NYC Custodian Engineer (BOE) Exam 2026 Original Practice Questions, Answers & Rationales

NYC Custodian Engineer (BOE) Exam 2026 Original
Practice Questions, Answers & Rationales
Pressutrol <CORRECT ANSWER>An electrical device whose function is to keep boiler steam
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pressure from exceeding the predetermied pressure
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Treat boiler water <CORRECT ANSWER>Sodium Sulphite is used to
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9 to 11 ... 10 to 12 <CORRECT ANSWER>Boiler water should have a PH of
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Vaporstat <CORRECT ANSWER>the unit of a rotary cup oil burner that senses primary air
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failure is the ...
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Directly as the pump speed <CORRECT ANSWER>The quantity of a water delivered by a
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centrifugal pump varies...
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Converting velocity head into pressure head <CORRECT ANSWER>The volute casing of a
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centrifugal pump serves the main purpose of ...
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Humidity <CORRECT ANSWER>The amount of water vapor mixed with dry air in the
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atmosphere is known as ...
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144 BTU <CORRECT ANSWER>When water freezes at 32F the amount o of heat lost per lb of
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water is...
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Difference in pressure <CORRECT ANSWER>A Manometer measures
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12% <CORRECT ANSWER>The carbon dioxide content of the flue gasses of an efficiently fired
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boiler should measure about...
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,NYC Custodian Engineer (BOE) Exam 2026 Original
Practice Questions, Answers & Rationales

Amount of heat lost <CORRECT ANSWER>When a boiler setting leaks air, there is an increase
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in the ...
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Red <CORRECT ANSWER>The piping through which water from private wells is delivered to
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swimming pools must be painted ...
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Calcium Hypochorite <CORRECT ANSWER>A chemical commonly used to disinfect swimming
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pools is...
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3/4 inch <CORRECT ANSWER>Gas range piping should have a minimum diameter of ...
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Hygrometer <CORRECT ANSWER>An instrument that measures relative humidity is called..
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34 <CORRECT ANSWER>The united inches for a pained of glass that measures 14 inches by
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20 inches is...
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Light oil <CORRECT ANSWER>Neoprene gasket would normally be used in a pipeline carrying
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...
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Prevent electric shock during maintenance operation <CORRECT ANSWER>An interlock is
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generally installed on electronic equipments to ...
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Windbox <CORRECT ANSWER>A plenum chamber is sometimes called a...
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, NYC Custodian Engineer (BOE) Exam 2026 Original
Practice Questions, Answers & Rationales
Melt when the water level drops below the level of the plug <CORRECT ANSWER>The
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function of a fusible plug is...
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Tempering <CORRECT ANSWER>The addition of moisture to coal to promote combustion of
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coal is commonly referred to as...
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Stop the burner when the flame goes out <CORRECT ANSWER>The purpose of a stack switch
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in an oil burner system is to...
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Alcohol <CORRECT ANSWER>The proper cleaning agent for a paint brush that has been used
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to shellac a floor is...
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Decreases <CORRECT ANSWER>When the temperature of water that is to be pumped rises
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from 150F to 200 F, the suction lift of a pump ...
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20 <CORRECT ANSWER>A 115 v hot water heater has a resistance of 5.75 ohms. The current
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it will take at rated voltage is...
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Boiler water softening agent <CORRECT ANSWER>To the operation engineer, the term zeolite
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refers to...
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Ignition and starting are done manually <CORRECT ANSWER>When a horizontal rotary oil
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burner is under semiautomatic control, it is generally correct to assume that...
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Prevent sediment from being carried into the plumbing <CORRECT ANSWER>The pipe tanking
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water from a roof supply tank should extend at least six inches above the bottom of the
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tank primarily in order to...
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