Question 43General Subjects - 1st Asst/Chief70% to pass
Where a two-stage air ejector set is used in a two-stage flash evaporator, the first-stage air ejector takes suction from the second stage of the evaporator, and the second stage air ejector _______________.
AI Explanation
The correct answer is C) takes suction from the first stage ejector discharge.
In a two-stage flash evaporator system, the first-stage air ejector takes suction from the second stage of the evaporator, while the second-stage air ejector takes suction from the discharge of the first-stage ejector. This arrangement allows the second-stage ejector to further reduce the pressure in the system, improving the overall efficiency of the evaporation process.
The other options are incorrect because: A) the first-stage ejector takes suction from the second stage, not the first stage; B) the second-stage ejector does not take suction from the second stage as well, but rather from the first-stage ejector discharge; and D) the second-stage ejector is an active component of the system, not a standby unit.
Related Questions
#41 Regarding the low pressure evaporator steam control orifice in the live steam supply line, the steam at the outlet of the orifice if not properly conditioned will be developed as _______________.#42 Under normal operating conditions, the highest temperature and pressure conditions existing for flash-type evaporators will occur in the _______________.#44 The temperature of the steam flow to the saltwater feed heater, in a flash type evaporator can be manipulated by a/an _______________.#45 The brine level in the second-stage of a flash-type evaporator is determined in part by the feed rate, the rate of evaporation in both stages, and the _______________.#46 Steam supply for the operation of the low pressure evaporators may be obtained directly from the _______________.