Question

The formula of API degree is _______

(a) \(\frac{141.5}{specific\, gravity \,of \,oil\, at\, 60℉}\) – 13.15

(b) Specific gravity of oil-13.5

(c) \(\frac{141.5}{specific\, gravity \,of\, oil}\)+131.5

(d) \(\frac{specifc gravity of oil+41.31}{141.5} \)

I got this question in quiz.

I'm obligated to ask this question of Fuel Supply System in Ignition or Diesel Engine in chapter Ignition and Power Transmission of Farm Machinery

Answer 1

Correct option is (a) \(\frac{141.5}{specific\, gravity \,of \,oil\, at\, 60℉}\) – 13.15

Easy explanation: API gravity of water is 10. A high API gravity fail generally releases more heat per unit mass and vice versa for per unit volume.