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Air Ejector Components Quiz

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Questions and Answers

Where should the vacuum retaining valve be installed to prevent the return of air to the condenser?

Before the second stage
Before the first stage
Before the third stage (correct)
At the exit of the third stage

What happens to the steam that condenses in the first and second stages of the air ejector?

It is compressed by the air ejector
It is sent to the drain cooler
It is reintroduced to the feed water system
It is returned to the condenser (correct)

Why are each subsequent stage of the air ejector generally smaller in size?

To maintain pressure as steam condenses (correct)
To allow for more cooling tubes
To increase the volume of air and steam
To decrease pressure at each stage

What material are the diffusers made of in the air ejector?

Industrial bronze (A) Signup and view all the answers

What is the relief valve in the air ejector made of?

Stainless steel blade reeds on a Monel seat (C) Signup and view all the answers

What are the components of an air ejector in a modern steam installation?

The diffuser, air and vapour suction, steam nozzle, operating steam supply, steam strainer, inter-cooler (C) Signup and view all the answers

How is air removed from the air ejector using steam?

Air enters the air ejector and is carried away by the steam (C) Signup and view all the answers

What is the optimal rate of compression to achieve the best resulting vacuum in the condenser?

8:1 (B) Signup and view all the answers

Why are most air ejector installations fitted with steam filters on the air ejector feed line?

To prevent clogging of the nozzle and maintain proper velocity of the steam to the diffuser (B) Signup and view all the answers

What vacuum level is typically desired in the condenser for optimal operation?

$28-29$" of Hg (A) Signup and view all the answers

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