To safely increase the pressure in a refrigerant cylinder while charging a system, the technician should:
A) Run warm water over the cylinder.
B) Heat the top of the cylinder with a small propane torch.
C) Heat the bottom of the cylinder with a small propane torch.
D) Immerse the cylinder in a tub of boiling water.
A
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One of the major photosynthetic enzymes in plants is ribulose-diphosphatase
Indicate whether the statement is true or false
Mature male insects are irradiated in the laboratory to:
a. eliminate their ability to reproduce b. prevent their digestive tracts from digesting plant material c. help them pollinate more trees d. stop them from spreading disease
A vehicle using ethanol-based fuel produces less ________ as an exhaust emission
A) CO B) CO2 C) O2 D) H20
When plumbing and leveling a window in a rough opening, ________ is/are used to adjust the frame until it is square
A) Flashing B) Vinyl tape C) Drip caps D) Shims