The underground well of a bio gas plant is called the________________?

Related Mcqs:

1. Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?

   A. √T
   B. 1/√P
   C. √y
   D. 1/√ρ

2. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________?

   A. Occurs higher in the electro-chemical series of metals
   B. Is exemplified by magnesium plate
   C. Is much cheaper than the cathodic base material to be guarded against corrosion
   D. All A, B. & C.

3. Friction factor for fluid flow in pipe does not depend upon the________________?

   A. Pipe length
   B. Pipe roughness
   C. Fluid density & viscosity
   D. Mass flow rate of fluid

4. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the________________?

   A. Fatigue strength
   B. Creep strength
   C. Resilience
   D. Endurance limit

5. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the________________?

   A. Range is 15°F
   B. Approach is 10°F
   C. Both A. & B.
   D. Neither A. nor B.

6. A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its_______________?

   A. Aqueous tension
   B. Saturated humidity
   C. Vapor pressure
   D. Absolute humidity

7. Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that_________________?

   A. Pure oxygen has been used for combustion
   B. Nitrogen percentage in the fuel is very high
   C. Excess air has been used for combustion
   D. Hydrogen is not present in the fuel

8. Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________________ kJ ?

   A. +4000
   B. -4000
   C. 10000
   D. -10000

9. Induced draft fans provided in large thermal power plant boilers have __________________ blades?

   A. Forward curved
   B. Backward curved
   C. Double curved
   D. Radial or straight

10. The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?

    A. Water alkalinity & leakage
    B. Hydrazine addition during feed water treatment
    C. Release of non-condensable gas from water in the boiler
    D. Scale formation