In the following equation, what does the x stand for? elastic energy = 1/2 kx^2
a. deflection of a spring from its unstretched position
b. original length of an unstretched spring
c. spring force
d. total length of a stretched spring
a. deflection of a spring from its unstretched position
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A ground fault is described as an unintentional _____.
a. connection between two or more portions of the equipment grounding conductor b. open connection between an electrical circuit or equipment and the earth c. conducting connection between any of the conductors of an electrical system d. electrically conducting connection between an ungrounded conductor of an electrical circuit and the normally non-current-carrying conductors
The risk that the public perceives based on personal feelings is _____ risk
Fill in the blank(s) with correct word
What is a low water cutout?
A) It is an operating control that shuts off the boiler at the end of every operating cycle when it senses that the boiler has used up its supply of water. B) It is a hand valve installed near the bottom of the boiler, which is used for filling and servicing the boiler. C) It is an operating control that energizes the water fill solenoid at the end of an automatic blow-down cycle. D) It is a safety device that shuts off the boiler if the water level is low.
The APWA color code used to mark underground gas lines is _____
a. red b. blue c. green d. yellow