AUT 102 Chapter 20 Week 6 Flashcard

Front

The piston rings must have ________ inside the piston groove to accommodate heat expansion of the piston.

Back

Back clearance

Front

Which of the following is the most common coating for pistons? Black moly coating, Iron oxide, Phenolic coating, None of the above

Back

Black moly coating

Front

If the piston skirt is worn, the piston may make a knocking noise referred to as "piston slap" due to _________.

Back

Too much clearance between the skirt and the cylinder wall

Front

To calculate the compression ratio, ________ the volume of the combustion chamber above the piston at BDC by the volume of the combustion chamber above the piston at TDC.

Back

Divide

Front

The ________ fits in the cylinder like a close-fitted, removable plug.

Back

Piston

Front

One bearing material, called ________ metal, is an alloy that can include metals such as tin, lead, aluminum, and copper.

Back

Babbit

Front

Main bearing caps mate to _______, which are smooth, curved, machined areas located at the bottom of the engine block.

Back

Journal saddles

Front

Some seals use a small spring, called a _______, around the inside of the sealing lip to tension the lip against the sealing surface of the crankshaft or harmonic balancer.

Back

Garter spring

Front

Which of these converts the reciprocating motion of the piston into rotary motion? The upper part of the engine block, The piston rings, The balance shafts, The crankshaft

Back

The crankshaft

Front

Technician A says crankshafts are internally balanced using counterweights. Technician B says crankshafts are externally balanced using counterweights. Who is correct?

Back

Both Tech A and B