An exposed grid ceiling system uses the _____ as the primary support members of the grid system
a. main runners
b. 4' cross tees
c. wall angle
d. 2' cross tees
a
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Which of the following motors is used when the required starting torque is high and speed control is desirable?
a. Brushless b. Compound c. Series d. Shunt
____ has the poorest heat resistance and electron emission characteristic of all the tungsten electrodes.
A. Lanthanum tungsten B. Pure tungsten C. Zirconium tungsten D. Thoriated tungsten
Reciprocating chillers have crankcase heaters to ____.
A. preheat the chilled water for better efficiency B. prevent refrigerant migration to the crankcase C. preheat the compressor bearings for longer wear D. minimize condenser subcooling
In the accompanying figure, provide a brief description of the process for the symbol identified as number 2.
What will be an ideal response?