Answer the following statement(s) true (T) or false (F)
1. The system head loss curve that describes head loss versus flow rate in a specific piping system is not very dependent on fluid properties and temperature.
2. Circulators with “flat” pump curves should be used when the objective is to maintain a relatively steady pressure differential across the distribution system over a wide range of flow rates.
3. When two identical circulators are connected in series, the resulting pump curve can be found by doubling the head produced by a single circulator at each flow rate.
4. The pump curve for two identical circulators connected in parallel is obtained by doubling the flow rate of a single circulator at each head value.
5. For a liquid at a given temperature, cavitation occurs anywhere the liquid’s pressure drops below its vapor pressure.
1. False
2. True
3. True
4. True
5. True
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Los materiales de poliestireno se utilizan:
a. en sistemas de agua caliente. b. en tuberías de vapor. c. en instalaciones de baja temperatura sin barrera de vapor. d. en instalaciones de baja temperatura con barrera de vapor.
Which subcooling reading most likely indicates a low refrigerant charge?
a. 2° b. 12° c. 15° d. 22° e. 30°
The outputs enable function:
A) activates high output on tri-state buffer. B) allows tri-state buffer to go either high or low as needed. C) activates Hi-Z mode or tri-state buffer. D) activates low output on tri-state buffer.
The process of checking the MPS against available capacity is called:
A) shop-floor control. B) rough-cut capacity planning. C) capacity planning. D) capacity control. E) process checking.