Describe how NPSH and NPDH affect the operation of Pump-202.
What will be an ideal response?
A centrifugal pump requires sufficient NPSH in order to operate. If the discharge out runs the suction volume the pump will cavitate. The NPDH provides a medium for the pump to push against and remain liquid full. Variations in the NPDH will cause the pump performance to change. Too much NPDH will stop flow, while too little will cause suction problems.
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Never assume that a ____________________ indicated means a part must be replaced.
Fill in the blank(s) with the appropriate word(s).
C) In general, HVAC loads will be higher for the smaller buildings than the large one. D) More occupants will have access to daylight and views in the multiple buildings.
A) There is no glare due to direct solar radiation. B) Statistically, most good views are in the north. C) Solar heat gains are lower than other orientations. D) North winds are milder in the winter.
Which instrument should be used to verify that there is power available to run a three-phase motor that will not start?
a. Clamp-on ammeter b. Megger c. Ohmmeter d. Voltage tester
The _____ on each scale separates the inches from the feet on the architest's scale.
Fill in the blank(s) with the appropriate word(s).