What is the most commonly used anti-freeze for geothermal systems which require antifreeze?
A) propylene glycol B) methyl alcohol C) ethylene glycol D) glycerine
A
Trades & Technology
You might also like to view...
Most electrically driven constant-speed machines operate at speeds below ____ rpm.
A. 1800 B. 2000 C. 2200 D. 2400
Trades & Technology
Beside normal seal wear, what could cause positive-type valve guide seals to fail prematurely?
What will be an ideal response?
Trades & Technology
Express 210 centimeters as feet and inches rounded to the nearer thousandth if necessary.
Fill in the blank(s) with the appropriate word(s).
Trades & Technology
To pull a vacuum means to ____.
A. raise the pressure in a refrigeration system B. lower the pressure in a refrigeration system below atmospheric C. allow refrigerant to escape into the atmosphere D. condense the gas in the system
Trades & Technology