DIVEMASTER EXAM QUESTIONS WITH
VERIFIED ANSWERS. A+ GRADE
2025/2026.
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 - ANS 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 - ANS 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 - ANS 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 - ANS rue
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,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. - ANS
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 - ANS 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. - ANS 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 - ANS a. tides/ waves
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, 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. - ANS 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 - ANS 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. - ANS 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. - ANS 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 - ANS
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
VERIFIED ANSWERS. A+ GRADE
2025/2026.
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 - ANS 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 - ANS 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 - ANS 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 - ANS rue
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,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. - ANS
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 - ANS 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. - ANS 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 - ANS a. tides/ waves
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, 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. - ANS 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 - ANS 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. - ANS 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. - ANS 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 - ANS
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
