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14 Cards in this Set
- Front
- Back
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One of the main purposes of an external inspection is to
a) observe operation and maintenance practices b) check the plant records, log books, etc. c) verify that scale is not present on or in the tubes d) check the operation of each safety shutdown device e) inspect all auxiliary equipment and pressure vessels |
A
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When the boiler is removed from service, it can be drained once the temperature reaches approximately a) 150 degrees C b) 30 degrees C c) 50 degrees C d) 90 degrees C e) 70 degrees C |
D
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Just before entering the waterside of the boiler it is important to a) notify the inspector in writing of your intent to do so b) ensure the chief engineer is aware of your intent c) be wearing self contained breathing apparatus (SCBA) d) test the atmosphere with an oxygen "sniffer" e) obtain permission to do so from plant management |
D
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When cooling down a steam boiler that has been taken out of service, a vent valve on the steam drum should be opened to a) prevent a vacuum from forming in the boiler b) release the air from the boiler c) purge the shell of impure gases d) let the operator know when the pressure has reached zero e) prevent pressure build-up in the boiler |
A
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Before cleaning the waterside and as far as is possible a) a visual inspection of pressure parts should be completed b) all drum internals should be removed c) mud drum sludge should be completely removed d) a scale sample should be taken and an analysis done e) tubes should be "turbined" |
A
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One of the legal responsibilities of the engineer during an inspection is to a) be in possession of an inspection certificate b) point out any known or suspected defects to the inspector c) have at least two staff members present at all times d) allow the inspector onto the premises, but only during working hours e) notify the Workers' Compensation Board of the inspection |
B
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The external inspection of a boiler a) may include making sure the valves are in good operating condition b) may include making sure the furnace refractory is in order c) may include making sure the tubes are free of scale d) must be done after the boiler has been drained e) may include making sure the exterior of the tubes are in good condition |
A
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A boiler inspection a) must be done after every shut down of the boiler b) must be done when the boiler inspector requests it c) must be done every two years d) is done with the owner's permission only e) must be done before the boiler is ready for start-up |
B
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A hydrostatic test on a high pressure steam boiler a) must be done on a new boiler b) must only be done by the inspector c) will test the high pressure steam fuel cut-off d) should be done with the Chief Engineer present e) must be done before start-up of a boiler |
A
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Chemical cleaning of smaller boilers is not usually done because a) of the small surface area which the chemical contacts b) of the thin metal of which they are manufactured c) they do not have adequate support for the high density of the chemicals d) it is impossible to get the chemical circulating adequately e) the cost to do so is not warranted or justified |
E
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For an alkaline boil out, the boiler is maintained at a desired steam pressure for about a) 12 hours b) 8 hours c) 16 hours d) 48 hours e) 24 hours |
D
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A relatively new and safer chemical used in boiler cleaning and treatment is a) chelates b) trisodium phosphate c) sodium hydroxide d) caustic soda e) hydrazine |
A
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An inhibitor, when added to acid, will a) minimize the effect the acid has on the metal b) make the acid compatible with the sewer system for disposal c) strengthen the acid thereby shortening the cleaning procedure d) prevent the acid from attacking the boiler metal e) cause foaming in the boiler |
A
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The most popular acid for boiler cleaning is a) sulphuric b) hydrochloric c) phosphoric d) nitric e) chelate |
B
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