Pregunta 1
Pregunta
In a purely technical sense, the word fluid can mean either a liquid, such as water, or a gas, such as air.
Pregunta 2
Pregunta
Flow velocity is a measurement of the volume of fluid that passes a given location in a pipe in a given time.
Pregunta 3
Pregunta
The static pressure at a given depth below the surface of a liquid remains exactly the same regardless of the diameter of the pipe.
Pregunta 4
Pregunta
Using pressure gauges to detect changes in the head of a liquid is like using thermometers to detect changes in the thermal energy content of that liquid.
Pregunta 5
Pregunta
Each component in a piping assembly or circuit has an associated hydraulic resistance that defines its ability to dissipate thermal energy from the fluid at any given flow rate.
Pregunta 6
Pregunta
Use of pressure drop charts based on 60ºF water will consistently overestimate the pressure drop in hydronic piping circuits because the water will usually be at higher temperatures.
Pregunta 7
Pregunta
The equivalent length of a component is the amount of tubing, of the same pipe size, that would produce the same head loss (or pressure drop), as the actual component, at the same flow rate.
Pregunta 8
Pregunta
The equivalent hydraulic resistance of an entire assembly is always greater than the smallest individual hydraulic resistance.
Pregunta 9
Pregunta
Determining the flow rates in systems with several parallel branches does not require "number crunching."
Pregunta 10
Pregunta
Every piping system should be thought of as having an operating cost as well as an installation cost.
Pregunta 11
Pregunta
The term "flow velocity" is commonly understood to mean the __________ flow velocity of the fluid as it moves through a pipe.
Respuesta
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pressurized
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average
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maximum
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minimum
Pregunta 12
Pregunta
A pipe size should be selected that keeps the average flow velocity between _________ ft./sec.
Respuesta
-
.5 and .75
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1 and 2
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1 and 3
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2 and 4
Pregunta 13
Pregunta
Fluids in a hydronic system contain both thermal and mechanical energy. The mechanical energy, or ________, present in a fluid depends on several factors including its pressure, density, elevation, and velocity at some point in the system.
Respuesta
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flow
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compression
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head
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pressure
Pregunta 14
Pregunta
Whenever a fluid flows, an energy dissipating effect called _________ develops both within the fluid stream and along any surfaces the fluid contacts.
Respuesta
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viscous friction
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thermal reduction
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anti-flow
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pressure inhibition
Pregunta 15
Pregunta
After the hydraulic resistances of all devices in a piping assembly are determined, they can be combined into a(n) ___________ resistance similar to how electrical resistances are combined in circuit analysis.
Respuesta
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equivalent
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combined
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calculated
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average
Pregunta 16
Pregunta
__________ represents the relationship between flow rate and head loss for a given piping circuit using a specific fluid at a given temperature.
Pregunta 17
Pregunta
Copper tubing is also subject to a condition called _________, which can literally scrub metal off the inside wall of a tube or fittings.
Respuesta
-
thermal rusting
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frictional pressure
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flow rasping
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erosion corrosion
Pregunta 18
Pregunta
The simplest piping assemblies are formed by connecting piping components end to end. In some cases, the collection of tubing, fittings, valves, and other components closes on itself to form a __________.
Respuesta
-
multi-resistor system
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radiant loop
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series circuit
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thermal compound
Pregunta 19
Pregunta
A more efficient method can be used in the common situation where the piping circuit contains a(n) __________ of pipe, fittings, and valves.
Respuesta
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wide variety
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single size
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industry standard amount
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user maintainable
Pregunta 20
Pregunta
The piping paths that share common points of connection are said to be piped _________.
Respuesta
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in parallel
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in series
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equivalently
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cooperatively