Exam 29: Engine Cleaning and Crack Detection

What actually does the cleaning when using steam?

Aqueous-based cleaning means ________.

Which crack detection technique requires the use of a blacklight?

Most chemical cleaners used for cleaning carbon-type deposits are strong soaps called ________.

Many cleaning methods involve chemicals that are hazardous to use. The least hazardous method is generally considered to be the ________.

Magnetic crack inspection ________.

Abrasive pads or discs should be used ________.

Technician A says that any normal chemical can be used to clean aluminum parts or components. Technician B says that most chemical cleaners are strong soaps called caustic materials. Who is right?

Technician A says that engine parts need to be be cleaned before a thorough test can be done to detect cracks. Technician B says that pressure testing can be used to find cracks in blocks or cylinder heads. Who is right?

Any internal part that has a crack or flaw should be replaced, not repaired.

A pyrolytic oven is used to clean parts; however, caution should be used to limit the temperature in order to prevent damaging engine parts. What are the maximum recommended temperatures?

Technician A says that an attendant must be present any time a pyrolytic oven is used. Technician B says that aluminum parts should be cleaned at a temperature greater than 600 deg F. Which technician is correct?

Technician A says that a wire brush is used mainly on aluminum engine parts. Technician B says that a wire brush is used mainly on cast iron engine parts. Which technician is correct?

Which media is best to use for cleaning parts, as it does not need to be thoroughly cleaned after using?

Technician A says that pressure testing involves injecting pressurized air into engine block water and oil passages. Technician B says that one pressure testing method involves injecting heated water and a dye into engine block water and oil passages. Which technician is correct?

Cleaning chemicals are usually either a caustic material or an acid material. Which of the following statements is TRUE?

Cracks in cast iron cylinder heads can easily be repaired by welding.

Technician A says that mechanical cleaning with scrapers or wire brushes can be used to remove deposits. Technician B says that steel wire brushes can be used to clean aluminum parts. Who is right?

All of the following are methods of mechanical cleaning EXCEPT ________.

Technician A says that the fluorescent penetrant test method can be used to detect cracks in iron, steel, or aluminum parts. Technician B says that the dye penetrant test can only be used with aluminum parts. Which technician is correct?