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Chemical Engineering :: Chemical Engineering Basics-2

  1. Use of flux during soldering is done to

  2. A.

     Increase flidity of solder by lowering its melting temperature

    B.

     Prevent oxide formation

    C.

     Wash away surplus solder

    D.

     Full up the joint gap

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  3. "Internal energy of a gas obeying Vanderwall's equation of state, (p + a/v²)(V - b) = RT , depends upon its"

  4. A.

     Pressure & temperature

    B.

     Pressure & specific volume

    C.

     Temperature & specific volume

    D.

     Temperature only

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  5. The quantity of electricity required to deposit one gm equivalent of any substance is one

  6. A.

     Ampere

    B.

     Coulomb

    C.

     Microfaraday

    D.

     Faraday

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  7. Feed check valve is used in steam boilers to

  8. A.

     Check the water level in the boiler

    B.

     Check the feed water flow rate

    C.

     Feed high pressure water to boiler and guard against its backflow through it

    D.

     None of these

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  9. Function of blow down valve in a boiler is to

  10. A.

     Maintain the drum level

    B.

     Keep the drum pressure constant

    C.

     Drain out the sludge from the drum

    D.

     Empty the boiler during shutdown

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  11. Draft allowance given to patterns is for

  12. A.

     Compensating the liquid state shrinkage

    B.

     Easy removal of pattern from the mold cavity

    C.

     Providing support for the core placement

    D.

     Compensating the solidification shrinkage

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  13. Potable water means the water used for

  14. A.

     Fire-fighting

    B.

     Cooling

    C.

     Drinking

    D.

     Evaporation to produce steam

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  15. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm³) while the C.V. is same on weight basis (i.e., kcal/kg) ?

  16. A.

     Propane and acetylene

    B.

     Propane and LPG

    C.

     Sewage gas and gobar gas

    D.

     B.F gas and coke oven gas

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  17. The phenomenon of weld decay is found in case of

  18. A.

     Gun metal

    B.

     Brass

    C.

     Stainless steel

    D.

     Cast iron

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  19. A floating body oscillates about its __________ when it is displaced slightly.

  20. A.

     Centre of gravity

    B.

     Metacentre

    C.

     Centre of buoyancy

    D.

     Centre of pressure

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