WITH VERIFIED ANSWERS AND RATIONALES | 2026 2027 Edition | All 9
Core Domains Covered | DCAS Civil Service Exam Prep | Instant
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10% <CORRECT ANSWER>In high pressure electric generating plants in large buildings,
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heating the feed water from 70f to 180f with exhaust steam usually will decrease the fuel
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consumption by...
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Steam pipe in the room before the pneumatic steam valve <CORRECT ANSWER>The direct
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room radiator with a pneumatically controlled steam heating system is cold, while the
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adjoining rooms are heated adequately. The first thing you would check in the room is...
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Inches of vacuum <CORRECT ANSWER>The usual vacuum gauge on a steam heating system
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reads in...
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Oil pressure <CORRECT ANSWER>In a mechanical pressure type burner using no 6 oil heated
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to 230 f by steam, the oil is atomized by...
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Shut down the burner when primary air failure occurs <CORRECT ANSWER>A vaporstat with
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separate motor driven oil pump used on a fully automatic heavy oil Brunéi get rotary cup
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installation is generally used to...
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Gallons Pumped <CORRECT ANSWER>In estimating the amount of work being done by a
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steam driven water pump, the one of the following items which is usually the most
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important in the calculation of pump horse power is the ...
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A rate of flow <CORRECT ANSWER>The term fixture unit usually refers to ...
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The water was too hot <CORRECT ANSWER>When pumping water from a return tank,
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equipped with an automatic make up valve located below the pump, the most probable
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cause of periodic pump failures to deliver the water would be...
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, NYC CUSTODIAN ENGINEER EXAM –MOST TESTED PRACTICE QUESTIONS
WITH VERIFIED ANSWERS AND RATIONALES | 2026 2027 Edition | All 9
Core Domains Covered | DCAS Civil Service Exam Prep | Instant
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Soda acid <CORRECT ANSWER>Suppose a small oil fire has broken out in the boiler room in
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your building, under these circumstances, the extinguisher least suitable for use is...
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A large induction motor operating at 60%normal rated capacity <CORRECT ANSWER>Of the
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following, a low power factor would most likely result from...
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Adjust the field of the incoming unit <CORRECT ANSWER>Before putting two dc engine
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generators on the line in parallel, it is usually necessary to ...
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Synchronous motor <CORRECT ANSWER>Of the following, the best type of AC motor to use
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for direct connection to a timing device which must be very accurate is a...
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200 BTU per minute <CORRECT ANSWER>One ton of refrigeration may be expressed most
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accurately as...
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Alum is added to water to form a flee before the water reaches the filters <CORRECT
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ANSWER>Which of the following statements is correct with respect to filtration plants of
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swimming pools...
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Limit switch (only active when is running) <CORRECT ANSWER>An electric elevator car stalls
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on the ground floor of a school building. Of the following the item you would least likely to
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check in your inspection is the B) Floor door switch C) Limit switch D) current to elevator
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motor
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A submerged inlet condition may be created resulting in back siphonage <CORRECT
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ANSWER>An examination of the water supply of the sinks of demonstration tables in science
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