In a forced hot-water heating system, the thermal circulation of water is prevented by _____
a. using small diameter water return lines
b. using large diameter water return lines
c. isolating the circulating pump
d. placing a check valve in the water return line
d
You might also like to view...
Thomas Jefferson distrusted large standing armies because they
A. were usually ineffective in battle. B. always developed a destructive rivalry with the navy. C. could be used to establish a dictatorship. D. were contrary to Article II of the Constitution. E. would be made up of citizen soldiers.
____________________ motor stators have coils of wire placed around the circumference of the stator core, which form electro-magnets when energized, and create magnetic pole fields.
Fill in the blank(s) with the appropriate word(s).
What is the correct way to set bulbs into a planting hole?
What will be an ideal response?
A pharmaceutical is a cosmetic substance used to enhance a person's life
Indicate whether the statement is true or false