Which of the Following Statements Concerning the Use of Hydrocarbons

question 74

Multiple Choice

Which of the following statements concerning the use of hydrocarbons as fuels is not correct?

• A)The alkane n-octane has an octane number of 100 which indicates its high performance in automobile engines.
• B)Catalytic cracking converts straight-chain hydrocarbons that are poor fuels into branched-chain compounds.
• C)When poor fuels are used in an engine,combustion can occur before the spark plug fires which results in knocking.
• D)The quality of a fuel is indicated by its octane number,and a higher octane number typically results in less engine knocking.
• E)none of the above

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Definitions:

Renal Pelvis

The central collecting region in the kidney where urine gathers before flowing into the ureter.

Renal Column

Cortical tissue in the kidney that extends between the renal pyramids.

Simple Cuboidal

A type of epithelial tissue composed of a single layer of cube-shaped cells, often engaged in secretion and absorption.

Microvilli

Tiny, finger-like projections on the surface of some cells that increase their surface area for absorption.