Nitrogen System

Which of the following industry uses Nitrogen?

• Food Preservation

• Effluent Treatment

• Steam Generation

• Demineralization

Answer explanation

Nitrogen gas is also used to provide an unreactive atmosphere. It is used in this way to preserve foods.

What is system A known as?

• Back-up

• Coldbox

• Warm end container

• Refrigeration

Answer explanation

Warm end container

What is system B known as?

• Back-up

• Coldbox

• Warm end container

• Refrigeration

Answer explanation

Coldbox

What is system C known as?

• Back-up

• Coldbox

• Warm end container

• Refrigeration

Answer explanation

Back up system

The concept of Nitrogen separation by cryogenic systems involves atmospheric air compressed by specific ___, often water cooled, to make it available for the system at  proper pressure.

• Air compressor

• Air chiller

• Pressure swing adsorption

• Dryer

• Cold box system

Answer explanation

Air compressor

The compressed air is then cooled using ___.

• Air compressor

• Air chiller

• Pressure swing adsorption

• Dryer

• Cold box system

Answer explanation

Air chiller

The next step is the ___. A two adsorbent bed is installed to remove water vapor, carbon dioxide and most other impurities from the air. The two adsorber towers operate alternatively, one being regenerated whilst the other is in service.

• Air compressor

• Air chiller

• Pressure swing adsorption

• Dryer

• Cold box system

Answer explanation

Pressure swing adsorption (PSA)

A ___ is used to further remove the water vapor and the dry air enters the cold box system.

• Air compressor

• Air chiller

• Pressure swing adsorption

• Dryer

• Cold box system

Answer explanation

Dryer

In the ___, the air is then distilled and the ascending vapour is separated into pure nitrogen at the top of the column and a mixture of liquid nitrogen and oxygen at the base of the column.

• Air compressor

• Air chiller

• Pressure swing adsorption

• Dryer

• Cold box system

Answer explanation

Cold box system

___ is a gas separation process whereby the gas molecules adhere to a surface when under pressure.

• Absorption

• Adsorption

• Diffusion

• Infusion

Answer explanation

Adsorption