SDI Divemaster OBJECTIVE
ASSESSMENT EXAM QUESTIONS
WITH CORRECT
SOLUTIONS|UPDATED 2025 NEW
SYLLABUS UPGRADED
VERSION||100% GUARANTEED
PASS!!!
Categories of diving - ANSWER ✓ Recreational
Commercial
Scientific
Military
To maintain proper buoyancy control the diver needs to add air during descent and
vent air during ascent. - ANSWER ✓ Air in the BCD/Dry Suit
Can be caused by a diver holding their breath while ascending to a shallower
depth. - ANSWER ✓ Lung Rupture
Increases at depth, which may make breathing difficult if the diver overexerts
himself. - ANSWER ✓ Air Density
= (P1 x minutes1) / P2 - ANSWER ✓ Gas Supply Duration at New Pressure
Equation
P2 / P1 - ANSWER ✓ Relative Change in Pressure
At a constant pressure, the volume of the gas increases or decreases by the same
factor as the temperature
V1/T1 = V2/T2 - ANSWER ✓ Charles' Law
, At a constant volume, the pressure of a gas increases or decreases by the same
factor as its temperature
P1/T1=P2/T2 - ANSWER ✓ Gay-Lussac's Law
= °C + 273 - ANSWER ✓ Celsius to Kelvin
= °F + 460 - ANSWER ✓ Fahrenheit to Rankine
Change of 1°C will result in a change of 0.6 bar.
Change of 1°F will result in a change 5 psi. - ANSWER ✓ Estimates for
Temperature and Pressure
The relationship between the pressure, volume, and temperature of a fixed amount
of gas.
P1V1/T1=P2V2/T2 - ANSWER ✓ Combined Gas Law
Based upon the hypothesis that the volume of two theoretical "ideal" gases under
the same pressure and at the same temperature should contain the same mass.
PV =nRT - ANSWER ✓ Ideal Gas Law
States that the total pressure of a mixture of gases is equal to the sum of the
pressures of all the gases in the mixture. Each gas within a mixture has its own
pressure and each has is unaffected by any other gas un the mixture.
PO2 = P x FO2
PN2 = P x FN2
P = PO2 / FO2 - ANSWER ✓ Dalton's Law of Partial Pressures
Move from an area of higher partial pressure and density to an area of lower
partial pressure and density. - ANSWER ✓ Gas Tendency
Metric: EAD = [(FN.79) x (D + 10)] - 10
Imperial: EAD = [(FN.79) x (D + 33)] - 33 - ANSWER ✓ Equivalent Air
Depth Calculation for Nitrox
At a constant temperature, the quantity of a gas which is dissolved in a given type
and volume of liquid is directly proportional to the partial pressure of that gas in
equilibrium with that liquid.
ASSESSMENT EXAM QUESTIONS
WITH CORRECT
SOLUTIONS|UPDATED 2025 NEW
SYLLABUS UPGRADED
VERSION||100% GUARANTEED
PASS!!!
Categories of diving - ANSWER ✓ Recreational
Commercial
Scientific
Military
To maintain proper buoyancy control the diver needs to add air during descent and
vent air during ascent. - ANSWER ✓ Air in the BCD/Dry Suit
Can be caused by a diver holding their breath while ascending to a shallower
depth. - ANSWER ✓ Lung Rupture
Increases at depth, which may make breathing difficult if the diver overexerts
himself. - ANSWER ✓ Air Density
= (P1 x minutes1) / P2 - ANSWER ✓ Gas Supply Duration at New Pressure
Equation
P2 / P1 - ANSWER ✓ Relative Change in Pressure
At a constant pressure, the volume of the gas increases or decreases by the same
factor as the temperature
V1/T1 = V2/T2 - ANSWER ✓ Charles' Law
, At a constant volume, the pressure of a gas increases or decreases by the same
factor as its temperature
P1/T1=P2/T2 - ANSWER ✓ Gay-Lussac's Law
= °C + 273 - ANSWER ✓ Celsius to Kelvin
= °F + 460 - ANSWER ✓ Fahrenheit to Rankine
Change of 1°C will result in a change of 0.6 bar.
Change of 1°F will result in a change 5 psi. - ANSWER ✓ Estimates for
Temperature and Pressure
The relationship between the pressure, volume, and temperature of a fixed amount
of gas.
P1V1/T1=P2V2/T2 - ANSWER ✓ Combined Gas Law
Based upon the hypothesis that the volume of two theoretical "ideal" gases under
the same pressure and at the same temperature should contain the same mass.
PV =nRT - ANSWER ✓ Ideal Gas Law
States that the total pressure of a mixture of gases is equal to the sum of the
pressures of all the gases in the mixture. Each gas within a mixture has its own
pressure and each has is unaffected by any other gas un the mixture.
PO2 = P x FO2
PN2 = P x FN2
P = PO2 / FO2 - ANSWER ✓ Dalton's Law of Partial Pressures
Move from an area of higher partial pressure and density to an area of lower
partial pressure and density. - ANSWER ✓ Gas Tendency
Metric: EAD = [(FN.79) x (D + 10)] - 10
Imperial: EAD = [(FN.79) x (D + 33)] - 33 - ANSWER ✓ Equivalent Air
Depth Calculation for Nitrox
At a constant temperature, the quantity of a gas which is dissolved in a given type
and volume of liquid is directly proportional to the partial pressure of that gas in
equilibrium with that liquid.
