Sun14November1246PM 15

When a gas volume is measured the value should be accompanied by the appropriate abbreviation.

Which of the following does STPD stand for?

(Please select 1 option)

Standing Thermally and Pressurised, Dried

Standard Temperature and Pressured, Dehydrated

Standard Temperature and Pressure, Dry Correct

Stating Thermal and Pressurised, Dehydrated

Standing Typical and Pressure, Dessicated

Explanation

The volume of a gas will depend upon:

the number of gas molecules

the thermodynamic temperature, and

the ambient pressure.

The ambient conditions during which the measurement must be recorded:

. There are a number of abbreviations that are pertinent:

STPD (Standard Temperature and Pressure, Dry) - Standardised to standard temperature (0ºC), barometric pressure at sea level (101.3 kPa) and dry gas.

ATPS (Ambient Temperature and Pressure, Saturated) - Gas is measured at ambient temperature, pressure, saturated with water vapour (for example, expired gas that has cooled)

BTPS (Body Temperature and Pressure, Saturated) - Lung volumes and flows are standardised to barometric pressure at sea level, body temperature, saturated with water vapour.

Answer Statistics

1

3%

2

10%

3

87%

4

1%

5

2%

Times answered: 238