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. Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog ?

   A. Nitrogen oxides
   B. Hydrocarbons
   C. Both A. & B.
   D. Carbon monoxide

3. Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about ____________________?

   A. 9 : 1
   B. 17 : 1
   C. 23 : 1
   D. 29 : 1

4. Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be________________?

   A. 9.5 : 1
   B. 12.5 : 1
   C. 15.5 : 1
   D. 18.5 : 1

5. 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) ?

   A. Propane and acetylene
   B. Propane and LPG
   C. Sewage gas and gobar gas
   D. B.F gas and coke oven gas

6. Thermal efficiency of an internal combustion engine is around ______________ percent?

   A. 8
   B. 35
   C. 65
   D. 80

7. Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is ______________ Nm3 ?

   A. 0.5
   B. 1
   C. 1/3
   D. 2.5

8. Sudden fall of atmospheric pressure by a large amount is an indication of the_____________________?

   A. Rain
   B. Cold wave
   C. Storm
   D. Fair weather

9. Dew point temperature always gives an indication of the __________________ of the moist air ?

   A. Dryness
   B. Moisture content
   C. Coolness
   D. Latent heat

10. An abrupt and sudden fall in the reading of barometer is an indication of the____________________?

    A. Storm
    B. Rain
    C. Clear weather
    D. Cold wave