When discussing sheet sizes, if the horizontal dimension size is larger than the vertical size, the paper orientation is known as ____.
A. A4
B. landscape
C. portrait
D. A0
Answer: B
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Answer the following statement(s) true (T) or false (F)
1. Once a few basic principles are understood, reading schematics and wiring diagrams will become as easy as reading a newspaper. 2. A normally closed pushbutton is drawn with the movable contact above the stationary contact. 3. Schematics are generally harder to read and understand than wiring diagrams. 4. It is generally necessary for the service person to determine the meaning of the lines on a particular schematic. 5. Load contacts are large and designed to carry the current needed to operate the load.
Semiconductors have how many electrons in their valence rings?
A) More than four B) Four C) Less than four D) None of these
Most NEMA-rated general purpose motors have an overcurrent trip class rating of _____.
a. Class 10 b. Class 20 c. Class 30 d. Class 40
Systems with fixed-restriction metering devices are critical to charge because:
A) You must weight both the system and the refrigerant. B) They can only be charged one time. C) The large liquid receivers hold so much refrigerant. D) The expansion device cannot adjust to changing conditions.