What is the purpose of a filter status differential pressure switch?
What will be an ideal response?
This switch triggers an alarm when the filters become dirty.
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What is the numerical aperture of a light source?
What will be an ideal response?
Which of the following is the most likely cause of frost & icicles on a walk-in freezer’s fan blades and fan guards, but the evaporator coil is clear of ice?
a. The drain line is frozen and ice backed up into the evaporator coil. b. The defrost termination on the time clock is bad and won’t go into defrost. c. The fan delay control in the evaporator is stuck closed.
Bent foot is also known as ________ foot
A) angular soft B) offset soft C) induced D) squishy
Preventive maintenance must be performed according to ________ and warranty requirements
A) federal regulations B) documentation from the historical file C) company standards D) the manufacturer's instructions