Question 98Steam Plants - Assistant Engineer70% to pass
Why is it necessary to have a relief valve protecting the deaerating feed tank from internal pressure?
AI Explanation
The correct answer is C) Because the tank receives high-pressure drains.
The deaerating feed tank is designed to remove dissolved gases from the boiler feedwater. Since the tank receives high-pressure drains from various components in the steam system, it needs to be protected by a relief valve to prevent the tank from exceeding its design pressure. This is a safety requirement specified in the regulations governing boiler and pressure vessel design.
The other options are incorrect because they do not accurately describe the purpose or function of the deaerating feed tank. The tank does not necessarily receive large amounts of water, auxiliary exhaust, or drain to the main condenser, so those would not be the primary reasons for requiring a relief valve.
Related Questions
#96 Vent condensers are usually an integral part of deaerating feed heaters and serve to condense _______________.#97 With the steam control valve wide open during normal operation, the rate of steam flow from the auxiliary exhaust steam line to the DC heater is actually a function of _______________.#99 To provide emergency feed water supply to a steaming boiler, if it becomes necessary to secure the DC heater, suction should be taken on the distilled water tank using the _______________.#100 High-pressure steam drains are normally discharged to the _______________.#101 During cold ship start-up, you should open the feed water outlet and condensate valves to a DC heater in order to _______________.