Under EMERGENCY operating conditions, the proper valve positions for controlling feed water to the boiler should be the __________.

Correct Answer: Option D — auxiliary stop valve fully open and the auxiliary stop-check valve used to regulate the amount of flow

During emergency operations where automatic regulators fail, the auxiliary stop valve is held fully open to ensure an unrestrictive supply path, while the auxiliary stop-check valve is manually throttled to precisely control feed water flow into the boiler drum.