Which refrigerant will likely become scarce after the year 2020?
a. HCFC-123
b. HFC-410A
c. HFC-134a
d. Ammonia
a
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Explain the purpose of the sealer on the outside surface of a seal housing.
What will be an ideal response?
Handheld fiber optic meters with white light polarization interferometry are useful for measuring temperature, pressure, and strain in electrically noisy environments. The fixed costs associated with manufacturing are $800,000 per year. If variable costs are $290 per unit and the company sells 4000 units per year, at what selling price per unit will the company break even?
What will be an ideal response?
A _____ is a type of electrical panel that contains the main disconnecting means for the residential service entrance as well as the fuses or circuit breakers used to protect circuits and equipment like electric water heaters, ranges, dryers, and lighting.
a. safety switch b. load center c. subpanel d. meter socket
The total voltage in a circuit with voltage drops of 15V, 25V, and 20V is _____
a. 20V b. 60V c. 120V d. 180V