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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 by Ve'Laura Bradshaw, updated more than 1 year ago
Ve'Laura Bradshaw
Created by Ve'Laura Bradshaw over 6 years ago
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Resource summary

Question 1

Question
Underwater objects appear larger and closer
Answer
  • True
  • False

Question 2

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

Question 3

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

Question 4

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

Question 5

Question
What concentration of oxygen is required or necessary to support life
Answer
  • 16
  • 5

Question 6

Question
A cubic foot of Sea water weighs 62.4 pounds
Answer
  • True
  • False

Question 7

Question
The most common pollutant found in air.
Answer
  • Carbon monoxide
  • Carbon dioxide

Question 8

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

Question 9

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

Question 10

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

Question 11

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

Question 12

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

Question 13

Question
Internal pressure affects the volume in Boyles law.
Answer
  • True
  • False

Question 14

Question
What diving related injury can be explained by Boyles law
Answer
  • POIS
  • PAWS
  • Squeezes

Question 15

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

Question 16

Question
What formula is used to represent Charles law
Answer
  • V2= V1•T2/T1
  • V1/T1 = V2/T2
  • V2/T1=V1/T2
  • V1= V2•T1/T1

Question 17

Question
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]
Answer
  • pressure
  • temperature.

Question 18

Question
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]
Answer
  • 32
  • 5
  • 9
  • C

Question 19

Question
What concentration of oxygen is required to support combustion
Answer
  • 12
  • 16

Question 20

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

Question 21

Question
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]
Answer
  • 5
  • F
  • 32
  • 9

Question 22

Question
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].
Answer
  • pressure
  • constant
  • absolute
  • temperature
  • doubled
  • volume
  • doubled

Question 23

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

Question 24

Question
PSIG to ATA= [blank_start]PSIG. +14.7[blank_end] [blank_start]/14.7[blank_end]
Answer
  • /14.7
  • •14.7
  • PSIG. +14.7
  • PSIG. -14.7

Question 25

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

Question 26

Question
PSIG to ATA= [blank_start]PSIG. +14.7[blank_end] [blank_start]/14.7[blank_end]
Answer
  • PSIG. +14.7
  • PSIG. -14.7
  • /14.7
  • •14.7

Question 27

Question
ATA to FSW. [blank_start]ATA -1[blank_end]. [blank_start]•33[blank_end]
Answer
  • ATA -1
  • ATA + 1
  • •33
  • /33
  • /14.7

Question 28

Question
PSIG to ATA= [blank_start]PSIG. +14.7[blank_end] [blank_start]/14.7[blank_end]
Answer
  • /14.7
  • •14.7
  • PSIG. +14.7
  • PSIG. -14.7

Question 29

Question
PSIG to ATA= [blank_start]PSIG. +14.7[blank_end] [blank_start]/14.7[blank_end]
Answer
  • /14.7
  • •14.7
  • PSIG. +14.7
  • PSIG. -14.7

Question 30

Question
PSIG to ATM PSIG. [blank_start]/14.7[blank_end]
Answer
  • /14.7
  • • 14.7
  • •33

Question 31

Question
Archimedes principle deals with the concept of
Answer
  • Pressure
  • Volume
  • Buoyancy
  • Temperature

Question 32

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

Question 33

Question
MMP stands for minimum manifold pressure.
Answer
  • True
  • False

Question 34

Question
ATM to ATA [blank_start]+1[blank_end]
Answer
  • +1
  • -1

Question 35

Question
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.
Answer
  • Partial pressure of an inert gas in breathing media
  • The water temperature

Question 36

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

Question 37

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

Question 38

Question
What changes in a diverse environment will trigger a change and gases absorbed in her body tissues.
Answer
  • 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

Question 39

Question
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?
Answer
  • True
  • False

Question 40

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

Question 41

Question
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
Answer
  • True
  • False

Question 42

Question
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.
Answer
  • True
  • False

Question 43

Question
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.
Answer
  • OBP
  • EGS
  • MMP

Question 44

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

Question 45

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

Question 46

Question
Underwater objects appear larger and closer.
Answer
  • True
  • False

Question 47

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

Question 48

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

Question 49

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

Question 50

Question
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.
Answer
  • True
  • False

Question 51

Question
At what temperature is a dry suit recommended over a wetsuit?
Answer
  • 60
  • 70

Question 52

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

Question 53

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

Question 54

Question
The volume of breathing media in storage and the adequacy of breathing media in diving system must be able to support the following:
Answer
  • 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.

Question 55

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

Question 56

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

Question 57

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

Question 58

Question
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
Answer
  • True
  • False

Question 59

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

Question 60

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

Question 61

Question
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 .
Answer
  • 6×4.5×2 = 54
  • 4×1.4×1 = 5.6

Question 62

Question
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?
Answer
  • SCF equals ATAx ACFMx Nx T= 5×1.4×1×21 = 147 SCF
  • SCF equals ATAx ACFMx Nx T=. 6×4.5×2 = 54

Question 63

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

Question 64

Question
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.
Answer
  • Two- primary and backup
  • One main intake
  • Main back up and power line

Question 65

Question
Does MMP change if you increase the number of divers supplied from a manifold box.
Answer
  • 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.

Question 66

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

Question 67

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

Question 68

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

Question 69

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

Question 70

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

Question 71

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

Question 72

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

Question 73

Question
What is the maximum descent rate?
Answer
  • 75ft/min
  • 55ft/min
  • 65ft/min

Question 74

Question
Define bottom time.
Answer
  • 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.

Question 75

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

Question 76

Question
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].
Answer
  • air
  • air
  • oxygen
  • oxygen

Question 77

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

Question 78

Question
Using the air decompression tables when does a divers time at a stop begin.
Answer
  • 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.

Question 79

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

Question 80

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

Question 81

Question
Deepest depth of dive is defined as the deepest depth the diver obtained.
Answer
  • True
  • False

Question 82

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

Question 83

Question
Total DECO time.
Answer
  • TDT
  • TTD
  • DDT

Question 84

Question
Left surface
Answer
  • LS
  • LB

Question 85

Question
TBT
Answer
  • Total time dive
  • Total deco time
  • Total bottom time

Question 86

Question
RNT
Answer
  • Residual nitrogen time
  • Reached bottom time
  • Reach surface time

Question 87

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

Question 88

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

Question 89

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

Question 90

Question
Using the air decompression tables when does a diverse time at stop and.
Answer
  • 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.

Question 91

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

Question 92

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

Question 93

Question
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.
Answer
  • True
  • False

Question 94

Question
.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.
Answer
  • True
  • False

Question 95

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

Question 96

Question
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)
Answer
  • C:19

Question 97

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

Question 98

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

Question 99

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

Question 100

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

Question 101

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

Question 102

Question
Using the air decompression tables when does a diverse time at the first in water stop begin.
Answer
  • 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.

Question 103

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

Question 104

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

Question 105

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

Question 106

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

Question 107

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

Question 108

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

Question 109

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

Question 110

Question
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.
Answer
  • True
  • False

Question 111

Question
Airbrakes count towards the required decompression time.
Answer
  • No
  • Yes

Question 112

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

Question 113

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

Question 114

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

Question 115

Question
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.
Answer
  • 15
  • 20

Question 116

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

Question 117

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

Question 118

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

Question 119

Question
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
Answer
  • Four
  • five
  • six

Question 120

Question
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.
Answer
  • True
  • False

Question 121

Question
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.
Answer
  • True
  • False

Question 122

Question
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.
Answer
  • Five minutes
  • Three minutes

Question 123

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

Question 124

Question
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?
Answer
  • 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

Question 125

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

Question 126

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

Question 127

Question
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].
Answer
  • 30
  • 40

Question 128

Question
A dive within a SI of >:10 is a repetitive dive.
Answer
  • True
  • False

Question 129

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

Question 130

Question
What are the four pieces of information you need to determine a divers RNT on a repetitive dive.
Answer
  • 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

Question 131

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

Question 132

Question
Speaker question and then give your answer
Answer
  • True
  • False
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