What are the sources of refrigerant system contamination?
What will be an ideal response?
Cross-contamination by another refrigerant, sealant contamination, air (noncondensible gas), moisture, mixed refrigerants, hazardous refrigerants
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A steel forging in the shape of a regular pyramid weighs 214.5 pounds. The base of the pyramid is a square with 7.71-inch sides. Compute the height of the forging to the nearest tenth of an inch. The steel in the forging weighs 490.5 pounds per cubic foot.
What will be an ideal response?
Technician A says that Siemens HEUI uses a horizontal actuator spool. Technician B says that the HEUI actuator spool linear movement is vertical. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Diurnal amphibians need _____
a. full spectrum lighting b. bulbs that produce black light c. bulbs that produce red light d. very little artificial light
Which two animals are responsible for the majority of zoonoses?
What will be an ideal response?