Dive Master Practice Exam Questions
With Updated Correct Answers.
Your understanding of the aquatic relem is important for accessing dive conditions and emergency
planning , as well as explaining to divers how to interact responsibly with environment
True or False - Answer True
What is the ocean's maor source of productivity and the base of the marine food chain?
A. Drill
B. Seagrass
C. Coral
D. Phytoplankton - Answer D. Phytoplankton
Natrual processes, such as earthquakes and storms, are much more of a severe threat to coral reefs and
wetlands than human-induced threats such as pollution.
True or False - Answer False
When and alien (invasive) species is introduced into an ecosystem, it may have no natural enemies,
which allows it to quickly multiply and possible overtake and kill off native species.
True or False - Answer rue
A _________exits when relatively warm, low-density surface water is separated from cool, high-density
deep water
A. freshwater layer
B. thermocline
C. downewelling
D. rip current. - Answer
,If you stand on a beach and watch water generally moving down the coast, pushed by waves
approaching the shore at an angle and assisted by the prevailing wind, you are looking at a
_____________________current.
a. rup
B. tidal
c. longshore
d.upwelling - Answer longshore
A day after strong winds drive surface waters offshore, you notice that water conditions become clear
and cool. This is likely due to:
a. downwelling.
b. extreme tides.
c. a longshore current.
d. upwelling. - Answer d. upwelling
Gravitational interaction between the sun, moon and earth cause____________, while wind is the most
common disturbing force that causes________________________.
a. tides/ waves
b. surge/ currents
.c. rip currents /ocean swells
d. waves/ tides - Answer a. tides/ waves
True or False. As a wave moves toward shore, its energy is affected by the bottom cassing the wave
height to rise, eventually becoming unstable and spilling its energy as surf. - Answer True
Way that you can encourage divers to protect the underwater world include:
a. be a role model for other divers, dive carefully and be aware of equipment placement when diving.
b. respect underwater cultural heritage and maritime history
c. report environmental disturbance or destruction and get involved in local - Answer All of them
, While outside, at a very cold temperature, you fill a balloon with air What will happen when you take the
balloon inside and place it near a heater?
a. The density in the balloon will remain unchanged.
b. The volume of the balloon will decrease .
c. Teh pressure in the balloon will increase.
d. The volume of the balloon will increase. - Answer d. The volume of the balloon will increase.
Approximately how much denser is the air you breathe at a depth of 30 meters/99 feet as compared to
the surface?
a. It is equal to the surface density.
b. Two times as dense
c. Three times as dense
d. Four times as dense. - Answer c. Three times as dense
If a balloon is filled to 1 litre at 40 metres/ 132 feet and then released., assuming it does not explode,
what will its volume be upon reaching the surface?
a. 5 litres
b. 4 litres
c. 2 litres
d. 1 litres - Answer
IF a diver breathes from a cylinder that contains .05% carbon monoxide at a pressure of three
atmospheres, it will have the same physical effect as if the diver were breathing ___________% carbon
monoxide at one atmosphere.
a. 1.5
b. 0.15
c. .02
d. 0.2 - Answer b. 0.15
Scuba divers who ass-send to altitude soon after completing a dive increase their risk of decompression
sickness because,
With Updated Correct Answers.
Your understanding of the aquatic relem is important for accessing dive conditions and emergency
planning , as well as explaining to divers how to interact responsibly with environment
True or False - Answer True
What is the ocean's maor source of productivity and the base of the marine food chain?
A. Drill
B. Seagrass
C. Coral
D. Phytoplankton - Answer D. Phytoplankton
Natrual processes, such as earthquakes and storms, are much more of a severe threat to coral reefs and
wetlands than human-induced threats such as pollution.
True or False - Answer False
When and alien (invasive) species is introduced into an ecosystem, it may have no natural enemies,
which allows it to quickly multiply and possible overtake and kill off native species.
True or False - Answer rue
A _________exits when relatively warm, low-density surface water is separated from cool, high-density
deep water
A. freshwater layer
B. thermocline
C. downewelling
D. rip current. - Answer
,If you stand on a beach and watch water generally moving down the coast, pushed by waves
approaching the shore at an angle and assisted by the prevailing wind, you are looking at a
_____________________current.
a. rup
B. tidal
c. longshore
d.upwelling - Answer longshore
A day after strong winds drive surface waters offshore, you notice that water conditions become clear
and cool. This is likely due to:
a. downwelling.
b. extreme tides.
c. a longshore current.
d. upwelling. - Answer d. upwelling
Gravitational interaction between the sun, moon and earth cause____________, while wind is the most
common disturbing force that causes________________________.
a. tides/ waves
b. surge/ currents
.c. rip currents /ocean swells
d. waves/ tides - Answer a. tides/ waves
True or False. As a wave moves toward shore, its energy is affected by the bottom cassing the wave
height to rise, eventually becoming unstable and spilling its energy as surf. - Answer True
Way that you can encourage divers to protect the underwater world include:
a. be a role model for other divers, dive carefully and be aware of equipment placement when diving.
b. respect underwater cultural heritage and maritime history
c. report environmental disturbance or destruction and get involved in local - Answer All of them
, While outside, at a very cold temperature, you fill a balloon with air What will happen when you take the
balloon inside and place it near a heater?
a. The density in the balloon will remain unchanged.
b. The volume of the balloon will decrease .
c. Teh pressure in the balloon will increase.
d. The volume of the balloon will increase. - Answer d. The volume of the balloon will increase.
Approximately how much denser is the air you breathe at a depth of 30 meters/99 feet as compared to
the surface?
a. It is equal to the surface density.
b. Two times as dense
c. Three times as dense
d. Four times as dense. - Answer c. Three times as dense
If a balloon is filled to 1 litre at 40 metres/ 132 feet and then released., assuming it does not explode,
what will its volume be upon reaching the surface?
a. 5 litres
b. 4 litres
c. 2 litres
d. 1 litres - Answer
IF a diver breathes from a cylinder that contains .05% carbon monoxide at a pressure of three
atmospheres, it will have the same physical effect as if the diver were breathing ___________% carbon
monoxide at one atmosphere.
a. 1.5
b. 0.15
c. .02
d. 0.2 - Answer b. 0.15
Scuba divers who ass-send to altitude soon after completing a dive increase their risk of decompression
sickness because,
