Deck 29: Engine Cleaning and Crack Detection

Question 1

Abrasive pads or discs should be used ________.

A)But clean the part thoroughly, to wash away the abrasive material
B)According to the specified grit size for the material being cleaned
C)On disassembled engine parts only
D)All of the above

Answer 1

All of the above

Question 2

What actually does the cleaning when using steam?

A)Pressure behind the steam
B)Heat from the steam
C)Abrasives used
D)Both A and B

Answer 2

Both A and B

Question 3

Aqueous-based cleaning means ________.

A)Abrasive-based
B)Water-based
C)Strong chemical-based
D)All of the above

Answer 3

Water-based

Question 4

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?

A)300° F (150° C)
B)600° F (315° C)
C)800° F (425° C)
D)Both B and C

Question 5

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

A)Stainless steel shot
B)Baking soda
C)Glass beads
D)Aluminum shot

Question 6

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

A)An acid is higher than 7 and a caustic is lower than 7 on pH scale
B)Both caustics and acids have a pH of 7 if rated according to distilled water
C)An acid is lower than 7 and a caustic is higher than 7 on pH scale
D)Pure water is a 1 and a strong acid is a 14 on the pH scale

Question 7

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

A)Cold soak tank
B)Hot soak tank
C)Hot vapor tank
D)Pyrolytic oven

Question 8

Magnetic crack inspection ________.

A)Uses a magnet to remove cracks from iron parts
B)Uses a fine iron powder to detect cracks in iron parts
C)Uses a black light to detect cracks in iron parts
D)Uses a red dye to detect cracks in aluminum

Question 9

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 10

Plugging can be used to repair cracks ________.

A)In cast-iron cylinder heads
B)Only in cast-iron blocks
C)In aluminum cylinder heads
D)In both cast-iron and aluminum cylinder heads

Question 11

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 12

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 13

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

A)pH materials
B)Caustic materials
C)Cleaning materials
D)Acid materials

Question 14

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 15

Technician A says that carburetor cleaner is one of the most common cold soak agents used in an engine reconditioning shop. Technician B says that a hydroseal is a layer of water on top of the solvent to prevent evaporation. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 16

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 17

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

A)Chemical solvents
B)Abrasive blasting
C)Brushing
D)Scraping

Question 18

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 19

Which crack detection technique requires the use of a blacklight?

A)Dye penetrant
B)Zyglo
C)Magnetic flux
D)None of these

Question 20

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?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B

Question 21

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

Question 22

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