Once in the roundabout, drivers travel:
a. in a counter-clockwise direction
b. in a clockwise direction
c. in both directions
Answer: a. in a counter-clockwise direction
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What kind of pumps are most used in HVAC applications, e.g., chilled water?
A) Centrifugal. B) Gear. C) Axial. D) Turbine.
The purpose of a steam plant economizer is to _____.
a. preheat the boiler feedwater b. raise steam supply temperature c. reduce unnecessary steam loads d. heat the boiler flue gas
When it is necessary to reinforce a C-channel truck frame rail, all of the following practices are recommended EXCEPT?
A. reinforcement material should match the tensile strength of the frame rail B. reinforcement plates should be angled and radiused to avoid sudden changes in SM C. reinforcements should be welded to the frame rail D. reinforcements can be added to either the outside or the inside of the frame
If you vent the low side of a DP pneumatic transmitter to atmosphere and apply 50" H2O pressure to the high side, the differential pressure is _____
A) 3 psi B) 15 psi C) 50" H2O D) -50" H2O