The combination of metal and water weight gives cast-iron boilers the ability to absorb a significant amount of heat. Such boilers are said to have a high ____.
a. life cycle
b. thermal mass
c. efficiency factor
d. size
b. thermal mass
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? The Beatles
What will be an ideal response?
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8
= __________.
Fill in the blank(s) with the appropriate word(s).
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Which refrigerant is used in most truck air conditioning systems?
A. R-12 B. R-22 C. R-502 D. R134a
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The reciprocal of the pitch in inches is the ____.
A. depth of thread B. included angle C. number of threads per inch D. pitch diameter E. none of the above
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