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Trade Math 1st Period UA 636 Exam Questions & Verified Answers | Steel & PVC Pipe, Pipe Sizing, Flanges, Bolts, Valves, Gaskets, Fittings, Pressure Ratings, Pipe Schedules, ID/OD & Piping Fundamentals | Updated 2026/2027 | Instant Download

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Trade Math – 1st Period – UA 636 Exam Questions & Verified Answers covering essential piping, pipefitting, valve, flange, fitting, and mechanical-joint concepts. This exam-focused resource is designed for students and apprentices reviewing foundational trade knowledge involving pipe dimensions, materials, pressure ratings, fittings, valves, bolting, gaskets, and piping components. Topics covered include: • Standard steel pipe lengths • Steel pipe sizing and nominal inside diameter • ID and OD terminology • PVC and CPVC temperature and pressure ratings • PVC pipe schedules and threading • Lap joint flanges and their applications • Orifice flanges for flow measurement • Stud bolts vs. machine bolts • Pipe plugs and caps • Pipe threading dies and chasers • Flanged joints and gasket installation • Victaulic gasket selection • Check valves and prevention of reverse flow • Pipe dope and thread lubricant application • Pressure regulators • Gate valves and shutoff applications • Globe and angle valves for regulating flow • WOG and S valve markings • Valve selection based on pressure, temperature, fluid, and operating conditions • Pipe saddles and high-temperature piping applications • Mild steel pipe schedules • Mechanical joints and coupling/gasket assemblies • Piping components and trade terminology Ideal for UA 636 students, pipefitting apprentices, plumbing and piping students, skilled-trades learners, and anyone reviewing first-period trade fundamentals. The material provides a focused review of commonly tested piping terminology, component identification, specifications, and practical applications.

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Trade Math - 1st Period
- UA 636 Exam
Questions Provided
with A+ Graded
Answers |Latest
Updated 2026

, 21 ft.


What length is steel pipe typically found in?


1/8"-12" by nominal ID
12"+ by OD


How do you identify the size of steel pipe?


Pvc: 100 F (pressure), 180 F (non pressure)
Cpvc 180 F @ 100 psig


What are the typical pvc and cpvc temperature and pressure ratings?




Lap joint flanges are used on piping equipped with lap joint stud ends or with lapped
pipe. These flanges slip over the pipe and are not welded or otherwise fastened to it,
bolting pressure is transmitted to the gasket by the pressure of the flange against the back
of the pipe lap


What is a lap joint flange and what is it used for?



Orifice flange


What type of flange do we use to measure flow?

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