Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner ?

Related Mcqs:

1. The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge) ?

   A. x1.5
   B. x0.8
   C. x-1.5
   D. x-0.8

2. 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

3. A jet engine turbine blade is normally manufactured by____________________?

   A. Forging
   B. Shell moulding
   C. Investment casting
   D. Pressure die casting

4. The pressure outside a bubble/droplet of liquid is ________________ the internal pressure?

   A. Greater than
   B. Less than
   C. Equal to
   D. Unpredictable; depends on the bubble size

5. A high pressure boiler generates steam at a pressure greater than _____________________ kg/cm2 ?

   A. 10
   B. 30
   C. 50
   D. 80

6. Gage pressure within a spherical droplet of a fluid is ‘p’. What will be gage pressure within a bubble of the same size & of the same fluid ?

   A. p
   B. 2 p
   C. 0.5 p
   D. 0.25 p

7. The delivery pressure of boiler feed water pump compared to the boiler steam pressure is___________________?

   A. Same
   B. Slightly less
   C. Slightly more
   D. Much more

8. Latent heat of dry steam at atmospheric pressure is 539 Kcal/kg; which _____________ with increase in the pressure of steam?

   A. Decreases
   B. Increases
   C. Remain same
   D. May increase or decrease

9. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of _______________ steel bars?

   A. Hot rolled mild
   B. Cold rolled mild
   C. Forged
   D. Machinable stainless

10. A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is ________________ W/m2 °C ?

    A. 50
    B. 100
    C. 150
    D. 200