The invention of the ____________________ brought about a revolution in the way foods are preserved
Fill in the blank(s) with correct word
refrigerator
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In determining the fire-resistance rating of an assembly through ASTM E119 test, which of the following properties of the assembly are investigated?
A) Occurrence of cracks in assembly during the fire B) Change of color of assembly during the fire C) Structural integrity during the fire D) (a) and (b) E) (a) and (c)
Ohm's law is a mathematical formula that describes the relationship between:
A) Volts, amps, and ohms. B) Watts, volts, and amps. C) Volts, amps, ohms, and watts. D) Ohms, watts, and volts.
Transformer open circuit (OC) and short circuit (SC) tests allow us to calculate certain equivalent circuit values. Which parameters are calculated from the OC test and which are from the SC test?
A. The OC test gives the resistances and the SC test gives the reactances B. The OC test gives the series impedance and the SC test gives the shunt admittance C. The OC test gives the shunt admittance and the SC test gives the series impedance D. The OC test gives the voltages and the SC test gives currents
As the diameter of the filler wire is decreased, the heat absorbing effect ____, and the molten weld pool becomes ____.
A. increases, deeper B. decreases, wider C. decreases, deeper D. increases, shallower