Hornbill Industrial Training Mock Compex Online Exam

60 Questions | Total Attempts: 11638

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Hornbill Industrial Training Mock Compex Online Exam

Hornbill Industrial Training provides CompEx training and certification, including CompEx Gas/Vapour, Dust, Mechanical, Refresher, Responsible Persons and Foundation courses. This is a Hornbill Industrial Training Mock CompEx Online Exam.


Questions and Answers
  • 1. 
    The Atex 95 Directive is concerned with:
    • A. 

      The health and safety of workers

    • B. 

      The electricity at work act

    • C. 

      The design and trade of explosion protection equipment

    • D. 

      Standardisation of electrical voltages

  • 2. 
    ATEX divides equipment into groups and categories. What are they?
    • A. 

      Group I - categories 1,2,3

    • B. 

      Group II - Categories 1,2,3

    • C. 

      Group III - Categories 1,2,3

    • D. 

      Group IIII - Categories 1,2,3

  • 3. 
    IEC divides equipment into Equipment Protection Levels EPLs. What are they?
    • A. 

      Ga, Gb, Gc

    • B. 

      Gd, Ge, Gn

    • C. 

      Gia, Gib, Gic

    • D. 

      Gx, Gy, Gz

  • 4. 
    Which is the ATEX installation standard?
    • A. 

      IEC 60079-0

    • B. 

      IEC 60079-10

    • C. 

      IEC 60079-14

    • D. 

      IEC 60079-17

  • 5. 
    Which gas group includes Hydrogen:
    • A. 

      I

    • B. 

      IIA

    • C. 

      IIB

    • D. 

      IIC

  • 6. 
    Which of the following is not needed for combustion to occur:
    • A. 

      Ignition source

    • B. 

      Fuel supply

    • C. 

      Enclosure

    • D. 

      Oxygen

  • 7. 
    A vapour will ignite without an ignition source when it reaches it's:
    • A. 

      Flash point

    • B. 

      Fire point

    • C. 

      Ignition temperature

    • D. 

      Boiling point

  • 8. 
    What is the design ambient temperature if not marked on the equipment:
    • A. 

      -10oC to +20oC

    • B. 

      -20oC to +40oC

    • C. 

      -30oC to +60oC

    • D. 

      -40oC to +80oC

  • 9. 
    What does the T rating of equipment represent?
    • A. 

      The equipment will reach this temperature in normal operation

    • B. 

      The equipment will reach it's flash point in normal operation

    • C. 

      The relevant surfaces of the equipment will not reach this temperature in normal operation

    • D. 

      The equipment will exceed the temperature rating in normal operation

  • 10. 
    An explosive vapour is LIKELY present. What would be the zone classification:
    • A. 

      Zone 0

    • B. 

      Zone 1

    • C. 

      Zone 2

    • D. 

      Zone 20

  • 11. 
    On an area classification drawing what would represent Zone 1:
    • A. 

      Circles

    • B. 

      Cross hatching

    • C. 

      As symbols shown on the drawing

    • D. 

      Slanted lines

  • 12. 
    What is the international abbreviation that corresponds to ATEX
    • A. 

      API

    • B. 

      TAT

    • C. 

      EPL

    • D. 

      IEC

  • 13. 
    What letters are used by the IEC for Equipment protection levels:
    • A. 

      A,b,c

    • B. 

      A,B,C

    • C. 

      W,x,y

    • D. 

      C,B,E

  • 14. 
    Under ATEX 137 where can Category 2 equipment be used:
    • A. 

      Zones 0, 20

    • B. 

      Zones 1, 21 and lesser zones

    • C. 

      Zones 2, 22 only

    • D. 

      Zones 20, 21 and 22 only

  • 15. 
    According to the IEC 60079 where can Ex n equipment be installed:
    • A. 

      EPL Gb, Category 2G area

    • B. 

      EPL Ga, Category 1G area

    • C. 

      EPL Gc, category 3G area

    • D. 

      EPL Da, Category 1D area

  • 16. 
    Which protection types can be used in an area requiring EPL Ga and category 1G
    • A. 

      Ex d

    • B. 

      Ex e

    • C. 

      Ex ia

    • D. 

      Ex ib

  • 17. 
    An area requires Ex ia equipment to be installed. What area classification could be given:
    • A. 

      EPL Ga, Gb or Gc - categories 1G, 2G or 3G

    • B. 

      EPL Gb or Gc - Categories 2G or 3G

    • C. 

      EPL Gc - Category 3G only

    • D. 

      EPL Ga - Category 1G only

  • 18. 
    What equipment can be installed in a Hydrogen environment requiring EPL Gc, Category 3G
    • A. 

      Ex d IIA T6

    • B. 

      Ex d IIB T3

    • C. 

      Ex n II T3

    • D. 

      Ex e IIA T4

  • 19. 
    What location can Ex n equipment be installed
    • A. 

      EPL Ga, Gb and Gc Categories 1G, 2G and 3G

    • B. 

      EPL Ga and Gb Categories 1G and 2G

    • C. 

      EPL Gb and Gc Categories 2G and 3G

    • D. 

      EPL Gc Category 3G only

  • 20. 
    An item of equipment marked Ex ib IIC T6 may be used in an area requiring:
    • A. 

      EPL Ga, Gb and Gc; Categories 1G, 2G and 3G; gas group IIA and IIB

    • B. 

      EPL Ga and Gb; Categories 1G and 2G; gas group IIB and IIC

    • C. 

      EPL Gb and Gc; Categories 2G and 3G; gas group IIC

    • D. 

      Any location and gas group

  • 21. 
    Cable glands installed into Ex n boxes after 2007 are required to be:
    • A. 

      Certified Ex d gland

    • B. 

      Certified Ex e gland

    • C. 

      Certified Barrier gland

    • D. 

      Certified to IEC 60079

  • 22. 
    An item of equipment marked II without an A, B or C can be used:
    • A. 

      The equipment is unsuitable for any area

    • B. 

      The equipment can only be used in IIA areas

    • C. 

      The equipment can be used in all gas group areas

    • D. 

      The equipment can only be used in IIB area

  • 23. 
    Cable glands installed into Ex e boxes after 2006 are required to be:
    • A. 

      Certified Ex d gland

    • B. 

      Certified Ex n gland

    • C. 

      Certified Barrier gland

    • D. 

      Certified to IEC 60079

  • 24. 
    What are the requirements of threaded entry into an Ex d enclosure:
    • A. 

      Three fully engaged threads

    • B. 

      Five fully engaged threads

    • C. 

      Eight fully engaged threads

    • D. 

      Ten fully engaged threads

  • 25. 
    What would be required to terminate SWA cable into an Ex e steel enclosure with 10mm threaded entry:
    • A. 

      Fit gland, earth tag, star washer and lock nut

    • B. 

      Fit gland, IP washer and lock nut

    • C. 

      Fit gland

    • D. 

      Fit gland, IP washer and star washer

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