El punto donde la sección curvada del extremo de un tanque se une con la pared recta es:
a. el punto convexo.
b. la tangente.
c. el radio.
d. la unión.
b. la tangente.
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A transformer-supplied system operating at less than 50V must be grounded if the supply voltage to the transformer exceeds _____.
a. 24V b. 50V c. 120V d. 150V
A rectangular deck is to be constructed. The length of the deck is to be 
feet longer than the width and the deck is to contain 275 square feet. Determine the required length and width. Note: Area of a rectangle = length × width.
Fill in the blank(s) with the appropriate word(s).
Describe how a tap is used.
What will be an ideal response?
What is the purpose of shutoff valves in the water loop of a water-source heat pump?
A) They allow you to service a water-source unit. B) They are used to shut off different loop zones in a zoned loop system. C) They allow water pressure to build. D) They keep water inside the piping system.