List the variables that affect system pressures
What will be an ideal response?
Outdoor ambient temperature for air-cooled units
Condenser airflow for air-cooled units
Inlet water temperature for water-cooled units
Condenser water flow for water-cooled units
Return air wet bulb for air conditioners
Evaporator airflow for air conditioners
Returning water temperature for chillers
Chilled water flow for chillers
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If the current position (x,y,z) coordinates are (4,6,7.5) which of the following would result in a rapid move to (2,7,7.5):
A. G00 G91 X-2 Y1 Z0 B. G01 G91 X-2 Y1 Z0 C. G00 G90 X2 Y7 D. G00 G90 X-2 Y1 E. both a and c are correct F. both b and d are correct
The sensor that must be warmed and functioning before the engine management computer will go to closed loop is the ________
A) O2S B) BARO sensor C) Engine MAP sensor D) ECT sensor
What does an orifice plate use to create a measurable pressure drop?
a. Pressure taps b. A movable pressure plate c. A fixed-area restriction d. Variable vanes on a plate
Roofs with a slope of less than ________ are flat by code standards and weatherproofing with standard asphalt shingles is not code-approved
A) 2/12 B) 4/12 C) 1/12 D) 5/12