MCC-NH Gas Fitters Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the MCC-NH Gas Fitters Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Why must the annular space around gas piping be sealed when passing through an exterior wall?

To reduce noise
To provide a decorative finish
To prevent entry of water, insects, and rodents
To allow for expansion and contraction

The correct answer is: To prevent entry of water, insects, and rodents

Sealing the annular space around gas piping when it passes through an exterior wall is crucial primarily for preventing the entry of water, insects, and rodents. This sealing helps to maintain the integrity of the structure by blocking potential pathways for moisture intrusion, which could lead to water damage, mold growth, and deterioration of building materials. Additionally, it creates a barrier that keeps pests from accessing the interior of the building, contributing to hygiene and safety. While other aspects such as noise reduction or expansion and contraction might be relevant in different contexts, the primary concern with sealing the annular space in this scenario specifically pertains to protecting against environmental factors and ensuring that the building remains secure and safe from external elements.