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MICHIGAN BOILER FINAL PAPER 2026
COMPLETE ANSWERS PRESSURE VESSEL
CONTROL PRACTICE RESOURCE
โ Burn continually. Answer: the fire point of fuel oil is the minimum temperature at which the fuel will โ Lowest; flow. Answer: the pour point of fuel oil is the ____ temperature at which fuel oil will ____ โ Dangerous to handle. Answer: fuel oil with a low flash point is โ Pressure control. Answer: the operating range of a steam boiler is controlled by a โ Condensate in the line. Answer: water hammer in steam lines is caused by โ Manometer.
Answer: measures the difference in pressure between 2 points, measures draft โ Lowest load. Answer: the best time to blowdown a boiler is when it is at its โ Silica gel. Answer: Boilers that are laid up dry have trays of ____ put in the steam & water drums to absorb moisture โ Mixture; atomization; temperature; time. Answer: required to obtain complete combustion of a fuel โ Pitting. Answer: oxygen in the boiler causes โ Secure the fires & feedwater. Answer: when the boiler low water alarm is ringing, the operator should โ Purging the furnace after ignition failure. Answer: a furnace explosion can be prevented by
โ Internal resistance to flow. Answer: the viscosity of fuel oil is the measurement of the โ Change scale forming salts to a nonadhering sludge. Answer: feedwater is treated chemically before it enters the boiler to โ Minimal amount of excess air. Answer: complete combustion is defined as burning all fuel using โ 5 psi. Answer: when testing the safety valve by hand, there should be at least ____ of pressure on the boiler โ Turbulence in the gauge glass. Answer: the water column on a low pressure steam boiler reduces the โ By hand or by pressure. Answer: safety valves on low pressure boilers can be tested โ Clean the fire & water sides.
Answer: before laying up a boiler, the operator must โ Blowdown the boiler. Answer: if water comes out of the top try cock, the operator must โ Secure the fires & feedwater, allow the boiler to cool slowly, & notify the boiler inspector. Answer: if steam comes out of the bottom try cock, the boiler operator must โ Firetube boiler. Answer: a scotch marine boiler is a โ All safety valves are removed or gagged, the boiler vent is closed, the main steam stop valve is closed. Answer: when performing a hydrostatic test on a boiler โ Draft. Answer: the difference in pressure between 2 points of measurement that causes air or gases to flow โ #6 fuel oil. Answer: has high viscosity compared to #2 fuel oil
โ Siphon. Answer: bourdon tube in a steam pressure gauge is protected by a โ Compound gauge. Answer: measures pressure or vacuum โ Rotating cup & primary air. Answer: atomization of fuel oil in a rotary cup burner is caused by the โ American Society of Mechanical Engineers. Answer: Safety valve connections must be made according to the requirements of the โ Natural draft. Answer: produced by a difference in temperature of a column of gas inside the chimney from a column of air outside the chimney โ Fuel oil return line. Answer: circulates fuel oil during warm up, returns fuel oil that bypasses the burner, & returns fuel oil from the relief valve โ Duplex strainers.
Answer: found on the suction side of the fuel oil pump โ Fuel oil heaters. Answer: must be used when burning #6 fuel oil โ Butterfly valve. Answer: controls the firing rate in a high pressure gas system โ Anthracite. Answer: coal that has a high fixed carbon content โ Flame safeguard system. Answer: burner control equipment that monitors the burner start up sequence & the main flame during normal operation โ Try cocks. Answer: Can be used to determine water level โ Vacuum pump & condensate tank. Answer: Designed to discharge air & pump water โ On/off pressure control.
โ Flash point. Answer: Lower than the fire point of fuel oil โ Gasket leaks. Answer: If the ____ on a duplex strainer, air could be drawn into the fuel lines โ Primary air. Answer: Used to atomized fuel oil โ Cloth wrapped around a wooden dowel. Answer: Should be used to clean the inside of a gauge glass โ Standard. Answer: An accepted reference or practice โ #6 fuel oil. Answer: Has the highest heating value in btu/gal โ Feedwater pump. Answer: Can become steambound if feedwater temperature is too high
โ Water column. Answer: Should be blown down once a shift โ Modulating pressure control. Answer: Controls the amount of fire in the burner โ Priming. Answer: boiler water carried into steam lines โ Pressure control. Answer: Controls high & low fire โ 8.3 lb/gal. Answer: Water weighs approximately โ Expansion tank. Answer: Collects excess water in a natural circulation hot water heating system โ Try lever test. Answer: Tests safety valve operation
โ beading. Answer: the portion of the tube that sticks out is curled outward and back until it touches the tubesheet โ tubes attached to drum via. Answer: rolled or welded โ deaeration. Answer: removal of air or other gases from feedwater by increasing the temperature & stripping out the gases โ reverse osmosis. Answer: method for processing water by forcing it through a membrane through which salts & impurities cannot pass โ demineralization. Answer: uses ion exchange to remove mineral salts โ softening. Answer: removes dissolved mineral salts (such as calcium & magnesium which cause hardness) โ coagulation.
Answer: concentrating & removing suspended solids in boiler feedwater by adding chemicals which cause the impurities to cling together โ high water level in steam drum. Answer: causes water to carry over into steam distribution system which can damage downstream equipment โ power outage. Answer: causes loss of pumps & draft fans โ burner flame impingement or poor flame distribution. Answer: causes overheating & failure of the tubes โ change in fuel flow. Answer: causes creation or increase in soot deposits on tubes causing excessively high temperature on tube walls โ change in composition of fuel. Answer: causes creation or increase in soot deposits on tubes causing excessively high temperature on tube walls โ opening header drains, vents, & peepholes.
โ carryover. Answer: small particles of boiler water are carried into steam lines โ blowdown tank. Answer: vessel that prevents damage to the sewer system from steam and hot water by holding blowdown water until it is cool enough for safe discharge โ modulating control. Answer: controls the firing rate of the burner โ feedwater regulator. Answer: maintains the NOWL in the boiler by controlling the amount of feedwater pumped to the boiler from the surge tank โ evaporation test. Answer: boiler operator allows the water level in the boiler to drop in order to test the proper operation of the low water fuel cutoff โ tube sheet. Answer: A metal sheet into which boiler tubes are mounted
โ flaring. Answer: expands tubes by providing flare shape to the end of the tubes so it can be beaded to the tube sheet โ lap. Answer: type of joints used for seams in all riveted boiler shells โ Hydrostatic test & necessary pressure. Answer: โ Sectional boiler. Answer: โ Safety valve. Answer: โ Relief valve. Answer: โ How many safety's for 500sq ft. Answer:
