Question 33Steam Plants - Assistant Engineer70% to pass
When operating with the auxiliary feed line, feed water flow is controlled _______________.
AI Explanation
The correct answer is B) manually by throttling the auxiliary feed stop-check valve.
When operating with the auxiliary feed line, the feed water flow is controlled manually by adjusting the auxiliary feed stop-check valve. This allows the operator to precisely control the amount of feed water entering the boiler, as the main feed water regulator is not active in this mode of operation.
The other answer choices are incorrect because: A) the main feed water regulator is not in control when using the auxiliary feed line, C) the auxiliary feed water regulator spring setting is not adjusted to control flow, and D) the economizer bypass does not automatically control feed water flow in this scenario.
Related Questions
#31 The main feed check valve functions to _______________.#32 A boiler feed stop valve must be mounted _______________.#34 If manual control of the water level in a steaming boiler is required, the proper method of control is with the auxiliary feed _______________.#35 Under EMERGENCY operating conditions, the proper valve positions for controlling feed water to the boiler should be the _______________.#36 While underway, vacuum in the main condenser is primarily caused by the _______________.