The ____ valve is recommended for applications where small pressure drops across its restrictor is desired.
A. single-seated
B. double-seated
C. three-way
D. butterfly
Answer: D
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Sealants, the wrong dye, and flushing agents are all bad for air-conditioning systems.
Answer the following statement true (T) or false (F)
____ is commonly used for tools and weapons
A) Zinc B) Copper C) Lead D) Mercury
As with the PN junction diode, the ____ of an LED is usually connected to the negative side or ground in a circuit.
a. anode b. cathode c. depletion area d. DMM
What is a hydronic terminal unit?
A) The coils and devices that heat the building B) A reverse return loop that is installed on the end of a hydronic run C) Terminal units are specifically designed for use in airports and train stations D) The last convector in a hydronic loop is called the terminal unit