The ____ is a measure of a fuel’s ability to resist detonation.
a. octane rating
b. oxygen rating
c. methane rating
d. sulfur rating
a. octane rating
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A menos que se indique de otro modo, los cálculos en circuitos de CA generalmente utilizan valores______.
a. de pico b. promedio c. de fase d. rms
The most popular wild breed of duck used in commercial production is the:
A. Wood B. Ring-necked C. Mallard D. Chinese crested
In the compression refrigeration cycle, the refrigerant is superheated:
A) Leaving the evaporator, through the compressor, up to the condenser. B) The refrigerant is not superheated anywhere in the compression cycle. C) The refrigerant contains some superheat throughout the cycle. D) Leaving the compressor, through the condenser, up to the metering device.
When using a recovery device manufactured after November 15, 1993, the recovery level for Type I appliances is:
A) 80 percent of the system charge if the compressor is nonoperational, 90 percent if the compressor is operational. B) 80 percent of the system charge. C) 0 psig. D) 80 percent of the system charge if the compressor is operational, 90 percent if the compressor is nonoperational.