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16 Cards in this Set
- Front
- Back
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A resistance control or "potentiometer" for modulating control: 1) Works in conjunction with a modutrol motor 2) Senses steam temperature 3) Can only be used on a fully automatic boiler 4) Can operate only in the vertical position 5) Utilizes a mercury switch |
Works in conjunction with a modutrol motor |
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A device found on the pressure side of a boilers operating control switch is a: 1) Modutrol motor 2) Syphon 3) Feedwater pressure gauge 4) Combustion air proving switch 5) Test connection for an inspector |
Syphon |
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Quickly closing the main burner manual cock valve during boiler operation should check the: 1) Low fire interlock switch 2) Flame scanner 3) Low gas pressure fuel cut-off 4) High gas pressure fuel cut-off 5) Combustion air proving switch |
High gas pressure fuel cut-off |
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Attacing a test lead or "jumper wire" is required when testing: 1) The low water fuel cut-off switch 2) High steam pressure or water temperature limiting controls 3) A high gas pressure fuel cut-off switch 4) A low gas pressure fuel cut-off 5) A safety valve with the test lever |
High steam pressure or water temperature limiting controls |
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A leveling indicator is found on: 1) A modutrol motor 2) A low-water fuel cutoff switch 3) A boiler feedwater pump 4) The casing of a heating boiler 5) An ON-OFF operating control switch |
An ON-OFF operating control switch |
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The current code that covers hot water heating or hot water supply boilers that operate at temperatures not exceeding 121°C is: 1) CSA B-51 2) Alberta Pressure Equipment Safety Regulation 3) ASME Section IV 4) ASME Section I 5) Alberta Power Engineers Regulation |
ASME Section IV |
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A modulating control steam heating boiler: 1) Will have a constant combustion air flow rate 2) Will have a wide operating pressure range 3) Cannot operate in a multi-boiler system 4) Has very efficient operation 5) Is always fully automatic |
Has very efficient operation |
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An ON-OFF steam boiler burner operation control: 1) Will maintain a fairly constant steam pressure 2) Will cycle on and off based on temperature 3) Operates most efficiently at continuous firing 4) Must have a low capacity 5) Cannot operate in a multi-boiler system |
Operates most efficiently at continuous firing |
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A hot water boiler operating control can be a pressure switch: 1) Sensitive to steam pressure 2) Sensitive to boiler steam pressure 3) Which is normally open 4) Utilizing a closed liquid filled system 5) Which is sensitive to the expansion and contraction of boiler water |
Utilizing a closed liquid filled system |
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The combustion air, proving switch: 1) Must always be a manual reset device 2) Should be checked when air flow is minimum 3) Should not be checked while the boiler is in the purge cycle of start-up 4) Is a normally closed switch 5) Should be checked when air flow is maximum |
Should be checked when air flow is maximum |
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Combustion air safety switches are commonly found: 1) As non-interlocking devices and take no part in a startup 2) On natural draft boilers 3) On gas fired boilers only 4) On hot water boilers only 5) On boilers utilizing a forced draft fan |
On boilers utilizing a forced draft fan |
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Prior to a boiler safety valve popping during routine boiler operation: 1) The feedwater pump should stop 2) The pressure gauge should be checked 3) The high limit switch should open 4) The high level alarm should sound 5) A try lever test should be performed |
The high limit switch should open |
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A device found on the pressure side of a boilers operating control switch is a: 1) Modutrol motor 2) Syphon 3) Feedwater pressure gauge 4) Combustion air proving switch 5) Test connection for an inspector |
Syphon |
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Modulating burner controls operate by regulating: 1) Fuel flow, air flow, and feedwater pressure 2) Fuel flow and atomizing steam flow 3) Steam flow and fuel flow 4) Fuel temperature and air flow 5) Fuel flow and air flow |
5) Fuel flow and air flow |
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The main boiler control device used with an on/off combustion fuel control is a/an _____ sensing element. 1) Level 2) Electronic 3) Temperature 4) Pneumatic 5) Pressure |
5) Pressure |
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Quickly closing the main burner manual cock valve during boiler operation should check the: 1) Low fire interlock switch 2) Flame scanner 3) Low gas pressure fuel cut-off 4) High gas pressure fuel cut-off 5) Combustion air proving switch |
4) High gas pressure fuel cut-off |
