Which terminal controls the reversing valve on most heat pumps?
A) W terminal B) O/B terminal C) Y terminal D) G terminal
B
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What is the correct procedure and material used to weld a hardened truck frame rail extension into position?
A. MIG with general purpose wire B. TIG with high alloy steel rod C. Electric arc with AWS E-11018 electrode D. Electric arc with AWS E-6011 electrode
The primary (low-voltage) ignition system must be working correctly before any spark occurs from a coil. Which component is NOT in the primary ignition circuit?
A) Ignition switch B) Pick up coil C) Spark plug wires D) Ignition module
The purpose of controls in an HVACR system is to:
A) Protect the refrigeration cycle components. B) Regulate HVACR equipment in response to monitored conditions. C) maintain the temperature in a space. D) Start and stop all the electrical components.
?Desuperheaters transfer more than 60 percent of the total thermal energy in the hot refrigerant gas leaving the compressor to domestic hot water.
Answer the following statement true (T) or false (F)