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Quiz
Lesson 4
Lesson 4
admin
June 24, 2017
September 8, 2020
QUESTIONS:
1.
Descending underwater the increase in pressure is constant at ______ Atmosphere every 10 metres.
1
2
10
20
2.
A body immersed in a fluid is ______________by the column fluid above it.
not crushed
crushed
3.
While you dive, in order to evaluate the hydrostatic equilibrium, is important to consider the relation between volume and weight of:
the BCD, the density of the liquid and the neoprene suit
the human body, the density of the liquid and the neoprene suit
the human body, the density of the liquid and the BCD
the human body, the BCD and the neoprene suit
4.
The tendency of the body to float is:
Positive Buoyancy
Neutral Buoyancy
Negative Buoyancy
5.
“At a constant temperature the volume of a gas varies _____________ with absolute pressure while the density of a gas varies ________ with absolute pressure”
inversely - directly
directly - inversely
6.
In the case of loss of regulator it is necessary to ascent and continue to
exhale
breathe
keep breathing
7.
underwater the objects appear _____________by about 1/3, water also absorbs light, an effect that increases with wather depth.
farther and bigger
closer and bigger
closer and smaller
farther and smaller
8.
Underwater sounds are transmitted ______________ because water has a greater density than air.
much more slowly
much more quickly
9.
our body contains cavities filled with gas that subjected with pressure are compensated for in two ways:
reduction of pressure - increase volume
balance of pressure - increase volume
increase pressure - reduction of volume
reduction of pressure - balance of volume
10.
Undewater it is always necessary to ____________ the mask
compensate
clean
adjust
Time is Up!
control 1*
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