In a heat reclaim system, the vapor line carrying hot refrigerant vapor to the heating coil is connected to the ____.
A. liquid line
B. hot gas line
C. suction line
D. compressor line
Answer: B
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?Ultraviolet treatment may improve such surface characteristics as resistance to ____.
A. ?stress cracking B. ?chemicals C. ?abrasion D. ?weather
PROBLEM 2.41 A brass bolt (Eb = 15 ? 106 psi) of -in. diameter is fitted inside a steel tube (Es = 29 ? 106 psi) of -in. outer diameter and -in. wall thickness. After the nut has been fit snugly, it is tightened one-quarter of a full turn. Knowing that the bolt is single-threaded with a 0.1-in. pitch, determine the normal stress (a) in the bolt, (b) in the tube.
In a step-down transformer with a 4.16kV primary delta connection and a 480/277V wye secondary, the transformer turns ratio is _____.
a. 5:1 b. 9:1 c. 11:1 d. 15:1
Is it necessary to install all interceptors so that they are readily accessible?
What will be an ideal response?