Engine Bottom End Question Preview (ID: 33659)
Review For Automotive Engines Bottom Components.
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A ________ is similar to a normal dry sleeve in that it too is not in direct contact with the water jacket.
a) Dry sleeve
b) Dry flange sleeve
c) Wet sleeve
d) None of the above
A typical dry sleeve is held in place by an _____________ with the cylinder walls.
a) Interface fit
b) interference fit
c) epoxy / glue
d) Both interface and interference fit
Piston compression rings must have proper?
a) end gap
b) back clearance
c) ring tension
d) All listed properties
Pistons can be coated with which of the following?
a) Black moly coating
b) Ceramic coating
c) Black moly or Ceramic coating
d) Pistons do not have coatings
Tech A says all main bearings and rod bearings are held in place by what is called bearing crush. Tech B says each main bearing receives its own oil under pressure from the oil hole in the main bearing saddle. Who is correct?
a) Tech A
b) Tech B
c) Both Tech A and Tech B
d) Neither Tech A nor B
Tech A says an oil hole in the main bearing saddle allows oil from the oil gallery to lubricate the main bearings. Tech B says bearings can be undersized or standard and are generally either trimetal or bimetal. Who is correct?
a) Tech A
b) Tech B
c) Both Tech A and Tech B
d) Neither Tech A nor B
Tech A says crankshaft bearings are split in two parts, each with a tang that fits into the bearing saddle cap. Tech B says a thrust bearing is used to limit end play movement of the crankshaft. Who is correct?
a) Tech A
b) Tech B
c) Both Tech A nor B
d) Neither Tech A nor B
Tech A says crankshafts are a one-piece casting or forging. Tech B says crankshafts can be machined out of billet. Who is correct?
a) Tech A
b) Tech B
c) Both Tech A nor B
d) Neither Tech A nor B
Tech A says heavy-duty and performance crankshafts do not use the nitridization process, which takes longer and is more costly. Tech B says most crankshafts use induction-hardened journal surfaces to give good wear qualities. Who is correct?
a) Tech A
b) Tech B
c) Both Tech A nor B
d) Neither Tech A nor B
Tech A says the asymmetrical design of some in-line four-cylinder and 90-degree V6 engines causes an inherent second-order vibration. Tech B says only V8 engines use one or two balance shafts to reduce vibrations from engine operation. Who is correct
a) Tech A
b) Tech B
c) Both Tech A nor B
d) Neither Tech A nor B
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