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Arkansas Boiler Operator Study Guide Terms, Exams of Nursing

University of CambridgeNursing

Arkansas Boiler Operator Study Guide Terms

Typology: Exams

2024/2025

Available from 07/13/2025

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Arkansas Boiler Operator Study Guide
Terms
Absolute Pressure - correct answer The sum of gauge pressure and atmospheric
pressure
Accessory - correct answer Piece of equipment not directly attached to the boiler
but necessary for its operation
Accumulation Test - correct answer Test used to establish the relieving capacity of
boiler safety valves
Air Ejector - correct answer Steam driven device that removes air and other
noncondensable gases from the condenser, thus maintaining a higher vacuum
Air Flow Switch - correct answer Proves that primary air is supplied to the burner
Air To Fuel Ratio - correct answer Amount of air and fuel supplied to the burner
over high and low fire
Air Heater - correct answer Supplies heated air for combustion. Located in the
breaching between the boiler and chimney.
Ambient Temperature - correct answer Temperature of the surrounding air
Alkalinity - correct answer Determined by boiler water analysis. Boiler water with a
PH over 7 is considered alkaline
Anthracite Coal - correct answer Hard coal that has a high fixed carbon content.
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Arkansas Boiler Operator Study Guide

Terms

Absolute Pressure - correct answer The sum of gauge pressure and atmospheric pressure Accessory - correct answer Piece of equipment not directly attached to the boiler but necessary for its operation Accumulation Test - correct answer Test used to establish the relieving capacity of boiler safety valves Air Ejector - correct answer Steam driven device that removes air and other noncondensable gases from the condenser, thus maintaining a higher vacuum Air Flow Switch - correct answer Proves that primary air is supplied to the burner Air To Fuel Ratio - correct answer Amount of air and fuel supplied to the burner over high and low fire Air Heater - correct answer Supplies heated air for combustion. Located in the breaching between the boiler and chimney. Ambient Temperature - correct answer Temperature of the surrounding air Alkalinity - correct answer Determined by boiler water analysis. Boiler water with a PH over 7 is considered alkaline Anthracite Coal - correct answer Hard coal that has a high fixed carbon content.

Ash Hopper - correct answer Large receptacle used to store ashes until the can be disposed of. Asme Code - correct answer Code written by the American society of Mechanical Engineers that controls the construction, repairs and operation of steam boilers and their related equipment. Atmospheric Pressure - correct answer Pressure at sea level (14.7 psi) Atomize - correct answer To break up liquid in to fine mist. Automatic Nonreturn Valve - correct answer Valve located on the steam line closest to the shell of the boiler that cuts the boiler in on the line and off-line automatically. This valve also protects the system in the event of a large steam leak on any boiler. Auxiliaries - correct answer Equipment necessary for the operation of a boiler. Baffles - correct answer Direct the path of the gases of combustion so that the maximum heat will be absorbed by the water before the gases of combustion enter the breeching and chimney. Balanced Draft - correct answer When the intake damper is automatically controlled by the pressure in the furnace. Furnace pressure is maintained slightly below atmospheric pressure. Bent-Tube Boiler - correct answer A water tube boiler with more than one drum in which the tubes connect the drums. Bituminous Coal - correct answer Direct the path of the gases of combustion so that the maximum heat will be absorbed by the water before the gases of combustion enter the breeching and chimney.

Boiler Shutdown - correct answer A sequence of operations completed when taking a boiler off-line Boiler Start-Up - correct answer A sequence of operations completed when preparing a steam boiler for service. Boiler Tubes - correct answer Used to carry water or heat and gases of combustion. May be straight or bent tubes. Boiler Vent - correct answer Line coming off the highest part of steam side of the boiler that is used to vent air from the boiler when filling with water and when warming the boiler. Also used to prevent a vacuum from forming when taking the boiler off-line. Also known as air cock. Bourdon Tube - correct answer Connected by linkage to a pointer that registers pressure inside pressure gauges. Box Header - correct answer Requires staybolts to prevent the headers from bulging. Found on older water tube boilers. Breeching - correct answer Duct connecting boiler to chimney. British Thermal Unit (BTU) - correct answer A measurement of the quantity of heat. The quantity of heat necessary to heat one pound of water to 1°F. Burning in Suspension - correct answer Combustion of a fuel when burned in air without support.

Butterfly Valve - correct answer A balanced valve used to control gas flow to gas- fired boilers. Bypass Damper - correct answer Controls the air temperature in air heaters to prevent corrosion. Bypass Line - correct answer A pipeline that passes around a control, heater or steam trap. Used so that a plant can operate while equipment is serviced or repaired. Calibrate - correct answer Adjusting a pressure gauge to conform to a test gauge Carryover - correct answer Particles of water that flow with the steam into the main steam line. Caustic Embrittlement - correct answer The collection of high alkaline material that leads to breakdown and weakening of boiler metal. Centrifugal Force - correct answer Force caused by a rotating impeller that builds up in a centrifugal pump. Most boiler feed pumps are this type. Chain (Traveling) Grate Stoker - correct answer A cross-feed stoker that is used with larger capacity boilers because of its ability to feed coal at a faster rate than other stokers. Check Valve - correct answer Automatic valve that controls the flow of a liquid in one direction.

Combustion - correct answer The rapid union of oxygen with an element or compound that results in the release of heat. Combustion Control - correct answer Regulates the air to fuel ratio supplied to the burner. Complete Combustion - correct answer The burning of all supplied fuel using the minimum amount of excess air Compressive Stress - correct answer Occurs when two forces of equal intensity act from opposite directions, pushing toward the center of an object. Fire tubes in a fire tube boiler are subjected to compressive stress. Condensate - correct answer Steam that has lost its heat and has returned to water Condensate Pump - correct answer Used to return condensed steam to the open feedwater heater. Condensate Tank - correct answer Where condensed steam (water) is stored before it is delivered back to the open feedwater heater by the condensate pump. Condense - correct answer Process whereby steam turns back to water after the removal of heat. Conduction - correct answer A method of heat transfer in which heat moves from molecule to molecule.

Conductivity - correct answer A measure of the ability of electrons to flow through a solution. Continuous Blowdown - correct answer Used to control chemical concentrations and total dissolved solids in the boiler water. Convection - correct answer A method of heat transfer that occurs as heat moves through a fluid. Convection superheater - correct answer Located in a boiler and receives heat from convection currents. Counterflow - correct answer Principle used in heat exchangers where the medium being heated flows in one direction and the medium supplying the heat flows in the opposite direction. Cracking Open - correct answer Slowing opening a steam valve to allow pressure to equalize. Cross "T" - correct answer Used on connections on a water column for inspection of steam and water lines to ensure they are clean and clear Cyclone Separator - correct answer Separates water droplets from steam using centrifugal force and changing direction. Damper - correct answer Used to control the flow of air or gases