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
The five different types of leukocytes (white blood cells).
The following terms describe types of body movement that occur at the diarthrotic joints
Different types of stems
Types of suture material.
Various types of cells within the human body.
Curved airflow and the gradient wind