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High Pressure Boiler
| Question | Answer |
|---|---|
| The total heat of a fluid. Measure in British Thermal Units | ENTHALPY |
| The amount of heat required to raise the temperature of 1 pound of water 1 degree Fahrenheit | BRITISH THERMAL UNIT |
| Change the temperature of a substance, but not the state | SENSIBLE HEAT |
| Change the state of a substance but not the temperature | LATENT HEAT |
| Heat necessary to change 1pound of substance from a liquid to a gas at constant temperature | LATENT HEAT OF EVAPORATION |
| Heat is necessary to change the state of 1 pound of a substance from a solid to a liquid at a constant temperature | LATENT HEAT OF FUSION |
| The temperature at which all molecules motions cease. | ABSOLUTE ZERO |
| Support of a furnace is a method of preventing the internal furnace from collapse from external pressure | SELF SUPPORT, CORRIGATED, STAYS, ADAMSON RINGS |
| Types of fire tube boiler | HORIZONTAL RETURN BOILER FIRE BOX LOCOMOTIVE SCOTCH MARINE VERTICAL TUBLAR VERTICAL TUBELESS |
| A boiler operates above the critical point of water which is 3206.2 psia and 705.4 degrees | SUPER CRITICAL |
| The amount of heat required to evaporate 34.5lb. Steam per hour of water at a temperature | BOILER HORSEPOWER |
| A boiler in which hot water is circulated for heating purposes and then returned to the boiler. Does not exceed 160 psi or 250 degrees | HOT WATER HEATING BOILER |
| The result of a force on an object that presses or squeeze an object | COMPRESSION STRESS |
| The result of a force on an object that stretches an object | TENSILE |
| The result of a force on an object that shears or cut through the object | SHEER STRESS |
| Heat transfer in which molecules come in direct contact with each other and heat is passed from one molecules to another | CONDUCTION |
| Method of heat transfer in which heat is transferred from one point to another by heat carrying medium | CONVECTION |
| The transfer of heat that occurs without a heat carrier. Heat flowing naturally through the air | RADIATION |
| The minimum size of a blowdown line is | 3/4" to 2 1/2" |
| The temperature of a liquid minus 32 is the | HEAT OF LIQUID |
| Super heater located in the radiant section of the furnace | Radiant |
| Name three places internal corrosion occurs in a vertical boiler | AT WATER LINE IN THE TUBE IN THE VICINITY FEED WATER CONNECTION TOP OF LOWER TUBE SHEET |
| Firing doors on water tube boiler are equipped to be | Inward opening type and self latching |
| Welding a flat strip of metal between the water wall tubes is known as | MEMBRANE WALL CONSTRUCTION |
| A low pressure steam boiler must have ASME | H stamp |
| A pressure relief device used on a steam or gas system. Opens rapidly and fully with a popping action. Capacity in lbs./ hr. | SAFETY VALVE |
| A pressure relief device use on a water or liquid system. Opens gradually and proportionally to the increase in pressure. Capacity in BTU/ hr. | RELIEF VALVE |
| Minimum pipe between boiler and the water column. | 1" |
| Minimum pipe size connection for gauge glass to water column is | 1/2" |
| Eliminate excessive fluctuations or oscillation of the water level indication in the gauge glass | WATER COLUMN |
| A steam Boiler that operates above 15psi or a hot water boiler that operates above 160 psi or 250 degrees. ASME (S) stamp | POWER BOILER |
| The pressure applied to an object due to gravitational attraction of earth. | ATMOSPHERIC PRESSURE |
| The pressure read on a pressure gauge that is above atmospheric gauge pressure is read as Paige or psi | GAUGE PRESSURE |
| The sum of gauge pressure and atmospheric pressure read as psia | ABSOLUTE PRESSURE |
| The result of all forces acting on an object | TOTAL FORCE |
| Is a closed pressure vessel in which a fluid is heated for use external to itself by the direction application of heat | A BOILER |
| A high pressure boiler that does not exceed any of the following : Less than or equal 16" shell diameter Less than or equal 5 cubic ft. Gross furnace volume Less than or equal 100 psi max operating pressure Less than or equal 20 square feet of heating | MINIATURE BOILER |
| Are used to give the flat section of a boiler additional strength, so that thicker plates are not needed | BOILER STAYS |
| Banks of tubes that lie in the inside of a boiler and transfer heat to the boiler water to produce steam | WATER WALL TUBE |
| Most common place for corrosion | WATER LEGS CORROSION AT WATERLINE TOP OF LOWER TUBE SHEET |
| Prevent the tube end from being overheated and being burnt off | BEADING |
| Equation for Diameter | D = R x 2 |
| Equation for Circumstance | A = d x 3.41 |
| Equation for circle | A = d square x .7855 |
| Equation of Rectangle | A = B x H |
| Equation of Triangle | A = .5 x B x H |
| Equation for volume of a Cylinder | V = A x L |
| Equation for volume of a Rectangle or box | V = B x H x L |
| Equation for Capacity ( gallons) of a Tank | G = V/231 |
| Equation for converting Area of a Rectangle or box to Diameter of a Circle | A = B x H or L x W D = A / .7854 Square root |
| Convert degrees fahrenheit to Celsius | C = ( F - 32) / 1.8 |
| Converting degrees Celsius to Fahrenheit | F = ( C x 1.8) + 32 |
| Absolute Zero | F - 460 degrees C - 273 degrees R = Rankine K = Kelvin |
| Equation for Total Force | TF ---------- P X A |
| When given BTU per hour, what is the equation for Boiler Horse Power | BTU BHP = -------- 33,475 |
| When given the amount of steam generated in PPH What is the equation for Boiler Horse Power | BHP BHP = ------- 34.5 |
| Two types of electric boilers | RESISTANCE and ELECTRODES |
| Black liquor Boiler is specific to paper mill | GENERATE STEAM SODA ASH 58% BURN PAPER |
| It's a byproduct of sugar Cane industry | BAGASSE |
| Prior to entering a confined space, the minimum amount of oxygen is in the space | 19 % |
| If the space requires a permit, permit must be filled and registered to | EACH SHIFT |
| Actual Pressure = Gauge Pressure | AP = GP - ( Effective Water Leg /231) |
| Water Column Connections | CROSS T are used instead of 90 degrees elbows |
| Safety Valve Name Plate | Manufacturer's name or Trademark Manufacturer's model or design Sizes, inches Seat Diameter Set pressure Blow back Discharge capacity ASME symbols/ stamp |
| Equation for Sizing Relief Valve on a pressure reducing Station | RVC x 1/3 x VSPA RVC x 1/2 x BPH |
| Water at its boiling point is considered a | SATURATED LIQUID |
| Fire in the tube and water around tube | FIRE TUBE |
| Water in the tube and fire around the tube | WATER TUBE |
| What is the maximum discharge blowdown water temperature in DC? | 140 degrees |
| The three important functions of a steam traps are? | Discharge condensate as soon as it forms Have a negligible steam consumption (energy efficient) Have the capability of discharge air and non condemnable gases |
| The major four types of Steam traps | Mechanical Inverted bucket Temperature traps ( use bimetallic and thermostatic) |
| Name four basic types of feed water regulators | Thermostatic Hydraulic Thermostatic Mechanical Regulators Float Regulators Electronic |
| Pressure relief Valve on a hot water boiler must be at least | 3/4" to 4 1/2" |
| Boiler recovers the heat in the exhaust from a gas turbine to produce useful steam | Waste heat |
| The general classification of superheater includes _____ and _____ types depending on where heat is absorbed | Radiant and convection |
| The device that allows for greater surface area for the steam to act upon thus creating a popping action is called a | Huddling chamber |
| The last form of over pressure protection on a boiler, prior to lifting the safety valve is the | High limit control |
| Four basic types of feed water Regulators | Thermostatic Hydraulic Thermostatic Mechanical Float Regulator Electronic |
| #6 Fuel Oil | 150,000 BTU/gal |
| Natural Gas 1 Therm is | 100,000 BTU |
| A steam pressure gauge must be protected by a siphon to prevent | Steam from damaging the gauge |
| The correction factor for hydrostatic pressure is | .433 |
| A safety valve must be capable of discharge all the steam without the pressure increasing more than ______ above the MAWP | 6% |
| A boiler steam pressure gauge should be connected to the _______ side of the boiler | Highest part of the steam |
Created by:
Amangra