Fire in fuel gas pipelines is extinguished most effectively by _________________?

Related Mcqs:

1. The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law)____________________?

   A. V1/V2
   B. V2/V1
   C. V1 – V2
   D. V1.V2

2. The density of a gas ‘X’ is twice that of another gas ‘Y’. If the molecular weight of gas ‘Y’ is ‘M’; then the molecular weight of the gas ‘X’ will be________________?

   A. 2M
   B. M/2
   C. M
   D. M/4

3. Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the___________________?

   A. Nature of the liquid
   B. Nature of the gas
   C. Temperature of the liquid
   D. Total pressure

4. White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_______?

   A. Tar
   B. Sulphide Coke
   C. Coke Oven Gas
   D. Pulverised coke

   Submitted by: Muhammad Mutsadiq Umer

5. Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is__________________?

   A. Inversely proportional to viscosity of gas
   B. Proportional to the viscosity & density of the gas
   C. Proportional to the pressure of the gas
   D. Both B. and C.

6. The compressibility factor for an ideal gas is 1. Its value for any other real gas is_______________?

   A. 1
   B. 1
   D. Either B. or C, depends on the nature of the gas

7. While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is _______________?

   A. Infinity
   B. Unity
   C. Constant
   D. Negative

8. Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are_______________?

   A. Always greater than one
   B. Same at the same reduced temperature
   C. Same at the same reduced pressure
   D. Both B. & C

9. The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the ____________ temperature?

   A. Critical
   B. Boyle
   C. Inversion
   D. Reduced

10. The temperature of a gas in a closed container is 27° C. If the temperature of the gas is increased to 300° C, then the pressure exerted is___________________?

    A. Doubled
    B. Halved
    C. Trebled
    D. Unpredictable