Final Flashcards
A therm is a unit equivalent to
100,000 btu
A low pressure boiler is a boiler is a boiler that has an MAWP of up to
15 psi
What is sensible heat
heat that can be measured by a change in temperature
What is Latent heat
heat energy that causes a change of state and no temperature change.
What is primary air
air in the combustion process that regulates the rate of combustion
What are the four main boiler systems
steam system, feedwater system, fuel system, draft system
Boiler water ph should be between
10 and 11.5
what is a firetube boiler
a boiler in which the hot gases of combustion pass through tubes surrounded by water.
what is a pneumatic system
a fluid power system that transmits energy using a gas( typically compressed air)
What is a hydraulic system
a fluid power system that transmits energy in an enclosed space using liquid under pressure.
what is a reservoir
a container for storing fluid under little or no pressure.
what is an accumulator
a container in which fluid is stored under pressure.
what is cavitation
the process in which microscopic gas bubbles expand in a vacuum and suddenly implode when entering a pressurized area.
what is reciprocating compressor
compressor that uses pistons moving back and forth to increase fluid pressure.
what is kinetic energy
energy in motion
what is potential energy
stored energy a body has due to its position, chemical sate, or condition.
what is welding
a joining process that fuses materials by heating them to melting temperature.
what is brazing
joining process that joins parts by heating the filler metals to temperatures greater than 840f but less than the melting point of the base metal.
what is voltage
the amount of electrical pressure that causes electrons to move in a circuit.
what is current and how is it measured
the flow of electrons through a conductor. measured in amperes.
what is a open circuit
a circuit having an incomplete path, which prevents current flow.
what is a closed circuit
the presence of a completed path for current flow.
what is resistance and what is it measured in
the oppositions of the flow of electrons, measured in ohmz
what is a watertube boiler
a boiler where water passes through tubes surrounded by gases of combustion.
