In a flexible gate valve, the best way to prevent water from collecting in the body neck is _____.
a. allowing long rest periods
b. using a gate valve to regulate flow
c. restricting flow to the valve slowly when shutting the system down
d. following correct warming-up procedures
d. following correct warming-up procedures
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What size copper thermostat wire is typically sufficient up to 100' (30 m)?
a. 14 AWG b. 18 AWG c. 22 AWG d. 24 AWG
Crossing a sire with a daughter is an example of linebreeding
Indicate whether this statement is true or false.
If the primary coil is energized in a transformer, what happens in the secondary coil if it is connected into a closed circuit?
A. nothing until it too is powered up B. current flow is induced C. nothing until the secondary circuit is open D. nothing until primary coil de-energizes
Urban soils generally contain no organic matter, but may have bits of broken glass and other human debris
Indicate whether the statement is true or false