Chapter 13 - Quiz

Frage 1 von 20

1

If properly designed, a closed-loop hydronic system should rid itself of most air within a few days of initial start-up.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 2 von 20

1

The oxygen that causes corrosion is the same oxygen that forms water molecules.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 3 von 20

1

Circulators transfer maximum head energy to incompressible fluids (e.g., liquids). A mixture of water and air is an example of an incompressible fluid.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 4 von 20

1

Air has much lower specific heat and density than water.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 5 von 20

1

Circulators with internal spring-load check valves installed in vertical piping with upward flow are especially susceptible to air pockets.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 6 von 20

1

Although water may appear perfectly clear and free of bubbles, it can still contain a significant quantity of air in solution.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 7 von 20

1

Combined air and dirt separators, or a hydraulic separator with the same capabilities, are never desirable in situations where an older distribution system containing steel or iron piping or radiators will be interfaced to a new boiler.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 8 von 20

1

Properly designed and installed hydronic systems will always require constant manual air venting.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 9 von 20

1

Low system pressurization is usually caused by not setting the make-up water system properly.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 10 von 20

1

Glycol-based antifreezes tend to leave a slippery film on components and tools that eventually turn sticky.

Wähle eins der folgenden:

WAHR
FALSCH

Erklärung

Frage 11 von 20

1

Flow noise is generated when dissolved gases are released from improperly deaerated fluid due to a __________ in pressure.

Wähle eine der folgenden:

increase
modulation
equalization
reduction

Erklärung

Frage 12 von 20

1

Air contains oxygen, and oxygen in contact with ferrous metals creates __________.

Wähle eine der folgenden:

oxides
antigens
bubbles
deaeration

Erklärung

Frage 13 von 20

1

A large pocket of air trapped within a system can totally stop flow. This effect is often called air _________.

Wähle eine der folgenden:

blockage
plugging
binding
trapping

Erklärung

Frage 14 von 20

1

Dissolved air can also lead to gaseous cavitation. Gaseous cavitation occurs when the pressure on the fluid __________ the saturation pressure of the dissolved gases it contains.

Wähle eine der folgenden:

equals
drops below
rises above
is double

Erklärung

Frage 15 von 20

1

When air exists as bubbles, a moving fluid may be able to carry them along through the system. This is called __________ air.

Wähle eine der folgenden:

entrained
fluid
deaerated
bubbly

Erklärung

Frage 16 von 20

1

The air removal devices used in small hydronic systems can be classified as either high point vents or __________.

Wähle eine der folgenden:

"bleeders"
central air separators
"coin vents"
deaerators

Erklärung

Frage 17 von 20

1

The need for fully automatic (unattended) venting in locations not easily accessed requires a different type of device. A(n) __________ air vent often provided the solution.

Wähle eine der folgenden:

electronic
top-loaded
ergonomic
float-type

Erklärung

Frage 18 von 20

1

A(n) __________ is capable of maintaining the system fluid in an unsaturated state of air solubility. This means that the water is always ready to absorb additional air from any areas of the system where it may be present.

Wähle eine der folgenden:

air purger
coalescing media
microbubble air separator
hygroscopic air vent

Erklärung

Frage 19 von 20

1

A device that makes short work out of filling and purging residential and light commercial hydronic systems consists of a minimum 1-horsepower swimming pool pump mounted on a 30-gallon plastic trash barrel. This device is called a(n) __________.

Wähle eine der folgenden:

circulator
purge cart
air scooper
deaerator

Erklärung

Frage 20 von 20

1

An automatic fluid feeder uses a small positive displacement pump operated by a pressure sensing switch to automatically pump fluid into the system when the pressure __________ a set minimum value.

Wähle eine der folgenden:

reaches
drops below
exceeds
is stored at

	Erstellt von Neil Revollo vor etwa 8 Jahre

Air Removal, Filling, and Purging

Chapter 13 - Quiz

Frage 1 von 20

If properly designed, a closed-loop hydronic system should rid itself of most air within a few days of initial start-up.

Wähle eins der folgenden:

Erklärung

Frage 2 von 20

The oxygen that causes corrosion is the same oxygen that forms water molecules.

Wähle eins der folgenden:

Erklärung

Frage 3 von 20

Circulators transfer maximum head energy to incompressible fluids (e.g., liquids). A mixture of water and air is an example of an incompressible fluid.

Wähle eins der folgenden:

Erklärung

Frage 4 von 20

Air has much lower specific heat and density than water.

Wähle eins der folgenden:

Erklärung

Frage 5 von 20

Circulators with internal spring-load check valves installed in vertical piping with upward flow are especially susceptible to air pockets.

Wähle eins der folgenden:

Erklärung

Frage 6 von 20

Although water may appear perfectly clear and free of bubbles, it can still contain a significant quantity of air in solution.

Wähle eins der folgenden:

Erklärung

Frage 7 von 20

Combined air and dirt separators, or a hydraulic separator with the same capabilities, are never desirable in situations where an older distribution system containing steel or iron piping or radiators will be interfaced to a new boiler.

Wähle eins der folgenden:

Erklärung

Frage 8 von 20

Properly designed and installed hydronic systems will always require constant manual air venting.

Wähle eins der folgenden:

Erklärung

Frage 9 von 20

Low system pressurization is usually caused by not setting the make-up water system properly.

Wähle eins der folgenden:

Erklärung

Frage 10 von 20

Glycol-based antifreezes tend to leave a slippery film on components and tools that eventually turn sticky.

Wähle eins der folgenden:

Erklärung

Frage 11 von 20

Flow noise is generated when dissolved gases are released from improperly deaerated fluid due to a __________ in pressure.

Wähle eine der folgenden:

Erklärung

Frage 12 von 20

Air contains oxygen, and oxygen in contact with ferrous metals creates __________.

Wähle eine der folgenden:

Erklärung

Frage 13 von 20

A large pocket of air trapped within a system can totally stop flow. This effect is often called air _________.

Wähle eine der folgenden:

Erklärung

Frage 14 von 20

Dissolved air can also lead to gaseous cavitation. Gaseous cavitation occurs when the pressure on the fluid __________ the saturation pressure of the dissolved gases it contains.

Wähle eine der folgenden:

Erklärung

Frage 15 von 20

When air exists as bubbles, a moving fluid may be able to carry them along through the system. This is called __________ air.

Wähle eine der folgenden:

Erklärung

Frage 16 von 20

The air removal devices used in small hydronic systems can be classified as either high point vents or __________.

Wähle eine der folgenden:

Erklärung

Frage 17 von 20

The need for fully automatic (unattended) venting in locations not easily accessed requires a different type of device. A(n) __________ air vent often provided the solution.

Wähle eine der folgenden:

Erklärung

Frage 18 von 20

A(n) __________ is capable of maintaining the system fluid in an unsaturated state of air solubility. This means that the water is always ready to absorb additional air from any areas of the system where it may be present.

Wähle eine der folgenden:

Erklärung

Frage 19 von 20

A device that makes short work out of filling and purging residential and light commercial hydronic systems consists of a minimum 1-horsepower swimming pool pump mounted on a 30-gallon plastic trash barrel. This device is called a(n) __________.

Wähle eine der folgenden:

Erklärung

Frage 20 von 20

An automatic fluid feeder uses a small positive displacement pump operated by a pressure sensing switch to automatically pump fluid into the system when the pressure __________ a set minimum value.