Light travels ______ in water than in air:
A) more slowly
B) faster
C) at the same rate
D) at varying speeds according to the number of suspended
particles
- Correct Answer - A) more slowly
The atmospheric pressure at sea level is:
A) 15 PSI
B) 14 PSI
C) 16 PSI
D) 14.7 PSI
- Correct Answer - D) 14.7 PSI
Absolute pressure is the sum of:
A) gauge and sea pressure
B) gauge and total pressure
C) sea level and force pressure
,D) atmospheric and gauge pressure
- Correct Answer - D) atmospheric and gauge pressure
Ambient pressure refers to:
A) gauge and sea pressure
B) gauge and total pressure
C) total pressure surrounding the diver at any depth
D) atmospheric pressure
- Correct Answer - C) total pressure surrounding the diver at any
depth
The absolute pressure at 99 feet in salt water is:
A) 30 meters
B) 29.4 PSI
C) 3 atm
D) 4 atm
- Correct Answer - D) 4 atm
The weight of sea water per cubic foot is approx. _____ pounds
A) 14.7
B) 62.4
C) 71.2
D) 64.0 - Correct Answer - D) 64.0
,Each 2 feet of depth in water exerts an increase in pressure of
about:
A) 1/2 pound per square inch
B) 1 atm
C) 1 pound per square inch
D) 126 pounds - Correct Answer - C) 1 pound per square inch
Pressure acts upon a gas in the following manner:
A) the greater the pressure, the greater the volume
B) volume remains constant and the pressure increases
C) as the volume increases, the pressure increases
D) as pressure decreases, volume increases - Correct Answer -
D) as pressure decreases, volume increases
Pressure increases at a rate of ____ for each foot of water:
A) 1 PSI
B) 14.7 PSI
C) 33 PSI
D) .5 PSI - Correct Answer - D) .5 PSI
Salt water weighs:
A) approx. the same as fresh water
B) slightly less than fresh water
, C) slightly more than fresh water
D) 14.7 PSI more than fresh water - Correct Answer - C) slightly
more than fresh water
Objects underwater appear to be:
A) 1/3 larger and 1/4 closer than they actually are
B) 1/3 closer and 1/4 larger than they actually are
C) 1/3 smaller and 1/4 farther away than they actually are
D) the same size as their actual size - Correct Answer - A) 1/3
larger and 1/4 closer than they actually are
Sound waves travel approx. _____ times faster through water
than through air:
A) 5
B) 3.5
C) 4
D) 4.5 - Correct Answer - D) 4.5
The concept of specific heat explains why:
A) overweight divers are liable to suffer from heat exhaustion
B) warm air rises
C) air is warmer than water at the same temperature
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