The voltage drop in the power wire is checked by:
A) Reading the voltage before the unit starts and comparing it to the nameplate voltage.
B) Comparing the supplied voltage with the unit off to the voltage with the unit operating.
C) Reading the voltage after the unit starts and comparing it to the nameplate voltage.
D) Comparing the minimum and maximum allowable operating voltages on the unit data plate.
B
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Job-built forms for square or rectangular columns are built of plywood sheets and battens of _____.
a. 2" × 8" lumber b. 2" × 6" lumber c. 2" × 4" lumber d. 2" × 2" lumber
What may happen if a lithium-bromide absorption system is started with the cooling water too cold?
A. High head pressure in the system. B. Low head pressure in the absorber. C. Removal of system load, compressor cylinders will unload. D. Crystallization occurs.
Technician A says that electronic conductance testing can determine CCA, state-of-charge, and voltage of the battery. Technician B says that electronic conductance testing determines if there is a bad cell and the battery is not serviceable and should be replaced. Who is right?
A) Technician A only B) Technician B only C) Both A and B D) Neither A nor B
The heat transfer process in which warm air rises and cool air falls is _____
A) convection B) radiation C) conduction D) transference