Which of the following is a probable cause of relay-controlled equipment failing to start when the contactor is closed?
a. excessive residual magnetism
b. one contact not closing
c. a grounded coil
d. gummy deposits
b. one contact not closing
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A(n) ____ section is produced by a cutting plane that is parallel to the short axis of the structure and is usually parallel to the materials used to frame the roof, ceiling, and floor systems.
A. transverse B. obverse C. reverse D. longitudinal
Air density increases as altitude increases.
Answer the following statement true (T) or false (F)
95/5 solder should be used ____.
A. on the high side of the system B. on the low side of the system C. when there are extreme changes in pressures and temperatures D. always
The sodium ____________________ ratio (SAR) compares concentrations of sodium ions with the
concentrations of calcium and magnesium ions.
Fill in the blank(s) with the appropriate word(s).