The calculations for density and specific gravity for Systems International (SI) are:
A) Reciprocal values of ACCA standard conditions.
B) The same as AHRI standard conditions using metric values.
C) Inversely proportional when compared with AHRI standard conditions.
D) Reciprocal values of ANSI standard conditions.
[Ques. 2] The substance used to compare the specific gravity of liquids is:
A) Water. B) Ozone. C) Carbon dioxide. D) Air.
[Ques. 3] The triple point of a substance is:
A) That point when the substance changes its specific gravity at the same pressure, temperature, and volume.
B) The point when the density of a substance changes to a solid, liquid, or vapor at standard conditions.
C) The point at which the substance changes state at the same pressure, temperature, and volume.
D) The point where a substance can exist as a solid, liquid, or vapor at the same time at one specific pressure and temperature.
[Ques. 4] The AHRI definition of standard air is:
A) 400 CFM per ton.
B) Air at a temperature of 0C with a relative humidity of 50.
C) Air weighing 0.075 lb/ft3 at 70F with a barometric pressure of 29.92 in Hg.
D) 78 nitrogen, 21 oxygen, and 1 other gases.
[Ques. 5] The ________ set of standard conditions are used to reference pressure and temperature when calculating specific gravity and specific volume of substances.
A) RSES B) ASHRAE C) AHRI D) ACCA
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