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Author Question: Three types of fan blades used with centrifugal fans include: A) Forward-curved, backward-curved, ... (Read 110 times)

ap345

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on: Jul 24, 2018
Three types of fan blades used with centrifugal fans include:
 
  A) Forward-curved, backward-curved, and backward-curved airfoil.
  B) Concentric, isentropic, and exothermal.
  C) Straight, forward-curved, and right angle.
  D) Straight, right angle, and airfoil.

Question 2

Why is a check valve installed in the suction line of the lowest-temperature coil in a multiple-evaporator system?
 
  A) To allow the service technician to check the operation of the system
  B) To ensure that the refrigerant is completely vaporized before leaving the evaporator
  C) To prevent refrigerant migration from the higher-temperature-and-pressure coil to the lower-temperature and-pressure coil
  D) To allow the coil to be isolated from other evaporator coils when checking the operating of the evaporator pressure regulator


macagn

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Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

C


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ap345

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Reply #2 on: Jul 24, 2018
TY


macagn

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Reply #3 on: Jul 24, 2018
You're welcome


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