Exam 4: Cylinder Blocks and Crankshafts

Cylinder walls have a cross hatch finish made by:

Which of the following is NOT a type of dampener used on diesel engines?

Which of these is the ability of a bearing to conform to irregularities on a journal surface?

Which of these takes place when using a crossbolt design to strengthen the crankcase walls?

Two technicians are discussing diesel engine block design. Technician A says that the diesel's high cylinder pressure produces extraordinary vibration that requires a unique design. Technician B says that cylinder block has other major parts attached to it. Who is right?

The place where the amplitude of the wave form is reversed and formed by harmonic waves along the crank and are points of potential failures due to harmonic vibration is called the:

Which of the following is NOT an advantage of cast iron?

Which of the following is the manufacturer's purpose for core plugs?

What type of dampener uses balance shafts to cancel out rhythmic forces produced by long or uneven delays between firing impulses of an engine?

Two technicians are describing flywheel function. Technician A says that a flywheel provides a mounting surface for a clutch in the case of a manual transmission and a torque converter for automatic transmissions. Technician B says that flywheel shape and construction is the same for any type of clutch used, whether torsional dampening capabilities are built into the flywheel or not. Who is right?

Technician A says that a dual mass flywheel (DMF) is constructed of two major parts. Technician B says that DMFs are recognized by a series of springs located around the flywheel circumference. Who is right?

Technician A says that crankshaft end play is controlled by the fillet radius of the crankshaft journals. Technician B says that the main bearings limit crankshaft end play. Who is correct?

Crankshaft counterweights are used to minimize engine vibration caused by which of the following?

During the inspection of a dual-mass flywheel, you inspect the spring retainer for damage. What do you notice between the springs and nylon retainers that makes you recommend a replacement?

A ladder frame uses an additional block structure located between the cylinder block and the oil pan which incorporates the main bearing caps into one unit and is called a:

Technician A says that with each alternating power and compression stroke the crankshaft will slow and then accelerate several times during each revolution. Technician B says that camshaft and crankshaft speed variations are between 10% and 20% during each crank rotation. Who is right?

Two technicians are describing the crankshaft induction hardening process. Technician A says that to induction harden a crankshaft, the journal is wrapped in a coil of wire using high amperage with direct current passing through it. Technician B says that the journal surface will have current induced into it by mutual induction, much like the secondary winding of an ignition coil. Who is right?

When you add curves to the deep skirt crankcase walls to increase block rigidity, it is called:

What type of balance is achieved when the movement of one piston counterbalances the movement of another?

What type of dry-liner will use a counter bore machined into the block to accommodate the liner flange?