PE006 Practice Test

1Multiple ChoiceSelect all that apply

An air-handling unit supplies air at 13 °C DB (dry-bulb) and 11 °C WB (wet-bulb) to a room with a sensible heat ratio (SHR) of 0.80. Which two of the following statements about the supply air state and its relation to the room condition are correct? (Choose two.)

A.The supply air dew point equals the dew point of air at 13 °C DB / 50% RH, approximately 2.7 °C.
B.Because the room SHR equals 0.80, the supply air temperature lies on the room sensible heat ratio line drawn between the room condition and the apparatus dew point.
C.A supply air state of 13 °C DB / 11 °C WB implies a relative humidity of 100% at the coil surface.
D.The enthalpy of the supply air is lower than the enthalpy of the room return air.
E.Lowering the leaving-air temperature from the coil without changing the coil selection would necessarily decrease the supply air enthalpy.

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