Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
5 Cards in this Set
- Front
- Back
When cutting in an additional boiler into the heating system the: 1) Supply valve is open slightly and the return line is closed 2) Supply valve only is closed 3) Stop valves in the supply and return lines are both closed 4) Supply and return line valves are both open slightly 5) Supply and return lines are open |
Stop valves in the supply and return lines are both closed |
|
A gradual increase in stack temperature is an indication of: 1) All of the above 2) Unclean heating surfaces 3) Too much excess air 4) Poor damper operation 5) Poor burner operation |
Unclean heating surfaces |
|
Thermal shock to boilers can be reduced by: 1) Warming up boilers slowly 2) Not allowing full flow of cold water into a warm hot water boiler 3) Keeping the boiler free of scale build-up 4) All of the above 5) Covering the tube sheets with refractory |
All of the above |
|
Routine testing of the low water fuel cutoff is done by: 1) Blowing down the water column 2) Blowing down the float chamber 3) Blowing down the float chamber while holding the shutdown bypass switch 4) Blowing down the boiler 5) Shutting down the boiler |
Blowing down the float chamber while holding the shutdown bypass switch |
|
How often would you test the low level fuel cut-off on a low pressure steam heating boiler by blowing out the float chamber? 1) Semi-annually 2) Bi-weekly 3) Annually 4) Daily 5) Monthly |
Daily |