Dive master exam Questions With Answers Graded A+ Assured Success
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Course
Dive master
Institution
Dive Master
What is visual reversal? - in very clear water objects appear further away due to the particles in
the water that resembles haze over great distance
An hour after surfacing from a deep dive, a diver complains of fatigue and numbness in one shoulder.
This diver should seek medical attention becau...
Dive master exam
What is visual reversal? - in very clear water objects appear further away due to the particles in
the water that resembles haze over great distance
An hour after surfacing from a deep dive, a diver complains of fatigue and numbness in one shoulder.
This diver should seek medical attention because the diver may have:
a. carried equipment that was too heavy.
b. decompression illness.
c. contaminated air poisoning
d. overexertion - b
Why does water absorb more heat than air? - - it is denser
- it forms weaker bonds
What takes away heat from the body... times faster than air - 20
Refraction magnifies objects underwater by a ratio of ... - 4:3
Light changes... as it passes through water - speed, causing it to change direction slightly
Sound travels slightly more than ... times faster in water than air - 4
What determines how well sound travels through a substance? - Elasticity- water has a higher
elasticity than air so travels faster
what is absolute absolute pressure - the total pressure
, what is ambient pressure - the surrounding pressure
for every ... metres, the pressure increases by ... (plus one for the surface) - 10, 1
for every ... meters in freshwater, the pressure increases by 1 - 10.3
Double the surface pressure= - half the volume
at a depth of 20 metres, what would the pressure and volume be? - Pressure = 3 bar and volume
= 1/3 full
Double pressure.. - double the density (or half pressure = half the density)
if we were diving 40 meters, the cylinder would only last ... of the time at the surface - 1/5
What is the amount of buoyancy based off? - how much fluid the object displaces compared to its
weight
how do you increase buoyancy? - reducing weight and increasing displacement
how do we calculate partial pressure? - multiply the percentage of the gas by the pressure dpeth
what is the partial pressure of oxygen set at? - 1.4 bar for recreational diving
what is saturation - the pressure of the dissolved gas will equalize with the pressure of the gas in
contact with the liquid
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