The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
-A: 2 ata
-B:1 ata
-C: 4 ata
-D: 3 ata
A: 2
... [Show More] ata
Gauge pressure is defined as:
-A: Hydrostatic pressure minus 1 ata
-B: The pressure at the surface
-C: The depth reading on a gauge
-D: Absolute pressure minus 1 ata
D: Gauge pressure is defined as Absolute pressure minus 1 ata
The first symptom of a sinus squeeze is usually:
-A: a dull pain deep within the head
-B: a sharp pain at the base of the neck
-C: a crushing pain high in the chest
-D: a sharp pain above the eyes
D: a sharp pain above the eyes
If you experience pain in the ear during descent:
-A: Stop the descent and ascend till the pain stops
-B: abort the dive
-C: place a finger in the ear canal and gently massage the ear until the pain ceases
-D: continue the descent while gently exhaling into the mask
A: Stop the descent and ascend till the pain stops.
Body heat is lost at a rate of ___ than air.
25-30 times faster
Proper equalization techniques must be learned in order to:
-A: prevent sinus squeeze
-B: prevent ear pain
-C: prevent squeeze injuries
-D: all answers are correct
D
The purpose of equalization is to:
-A: ensure the uneven application of pressure between the water and air spaces in the body
-B: prevent water from entering air spaces in the body
-C: introduce additional air into body air spaces in response to increasing external pressure
-D: remove all fluids from body air spaces
C: introduce additional air into body air spaces in response to increasing external pressure
The three primary features to look for in a quality Exposure System are:
Thickness, fit, & seam integrity
An object immersed in water will be buoyed upward by a force ______ to the weight of the water it displaces.
equal
A high pressure scuba cylinder should be stored:
-A: secured with a minimum of 500 to 750 psi
-B: lying flat with no air
-C: with the valve slightly open to allow air expansion
-D: secured with the valve open
A: A high pressure scuba cylinder should be stored secured with a minimum of 500 to 750 psi
One of the primary factors contributing to heat loss for divers is:
-A: Absorption
-B: Convection
-C: Diffusion
-D: Refraction
B: One of the primary factors contributing to heat loss for divers is Convection
The Information System components are:
A: Dive Computer
B: Analogue Instruments
C: SSI DiveLog
D: All the above
D: All of the above (Dive Computer, Analogue Instruments, & SSI DiveLog)
The purpose of a BC is to:
-Provide surface floatation
-Maintain neutral buoyancy during the dive
-Control ascent and descent rates
Under the SSI Equipment Service Program, your Delivery System should be serviced and performance checked:
-A: every 3 years
-B: every 5 years
-C: every month
-D: every year
D: every year
Assuming a consistent air consumption rate, diving at a pressure of 4 ata will use __ as much air as diving at 2 ata.
2 times
During normal diving activities, divers should never exceed an ascent rate of __ feet per minute.
30
A scuba tank for recreational diving should be filled with:
-A: A mixture of helium and oxygen
-B: Pure, filtered compressed air or Nitrox
-C: A mixture of hydrogen and oxygen
-D: pure oxygen
B: A scuba tank for recreational diving should be filled with Pure, filtered compressed air or Nitrox
The rate at which the body becomes saturated with nitrogen:
-A: will vary based on factors, such as depth and blood supply to a particular area of the body
-B: is always the same rate
-C: is slower at the beginning of the process and faster at the end of the process
-D: is faster t the beginning of the process and slower at the end of the process
A: will vary based on factors, such as depth and blood supply to a particular area of the body [Show Less]