Domestic Conn Quiz - Part-I

25 questions | Total Attempts: 74

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Domestic Conn Quiz - Part-I

This is a quiz to test the knowledge of the plumbing team working for Domestic Gas connections Installations at Gujarat Gas. It includes Technicall as well as HSSE related questions. For any query, please contact Mustak Patel on +919924120250


Questions and Answers
  • 1. 
    Isolation Valve in Domestic Installation is to be install in...
    • A. 

      Fall to open Direction

    • B. 

      Fall to close Direction

    • C. 

      Horizontal Direction

  • 2. 
    Identify the GI Pipe class for Domestic installation at GGCL 
    • A. 

      A Class

    • B. 

      B Class

    • C. 

      C Class

    • D. 

      Non of Above

  • 3. 
    Is Natural Gas haviour then Air?
    • A. 

      Yes

    • B. 

      No

    • C. 

      I dont know

  • 4. 
    Why do we do surface scrapping on PE Pipe before doing EF welding 
    • A. 

      To reduce pipe OD to insert properly in EF Fittings

    • B. 

      To remove oxide layer

    • C. 

      To prepare pipe outer surface for better EF welding

  • 5. 
    Test pressure of Gas installation up to regulator inlet is,
    • A. 

      3.50 Bar

    • B. 

      3.00 Bar

    • C. 

      2.00 Bar

  • 6. 
    Which are the properties of Natural Gas
    • A. 

      Flammable, Lighter then Air, colorless, testless, odorless

    • B. 

      Flammable, Highly toxic, Corrosive, bad odor, heavier then air

    • C. 

      Asphyxiate, colorless, testless, Corrosive, bad odor

  • 7. 
    Sp. Gravity of Natural Gas is  isiisis
    • A. 

      0.65 to 7.00

    • B. 

      0.85 to 1.00

    • C. 

      2.2 to 4.60

  • 8. 
    Flammability limits of Natural Gas is
    • A. 

      5% to 15%

    • B. 

      4% to 22%

    • C. 

      15% to 20%

  • 9. 
    Which chemical is added in Natural Gas as odourant?
    • A. 

      Methane

    • B. 

      Ethyl Mercaptan

    • C. 

      Iso propile alcohole

  • 10. 
    Which is the main element of Natural Gas?
    • A. 

      Methane

    • B. 

      Ethane

    • C. 

      LPG

  • 11. 
    What is the full form of OPSO for Pressure Regulator?
    • A. 

      Over Pressure Seal Off

    • B. 

      Over Pressure Shut Off

    • C. 

      Over Pipe Shut Off

  • 12. 
     Natural Gas leakage can cause  
    • A. 

      Asphyxiation, Global Warming, Fire, Explosion

    • B. 

      Poision, Fire, Aquatic organisms, Toxic

    • C. 

      Non of above

  • 13. 
    Full form of MDPE is
    • A. 

      Medium Density Poly Ethylyne

    • B. 

      Medium Degree Poly Ethylyne

    • C. 

      Medium Degree Polyster Ethylyne

  • 14. 
    Which Chemical is used to clean PE pipe before EF welding?
    • A. 

      Ethyl mercuptain

    • B. 

      Iso Propyl Alcohol

    • C. 

      Iso cynide alcohol

  • 15. 
    How much Surface Scratching or deep scoring is acceptable on PE pipe?
    • A. 

      Defect extends to > 10% of pipe wall thickness

    • B. 

      Defect extends to < 10% of pipe wall thickness

    • C. 

      2 mm

  • 16. 
    Which tool is mandatory while EF welding?
    • A. 

      Top load clamp

    • B. 

      MS road to adjust the saddle

    • C. 

      Pipe rounder

  • 17. 
    Max. Flow Rate of G-1.6 Domestic meter 
    • A. 

      1.6 Qubic Meter Per Hour

    • B. 

      0.16 Qubic Meter Per Hour

    • C. 

      2.5 Qubic Meter Per Hour

  • 18. 
    Generally which kind of threads is done in domestic plumbing?    
    • A. 

      BSP

    • B. 

      BSPT

    • C. 

      NPT

  • 19. 
    When OPSO shut-off the flow from Regulator ?  
    • A. 

      Down stream pressure increase from permissible limit

    • B. 

      Downstream pressure decrease from permissible limit

    • C. 

      Upstream pressure increase from permissible limit

  • 20. 
    Quantity of Fine sand bedding above and below PE pipe in Ground Connections is,
    • A. 

      100 mm above and 100 mm below

    • B. 

      100 mm above and 200 mm below

    • C. 

      200 mm above and 100 mm below

  • 21. 
    Max allowable working pressure of G-1.6 Domestic meter  
    • A. 

      0.02 bar

    • B. 

      2.2 Bar

    • C. 

      1.6 Bar

  • 22. 
    Above Which Pressure CRV (creep relief valve) of Domestic Regulator B-1.6 allow to pass gas ?  
    • A. 

      35 mBar

    • B. 

      21 mBar

    • C. 

      70 mBar

  • 23. 
    OPSO of Domestic Regulator B-1.6  shuts off at which pressure?
    • A. 

      70 mBar

    • B. 

      100 mBar

    • C. 

      240 mBar

  • 24. 
    Which equipment is used at GGCL for Working at height? 
    • A. 

      Twister

    • B. 

      PETZL

    • C. 

      Zula

  • 25. 
    Which coating is done at Inside surface of GI pipe used for Gas installation ?
    • A. 

      Zinc Coating

    • B. 

      Powder Coating

    • C. 

      Silver Coating

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