Divemaster Exam 2 Questions And Answers
Latest 2025
When an alien (invasive) species is introduced into an ecosystem, it
may have no natural enemies, which allows it to quickly multiply
and possibly overtake and kill off native species. -
correct answer ✅False- Alien species may have no natural
predators, which allows them to multiply quickly and potentially
harm native species by preying on them, eating their food, and
occupying available habitat.
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. -
correct 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 -
correct answer ✅downwelling
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? -
correct answer ✅volume of the balloon will increase
, Divemaster Exam 2 Questions And Answers
Latest 2025
Approximately how much denser is the air you breathe at a depth
of 30 metres/99 feet as compared to the surface? -
correct answer ✅four 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? -
correct answer ✅The volume of a balloon released from five
atmoshperes would increase by five times becoming 5 litres.
Scuba divers who ascend to altitude soon after completing a dive
increase their risk of decompression sickness because -
correct answer ✅When a diver ascends to decreased pressure at
altitude, gases dissolved in tissues may come out faster than at sea
level. Because dive tables are based on surfacing at sea level, the
diver has an increased risk of bubble formation leading to
decompression sickness.
If an air mixture contains 80% nitrogen and 20% oxygen at sea level,
what will the partial pressure of nitrogen be if its taken to 20
metres/66 feet in sea water? -
correct answer ✅Multiply the pressure by the percent of nitrogen
Latest 2025
When an alien (invasive) species is introduced into an ecosystem, it
may have no natural enemies, which allows it to quickly multiply
and possibly overtake and kill off native species. -
correct answer ✅False- Alien species may have no natural
predators, which allows them to multiply quickly and potentially
harm native species by preying on them, eating their food, and
occupying available habitat.
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. -
correct 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 -
correct answer ✅downwelling
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? -
correct answer ✅volume of the balloon will increase
, Divemaster Exam 2 Questions And Answers
Latest 2025
Approximately how much denser is the air you breathe at a depth
of 30 metres/99 feet as compared to the surface? -
correct answer ✅four 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? -
correct answer ✅The volume of a balloon released from five
atmoshperes would increase by five times becoming 5 litres.
Scuba divers who ascend to altitude soon after completing a dive
increase their risk of decompression sickness because -
correct answer ✅When a diver ascends to decreased pressure at
altitude, gases dissolved in tissues may come out faster than at sea
level. Because dive tables are based on surfacing at sea level, the
diver has an increased risk of bubble formation leading to
decompression sickness.
If an air mixture contains 80% nitrogen and 20% oxygen at sea level,
what will the partial pressure of nitrogen be if its taken to 20
metres/66 feet in sea water? -
correct answer ✅Multiply the pressure by the percent of nitrogen
