A system that controls loads by opening and closing electrically operated mechanical switches is described as:
A) Pneumatic logic. B) Modulating logic. C) A relay logic. D) Solid-state logic.
C
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A rectangular field is 42 chains by 25 chains. How many hectares are in the field? (Note: 10 sq ch = 1 acre and 1ha = 2.5 acres.)
What will be an ideal response?
The skepticism about authority that emerged in the United States during the 1960s
A. was a new phenomenon for America. B. did not occur anywhere else in the world at that time. C. touched all institutions except religion. D. had deep historical roots in American culture. E. arose from the music and drugs of the time.
Hot-surface igniters are made of:
A) Carbon. B) Nickel-chrome wire. C) Silicon carbide. D) Alnico-chromel wire.
For a building to be properly ventilated:
A) Air must be ducted from the floor to the ceiling. B) A vent hole must be installed in the center of a building space. C) Air must be able to flow and exchange properly throughout the building space. D) Vents should always be installed from the sides of a building structure.