Penetration losses of radio frequency signals occur because of ________
A) resistance and skin effect B) wave diffraction and absorption
C) cross-talk and electromagnetic interference D) propagation losses and multipath effects
B
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A type of fan that is designed for producing high static pressure in a duct distribution system is:
A) Impeller B) Centrifugal C) Axial D) Condenser
PTAC units are
A) Packaged temporary air conditioning units B) Partial temporary air conditioning units C) Partial trajectory air conditioning units D) Packaged terminal air conditioning units
Technician A says the dedicated fixture system is usually a “go or no-go” measuring system. Technician B says the universal mechanical measuring system frequently requires removing several suspension parts prior to securing it to the bench. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B