RETA CARO Chapter 1 Exam Questions With Verified Solutions

RETA CARO Chapter 1 Exam Questions With Verified Solutions Purpose of a Refrigeration System Achieve or maintain proper temperatures in a refrigeration process used for cooling/freezing applications Ton of Refrigeration Rate BTUs transfer per unit time 288,000 BTUs/24 Hours 12,000 BTUs/12 Hours 200 BTUs/1 Minute rate of refrigeration or cooling Pressure Force per unit area. PSIA Absolute pressure; measures pressure from zero pressure PSIG Gauge pressure, uses atmospheric pressure as the zero point (14.7psia); 0PSIG = 14.7PSIA Temperature Measure of the intensity of the heat energy in an object or space Fahrenheit to Celsius F=1.8(C)+32 Heat A form of energy measured in BTUs BTU British Thermal Unit; the amount of heat required to change the temperature of one pound of pure liquid water, one degree Fahrenheit Heat Quantity Quantity of heat, measured in BTUs, depends on the mass of an object Sensible Heat heat energy that causes a change in temperature, can be sensed on a thermometer, does not change state Latent Heat heat energy that causes a change in state, cannot be measured with a thermometer Latent Heat of Fusion heat energy moving into or out of a