Addenda are bulletins of additional information that are germane to the contract documents issued during the bid period.
Answer the following statement true (T) or false (F)
True
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In this drawing of a radiator cap, what is occurring within the cooling system?
A) The system is cooling down
B) The system is overheating
C) Coolant is returning to the radiator
D) Both A and C
Describe yolk, and give its function
What will be an ideal response?
Based on the latest industry standards; must the oil be changed in a hermetic compressor on a close-coupled reach-in unit when retrofitting R12 with R401A?
a. Yes, you must always change from mineral oil to alkylbenzene on a retrofit. b. No, because it has been found that the oil will actually return to the compressor. c. It depends on what refrigerant you are using to retrofit the unit.
In the feedback system in Figure E.22, graph the response of the system to a unit step, for the time period, 0 < t < 10, then write the expression for the overall system transfer function and draw a pole-zero diagram, for the given values of K.
(a) K = 20
(b) K = 10
(c) K = 1
(d) K = ?1
(e) K = ?10
(f ) K = ?20
