Question 727Steam Plants - Assistant Engineer
70% to passAs shown in the illustration, piston "F" in the gland seal regulator is moved upward by _. Illustration SE-0019
Alube oil pressure
Bcontrol air
Cnitrogen
Dsteam pressure
AI Explanation
The correct answer is A) lube oil pressure. In a gland seal regulator, piston "F" is moved upward by the lube oil pressure. The lube oil pressure acts on the underside of the piston, pushing it upward and regulating the flow of fluid or gas through the regulator. The other options are incorrect because: B) Control air is used to actuate the regulator, but does not directly move the piston. C) Nitrogen is an inert gas that may be used in the regulator system, but does not directly move the piston. D) Steam pressure is not involved in the operation of a gland seal regulator.
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