A short-radius ell has a bend radius _____.
a. equal to 11/2 times the pipe OD
b. of 11/2 times the nominal pipe size
c. of one-half the nominal pipe size
d. equal to the nominal pipe size
d. equal to the nominal pipe size
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The average energy gain of a PV system when using ____________________ is 10% or more.
Fill in the blank(s) with the appropriate word(s).
Aqueous-based cleaning means ________
A) Strong chemical-based B) Water-based C) Abrasive-based D) All of the above
Two technicians are discussing the DC coupling setting on a DSO. Technician A says that the position allows both the DC and AC signals of the waveform to be displayed. Technician B says that this setting allows just the DC part of the waveform to be displayed. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
The thermal conductivity of a solid material can be determined using a setup similar to the one shown in the accompanying figure. The thermocouples are placed at 2.5 cm- intervals in the known material (copper alloy, K=52W/m·K) and the unknown sample as shown. The known material is heated on the top by a heating element, and the bottom surface of the sample is cooled by running water through the heat sink shown. Determine the thermal conductivity of the unknown sample for the set of data given in the accompanying table. Assume no heat loss to the surroundings and perfect thermal contact at the common interface of the sample and the copper.
