19. Which of the following statements is correct regarding the start-up operation of a non-condensing turbine-driven feed pump?

Keep the pump casing vent valve closed until flow is established through the pump.
Secure all drains prior to admitting any steam to avoid damage to traps.
Keep the steam exhaust valve closed until steam is applied to ensure that the auxiliary exhaust line pressure does not drop.
Open the pump suction valve prior to admitting steam to the turbine.

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