Los aparatos de iluminación tipo C de la Figura 1 tienen la letra R junto a las cajas de salida. De acuerdo con los símbolos eléctricos del ANSI (American National Standards Institute: Instituto Nacional Estadounidense de Estándares), R significa que los _____.
a. aparatos de iluminación se elevan hasta la superficie del techo terminado
b. aparatos de iluminación están empotrados
c. los aparatos de iluminación son resistentes al polvo
d. lentes son de color rojo
b. aparatos de iluminación están empotrados
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Follow the steps of the Systematic Approach of Section 14.4—that is, (1) identify the system, (2) determine whether the process is batch or rate, (3) construct a schematic diagram with inputs and outputs, (4) Label known material quantities or rates of flow and so on. A solution of potassium chromate (K2CrO4) is to be used to produce K2CrO4 crystals using an evaporator and crystallizer/filter. A 38 percent solution is fed to the evaporator. The stream leaving the evaporator is 48 percent K2CrO4 and is fed to the crystallizer/ filter. Pure K2CrO4 crystals are produced and the remaining solution is 44 percent K2CrO4. This solution is cycled back to the evaporator. If 1.2 t/h of pure crystals are needed, calculate the total input to the evaporator, the feed rate to the
crystallizer/filter, and the water removed from the evaporator. What will be an ideal response?
You have just drilled and reamed a .250 inch diameter hole. In order to check the size, the best tool would probably be a:
A) Dial bore gage B) Small hole gage C) Telescoping gage D) Dial test indicator
Ignition coil primary resistance is usually ________ ohms
A) 6,000-30,000 B) Zero C) 150-1500 D) Less than 1 to 3
If an MVM source is 48h and its mask is 1Fh, then after the MVM instruction is executed, ________ is stored in the destination
A) 4Fh B) 08h C) 18h D) 48h