The ____________ also allow the motor to soft start and to coast down without just shutting the motor off.
Fill in the blank(s) with the appropriate word(s).
VFD's
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Which of the following best describes continuity monitoring?
a. Initiates an alarm when the current in the heat-tracing circuit is too low or too high b. Measures the temperature of the pipe with a digital controller connected to an RTD c. Monitors the current leakage from the system heating cable, power wiring, and components to ground d. Verifies that voltage is present at the end termination of a heat-tracing cable run
Parasitoids (ladybugs and spiders) are specialized insects that develop as larvae within the body of the host and eventually kill it
Indicate whether the statement is true or false
An example of a sugar crop is:
a. soybean c. corn b. wheat d. alfalfa
When troubleshooting an induced-draft gas furnace, what should be checked if the induced-draft fan comes on but the igniter is never energized?
A) Check the microamp signal of the flame sensor. B) Check the control transformer. C) Check the draft pressure switch to see if it is closed. D) Check the incoming gas pressure.