Key Skills and Knowledge Areas Flashcards
7 cards from real STEAMFITTER practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Key Skills and Knowledge Areas flashcards as text
What is the correct bolt torque sequence when assembling a gasketed pipe flange?
Answer: Tighten in a cross (star) pattern
A cross or star pattern ensures even compression of the gasket and prevents distortion of the flange faces.
Which type of valve is best suited for throttling (regulating) steam flow in a process system?
Answer: Globe valve
Globe valves are designed for throttling service because their disc moves perpendicular to flow, allowing fine flow control.
A pipe hanger spacing chart specifies 10-foot maximum spans for 2-inch carbon steel pipe. What is the consequence of exceeding this span?
Answer: Excessive pipe sag causing condensate pooling and possible failure
Spans that are too large allow pipes to sag, creating low points where condensate collects, risking water hammer and structural stress.
What is the purpose of a trap on a steam condensate return line?
Answer: To discharge condensate while retaining live steam
A steam trap automatically removes condensate and non-condensable gases from the system without allowing live steam to escape.
When performing a hydrostatic pressure test on a newly installed piping system, the test pressure is typically set at what value?
Answer: 1.5 times the design pressure
ASME B31.1 and B31.3 codes typically require hydrostatic test pressure to be 1.5 times the design (maximum allowable working) pressure.
Which type of gasket material is most appropriate for saturated steam service at 300°F and 70 psi?
Answer: Spiral wound stainless steel with flexible graphite filler
Spiral wound metallic gaskets with flexible graphite filler are rated for high-temperature steam service and provide reliable sealing.
What does 'P&ID' stand for and what is its primary use in pipefitting work?
Answer: Piping and Instrumentation Diagram — shows system components, flow paths, and controls
A P&ID (Piping and Instrumentation Diagram) is the primary engineering document showing all pipes, equipment, valves, and instrumentation in a process system.