Multiple Valve Engines Tend to Be More Efficient Than Engines

question 38

Multiple Choice

Multiple valve engines tend to be more efficient than engines with two valves per cylinder because:

• A) larger valve area improves the air flow in and out of the cylinder
• B) air velocity is increased-especially at low engine speed; this increases air flow
• C) smaller and lighter valves require less spring tension-less engine power is lost to spring opening drag
• D) all answers are correct

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Definitions:

Conversion Costs

Expenses incurred during the transformation of raw materials into finished products, specifically the sum of direct labor costs and manufacturing overhead costs.

First-In, First-Out

An inventory valuation method where the oldest stock is sold first.

Grinding Department

A specific section in a manufacturing process where grinding operations (material removal process) are performed.

Conversion Costs

Conversion costs are the costs required to convert raw materials into finished products. They include direct labor and manufacturing overhead, excluding the cost of raw materials.