Question 27General Subjects - QMED
70% to passWhich of the following system applications would require the use of a siphon tube (pigtail) to prevent gauge damage?
AHydraulic oil pressure
BHeavy fuel oil
CCompressed air pressure
DSteam pressure
AI Explanation
The correct answer is D) Steam pressure. The use of a siphon tube (pigtail) is required for steam pressure gauge systems to prevent gauge damage. Steam pressure can fluctuate rapidly, and the siphon tube helps dampen these pressure variations, protecting the sensitive gauge mechanism. In contrast, hydraulic oil pressure (A), heavy fuel oil (B), and compressed air pressure (C) systems do not typically require siphon tubes, as these fluids and gases do not exhibit the same rapid pressure variations as steam.
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