Question 125Steam Plants - QMED70% to pass
A back pressure trip on a ship's service turbo-generator functions to trip the turbine under what circumstance?
AI Explanation
The correct answer is C) the amount of cooling water to the condenser is insufficient.
The back pressure trip on a ship's service turbo-generator is designed to protect the turbine from damage due to excessive back pressure. When the amount of cooling water to the condenser is insufficient, it can lead to a reduction in the rate of condensation, causing an increase in the back pressure in the turbine exhaust. This high back pressure can potentially damage the turbine, so the back pressure trip functions to automatically shut down the turbine in this circumstance.
The other options are incorrect because they do not directly relate to the primary function of the back pressure trip, which is to protect the turbine from excessive back pressure caused by insufficient cooling water to the condenser.
Related Questions
#123 Most auxiliary turbine feed pumps do not require an external source of gland sealing steam because they _______________.#124 The safety device provided on a turbo generator which closes the throttle automatically when the cooling water to the condenser is insufficient is called a/an _______________.#126 During high speed operation of the main turbine propulsion unit, the heat absorbed by the lubricating oil is removed by the _______________.#127 The lube oil coolers installed in a gravity lubricating oil system are located between the _______________.#128 According to the illustrated auxiliary steam and HP bleed steam system diagram, what are the characteristics of the steam supplied to the main feed pump drive turbines? Illustration SG-0005