It is important to the HVACR technician to understand the changes of state of matter because:
A) NATE certification exams require a good understanding of the Periodic Table of Elements.
B) The refrigerant recovery process requires a technician to know which state the matter is in to ensure that only like refrigerants are put into a recovery container.
C) Technicians are required to mix refrigerants to attain proper pressures and temperatures when charging refrigeration systems.
D) The cooling and heating process requires a change of state of matter in some form.
D
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If a crew of masons is needed to lay 1,000 concrete blocks, and the estimator determined that two masons could complete the job in one eight-hour day, what is the estimated productivity rate for block laying?
a. 125 blocks per hour b. 62.5 blocks per hour c. 31.25 blocks per hour d. 16 blocks per hour
Which of the following components would be associated with a variable geometry turbocharger?
A. wastegate B. pyrometer C. liquid cooling D. charge air cooling
In eastern growing areas, strawberries are almost always picked with a 3/4-inch stem attached
Indicate whether the statement is true or false
There are ____ different methods by which the total resistance of a parallel circuit may be computed.
a. two b. three c. four d. five