Why should a DMM be used for circuit testing instead of older analog meters?
A. A DMM is more accurate.
B. Analog meters can damage solid-state components.
C. DMM have many more useful features.
D. Analog meters are more difficult to read.
Answer: B
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a. graphite b. silicon c. copper d. platinum
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A multiple evacuation means that ____.
A. you connect three vacuum pumps simultaneously to a refrigeration system and pull a vacuum B. you pull a vacuum on three different systems at the same time C. you pull a vacuum on a refrigeration system more than once, allowing refrigerant or nitrogen into the system between each procedure D. there must be more than one system operating before a vacuum can be pulled
The ____ valve is recommended for applications where small pressure drops across its restrictor is desired.
A. single-seated B. double-seated C. three-way D. butterfly