Most switches used for safety controls in HVAC circuits:
A) Are normally open and wired in parallel with the load they protect.
B) Are normally closed and wired in parallel with the load they protect.
C) Are normally closed and wired in series with the load they protect.
D) Are normally open and wired in series with the load they protect.
Question 2
One advantage relay logic systems have over solid-state logic systems is that:
A) They can control more functions. B) They consume less power.
C) They are not affected by noisy power signals. D) They are faster.
Oral cavity: (A) sagittal section; (B) anterior view as seen through the open mouth.
Critical thinking model for safety evaluation
Capuchins use stones to crack open palm nuts in much the same way that chimpanzees in some populatio
One type of safety needle withdraws into a protective sheath when the injection is complete.
Washing hands and removing jewelry are two important safety habits all service technicians ...
Use a rubber finger cot to cover an open wound on a finger.