It Is Faster to Make the Root Weld Using the Downhill

question 25

Multiple Choice

It is faster to make the root weld using the downhill technique if ______________________.

• A) you can see all of the joint so you can follow it
• B) the root opening is narrow so the weld has something to support it
• C) the voltage is lowered by 5 to 10 volts
• D) the root opening is uniform and not too wide or narrow

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Definitions:

Natural Experiment

An experiment in which nature, rather than an experimenter, manipulates an independent variable.

Community Cohesiveness

The quality of forming a united group, characterized by mutual support, shared values, and a sense of belonging among community members.

Double-masked

In medical studies, a trial in which neither the participants nor the researchers know who belongs to the control group and who belongs to the experimental group.

Placebo

An inert substance or treatment which has no therapeutic effect, used as a control in testing new drugs.