What must be done when charging a zeotropic refrigerant into an operating system?

a. Charging by superheat.
b. Charging liquid through a metering orifice on the low-pressure side.
c. Inverting the refrigerant cylinder.
d. Adding charge only through the high-pressure side.


b

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One method of identifying and diagnosing performance discrepancies is to _____.

a. conduct a cost analysis of the rework b. isolate the root cause of the problem c. reschedule equipment maintenance d. provide feedback to the employee

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Describe saline and sodic soils

What will be an ideal response?

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Technician A says that an attendant must be present any time a pyrolytic oven is used. Technician B says that aluminum parts should be cleaned at a temperature greater than 600°F. Which technician is correct?

A) Technician A B) Technician B C) Both technicians D) Neither technician

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List at least three different joint designs that could be used when performing a frame sectional replacement, and briefly describe how each is made.

What will be an ideal response?

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