Trade Theory Flashcards
7 cards from real AIT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Trade Theory flashcards as text
What is the purpose of installing expansion joints or expansion loops in piping systems?
Answer: To allow for thermal expansion and contraction of pipe without causing stress or damage
Expansion joints and loops accommodate the dimensional changes in piping caused by temperature fluctuations, preventing excessive stress, distortion, and potential failure of the piping system.
In electrical work, what is the function of a neutral conductor in a standard AC circuit?
Answer: To provide the return path for current back to the source
The neutral conductor provides the return current path from the load back to the power source, completing the circuit; in a balanced system, it carries the return current at close to zero voltage.
What is the main advantage of using a pneumatic (air-powered) tool over an equivalent electric tool on certain job sites?
Answer: Pneumatic tools can be used safely in wet or potentially explosive atmospheres
Pneumatic tools are safer in wet conditions and potentially explosive environments (such as painting areas or fuel storage) because they do not produce electrical sparks that could ignite flammable vapors.
In carpentry, what is the purpose of a 'king stud' in wall framing?
Answer: A full-length stud that runs continuously beside a window or door opening
A king stud is a full-height stud that runs from the bottom plate to the top plate directly beside a door or window opening, providing support for the header above the opening.
What does the term 'ampacity' refer to in electrical wiring?
Answer: The maximum current a conductor can continuously carry without exceeding its temperature rating
Ampacity is the maximum amount of electrical current a conductor or cable can carry continuously under stated conditions without exceeding its temperature rating or causing insulation damage.
When a journeyperson signs off on an apprentice's workbook hours, what are they confirming?
Answer: That the apprentice's recorded hours of on-the-job training are accurate and the work was performed
When a journeyperson signs an apprentice's logbook, they are verifying and attesting that the hours recorded are accurate and that the apprentice performed the work described under their supervision.
What is the primary reason for sloping a horizontal drain pipe in the correct direction and at the proper grade?
Answer: To allow waste and water to flow by gravity toward the sewer or septic system
Horizontal drain pipes must slope downward in the direction of flow so that gravity can move waste water and solids efficiently toward the sewer or septic system without relying on pressure.