2
  • V2/T1=V1/T2
  • V1= V2•T1/T1

Questão 17

Questão
Gay Loussac law expresses the relationship between what two properties of diving gases? Any gas at a constant volume the [blank_start]pressure[blank_end] very proportionately with the absolute [blank_start]temperature.[blank_end]
Responda
  • pressure
  • temperature.

Questão 18

Questão
Convert Fahrenheit to Celsius F=[blank_start]C[blank_end]• [blank_start]9[blank_end]÷[blank_start]5[blank_end]+[blank_start]32[blank_end]
Responda
  • 32
  • 5
  • 9
  • C

Questão 19

Questão
What concentration of oxygen is required to support combustion
Responda
  • 12
  • 16

Questão 20

Questão
Check
Image:
Mobile upload (image/jpeg)
Responda
  • ATA
  • ATM
  • FSW
  • FFW
  • MSW
  • ATM
  • ATA
  • PSIG
  • PSIA
  • PSIA
  • PSIG
  • /33
  • x 33
  • x 33
  • / 33

Questão 21

Questão
Convert Celsius to Fahrenheit. C = [blank_start]5[blank_end] ( [blank_start]F[blank_end] - [blank_start]32[blank_end] ) / [blank_start]9[blank_end]
Responda
  • 5
  • F
  • 32
  • 9

Questão 22

Questão
Using Charles law what happens to a flexible balloon if we double the absolute temperature of the air inside? If the [blank_start]pressure[blank_end] is [blank_start]constant[blank_end] and [blank_start]absolute[blank_end] [blank_start]temperature[blank_end] is [blank_start]doubled[blank_end] the [blank_start]volume[blank_end] will [blank_start]doubled[blank_end].
Responda
  • pressure
  • constant
  • absolute
  • temperature
  • doubled
  • volume
  • doubled

Questão 23

Questão
What is the formula used to represent Gay-Lussac’s Law. P2 = P1 • [blank_start]T2[blank_end] / [blank_start]T1 [blank_end]
Responda
  • T2
  • T1

Questão 24

Questão
PSIG to ATA= [blank_start]PSIG. +14.7[blank_end] [blank_start]/14.7[blank_end]
Responda
  • /14.7
  • •14.7
  • PSIG. +14.7
  • PSIG. -14.7

Questão 25

Questão
It is easier for divers to determine the direction to a sound source under water.
Responda
  • True
  • False

Questão 26

Questão
PSIG to ATA= [blank_start]PSIG. +14.7[blank_end] [blank_start]/14.7[blank_end]
Responda
  • PSIG. +14.7
  • PSIG. -14.7
  • /14.7
  • •14.7

Questão 27

Questão
ATA to FSW. [blank_start]ATA -1[blank_end]. [blank_start]•33[blank_end]
Responda
  • ATA -1
  • ATA + 1
  • •33
  • /33
  • /14.7

Questão 28

Questão
PSIG to ATA= [blank_start]PSIG. +14.7[blank_end] [blank_start]/14.7[blank_end]
Responda
  • /14.7
  • •14.7
  • PSIG. +14.7
  • PSIG. -14.7

Questão 29

Questão
PSIG to ATA= [blank_start]PSIG. +14.7[blank_end] [blank_start]/14.7[blank_end]
Responda
  • /14.7
  • •14.7
  • PSIG. +14.7
  • PSIG. -14.7

Questão 30

Questão
PSIG to ATM PSIG. [blank_start]/14.7[blank_end]
Responda
  • /14.7
  • • 14.7
  • •33

Questão 31

Questão
Archimedes principle deals with the concept of
Responda
  • Pressure
  • Volume
  • Buoyancy
  • Temperature

Questão 32

Questão
And object will displace a amount of fluid equal to the volume of fluid required to completely fill or flood that object floatable volume.
Responda
  • True
  • False

Questão 33

Questão
MMP stands for minimum manifold pressure.
Responda
  • True
  • False

Questão 34

Questão
ATM to ATA [blank_start]+1[blank_end]
Responda
  • +1
  • -1

Questão 35

Questão
Applying the principles of Henry’s law what is the primary factor that directly influences how much of breathing gas components gets absorbed by the divers body tissues.
Responda
  • Partial pressure of an inert gas in breathing media
  • The water temperature

Questão 36

Questão
What is the formula we used for Henry’s law calculations. [blank_start]None[blank_end]
Responda
  • None

Questão 37

Questão
[blank_start]Red[blank_end] is the first color to be filtered out in water and [blank_start]blue[blank_end] penetrates the deepest.
Responda
  • Red
  • blue

Questão 38

Questão
What changes in a diverse environment will trigger a change and gases absorbed in her body tissues.
Responda
  • Depth and pressure
  • What they guy across the street thinks about politics and women.
  • The weather outside
  • Changes in the amount of inert gas in the breathing media

Questão 39

Questão
If a diver on the surface is breathing a mixture of 80% helium and 20% oxygen what happens to her body. Is the N2 replaced by the He she’s breathing?
Responda
  • True
  • False

Questão 40

Questão
Name two ways a diver can change her buoyancy.
Responda
  • Add weight
  • Add volume
  • Skip breakfast
  • Drink five sodas.

Questão 41

Questão
Boyle’s law (pressure/ volume) plays a major factor in the measurement of adequate gas and volume supplies provided from the surface to the diver
Responda
  • True
  • False

Questão 42

Questão
Defending an open circuit man type or free flow helmet or mask requires increasing pressure supplied to the umbilical to the units for proper function At depth.
Responda
  • True
  • False

Questão 43

Questão
The minimum operating pressure these regulators are sent to is called the over bottom pressure. The [blank_start]OBP[blank_end] required varies with depth.
Responda
  • OBP
  • EGS
  • MMP

Questão 44

Questão
An object will displace an amount of fluid equal to the volume of fluid required to completely fill ( flood) that object. Floodable volume
Responda
  • True
  • False

Questão 45

Questão
If the weight of a body is equal to that of the displaced liquid, the buoyancy is [blank_start]neutral[blank_end].
Responda
  • neutral
  • positive
  • negative

Questão 46

Questão
Underwater objects appear larger and closer.
Responda
  • True
  • False

Questão 47

Questão
The visual distortion that is due to the bending of light energy is known as [blank_start]refraction[blank_end].
Responda
  • refraction
  • Defraction
  • Hue
  • reflection

Questão 48

Questão
Sound travels [blank_start]four[blank_end] times faster in water as compared to its speed in air.
Responda
  • four
  • five
  • equally

Questão 49

Questão
An object will displace an amount place of fluid equal to the volume of fluid required to completely fill (flood)that object.
Responda
  • True
  • False

Questão 50

Questão
When the water temperate reaches 70 degrees Fahrenheit, the ambient temperature surrounding the diver are to cold for the body to generate enough heat to compensate.
Responda
  • True
  • False

Questão 51

Questão
At what temperature is a dry suit recommended over a wetsuit?
Responda
  • 60
  • 70

Questão 52

Questão
At what temperature it is a hot water suit recommended over a dry suit or a wetsuit?
Responda
  • 40
  • 30

Questão 53

Questão
What are the two data plate specifications that determine the usable air output of an LP compressor?
Responda
  • Max pressure
  • Input volume

Questão 54

Questão
The volume of breathing media in storage and the adequacy of breathing media in diving system must be able to support the following:
Responda
  • The pressure requirement to maintain external work load and supply structural equipment with back up system.
  • Conservative and minimal fuel requirements not to exceed more than 55 gallons of Diesel fuel for a 72 hour operation.
  • Need the consumption rate for the full duration of the plan dive including max depth bottom time decompression and designated number of divers including standby divers.
  • Air or gas flow and pressure requirements for the designated equipment during heavy and emergency flow requirements no cubic feet per minute and psi and calculations.

Questão 55

Questão
Boyles law applies most directly to the discussion of a divers air supply requirements.
Responda
  • True
  • False

Questão 56

Questão
What is the unit used to express the output of an LP air compressor.
Responda
  • ACFM
  • SCFM
  • MMP

Questão 57

Questão
What does the number 18 represent on a data plate as an LP air compressor which reads 18 CFM @ 100 PSIG?
Responda
  • Volume and take that passes through the inlet
  • Gallons of fuel required

Questão 58

Questão
In any LP diving system the compressor is always the component that determines how much breathing media it is possible to deliver to the diver
Responda
  • True
  • False

Questão 59

Questão
As a diver descendants will the SCF required to support him to go up or down.
Responda
  • Down
  • Up

Questão 60

Questão
What is the SCFM requirement for a driver to work at 99FSW using a helmet that requires 1.480 CFM of air.
Responda
  • 6×4.5×2 = 54
  • 4×1.4×1 = 5.6

Questão 61

Questão
How much air in SCFM does a compressor have to provide to support diving operations for two diapers working in 165FSW assume that the equipment being used is free flow hats .
Responda
  • 6×4.5×2 = 54
  • 4×1.4×1 = 5.6

Questão 62

Questão
How many SCF of air will a diver use in 21 minutes wearing a super light 17 in demand mode and working and 132 feet of seawater?
Responda
  • SCF equals ATAx ACFMx Nx T= 5×1.4×1×21 = 147 SCF
  • SCF equals ATAx ACFMx Nx T=. 6×4.5×2 = 54

Questão 63

Questão
Name two connections that each diver umbilical will have in amanifold box.
Responda
  • Communication box, pnneumofathometer, main and secondary air.
  • EGS, regulator, bailout bottle.

Questão 64

Questão
What is the minimum number of connections in a manifold console rack box for air supply air coming into the box from sources like compressors or banks.
Responda
  • Two- primary and backup
  • One main intake
  • Main back up and power line

Questão 65

Questão
Does MMP change if you increase the number of divers supplied from a manifold box.
Responda
  • Yes, Each diver pulls pressure from the system while using up the volume.
  • No, The more the number of divers the more volume is needed not pressure.

Questão 66

Questão
What is the formula for computing stowage/ total volume of air in a storage bank
Responda
  • PSI +14.7÷14.7x V x N
  • psi-MMP/14.7 x V x N

Questão 67

Questão
What is the formula for computing the available volume of air in a flask cylinder.
Responda
  • Psi+ 14.7/14.4xVxN
  • PSI- MMP/14.7xVxN

Questão 68

Questão
When computing available volume of air in a flask we do not use absolute pressure.
Responda
  • True
  • False

Questão 69

Questão
When computing stowage and total volume of air in a flask cylinder we do not use absolute pressure’s.
Responda
  • True
  • False

Questão 70

Questão
Of the following components of air are we most concerned with when discussing decompression?
Responda
  • N2
  • CO2
  • CO

Questão 71

Questão
What is the rate of a sent from the bottom to the first in water decompression stop?
Responda
  • 30ft/min
  • 40ft/min
  • 10ft/min

Questão 72

Questão
What two factors govern inert gas absorption and the selection of a decompression schedule.
Responda
  • Bottom time and depth
  • Weight and sobriety
  • Age and gender

Questão 73

Questão
What is the maximum descent rate?
Responda
  • 75ft/min
  • 55ft/min
  • 65ft/min

Questão 74

Questão
Define bottom time.
Responda
  • The time you spent on the bottom.
  • The time you leave the surface to the time you start to leave for the surface.
  • The time you leave the bottom till the time you reach the surface.

Questão 75

Questão
Decompression schedules are in 5/10 foot increments and 5/10 minute bottom time increments.
Responda
  • True
  • False

Questão 76

Questão
Air decompression tables combine three modes of decompression into one table: decompression on [blank_start]air[blank_end] and water decompression on [blank_start]air[blank_end] and [blank_start]oxygen[blank_end] and surface decompression on [blank_start]oxygen[blank_end].
Responda
  • air
  • air
  • oxygen
  • oxygen

Questão 77

Questão
What is the rate of ascent from the bottom to the first in water decompression stop?
Responda
  • 20ft/min
  • 30ft/min
  • 45ft/min

Questão 78

Questão
Using the air decompression tables when does a divers time at a stop begin.
Responda
  • You reach and leave your first stop only you leave all other stops and the start time starts when you leave.
  • When the total time elapses from when the driver left the surface to when they left bottom.

Questão 79

Questão
When you’re keeping record of a dive when does bottom time BT begin?
Responda
  • When the driver leaves the bottom
  • When the driver leaves the surface.
  • When the diver leaves their first decompression stop.

Questão 80

Questão
When does bottom time (BT) end.
Responda
  • When the diver leaves the surface.
  • When the diver leaves their first decompression stop.
  • When the diver leaves bottom.

Questão 81

Questão
Deepest depth of dive is defined as the deepest depth the diver obtained.
Responda
  • True
  • False

Questão 82

Questão
What is meant by the term maximum depth ?
Responda
  • Deepest depth of dive plus Pneumo correction factor.
  • Gas consumption calculations beyond 4.5 ACFM.

Questão 83

Questão
Total DECO time.
Responda
  • TDT
  • TTD
  • DDT

Questão 84

Questão
Left surface
Responda
  • LS
  • LB

Questão 85

Questão
TBT
Responda
  • Total time dive
  • Total deco time
  • Total bottom time

Questão 86

Questão
RNT
Responda
  • Residual nitrogen time
  • Reached bottom time
  • Reach surface time

Questão 87

Questão
What does the term surface interval?
Responda
  • The time between two dives. Think RNT designator.
  • The time corresponding between two different diverse
  • The depth difference between the two divers.

Questão 88

Questão
As the diver decisions and salt water how does this affect the nitrogen and her body?
Responda
  • Her equilibrium.
  • Her heart rate.
  • Her on gassing.

Questão 89

Questão
[blank_start]30 ft./m[blank_end] is the rate of ascent from the bottom to the first in water decompression stop.
Responda
  • 30 ft./m
  • 40 ft./m
  • 25 ft./m

Questão 90

Questão
Using the air decompression tables when does a diverse time at stop and.
Responda
  • When the Diver leaves the bottom heading towards the decompression stop
  • When the diver actually leaves the decompression stop
  • The time between the first decompression stop to the surface.

Questão 91

Questão
What is the deepest depth and maximum time for air decompression?
Responda
  • 500/10
  • 300/25
  • 250/30

Questão 92

Questão
30 ft./m using the decompression tables is the rate of travel between stops.
Responda
  • True
  • False

Questão 93

Questão
A repetitive dive is any dive I’ve conducted less than 10 minutes (SI). This is where the diver still has residual nitrogen in her tissue from the prior dive.
Responda
  • True
  • False

Questão 94

Questão
.The time given at the intersection of the RNT timetable (new designation) for repetitive air dives is the RN (residual nitrogen) time/number that needs to be added to the repet dive time on the no-deco dive table along with the new planned time.
Responda
  • True
  • False

Questão 95

Questão
At 60/39 what is the REPET group?
Image:
Mobile upload (image/jpeg)
Responda
  • G
  • K

Questão 96

Questão
G Repet designation for 60 FSW with a SI of 3:31, what is the new Repet designation and time to be added?
Image:
Mobile upload (image/jpeg)
Responda
  • C:19

Questão 97

Questão
There is concern of fire/combustion when divers are breathing oxygen at an increased partial pressure in Deco Chambers.
Responda
  • True
  • False

Questão 98

Questão
Decompression time for a no decompression dive can be defined as left bottom to reach surface.
Responda
  • True
  • False

Questão 99

Questão
Maximum descent rate in the water column is 75 ft./m
Responda
  • True
  • False

Questão 100

Questão
Maximum ascent rate in the water column is 30ft/m which is actually between 40 ft/m and 20 ft/m.
Responda
  • True
  • False

Questão 101

Questão
What is the rate of ascent from the bottom to the first in water decompression stop?
Responda
  • 40
  • 30
  • 50

Questão 102

Questão
Using the air decompression tables when does a diverse time at the first in water stop begin.
Responda
  • You reach and leave your first stop.
  • You leave all other stops and the start time starts when you leave.
  • When you reach the surface.

Questão 103

Questão
Using the air decompression tables when does a diverse time at other in water stops begin.
Responda
  • That time when the diver actually leaves the stop
  • When the diver reach surface.

Questão 104

Questão
The max depth and Max time for air decompression is 300/25
Responda
  • True
  • False

Questão 105

Questão
Using the air decompression tables what is the rate of travel between stops.
Responda
  • 30 ft./m
  • 20 ft./m
  • 100 ft./m

Questão 106

Questão
In the air decompression tables travel time between stops is included in any of the decompression stop time.
Responda
  • True
  • False

Questão 107

Questão
Using and water air decompression how long does it take from leaving the last stop in the water to reach the surface.
Responda
  • 40 seconds, at least record it as one minute.
  • 15 seconds
  • Two minutes

Questão 108

Questão
Decompression stops on oxygen commence at what depths?
Responda
  • 30 and 20 FSW
  • Bottom to midway

Questão 109

Questão
What is the maximum time is to take to travel Shift to O2 and ventilate all divers?
Responda
  • Three minutes
  • Two minutes
  • Five minutes

Questão 110

Questão
30 minutes to breathe 02 with a five minute air brake max is the amount of minutes a diver can continuously breath 02 without an air break at the 30 and 20 FSW stops.
Responda
  • True
  • False

Questão 111

Questão
Airbrakes count towards the required decompression time.
Responda
  • No
  • Yes

Questão 112

Questão
Is an air break required if the total oxygen stop time is 35 minutes or less?
Responda
  • No an air brake is not required at the 30 minute mark
  • Yes an air brake is required at the 30 minute mark

Questão 113

Questão
Is an air Brake required at the 30 minute mark if the final 02 period is 35 or less?
Responda
  • No
  • Yes

Questão 114

Questão
After completion of the O2 time the driver is serviced breathing [blank_start]02[blank_end].
Responda
  • 02

Questão 115

Questão
And water decompression on air and oxygen is strongly recommended whenever the total decompression time in air exceeds [blank_start]15[blank_end] minutes and service decompression on oxygen is not a viable alternative.
Responda
  • 15
  • 20

Questão 116

Questão
Oxygen toxicity is a concern when a diaper is breathing oxygen at an increased partial pressure
Responda
  • True
  • False

Questão 117

Questão
If a water stop is required during a cent what is the rate of travel from the bottom to that water stop.
Responda
  • 30 FSW/min
  • 20 FSW/ min

Questão 118

Questão
If you use surface decompression and no and water stops are required what is the rate of travel from the bottom to the surface.
Responda
  • LB two RS at 40 feet of seawater at 30 feet of seawater per. minute
  • 100 feet of seawater per minute.

Questão 119

Questão
What is the maximum time it can take for the divergent go from the surface of the water RS to50 feet in the chamber. [blank_start]Four[blank_end] minutes
Responda
  • Four
  • five
  • six

Questão 120

Questão
Utilizing surface decompression were there also in water stops it should take a diver one minute to travel from the last water stop to reach the surface.
Responda
  • True
  • False

Questão 121

Questão
It should take a diver four minutes to get undressed into the chamber decompressed to 50 feet in the chamber and ready to go on O2 assuming the driver has completed all in water stops and has traveled from the last water stop to the surface in the prescribed amount of time.
Responda
  • True
  • False

Questão 122

Questão
Utilizing surface decompression where there are in water stops what is the total I’m allowed time for the driver to go from the last water step stop at 50 feet in the chamber and ready to go on O2.
Responda
  • Five minutes
  • Three minutes

Questão 123

Questão
100 ft./m is the maximum rate of travel from the surface to 50 feet of seawater for surface decompression to the chamber.
Responda
  • True
  • False

Questão 124

Questão
When does oxygen time at 50 FSW in the chamber begin and what is the minimum amount of time the diver will breath O2 at 50 at FSW?
Responda
  • When the driver is on 02. 15 minutes on 02 at 50 feet of seawater 15 minutes on 02 at40 feet of seawater.
  • When the diver reaches the surface

Questão 125

Questão
30 minutes for surface decompression is the maximum amount of time for a divers O2 breathing period.
Responda
  • True
  • False

Questão 126

Questão
In surface decompression, air brakes are included in the required decompression time .
Responda
  • True
  • False

Questão 127

Questão
After a diver completes his required a two-time what is the rate of travel from 50 40 and 30 feet in the chamber to the surface. [blank_start]30[blank_end].
Responda
  • 30
  • 40

Questão 128

Questão
A dive within a SI of >:10 is a repetitive dive.
Responda
  • True
  • False

Questão 129

Questão
If a diver has an SI of less than 10 minutes what is the RNT to be equal to?
Responda
  • A continuation of the dive it is the same dive
  • Total bottom time
  • total decompression time

Questão 130

Questão
What are the four pieces of information you need to determine a divers RNT on a repetitive dive.
Responda
  • Repair group from last dive
  • Time the diver reached bottom on last dive
  • Return to service from previous dive
  • Left service of previous dive
  • Left surface for current dive
  • Depth of last dive
  • Depth of current dive

Questão 131

Questão
Is it possible for a diver to have an RNT that is greater than the total bottom time of her previous dive?
Responda
  • No
  • Yes you won’t counted on the dive log

Questão 132

Questão
Speaker question and then give your answer
Responda
  • True
  • False

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