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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