Some Types of Explosionproof Enclosures Are Designed to Be Drilled

question 3

Multiple Choice

Some types of explosionproof enclosures are designed to be drilled and tapped in the field. When this is done, at least________ full threads should be engaged between the conduit and the enclosure.

• A) three
• B) five
• C) seven
• D) 11

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Definitions:

Decimal Equivalent

A decimal number that represents the same value as a given fraction or percentage.

Percent Equivalent

The fractional amount expressed as a part of one hundred.

Compound Interest

This form of interest computation involves calculating interest on both the initial principal amount and any interest that has accrued in the past periods on a loan or deposit.

Percent Equivalent

The numeric representation of a ratio or fraction as a part of 100.