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1. The concentration of a specific gas in solution depends on which of the
following?
A. Temperature of the solution
B. Volume of the system
C. Solubility of the specific gas in that solution
D. Molecular weight of the gas
2. Which of the following statements is true about the partial pressure of a gas at
equilibrium?
A. Directly proportional to its concentration of gas in solution
B. Inversely proportional to its concentration of gas in solution
C. Less than its concentration of gas in solution
D. Greater than its concentration of gas in solution
3. A vaporizer is mishandled and accidentally tipped on its side. Which of the
following is the best course of action to take?
A. Run high fresh gas flows with the dial set to a high concentration for 30 minutes.
B. Run high fresh gas flows with the dial set to a low concentration for 30 minutes.
C. Run low fresh gas flows with the dial set to a low concentration for 30 minutes.
D. Run low fresh gas flows with the dial set to a high concentration for 30 minutes.
4. Which of the following would increase the output concentration of a volatile
anesthetic from a vaporizer?
A. Fresh gas flow rate of 100 mL/min
B. Fresh gas flow rate of 20 L/min
C. Decreased operating room temperature
D. Significantly increasing the ratio of oxygen to nitrous oxide
5. To decrease temperature fluctuations while delivering an anesthetic agent,
manufacturers seek to use vaporizer materials that have which of the following
properties?
A. Low specific heat, high thermal conductivity
B. Low specific heat, low thermal conductivity
C. High specific heat, high thermal conductivity
D. High specific heat, low thermal conductivity
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6. 6. A portable E-cylinder of oxygen has 1760 psig. In approximately what time
frame will the cylinder be depleted if used at 8 L/min?
A. 30 minutes
B. 45 minutes
C. 60 minutes
D. 85 minutes
7. Which of the following statements defines the critical temperature?
A. The temperature at which a liquid will boil
B. The highest temperature at which a gas can exist in liquid form
C. The temperature at which a substance can exist as a gas or liquid
D. The temperature at which a solid becomes a liquid
8. Which of the following describes the partial pressure of inhaled anesthetics in
the central nervous system (CNS), blood, and alveoli at equilibrium?
A. CNS partial pressure (PCNS) = blood partial pressure (Pblood) = alveolar
partial pressure (Palveolar)
B. PCNS > Pblood = Palveolar
C. PCNS < Pblood = Palveolar
D. PCNS = Pblood < Palveolar
9. Which of the following would increase the rate of rise of Fa/Fi?
A. A high blood:gas solubility
B. A high cardiac output
C. A low minute ventilation
D. A high anesthetic concentration
10. After an 8-hour general anesthetic case with volatile agents, which tissue group
plays the greatest role in determining emergence time?
A. Vessel-rich tissue
B. Muscle
C. Fat
D. Each is equal
11. Which of the following is the purpose of the check valve on the anesthesia
machine?
A. To prevent hypoxic gas mixtures
B. To prevent gas flow from the common gas outlet to the vaporizers
C. To prevent overly high flows of oxygen
D. To ensure adequate ratios of oxygen to nitrogen
12. Which of the following flowmeter arrangements would be the most likely to
lead to a hypoxic gas mixture?
A. N2O, Air, O2
B. Air, N2O, O2
C. N2O, O2
, Air
D. O2
, Air, N2O
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13. Standards for basic anesthetic monitoring during general anesthesia include
which of the following?
A. Continuous display of MAC
B. Continuous display of electrocardiogram
C. Continuous display of tidal volume
D. Continuous display of temperature
14. 14. Which of the following would cause an abrupt decrease in the end-tidal CO2
(ETCO2
) during general anesthesia?
A. Hyperthermia
B. Sepsis
C. Shivering
D. Pulmonary embolism
15. To mitigate the effects of attenuation during ultrasonography, an
anesthesiologist would perform which of the following maneuvers?
A. Use a low-frequency signal.
B. Use a high-frequency signal.
C. Increase the amplitude.
D. Decrease the amplitude.
16. To maximize the axial resolution of an ultrasound image, an anesthesiologist
would use which of the following?
A. Long pulses of low frequency
B. Long pulses of high frequency
C. Short pulses of low frequency
D. Short pulses of high frequency
17. Flow proportioning systems of anesthesia machines were designed to prevent
which of the following?
A. Inconsistent proportions of volatile anesthetic gases
B. Hypoxic mixtures of nitrogen and oxygen
C. Inaccurate proportions of gas flow to the common gas outlet
D. Direct communication between the high-pressure and low-pressure circuits
18. Which of the following devices prevents the delivery of a hypoxic mixture by
ensuring appropriate connections from the hospitals’ pipeline gas supply to the
anesthesia machine?
A. Second-stage oxygen pressure regulator
B. Pin Index Safety System
C. Diameter Index Safety System
D. Check valve
19. An isolated power system (IPS) acts to prevent which of the following
situations?
A. Prevention of operating room power loss
B. Prevention of an ungrounded operating room
C. Prevention of macroshock
D. Prevention of microshock
20. All of the following are functions of the equipment ground wire EXCEPT which
one?
A. Provides a low-resistance path for fault currents to decrease the risk of
macroshock.
B. Minimizes leakage currents that may cause microshock in certain patients.
C. Provides information to the line isolation monitor on the status of an ungrounded
system.
D. Acts to eliminate the need for ground fault circuit interrupters (GFCIs).
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