When adding a specific amount of refrigerant to a new system, how do you measure the amount of refrigerant added?
A) Use a digital scale to remove refrigerant until a negative number registers.
B) Use a digital scale to register change as the refrigerant exits the cylinder.
C) Use a digital scale to register change as you add refrigerant to the cylinder.
D) Use a digital scale to weigh the refrigerant cylinder.
B
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Nurseries sometimes start growing their plants to sell from small plants called _____
a. Liners c. rootings b. stock plants d. media
Unvented roofs are also referred to as ____ roofs.
A. cold B. simple C. dry D. hot
After equipment selection and installation, the next most important factor in having an effective maintenance program is the maintenance ____________________.
Fill in the blank(s) with the appropriate word(s).
In a transistor, the barrier voltage is produced across the ____ junction.
A. emitter-base B. collector-base C. collector-emitter D. emitter-external voltage