The most efficient way to keep oxygen out of the boiler water system is to:
a. Add sufficient oxygen scavenger
b. Keep make-up water to a minimum
c. Operate the deaerator at a higher pressure
d. Increase boiler blowoff
e. Maintain a higher pH in the boiler water
Answer: B
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Power Engineering Chapter 95
- The minimum temperature at which a hot water boiler should be operated to prevent flue gas condensation is ___C.
- An excessive rise in stack temperature can be caused by:
- Smoking conditions during the operation of a boiler can be caused by
- It is recommended that the differential between the safety relief valve set pressure and the operating pressure of a hot water boiler be kept to a minimum of 69 kPa (10 psi) or __________ % of the relief valve setting.
- Thermal shock to boilers can be reduced by
- The maximum pressure of a low pressure steam heating boiler is
- There are two conditions that may occur during the warm up period which may seem to be abnormal to the operator but will disappear after the boiler heats up. These conditions are
- The discharge pressure of steam heating pressure relief valves should never exceed
- The pressure relief valve on a hot water heating boiler should be set
- In hot water boiler operation the maximum operating temperature should never exceed
- If the low-water fuel cutoff and/or the high limit control are equipped with a trip-out device on a boiler, it is recommended as part of the startup preparation to
- When preparing a boiler for startup and the boiler is equipped with a modulating combustion control, it is best to
- How often would you test the low level fuel cut-off on a low pressure steam heating boiler by blowing out the float chamber?
- Rust in the gauge glass is an indication that:
- The most important rule in safe operation of steam boilers is to:
- A gradual increase in stack temperature is an indication of:
- Slight smoking during the start-up of a cold oil-fired boiler is caused by:
- Thermal shock to boilers can be reduced by:
- If your low pressure steam boiler was in service and you found that there was no water level showing in the gauge glass, your first action would be to:
- During the warm up period of a heating boiler, the main burner goes out. The operator should:
- It is vitally important to slowly heat up a cold boiler to prevent:
- It is very important that boilers should be:
- Before starting up a new boiler or one that has been out of service the following must be ensured:
- While warming up an additional hot water heating boiler in preparation to put into service with other boilers, which of the following is true?