POWER Heat Exchanger Maintenance Test Your Knowledge

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* 1. What are the most common types of heat exchanger failure?

Mechanical failures

Scale, mud and algae fouling

Chemically induced corrosion

All of the above

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* 2. True or false: Various marine growths or deposits can leave a film or coating on the surfaces of heat transfer tubes that restricts heat flow.

True

False

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* 3. True or false: Pitting corrosion only occurs in ferrous metals, not nonferrous metals.

True

False

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* 4. Condensate grooving can usually be reduced by doing which of the following:

Applying chemical algaecides

Placing impingement baffles in the inlet nozzle

Controlling condensate pH and dissolved gases

All of the above

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* 5. Common types of chemically induced corrosion failures include the following:

Pitting corrosion

Stress corrosion

Dezincification

Galvanic corrosion

All of the above

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* 6. True or false: pressure surges caused by steam or water hammering have been measured at levels up to 20,000 psi, which is high enough to rupture or collapse the tubing in a heat exchanger.

True

False