A. 1 to 5
B. 30 to 80
C. 250 to 350
D. 450 to 500
Related Mcqs:
- Vacuum maintained in the vacuum distillation tower of the crude distillation plant is about _______________ mm Hg (absolute)?
A. 5-10
B. 30-80
C. 150-250
D. 350-400 - The vacuum maintained in vacuum distillation unit for reduced crude is about _______________ mm Hg?
A. 1.2
B. 12
C. 120
D. 700 - The main use of heavy gas oil produced by the vacuum distillation unit is as a_____________________?
A. Blending component for kerosene
B. Blending component for petrol
C. Feedstock for fluid catalytic cracking unit
D. None of these - Crude oil is subjected to vacuum distillation in the last stage, because_________________?
A. High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may
decompose
B. Lighter/low boiling products are prone to thermal decomposition
C. High purity products can be obtained thereby
D. None of these - Pressure maintained in the high pressure primary tower of a three stage crude oil distillation system is about ______________ kg/cm2?
A. 1.5
B. 3
C. 6
D. 12 - Products drawn from the top to bottom of the crude oil distillation column has progressively increasing ___________________?
A. Boiling points
B. Molecular weight
C. C/H ratio
D. All A., B. and C. - Bottom product of atmospheric pressure crude oil distillation column is termed as________________?
A. Reduced crude
B. Heavy ends
C. Asphalt
D. Residuum - ____________ is not an important refinery process for upgrading the quality of lubricating oil ?
A. Deoiling
B. Solvent refining
C. Clay treatment
D. Hydro-treatment - Which of the following processes in oil refinery does not employ „cracking‟?
A. Coking
B. Visbreaking
C. Pyrolysis
D. None of these - A typical yield of diesel in straight run distillation of crude oil may be about ________________ percent?
A. 8
B. 18
C. 28
D. 35
