The specific gravity of diesel oil Is_________________?

Related Mcqs:

1. A metal with specific gravity of o floating in a fluid of same specific gravity a will____________________?

   A. sink to bottom
   B. float over fluid
   C. partly immersed
   D. be fully immersed with top surface at fluid surface
   E. none of the above

2. A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ?

   A. 0.5
   B. 0.4
   C. 0.515
   D. 0.5
   E. none of the above

3. High carbon content in diesel oil used for diesel engine leads to_________________?

   A. production of highly corrosive gases corroding the cylinder walls and exhaust system
   B. excessive engine wear
   C. damaging of both the storage tank and the engine
   D. deposition on engine parts
   E. none of the above.

4. The self-ignition temperature of diesel oil compared to petrol is_________________?

   A. higher
   B. lower
   C. same
   D. depends on quality of fuel
   E. unpredictable

5. Volatility of diesel fuel oil is_________________?

   A. minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
   B. temperature at which it solidifies or congeals
   C. it catches fire without external aid
   D. indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
   E. temperature at which it flows easily

6. A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is_________________?

   A. 1
   B. 5
   C. 7
   D. 6

7. In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of____________________?

   A. 250°C
   B. 500°C
   C. 1000°C
   D. 150CPC
   E. 2000°C

8. Ignition quality of diesel-fuel oil is expressed by an index called__________________?

   A. octane number
   B. cetane number
   C. calorific value
   D. carbon content
   E. ignition temperature

9. Sulphur content in diesel oil should not be more than_________________?

   A. 10%
   B. 5%
   C. 1%
   D. 0.1%
   E. 0.01%

10. The pour point of diesel oil must be_________________?

    A. lower than the coldest atmospheric temperature at which oil is to be pumped
    B. higher than above
    C. has no such relation
    D. more than 100°C
    E. none of the above