Question 648Steam Plants - Assistant Engineer
70% to passWhich of the following is used to hold the poppet valves closed in a turbo-generators nozzle control speed regulator?
AOil pressure
BSprings
CLifting beam
DSteam pressure
AI Explanation
The correct answer is D) Steam pressure. In a turbo-generator's nozzle control speed regulator, the poppet valves are held closed by the steam pressure. The steam pressure acts on the poppet valves, providing the necessary force to keep them closed and maintain the desired speed of the turbo-generator. This is the primary mechanism used to regulate the speed of the turbo-generator. The other options, such as oil pressure (A), springs (B), and a lifting beam (C), are not typically used to hold the poppet valves closed in this type of speed regulator. The steam pressure is the key factor that controls the poppet valves and, consequently, the speed of the turbo-generator.
Related Questions
Q488:The most harmful slag forming compounds found in fuel oils are _______________. Q622:In the operation of a lube oil clarifier, the position of the oil/water interfac... Q735:The primary source of steam to the auxiliary exhaust system is typically supplie... Q318:Which of the following represents a significant system limitation to be aware of... Q7:The advantage of a counter flow fuel oil heater, as compared to a parallel flow ...
Ready to test your knowledge?
Take a Steam Plants - Assistant Engineer Practice ExamOfficial Resources