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
d. Verifies that voltage is present at the end termination of a heat-tracing cable run
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In an amusement park, wireless devices are used to post the queue length and wait time for each of the rides. Can you think of an infrastructure that could enable patrons to do online interaction? Assume appropriate requirements and a potential solution.
You do need some forms of authentication and encryption. What are the most important parameters you would be concerned with? Explain clearly.
In regard to the firing of the SCR or the gate control, the ____________________ control method is the least costly control scheme and provides the least amount of control.
Fill in the blank(s) with the appropriate word(s).
Humus indirectly affects plant growth through its effects on soil physical and chemical properties, but humic substances have not been shown to affect plant growth processes directly
Indicate whether the statement is true or false
Combining pure oxygen with a burning material causes a fire to _____
a. burn rapidly and violently b. pop loudly and extinguish c. die down and then flare up d. burn cooler and more slowly