What component is used to compensate for different pressure drops and load requirements?
A) Venturi units B) Return pump C) Balancing valves D) Check valve
C
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How many blower motors does a window air conditioner have?
A) Two - an evaporator fan motor and a condenser fan motor. B) One - a single double-shafted blower motor is used for both the evaporator and condenser fans. C) Two - a low-speed blower motor and a high-speed blower motor. D) None - window air conditioners do not require a blower motor because they are not connected to a duct system.
A conventional lead acid battery will have this many cells:
a. 2 b. 6 c. 12 d. 24
_____ were first imported to the U.S. in the late 1800s.
Fill in the blank(s) with the appropriate word(s).
The three-phase bridge rectifier is often used for industrial applications because it has less ____ than the half-wave rectifier.
a. drain b. resistance c. inversion d. ripple