Most switches used for safety controls in HVAC circuits:
A) Are normally closed and wired in series with the load they protect.
B) Are normally open and wired in series with the load they protect.
C) Are normally open and wired in parallel with the load they protect.
D) Are normally closed and wired in parallel with the load they protect.
A
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Refer to Exercise 7. Estimate F, and find the relative uncertainty in the estimate, assuming that g=9.80 
exactly and that
a. d=0.20 m and l=35.0 m, both with negligible uncertainty, and h=4.51 ± 0.03 m. b. h=4.51 m and l=35.0 m, both with negligible uncertainty, and d=0.20 ± 0.008 m. c. d=0.20 m and h=4.51 m, both with negligible uncertainty, and l=35.00 ± 0.4m.
Another common name for lineman pliers is _____
a. locking pliers b. tongue-and-groove pliers c. needle-nose pliers d. side cutters
Cutting plane lines are labeled and the labels refer to the sectional view.
Answer the following statement true (T) or false (F)