QUESTION 1: A differential pressure transmitter LT-100 is used to monitor the level in a horizontal storage vessel V-100. The vessel holds hot water which is manually filled and drained by valves V-1 and V-2. The pressure taps on the vessel for LT-100 are 60 inches apart and the transmitter is mounted 10 inches below the bottom process tap. The transmitter’s process tubing is routed 10 feet horizontally before dropping vertically to the transmitter. The following data apply: Ambient temperature: 80°F (always) Normal Operating pressure: 100 psig (PIC-101) Normal operating temperature: 280°F (TIC-102) Seal fluid for reference leg of level transmitter: Specific gravity; = 0.8 at 60°F = 0.62 at 80°F = 0.32 at 280°F Boiling point = 520°F at 0 psig The other leg of the level transmitter contains process fluid. The span of the transmitter, in inches of water, is: (A) 19.2 (B) 37.2 (C) 55.7 (D) 60.0
Posted on: Sun, 06 Jul 2014 12:44:19 +0000
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