What is the resonant frequency of a tank circuit with a 50 mH inductor and C = 256 pF capacitor?
A) 445 kHz B) 44.5 kHz C) 44.5 Hz D) 4.45 kHz
B
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For an evaporator to operate at peak efficiency, _____.
a. the fin spacing should be very wide b. all of the surface area inside the tubes must be exposed to flashing liquid c. the coil temperature should always be higher than the dew point of the air d. the subcooling of the entering refrigerant should be kept to a minimum
The heat of combustion is the energy given off when a substance is burned in the presence of oxygen
Indicate whether the statement is true or false.What makes a battery "low maintenance" or "maintenance free"?
A) The electrolyte is hydrochloric acid solution B) The battery plates are smaller, making more room for additional electrolytes C) The alloy used to construct the grids D) The plates are constructed of different metals
What is the most perishable of all the animal foods?
A) Pork B) Seafood C) Poultry D) Beef