Physics for anaesthesia: humidity and temperature
Physics of Humidity and Temperature in Anaesthesia
Test your knowledge on the crucial concepts of humidity and temperature as they relate to anaesthesia and patient care. This quiz will challenge you with a variety of multiple-choice questions designed to enhance your understanding of thermometers, heat loss during anaesthesia, and the effects of humidity.
Key topics include:
- Temperature Measurement
- Heat Loss Mechanisms
- Humidity and Its Effects
- Types of Humidifiers
SBA: Thermistors are better temperature sensors than platinum wires because they
A. Have a more linear response
B. Have a positive temperture coefficient of resistance
C. Are more sensitive
D. Give better repeatibility
E. Are cheaper
SBA: Temperature of the human body on the Kelvin scale is:
A. 37 K
B. 298.15 K
C. 300 K
D. 310 K
E. 335 K
SBA: an infrared thermometer:
A. Must be in good contact with the ear
B. Must have a clean line of sight to the tympanic membrane
C. Requires several seconds to obtain a reading
D. In insensitive to debris in the ear
E. May be used at other anatomic sites
MTF: regarding heat loss during anaesthesia, which of the following statements ae true?
A. Blankets made from aluminum foil reduces radiation heat losses
B. Conduction accounts for about 5 % of heat loss
C. Convection is the most significant source of heat loss during anaesthesia
D. Respiration accounts for only 10% of heat lost
E. When the relative humidity is high the cooling effecct of sweat is increased
MTF: if 2 bodies are in thermal equilibrium:
A. They have the same temperature
B. The contain the same amount of heat
C. They have the same heat capacity
D. No heat flows between them
E. They have the same specific heat capacity
SBA: As humidity rises:
The human hair tends to contract in lenght
B. The temperature differencee between wet bulb and dry bulb thermometers increase
C. The saturated vapour pressure of water decreases
D. The dew point decreases
E. The density of the air increases
SBA: regarding humidity, which is true?
A. Relative humidity is proportional to absolute humidity
B. Absolute humidity is independent of temperature
C. Absolute humidity increases with temperature
D. The amount of watre in the air depends on the air temperature
E. Hair hygrometers measure absolute humidity
SBA: a device used to measure humidity is called:
A. A thermometer
B. A psychrometer
B. A hydrometer
D. A hygrometer
MTF: which of the following are true of humidification
A. HME can achieve up to 100% relative humidity
B. Hot water bath humidifiers present no risk to the patient
C. Temperature has no effect on the amount of water that can be present as a vapour
D. The wet and dry bulb hygrometer measures absolute humidity
E. Ultrasonic humidifier can achieve 100% relative humidity
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