When copper is being brazed to steel _____.
a. the technique is identical to brazing copper to copper
b. more heat is applied to the steel fitting
c. a filler metal with a high phosphorus content is best
d. a filler metal with a high silver content is used
d. a filler metal with a high silver content is used
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A(n) ____________________ is the same type of device as a contactor in terms of the ampere rating of the device, but it has a means of overload protection in it.
Fill in the blank(s) with the appropriate word(s).
Which of the following are important things to be considered when selecting a container for shrubs and trees?
A) Appearance B) Cost C) Insulation value D) All of the above
For each situation below, determine (1) if the variable(s) is(are) discrete or continuous, and (2) if the information involves certainty, risk, and/or uncertainty.
(a) A friend in real estate tells you the price per square foot for new houses will go up slowly or rapidly during the next 6 months. (b) Your manager informs the staff that there is an equal chance that sales will be between 50 and 55 units next month. (c) Jane got paid yesterday and $800 was taken out in income taxes. The amount withheld next month will be larger because of a pay raise between 3% and 5%. (d) There is a 20% chance of rain and a 30% chance of snow today. (e) The first cost of a new front-end loader is $34,000 or $38,000 depending on the size purchased.
A single-phase electrical device in a building draws 37 A and is supplied with two type THWN copper wires in a conduit. The conduit is run up through the cores of concrete blocks in a building. The wire ampacity is to be sized at 125% of the 37 A, which is 46.25 A. The minimum size of wire permitted is AWG number ____.
A. 4 B. 6 C. 8 D. 10