Discuss how it is possible to have a control transformer whose primary winding can be connected to 240 or 208 V and provide 120 V at its secondary
What will be an ideal response?
A control transformer can be wound for a 2:1 ratio that allows 220 V to be dropped to 110 V, or it can be wound for 1.89:1 so that 208 V can be dropped to 110 V.
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What are the dimensions of B5? 3?4??
Refer to Drawing Number 4190487 R0 and answer the following questions.
When a rain cap is used on a vertical exhaust stack, in which direction should the opening flap be pointed?
A. forward B. rearward C. inside D. outside
If you define x = 2/3, and then type format rat, how will the value of x be displayed?
a. x = 0.66666666667 b. x = 0.6667 c. x = 0.67 d. x = 2/3
In the compression refrigeration cycle, the refrigerant is superheated:
A) Leaving the compressor, through the condenser, up to the metering device. B) The refrigerant contains some superheat throughout the cycle. C) The refrigerant is not superheated anywhere in the compression cycle. D) Leaving the evaporator, through the compressor, up to the condenser.