Exam 7: Engine Powertrain Components

Which of the following is a major advantage of using quiescent combustion dynamics in truck diesel engine?

Which of the following is generally a disadvantage of an articulating piston assembly when compared to an aluminum trunk piston?

What is Plastigage^TM used for measuring?

Which of the following features would be required in an aluminum alloy, trunk type piston when used in a commercial diesel engine application?

Which of the following identifies the correct companion cylinder pairings in an in-line 6-cylinder engine?

Which of the following piston types is likely to be cam ground?

Which of the following ring arrangements would be most common on current medium and large bore truck diesel engines?

What is diametrically opposite to the piston major thrust face?

Which of the following would be the most likely cause of a connecting rod tensile failure?

Which of the following best describes the sectional shape of a keystone ring?

Which of the following piston types is the most common in large bore highway diesel engines built after 2007?

Technician A says that Monotherm pistons feature a bushingless wrist pin bore. Technician B says that forged steel pistons are usually equal in weight to equivalent bore aluminum trunk pistons because much less material is used in their construction. Who is correct?

How would a Mahle Monotherm piston be described?

Technician A says that Monotherm pistons are manufactured with a much tighter fit to the liner bore than aluminum trunk pistons. Technician B says that Monotherm pistons do not require an oil spray jet aimed at the underside of the piston. Who is correct?

Technician A says that the upside of a piston ring is often identified by a dot. Technician B measures a ring end gap of 0.018 inch in 5-inch diameter cylinder bore and says that it almost certainly exceeds the OEM specification. Who is correct?

Which of the following do current forged steel trunk type pistons primarily depend on to lubricate the wrist pins?

What is the brand name ofthe largest manufacturer of forged steel trunk pistons used in commercial diesel engines?

What is used to retain friction bearings?

Where is a piston ring installed in the piston assembly?

A viscous type vibration damper shows trace fluid leakage. Which of the following is recommended?