Cooling and Boiler Water Quiz

What is the recommended pH range for boiler water to avoid corrosion?

• 5.0 to 6.5

• 6.5 to 7.5

• 7.5 to 8.5

• 10.5 to 11.0

Which chemical is commonly used to remove dissolved oxygen in boiler water?

• Sodium chloride

• Sodium bicarbonate

• Sodium sulfite

• Sodium hydroxide

What causes hardness in boiler water?

• Sodium and potassium ions

• Calcium and magnesium ions

• Chloride ions

• Phosphates

Why must oils be kept out of boiler water?

• They cause rust

• They cause foaming and sludge

• They increase pH

• They reduce alkalinity

What is the maximum recommended conductivity for boiler water?

• 1,000 µS/cm

• 3,000 µS/cm

• 6,000 µS/cm

• 10,000 µS/cm

Which of the following is used to neutralize calcium hardness in boiler water?

• Chlorides

• Phosphates

• Sulfates

• Nitrates

What is the ideal phosphate level in boiler water?

• 10–20 PPM

• 30–50 PPM

• 60–80 PPM

• 100 PPM

What is the effect of high alkalinity (above 700 PPM) in boiler water?

• pH drops

• Prevents corrosion

• Leads to metal embrittlement

• Improves conductivity

Which parameter is measured using a conductance test?

• Oil content

• Total dissolved solids

• Alkalinity

• Chloride content

What is the primary reason for monitoring dissolved oxygen in boiler systems?

• Improves pH

• Causes corrosion

• Forms sludge

• Affects phosphate levels