Term
| Body heat is lost underwater ______ times faster than in air |
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Definition
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Term
| Absolute pressure is defined as... |
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Definition
| the total pressure exerted on an object |
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Term
| Should earplugs be worn while diving? |
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Definition
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Term
| Gauge pressure is defined as... |
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Definition
| absolute pressure - 1 ATA (atmosphere absolute) |
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Term
| The greatest relative pressure change in sea water takes place between _________ feet |
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Definition
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Term
| If pain is experienced in your ears during descent, ______________ and _____________ until the pain stops |
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Definition
| stop the descent and ascend |
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Term
How does sound move underwater?
(3) |
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Definition
Sound will travel farther underwater than air
Divers find it difficult to locate the direction of a sound pronouncing source
Sound travels four times faster underwater than in air |
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Term
| If a flexible air-filled container has a volume of 40 cu ft on the surface, what would the volume be at 99 ft in sea water? |
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Definition
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Term
| The SCUBA acronym came from what event? |
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Definition
| The demand of the regulator in 1943 |
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Term
Proper equalization techniques must be learned in order to...
(3) |
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Definition
Prevent ear pain
Prevent sinus squeeze
Prevent squeeze injuries |
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Term
| The purpose of equalization is to... |
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Definition
| Introduce additional air into body air spaces in response to increasing external pressure |
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Term
| Underwater, the bending of light rays causes... |
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Definition
| objects to appear to be closer |
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Term
| The condition in which certain colors are diminished as depth increases is called... |
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Definition
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Term
| Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot |
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Definition
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Term
| The absolute pressure expressed in terms of ATA at 33 feet in sea water is... |
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Definition
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Term
One atmosphere of pressure is defined as...
(3) |
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Definition
1 ATA
Each 34ft depth of freshwater
Each 33ft depth of saltwater |
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Term
| Sinus squeeze can be prevented by... |
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Definition
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Term
Ear squeeze can be prevented by...
(5) |
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Definition
swallowing
rotating the jaw
the visalva technique
relaxing
not diving with a cold |
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Term
| The first symptom of a sinus squeeze is usually... |
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Definition
| a sharp pain or wedging sensation above the eyes |
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Term
| The absolute pressure expressed in terms of ATA at 99ft in salt water is... |
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Definition
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Term
The Delivery System components are...
(3) |
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Definition
A regulator
Alternate air source
A high pressure scuba cylinder |
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Term
| A scuba tank for recreational diving should be filled with... |
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Definition
| pure, filtered compressed air or nitrox |
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Term
The purpose of a BC is to...
(3) |
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Definition
control ascent and descent rates
maintain neutral buoyancy throughout the dive
provide surface flotation |
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Term
| Under the SSI Equipment Service Program, your Delivery System should be serviced and performance checked every... |
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Definition
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Term
| Which of the following factors affect a diver's air consumption rate? |
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Definition
extreme exertion of working heavily
poor physical condition
extreme stress brought on by improper response to anxiety-producing situations |
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Term
| A high pressure scuba cylinder should be stored and secured with a minimum of _____ psi |
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Definition
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Term
| One of the primary factors contributing to heat loss for divers is |
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Definition
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Term
The Information System components are...
(3) |
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Definition
Dive Computer
Analogue Instruments
if the Dive Computer does not supply all necessary information and SSI Total DiveLog |
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Term
| The SSI Equipment Service Program is designed to... |
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Definition
| Keep all of the components of the total diving system to optimal performance |
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Term
| An object immersed in water will be buoyed upward by... |
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Definition
| A force equal to the weight of the water it displaces |
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Term
| A scuba cylinder must be hydrostatically tested within... |
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Definition
| fixed intervals set by local laws |
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Term
| The three primary features to look for in a quality Exposure System are... |
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Definition
Thickness
Fit
Seam integrity |
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Term
| Which of the following Total Diving System subsystems best describes the SCUBA unit? |
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Definition
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Term
| Assuming a consistent air consumption rate, diving at a pressure of 4 ata will use ___ times as much air as diving at 2 ata. |
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Definition
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