Given the following readings from an electric furnace, use the ...

[ssal]

Given the following readings from an electric furnace, use the formula to calculate airflow.
 
  CFM =
 
  What is the airflow in CFM and does this furnace have the recommended air flow?
 
  Voltage at strips 240 V
  Amp draw of strips 22.6 A
  Return-air temperature 65 F
  Supply-air temperature 120 F
 
  A) The air flow is 312 CFM; No, the air flow is too low.
  B) The airflow is 336 CFM; No, the air flow is too low.
  C) The air flow is 312 CFM; Yes, the air flow is at the recommended level.
  D) The airflow is 336 CFM; Yes, the air flow is at the recommended level.

Question 2

Some water source heat pumps contain a separate coaxial coil for heating domestic hot water. The heat for the domestic hot water comes from
 
  A) a submersion style electric heater
  B) subcooling the liquid leaving the condenser
  C) de-superheating the hot gas leaving the compressor
  D) using the water heating coil instead of the loop in cooling

[daiying98]

Answer to Question 1

C

Answer to Question 2

C

[ssal]

TY

[daiying98]

You're welcome