____ helps the weld by protecting the hot metal from the effects of the atmosphere.
A. Slag
B. Heat
C. Oxides
D. Gas-forming agents
Answer: A
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____ are used where electricians strip a conductor and push it into the hole rather than terminating on the screws.
a. Push-in terminals b. Strip gauges c. Conductor sizeups d. Conductor material markings
The most likely result of field design modifications to equipment is
A) Increased equipment life B) Improved performance and efficiency C) Reduced capacity and efficiency D) Lower operating cost
Which of the following statements is TRUE about a Grade 1 fuel oil?
A) The oil consists of 1 percent sulfur. B) The oil consists of 1 percent carbon. C) The oil consists of 100 percent light distillates. D) The oil consists of 100 percent residuals.
Which type of air handler would be best suited for attic installation?
A. vertical upflow B. vertical downflow C. horizontal