02 content in atmospheric air on volume basis is___________________?

Related Mcqs:

1. The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is__________________?

   A. less
   B. more
   C. equal
   D. may be less or more depending on temperature
   E. unpredictable

2. A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is___________________?

   A. 400 kg/cm2
   B. 4000 kg/cm2
   C. 40 x 105 kg/cm2
   D. 40 x 106 kg/cm2
   E. none of the above

3. What will be the volume of air at 327°C if its volume at 27°C is 1.5 m3/mt ?

   A. 3 m3/mt
   B. 1.5 m3/mt
   C. 18 m3/mt
   D. 6 m3/mt
   E. 0.75 m3/mt

4. 1 m of air at atmospheric condition weighs approximately__________________?

   A. 0.5 kg
   B. 1.0 kg
   C. 1.3 kg
   D. 2.2 kg
   E. 3.2 kg

5. For burning 1 kg of carbon to CO as per chemically correct combusiton, amount of air required is___________________?

   A. 1 kg
   B. 4/3kg
   C. 8/3kg
   D. 2 kg
   E. 16/3 kg

6. Primary air is the air used to__________________?

   A. provide air around burners for obtaining optimum combustion
   B. transport and dry the coal
   C. convert CO (formed in lower zone of furnace) into C02 at higher zone
   D. air-delivered by forced draft fan
   E. none ot the above

7. Tertiary air is the air used to____________________?

   A. provide air around burners for obtaining optimum combustion
   B. transport and dry the coal
   C. cool the scanners
   D. supply air for ignitors
   E. convert CO (formed in lower zone of furnace) into C02 at higher zone

8. Standard air is the air at_____________________?

   A. atmospheric conditions at any specific location
   B. 20°C and 1 kg/cm2 and relative humidity 36%
   C. 0°C and standard atmospheric conditions
   D. 15°C and 1 kg/cm2
   E. 25°C, 1 kg/cm2 and RH of 60%.

9. The specific fuel consumption for a petrol engine first decreases with increase in fuel air ratio and then increases with further increase in fuel air ratio. The minimum value occurs in the range of__________________?

   A. lean mixture
   B. chemically correct mixture
   C. rich mixture
   D. unpredictable
   E. none of the above

10. The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________________?

    A. lean mixture
    B. chemically correct mixture
    C. rich mixture
    D. unpredictable
    E. none of the above