CWDM systems are easier to cost justify due to the greater/less spacing between channels
A) Greater B) Less
A
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Which of the following backflow protection methods cannot be used on continuous pressure applications?
a. air gap b. reduced pressure zone backflow preventer c. atmospheric-type vacuum breaker d. none of the above
In reciprocating and scroll type motor-compressor assemblies, the motor is cooled by ____.
A. air over the shell of the assembly B. discharge gas from the compressor C. suction gas returning to the compressor D. liquid refrigerant by-passed from the liquid line
__________ is the amount that must be subtracted from a desired stub-up height so the bend will come out right.
a. Sweep b. Stub height c. Saddle mark d. Take-up
Edge-triggered flip-flops must have ________
A) at least two inputs to handle rising and falling edges B) active-low inputs and complemented outputs C) very fast response times D) a pulse transition detector