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Chemical Engineering :: Chemical Engineering Basics-2

  1. Thermistors are used in __________ devices.

  2. A.

     Voltage measuring

    B.

     Temperature measuring

    C.

     Temperature compensating

    D.

     Both B & C


  3. More than 1000 tons refrigeration capacity plants are usually of __________ type.

  4. A.

     Vapour compression

    B.

     Vapour absorption

    C.

     Air refrigeration

    D.

     None of these


  5. The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

  6. A.

     Wetness

    B.

     Mass flow rate

    C.

     Both A & B

    D.

     Neither A nor B


  7. Addition of __________ in steel can help in increasing the depth of hardness.

  8. A.

     Nickel

    B.

     Chromium

    C.

     Vanadium

    D.

     Tungsten


  9. A solar cell converts the sunlight directly into __________ energy.

  10. A.

     Thermal

    B.

     Electrical

    C.

     Mechanical

    D.

     Chemical


  11. Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.

  12. A.

     Scratch

    B.

     Indentation

    C.

     Dynamic

    D.

     Rebound


  13. In case of fluid moving machineries, the relationship between saturation temperature and pressure decides the process of

  14. A.

     Water hammer

    B.

     Cavitation

    C.

     Flow separation

    D.

     Turbulent mixing


  15. Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to

  16. A.

     Avoid the overheating of the tubes & bellows which operate them to minimise error and damage

    B.

     Form a seal of water by steam condensate to fill the tube or bellows at the pressure being measured

    C.

     Both 'a' & 'b'

    D.

     Avoid the static head error introduced by steam entry


  17. Which of the following materials has the poorest electrical conductivity?

  18. A.

     Carbon

    B.

     Aluminium

    C.

     Silver

    D.

     Stainless steel


  19. Material having maximum density is

  20. A.

     Plutonium

    B.

     Osmium

    C.

     Titanium

    D.

     Uranium