324.
If one cubic foot of substance A
weighs more than one cubic foot of
substance B, what is the
relationship between the densities
of substances A and B?
1.
The density of substance A is
greater than the density of
substance B
2.
The density of substance A is
less than the density of
substance B
3.
The density of substance A is
the same as the density of
substance B
4.
Not enough information is given
to determine the relationship
325.
Depth charges are dropped in the
vicinity of a submerged submarine.
The depth charge illustrated in
textbook figure 101 is set so as
to be exploded by the
1.
speed of the depth charge as it
nears the submarine
2.
speed of the depth charge as it
enters the water
3.
impact of the depth charge
against the hull of the
submarine
4.
pressure of the water at the
estimated depth of the
submarine
326.
Hydrostatic pressure in a torpedo
is employed to
1.
maintain the torpedo on course
2.
launch the torpedo
3.
keep the torpedo at desired
depth
4.
increase the torpedo speed
3-27.
In a torpedo depth engine, the
setting of the depth screw
determines the
1.
pressure of the air supplied to
the depth engine
2.
length of the pendulum
3.
angular set of the vertical
rudders
4.
amount of force which is
required to move the diaphragm
328.
The air pumped into a divers suit
helps him or her to withstand the
pressure of the water because
1.
pressure of the air in the
divers suit is greater than
the pressure of the water
2.
air enters the divers body so
that the pressure inside his or
her body is equal to the water
pressure
3.
air is compressible and water
is not
4.
force is not transmitted by air
3-29.
The pressure in a divers suit must
be released gradually because
1.
if pressure is released too
rapidly, the air which entered
the divers body under high
pressure will cause bubbles to
form in his or her blood stream
2.
the divers lungs cannot
quickly become adjusted to
breathing air at normal
pressure
3.
the divers blood circulation
was partly cut off while under
high pressure, and sudden
return of normal circulation is
painful
4.
air at normal pressure contains
less oxygen than air at high
pressure,
and the body must
adjust to this condition
gradually
330.
The pitometer log determines the
speed of a ship by measuring the
difference between
1.
hydrostatic pressure near the
keel of the ship and
hydrostatic pressure near the
water line
2.
hydrostatic pressure and the
pressure of water in motion
past the ship at the same depth
3.
pressure of the water moving
past the ship and atmospheric
pressure
4.
pressure of the water moving
past the ship and the speed of
surface wind
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