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AUT 123 final Questions and Answers
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AUT 123 final Questions and Answers When removing cylinder heads, the fasteners should be removed in what order? The reverse order of tightening A long block can be made from a short block with the addition of ________. Cylinder heads and valve train The ridge at the top of the cyl...

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  • November 14, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • aut 123 final questions and answers
  • when removing cylinder heads the fasteners should
  • a long block can be made from a short block with t

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AUT 123 final Questions and Answers
When removing cylinder heads, the fasteners should be removed in what order? -
answer The reverse order of tightening

A long block can be made from a short block with the addition of ________. - answer
Cylinder heads and valve train

The ridge at the top of the cylinder ________. - answer Is caused by the fact that the
rings do not travel all the way to the top of the cylinder

Technician A says that a minor overhaul can often be done with the engine remaining in
the vehicle. Technician B says that a core is required for most remanufactured engines.
Which technician is correct? - answer Both technicians A and B

Technician A says that the connecting rod and main bearing caps should be marked
before removing to ensure that they can be reinstalled in the exact same location when
re-assembled. Technician B says that the tip of the valve stem should be filed before
removing valves from the cylinder head to help prevent damage to the valve guide. Who
is right? - answer Both technicians A and B

Technician A says that before removing the engine, the battery should be disconnected.
Technician B says to assist in reassembly, you should mark all unfamiliar hoses and
wires in the engine compartment. Who is right? - answer Both technicians A and B

Magnetic crack inspection ________. - answer Uses a fine iron powder to detect
cracks in iron parts

Technician A says that engine parts need to 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? - answer Both technicians A and B

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? - answer Technician A only

What should be installed and torqued to factory specifications before machining a
block? - answer Main bearing caps

After the engine block has been machined, it should be cleaned using ________. -
answer Soap and Water

The cylinder holes are called ________. - answer Bores

, Core plugs are also called ________. - answer Freeze Plugs

Cast-iron cylinder sleeves are either cast into the aluminum block during manufacturing
or pressed into the aluminum block. These sleeves are not in contact with the coolant
passages and are called ________. - answer Dry cylinder sleeves

When measuring a cylinder for wear, the most wear will be found at the ________. -
answer Top of cylinder

Grit or abrasives that remain after honing the cylinders can be removed by cleaning with
________ before assembling the engine. - answer Soap and water

A ________ can sometimes be installed in a cast-iron block to repair a worn or cracked
cylinder. - answer Cylinder sleeve

Normal oil pump pressure in an engine is ________ PSI. - answer 10-60

Two technicians are discussing oil pumps. Technician A says that many oil pumps are
driven directly off the front of the crankshaft. Technician B says that some are driven
from the distributor if the engine uses a distributor-type ignition system. Which
technician is correct? - answer Both technicians A and B

In typical engine lubrication systems, what components are the last to receive oil and
the first to suffer from a lack of oil or oil pressure? - answer Valve train components

Lower than specified oil pressure is measured on a high mileage engine. Technician A
says that worn main or rod bearings could be the cause. Technician B says that a
clogged oil pump pickup screen could be the cause. Which technician is correct? -
answer Both technicians A and B

Technician A says that lubricating oil forms a seal between the piston rings and cylinder
walls. Technician B says that the lubricating system helps cool engine parts. Who is
right? - answer Both technicians A and B

The oil pressure relief valve controls ________ oil pressure in the lubrication system -
answer Maximum

A forged crankshaft has a ________. - answer Wide parting lines

A typical V-8 engine crankshaft has ________ main bearings. - answer Five

If any crankshaft is ground, it must also be ________. - answer Polished

A bearing shell has a slightly larger arc than the bearing housing. This difference is
called ________. - answer Bearing spread

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