Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is _______________ centistokes (or 100 Redwood I seconds) ?

Related Mcqs:

1. Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about _______________ °C ?

   A. 50
   B. 70
   C. 90
   D. 140

2. 1 centistoke is equal to ______________ Redwood I seconds?

   A. 1
   B. 4.08
   C. 0.408
   D. 40.8

3. Which of the following is not an important property of fuel oil/furnace oil ?

   A. Sulphur content
   B. Viscosity
   C. Aniline point
   D. Flash point

4. Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners ?

   A. PCM
   B. Tar
   C. Light diesel oil
   D. Low viscosity furnace oil

5. Crude petroleum oil is a _______________ fuel?

   A. Primary
   B. Fossil
   C. Both A. & B.
   D. Secondary

6. Crude oil produced by Indian oil fields are predominantly _______________ in nature?

   A. Paraffinic
   B. Naphthenic
   C. Asphaltic
   D. Mixed base

7. ________________ treatment is done for appreciable improvement in viscosity index of lubricating oil?

   A. Acid
   B. Solvent extraction
   C. Alkali
   D. Clay

8. Higher viscosity of lubricating oil usually signifies_______________________?

   A. Lower Reid vapour pressure
   B. Higher acid number
   C. Higher flash point and fire point
   D. Lower flash point and fire point

9. An upper limit of oil content is limited to about ______________ percent for achieving efficient and satisfactory level of wax sweating?

   A. 5
   B. 15
   C. 40
   D. 60

10. Fuel oil is subjected to visbreaking to reduce its_______________?

    A. Pour point
    B. Viscosity
    C. Pressure drop on pumping
    D. All A., B. and C.