Which of the Following Is True of Making a Proper

question 22

Multiple Choice

Which of the following is true of making a proper stop?

• A) You should slightly taper down the molten weld pool by flashing the torch off.
• B) Flashing the torch off prevents the molten weld pool from solidifying.
• C) If the flame is removed too late from the molten weld pool, it will rapidly oxidize.
• D) Pockets of oxides add strength to the weld.

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Definitions:

Genetic Variation

The diversity of gene frequencies within a population, which drives evolution by enabling adaptation to changing environments.

Heritability

The proportion of observed variation in a particular trait, within a population, that can be attributed to inherited genetic factors as opposed to environmental influences.

Genome Wide Association

A study approach that involves rapidly scanning markers across complete sets of DNA, or genomes, of many people to find genetic variations associated with a particular disease.

Quantitative Trait Locus

A Quantitative Trait Locus (QTL) is a region of DNA that is associated with a particular phenotypic trait, which varies in degree and can be attributed to polygenic effects.