STEAM/HYDRONICS Flashcards
the amount of heat released by a defined measurable amount of fuel during combustion process is a definition of:
Calorific value
The impusle of heated gas to rise in a vertical passage as in a chimney, small enclosure or stairwell is a definition of
stack vent
A device installed in the piping that opens a circuit if no flow is present is a definition of an
flow switch
what is a example of a limit control
fan switch
the energy to raise temperature without changing physical state is known as
sensible heat
the energy required to change physical state without changing temperature is
latent heat
transfer heat through liquid or gas is known as
convection
Flue gas will condense when it is cooled to its dew point temperature. this condensate is considered to be
a, potable
b, nuetral
c, alkali
d, acidic
acidic
What will be found on a heating boiler that is approved to the A.S.M.E standard?
H
what device compensates for the normal expansion and contraction of the water in a hot water boiler
diaphragm tank
what mandatory device is required by A.S.M.E n a low mas boiler over 400,000 btu
flow switch
what can cause coil damage in a low mass boiler
scale build up in the heat exchanger
where is the best location of a circulator
downstream from the compression tank
what is the purpose of a flow control valve
to prevent the pump from deheading
why is important to remove gases from hot water heating system
to prevent air binding in the system
most gauges on a boiler have an accuracy of %
1 to 1.5 %
purpose of a balancing valve
to adjust flow rates throughout the system
what is the name of the piping system in which the first heat transfer unit supplied is also the first returned
two pipe direct return
what causes convection currents
different air densities
what method of a heat transfer is utilized by a plate heat exchanger
conduction
What is the minimum amount of lightweight concrete required over the tubing when installing a radiant panel over wood surface
3/4
Radiant tubing installed below wooden floors requires special components to aid in the lateral migration of hat. what are these components called
transfers plates
what effect would raising a fin vector above recommended installation height have on the heat output
heat output would be reduced
how does a forced air heating system heat a room or space
from the ceiling down to the floor
what is the manufacture recommended length of pex tubing
300 ft
radiant floor heating typically operates at water temperature
140 degrees f
