Chemistry & Physics of Anesthesia Test
Questions and Answers
Question 1
Flow meters are designed for each individual gas according to their:
Correct Answer
A. Density and viscosity
B. pressure,
C. temperature,
D. Volume
*Density = Turbulent flow --> Reynolds #
*Viscosity = Laminar flow --> Pouiselle's Law
-Vaporizers are designed according to the gas's individual pressure.
Page 1 of 42
,Question 2
Which physical laws applies to the characteristics of gas flow in the presence of low
fresh gas flows in Thorpe gas tubes?
Correct Answer
A. law of la place
B. daltons law
C. grahams law
D. Pouiselle's Law
**Pouiselle's Law
-GAS flow through RADIUS
-LAMINAR FLOW (questions asks about LOW FGF)
-Renyolds number <2,000
___________________________________________________________
Law of La Place = La POP! Pressure & Tension
Daltons= Total sum of partial pressures
Grahams = Weight
Page 2 of 42
,Question 3
Which LEAST describes the properties related to vapor pressure?
Correct Answer
A. increases heat increases vapor pressure
B. equalization of vapor with the liquid state
C. increasing vapor pressure are more volatile
D. evaporation rate = condensation rate in ambient conditions
The rationale was that DES is the only one that requires a heater to increase the
vapor pressure (doesn't encompass all three)
Question 4
CO2 is 45…. What is the CO2 dissolved?
Correct Answer
3.015 (or 2.7 depending on which constant you used)
--dumb, we should all be using the same constant
_________________________________________-
CO2 dissolved = 0.067 (constant) x CO2
0.067 x 45 = 3.015
OR
0.06 x 45 = 2.7
Page 3 of 42
, Question 5
Which of the following laws or effects is utilized in nebulizers?
Correct Answer
Venturi Effect
(effect of Bernoulli principle)
Question 6
What happens to the content of an O2 tank when moved from cold to warm
environment?
Correct Answer
A. Volume increases
B. Volume decreases
C. Pressure increases
D. Pressure decreases
Also could be worded as:
*increased PSI/increased pounds per square inch
*Increase in molecular impacts (increased energy/atp)
*Think- temp increases, pressure increases
*Gay-Lussac's
-Note: if a N2O tank would be placed in a higher temperature, the VOLUME would
expand, and the PSI would be unchanged (nitrous doesn't operate by the other
laws)
Page 4 of 42
Questions and Answers
Question 1
Flow meters are designed for each individual gas according to their:
Correct Answer
A. Density and viscosity
B. pressure,
C. temperature,
D. Volume
*Density = Turbulent flow --> Reynolds #
*Viscosity = Laminar flow --> Pouiselle's Law
-Vaporizers are designed according to the gas's individual pressure.
Page 1 of 42
,Question 2
Which physical laws applies to the characteristics of gas flow in the presence of low
fresh gas flows in Thorpe gas tubes?
Correct Answer
A. law of la place
B. daltons law
C. grahams law
D. Pouiselle's Law
**Pouiselle's Law
-GAS flow through RADIUS
-LAMINAR FLOW (questions asks about LOW FGF)
-Renyolds number <2,000
___________________________________________________________
Law of La Place = La POP! Pressure & Tension
Daltons= Total sum of partial pressures
Grahams = Weight
Page 2 of 42
,Question 3
Which LEAST describes the properties related to vapor pressure?
Correct Answer
A. increases heat increases vapor pressure
B. equalization of vapor with the liquid state
C. increasing vapor pressure are more volatile
D. evaporation rate = condensation rate in ambient conditions
The rationale was that DES is the only one that requires a heater to increase the
vapor pressure (doesn't encompass all three)
Question 4
CO2 is 45…. What is the CO2 dissolved?
Correct Answer
3.015 (or 2.7 depending on which constant you used)
--dumb, we should all be using the same constant
_________________________________________-
CO2 dissolved = 0.067 (constant) x CO2
0.067 x 45 = 3.015
OR
0.06 x 45 = 2.7
Page 3 of 42
, Question 5
Which of the following laws or effects is utilized in nebulizers?
Correct Answer
Venturi Effect
(effect of Bernoulli principle)
Question 6
What happens to the content of an O2 tank when moved from cold to warm
environment?
Correct Answer
A. Volume increases
B. Volume decreases
C. Pressure increases
D. Pressure decreases
Also could be worded as:
*increased PSI/increased pounds per square inch
*Increase in molecular impacts (increased energy/atp)
*Think- temp increases, pressure increases
*Gay-Lussac's
-Note: if a N2O tank would be placed in a higher temperature, the VOLUME would
expand, and the PSI would be unchanged (nitrous doesn't operate by the other
laws)
Page 4 of 42
