Why are air flow switches often used in air conditioning and refrigeration circuits?
What will be an ideal response?
Air flow switches are often used in air conditioning and refrigeration circuits to give a positive indication that the evaporator or condenser fan is operating before the compressor is permitted to start.
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Technician A says that ultraviolet light is bright, and very hot. Technician B says that ear protection does not need to be used when welding. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B
Threads that resist vibrations and remain tight without auxiliary locking devices are called ____ threads.
A. buttress B. Acme C. dardelet D. rolled E. none of the above
Angular-contact ball bearings are most often mounted in pairs _____ each other
A) in opposition to B) perpendicular to C) separated from D) staggered from
What are the differences between cellular and ad hoc networks?
What will be an ideal response?