Question

Which of the following statements regarding piston rings is false? Select one: a.
A compression ring prevents pressurized refrigerant from blowing past the piston into the crankcase.
b. The inner diameter of a piston ring is slightly larger than the piston diameter.
c. The ends of piston rings are beveled to allow overlap.
d. An oil ring prevents excess oil from entering the cylinder.

Answer 1

Compression ring prevents pressurized refrigerant from blowing past the piston into the crankcase is the false statement.

Answer: Option A

Explanation:

Compression rings seal the combustion chamber from crankcase and then transfer heat to the cylinder from the piston. The piston rings are present in an internal combustion engine or steam engine with multi functions. The functions of piston rings are,

• Ensuring the combustion chamber is tightly sealed as to reduce the loss of gas to crankcase .
• Promoting heat transfer from the piston to cylinder wall .
• Controlling engine oil consumption .
• Optimizing the proper quantity of oil between piston and cylinder wall.