When one side of the secondary winding of a control transformer is grounded, the control system is referred to as a(n) ____________________ system.
Fill in the blank(s) with the appropriate word(s).
ANSWER: grounded
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When plants are grown under high-light intensities, they are generally shorter and darker green than plants grown under low-light intensities
Indicate whether the statement is true or false
Some soil colloids exhibit positive charges under highly acid conditions. To what are these charges likely due?
A) the release of some OH- ions leaving an unsatisfied positive charge on the colloid B) the adsorption of Al3+ ions on the colloid C) protonation of some hydroxy groups by excess H+ ions D) increase in the level of H+ ions on the exchange complex E) substitution of lower valent atoms for higher valent atoms in the octahedral sheet
A modulating control:
A) Can be used with any voltage by adjusting the modulator setting. B) Is mainly an off-and-on type of control. C) Can position a damper or valve to positions other than full open or closed. D) Can modulate mechanical signals to wireless frequencies for remote control.
Certain line weighs and configurations denote various types of _________.
Fill in the blank(s) with the appropriate word(s).