Why is the capacity of air conditioning units stated in tons?
A) Because early cooling used tons of ice.
B) Air conditioners are not rated in tons.
C) Because the unit capacity is directly related to its weight.
D) Ton is an acronym for "total output nominal" rating.
A
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?Undercut shall not exceed the lesser of ______% of the base metal thickness or ____________.
A. ?10%, 1/32 in. (0.8 mm) B. ?5%, 1/16 in. (1.6 mm) C. ?8%, 3/64 in. (1.2 mm) D. ?3%, 1/64 in. (0.4 mm)
Which component of the refrigeration cycle controls the flow of refrigerant to the evaporator? It also separates the high- and low-pressure sides of the system
A) Compressor B) Evaporator C) Condenser D) Metering device
If a fitting has grooves cut into the flats, this means that it connects to the ____.
A. blowtorch B. regulator C. oxygen system D. acetylene system
Find the total resistance (Rt) of a three-series connected resistors.
A. 
B. 
C. 
D. 