The most accurate method of charging a small appliance that holds less than a lb of refrigerant is to add:
A) Vapor into the low side with the system operating while checking the compressor amp draw.
B) Vapor with the system not operating up to a specified static pressure at a specified ambient temperature.
C) Liquid into the system with the system off until the liquid stops going in.
D) Liquid into the system until the pressure equals the saturation pressure and temperature.
B
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Answer the following statement(s) true (T) or false (F)
One common use for the normally open set of contacts on an overload relay is to provide an input signal to a programmable logic controller (PLC).
The Cooks live in an old plantation house. The upkeep on the house is approximately $1,800.00 per year. The heating and cooling costs approximately $2,500.00 per year. The Cooks then build a new house that costs $185,000. They are able to pay 35 percent down and obtain a loan on the balance at 5.5 percent. They are able to arrange to pay off the principal in equal annual payments over 30 years, and the interest is paid annually on the remaining balance. The heating and cooling will be cut by 78 percent and the upkeep by 92 percent. How does the saving in upkeep, heating, and cooling compare to the interest paid the sixth year?
What will be an ideal response?
Which of these values indicates a neutral pH?
a. 5 c. 7 b. 6 d. 8
Wear blocks are used:
A) To determine the accuracy of optical flats B) To gain additional measuring capacity with the gage block set C) To protect the gage blocks on the ends of the stack from damage by direct contact D) For machine setups involving cutting tools