Question 43General Subjects - 1st Asst/Chief

70% 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 _______________.

Atakes suction from the first stage of the evaporator

Btakes suction from the second stage of the evaporator as well

Ctakes suction from the first stage ejector discharge

Dis normally idle and used mainly as a standby unit

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.

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

Get the App