Industrial refrigeration (RETA) Ch. 1 Questions with correct answers

Industrial refrigeration (RETA) Ch. 1
Questions with correct answers

D - correct answer ✔✔ Which of the following factors listed below does not affect heat
transfer?



A. Temperature difference



B.surface area



C.thermal conductivity



D. density



C - correct answer ✔✔ An example of a poor conductor?



A. Aluminum tubing



B. schedule 40 steel pipe



C. wood



D.water



B - correct answer ✔✔ Thermal conductivity ('k') is...

, A. Exactly the same value for any metal



B.the number of BTUs that will pass in one hour through a material 1" thick with an area of 1ft
squared if the temperature difference from one side to the other is 1 degrees Fahrenheit



C. A measure of the total energy ( heat content) per pound of refrigerate measured in BTUs



D.a relationship between heat and temperature that is useful in determining discharge
temperatures. It is the heat moved into or out of the process, divided by the absolute
temperature in BTUs/POUND/degree R.



A - correct answer ✔✔ Which is not a common source of fouling of heat exchange surface?



A.water



B.oil



C.frost



D.dirt



A - correct answer ✔✔ Which statement is true?



A.the higher the 'k' factor, the greater the thermal conductivity



B.the lower the 'k' factor, the greater the thermal conductivity