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The official CompEx Gas and Vapours (Ex01-Ex04) practice exam

The official CompEx Gas and Vapours (Ex01-Ex04) practice exam

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The official CompEx practice paper with example questions. 

This practice paper enables learners to fully prepare prior to undertaking the formal assessment.

This example paper helps learners preparing to undertake their Gas and Vapours (Ex01-Ex04) qualification providing the perfect revision aid. 

This practice paper is intended to support the underpinning knowledge learning of our Core Competency qualifications Ex01-04 and RPP. 

Learners can access the practice paper multiple times once purchased.

(Note: VAT Applied at checkout).

Target Audience

The practice paper provides a selection of example questions to prepare candidates for the Gas and Vapours (Ex01 - Ex04) knowledge assessment.


Please note: These are example questions and these exact questions do not feature in the formal assessment.


The practice paper is suitable for learners due to undertake the Gas and Vapours (Ex01-Ex04) qualification and assessment.  This practice paper can also be used by those wishing to refresh their hazardous area knowledge. 


This practice paper is intended to support the underpinning knowledge learning of our Core Competency qualifications Ex01-04 and RPP. 

Technical Information

System Requirements

The practice paper is completed online through LEDA (CompEx's Learning Management System).  It can be run on a computer, tablet or smart phone. For handheld devices we recommend a stable Wi-fi connection. Flash is not required.


Recommended minimum connection speed is 1.5 Mbps. If you experience problems while undertaking the practice paper, we recommend using the Google Chrome browser.



Access to online resources will be provisioned within two working days of purchase.

Shipping & Returns

Shipping is calculated at checkout and based upon the weight of the item/s that you order. We use Royal Mail 1st Class Signed For to distribute our products. Please note ID Cards and Certificates are customised items and are therefore non-refundable.

Note: Please allow 3 working days for delivery of Certificates and ID Cards following completion of verification

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Contact Us

CompEx Certification Limited

3rd Floor Redwither Tower
Redwither Business Park
Wrexham Industrial Estate
Wrexham UK
LL13 9XT

+44 (0) 1978 665410

  • Industry

    At CompEx, we know that safe working practices are beneficial for all businesses. The CompEx Scheme ensures that best practice in managing explosive atmospheres is implemented and maintained right from the start, which not only keeps workplaces, staff and assets safe, but also reduces risks and costs.

    From food and beverage or manufacturing businesses, to pharmaceutical and chemical production, or traditional power generation sectors such as oil and gas, CompEx offers a wide range of qualifications for a variety of industries which are suitable for those working in hazardous environments

  • CompEx Qualifications

    Whether you are starting a career as a newly qualified electrical operative working in a hazardous environment, looking to work in a new type of industry, or you are simply up-skilling and developing your knowledge about hazardous locations, CompEx offer a broad range of qualifications which are essential for improving workplace safety and competency within potentially hazardous environments.

    You can find out more by selecting one of the qualifications below or you can download our qualification documentation, which provides full details about each CompEx unit, including the key learning objectives and course content.