Question

1. suitable arc welders for farm use are *

a.) fairly easy to use
b.) relatively inexpensive
c.) reliable
d.) all of these
6.) the output of a welder is relatively *
a.) low voltage and high amperage
b.) high voltage and low amperage
c.) high voltage and high amperage
d.) low voltage and low amperage
7.) types of polarity on dc welders include *
a.) reversed
b.) straight
c.) both of these
d.) none of these

Explanation:

• Question 5: Farm - use arc welders need to be easy to use (farmers may not be highly - trained welders), relatively inexpensive (to fit farm budgets), and reliable (to handle farm - related welding tasks without frequent breakdowns). So all the characteristics (A, B, C) are valid.
• Question 6: Welders are designed to have low voltage (for safety in the welding environment) and high amperage (to generate enough heat for welding).
• Question 7: DC welders have two types of polarity - straight (electrode negative) and reversed (electrode positive).

Answer:

1. D. all of these
2. A. low voltage and high amperage
3. C. both of these