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
Remedies for insomnia include increased physical exercise and time spent outdoors.
The most commonly used socket drive sizes include 1/4, 3/8, and 1/2 inch drives.
Two common types of seed germination
Major Types of Hydrogen Bonds Found in Biomolecular Interactions
The types of topological interconversions catalyzed by type II topoisomerases
Types of proprioceptors: Muscle Spindles and Tendon Organs