Explain why leak testing a system is often one of the most difficult tasks a service technician can face.
What will be an ideal response?
The leak can be anywhere along the piping circuit. Often, the entire piping arrangement is not accessible, making the process difficult. Leaks can be present deep within the heat transfer coils, such as the evaporator or condenser, or they can be located behind sealed walls and ceilings.
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To help isolate a clogged or dirty injector:
A. Check the resistance of each injector. B. Use a noid light to check for a signal from the computer. C. Perform an injector balance test. D. Both A and C
In Varying Viewpoints: What Was the True Nature of Slavery, the contemporary historian Eugene Genovese agrees with previous historians of American slavery that
A. this southern institution embraced a form of economic paternalism which reflected the need of southern slaveholders to control and coax labor out of their reluctant and recalcitrant "investments." B. southern slaveholders actually treated slaves with a kindly and caring paternalism throughout the lives of most slaves. C. blacks were inferior and submissive by nature,facilitating their participation in the institution of southern slavery. D. blacks did not abhor the coercive social and economic institution that enslaved them. E. this southern institution was not underpinned by racist attitudes by southern slaveholders and most other southerners as well.
The normal fluid temperature drop through a glycol coil on a secondary cooling loop is:
A) 20°F. B) 15°F. C) 5°F. D) 10°F. Match the rack system components with their functions.
A ____ is a useful tool to provide support while sketching and placing field notes.
A. flashlight B. camera C. ladder D. clipboard