What is the minimum desired return water temperature for a gas fired boiler?
A) at least 180°F returning to the boiler B) at least 80°F returning to the boiler
C) at least 140°F returning to the boiler D) at least 100°F returning to the boiler
C
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If the individual wires in adjacent strands of a rope change direction, with the wires following the lay of the strand in one while opposing the lay of the adjacent strand, the rope has a(n) _____.
a. right lay b. regular lay c. alternate lay d. lang lay
What are the main components of the three-phase AC induction motor?
What will be an ideal response?
For a more natural effect, the shape of the nail should conform to the:
What will be an ideal response?
According to Kirchhoff?s voltage law, the total voltage drop in a circuit is equal to the _____
a. voltage of the power source b. total resistance in the circuit c. current divided by resistance d. total current in the circuit