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Boiler Chemical Feed Systems Quiz

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Questions and Answers

What is the main purpose of a chemical feed system in a boiler operation?

To decrease the chemical costs in boiler water

To maintain a high-pressure, low-capacity pump

To reduce corrosion costs and equipment damage (correct)

To increase the steam quality

How can an inappropriately designed or inefficiently run feed system impact boiler operation?

It can cause poor steam quality

It can lead to an increase in corrosion costs (correct)

It can improve the efficiency of the boiler

It can result in lower chemical costs due to underfeeding

What type of pump is commonly used to supply necessary chemicals to the boiler water?

Gear pump

Motor-driven metering pump (correct)

Reciprocating pump

Centrifugal pump

Why should there be a check valve between the chemical feed pump discharge isolation valve and the shut-off valve at the boiler?

To prevent over-pressurizing of piping and fittings Signup and view all the answers

Why must a relief valve be installed on the discharge of the chemical feed pump?

To prevent over-pressurizing of piping and fittings Signup and view all the answers

What is the purpose of a shut-off valve next to the boiler in the chemical feed line?

To stop the flow of chemicals when needed Signup and view all the answers

Why should chemical feed pumps be checked regularly and maintained according to manufacturer recommendations?

To decrease corrosion costs and equipment damage Signup and view all the answers

What is used to adjust the pump stroke in the diaphragm chemical pump?

A knob with a calibrated dial Signup and view all the answers

How many solenoid-type pumps are shown in Figure 6(a) supplying different chemicals?

Four pumps Signup and view all the answers

What must be done before adding chemicals to the feeder according to the text?

Depressurize and drain the feeder Signup and view all the answers

What is the purpose of the bypass feeder shown in Figure 7?

To feed chemicals into the return line of a hot water circulating system Signup and view all the answers

What is the purpose of wearing proper PPE when handling the feeder as per the text?

To avoid chemical exposure and burns Signup and view all the answers

What prevents some pumps from operating according to the text?

Boiler feedwater flow Signup and view all the answers

What feature does the chemical shot feeder shown in Figure 8 have, according to the text?

A pressure gauge and a vent Signup and view all the answers

What does Figure 6(b) show in relation to one of the pumps?

The flow measurement and stroke adjustment Signup and view all the answers