In case of liquid petrofuels, momentary combustion is observed at its ________________________?

Related Mcqs:

1. Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100°F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is________________?

   A. 4
   B. 3
   C. 2
   D. 1

2. Testing of the knocking characteristics of petrofuels is done in a _________________ engine ?

   A. Carnot
   B. CFR (Co-operative fuel research)
   C. Stirling
   D. Diesel

3. Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about ________________ of that of water (i.e. 1 gm/c.c)?

   A. One fourth
   B. One third
   C. Half
   D. One eighth

4. Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatization by liquid SO2 extraction (Edeleanu process), its smoke point may become _______________________ mm?

   A. 5
   B. 10
   C. 25
   D. 100

5. Performance number of a liquid fuel is related to its __________________?

   A. Wax content
   B. Spontaneous ignition temperature
   C. Knocking tendency
   D. Sulphur content

6. Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is ________________?

   A. More than 100
   B. Round about 100
   C. Between 50 and 100
   D. Less than 25

7. Casing head gasoline is the liquid __________________?

   A. Butane
   B. Propane
   C. Natural gas
   D. Gasoline separated from wet natural gas by compression

8. Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ?

   A. Naphtha
   B. Petrol
   C. Kerosene
   D. Heavy fuel oil

9. Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to________________?

   A. Increase its smoke point
   B. Improve its oxidation stability
   C. Decrease the breathing loss
   D. None of these

10. H/C ratio (by weight) for the same number of carbon atoms is the highest in case of____________________?

    A. Aromatics
    B. Paraffins
    C. Olefins
    D. Naphthenes