AIT 3rd Year Steamfitter-Pipefitter Review – Apprenticeship Technical Theory and Trade Exam Preparation Guide

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AIT 3rd Year Steamfitter-Pipefitter Review – Apprenticeship Technical Theory and Trade Exam Preparation Guide

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AIT 3rd Year Steamfitter-Pipefitter Review – Apprenticeship Technical Theory and Trade Exam Preparation Guide

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AIT 3rd Year Steamfitter-Pipefitter Review – Apprenticeship Technical Theory and Trade Exam
Preparation Guide

The Vena Contract is? - ANS ✔✔The point of highest velocity and lowest pressure

Freeze protection system used on steam manifolds - ANS ✔✔Utilizes ambient sensors to
prevent freezing

Stop Valves on multiple boiler systems are required where? - ANS ✔✔Required on both supply
and return piping

Name the 5 basic weld joints - ANS ✔✔Butt, Corner, Tee, Edge, Lap (BCTEL)

What is the Piping drawings sequence? - ANS ✔✔Schematic, Flow, P&ID, Piping, Isometric,
Spool

GTAW electrodes are identified by? - ANS ✔✔Identified by a coloured band

Reverse Acting Control system with a NO valve will do what to flow when the system hits max
pressure? - ANS ✔✔Flow starts when the system hits max pressure

3 Piece Mitred fitting length calculation. Radius is 16 inches and angle required is 90 degrees.
What is the length of piece B? - ANS ✔✔90 degrees divided by welds required times 2= 22.5
degrees. 22.5 Tan = 0.414. 0.414x 16"= 6.624" (Piece A) times by 2 B = 13 1/4 inches

What is the first step when firing up a boiler? - ANS ✔✔Follow the manufacturer's instructions

Plasma cutting safety concern in comparison to gas-oxy cutting - ANS ✔✔electrical shock

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Uploaded on: May 11, 2026
Number of pages: 3
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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