When evacuating a system after leak testing, the technician should use a micron gauge along with the vacuum pump and pump the system down to what level?
A) 1,500 microns B) 100 microns C) 500 microns D) 200 microns
C
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On hip roofs, the cornice is similar on all four sides of the building.
Answer the following statement true (T) or false (F)
The typical start up sequence for a hot surface ignition system is
A) Combustion blower, indoor blower, igniter, and gas valve all energized simultaneously B) Combustion blower energized, igniter energized and gas valve energized, flames sensed, indoor blower energized after time delay C) Combustion blower pre-purge, igniter energized after a delay, gas valve energized after a delay, flames sensed, indoor blower energized after time delay D) Gas valve and igniter energized, flames sensed, combustion blower and indoor blower energized after time delay
What is the maximum memory size of a microprocessor with a 16-bit address bus?
A) 64 Kbyte B) 16 Kbyte C) 32 Kbyte D) 1 Mbyte
A datum identification symbol is indicated within:
A. the feature control box B. a circle C. a modifier box D. a rectangle