Petroleum Refinery Process Engineer Online Test - Set 18 - ObjectiveBooks

Petroleum Refinery Process Engineer Online Test - Set 18

Practice Test: Question Set - 18

1. Diesel index (an alternative index for expressing the quality of diesel) is
    (A) Determined by using a test engine
    (B) Not related to aniline point
    (C) Equal to cetane number plus 3
    (D) All (a), (b) & (c)

2. Choose the correct statement.
    (A) Octane number of i-octane is zero
    (B) Octane number of paraffins increases with increasing number of carbon atoms
    (C) Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms
    (D) The aromatics have lower octane number than naphthenes with same number of carbon atoms

3. Pick out the correct statement.
    (A) Paraffins have higher octane number than corresponding iso-paraffin
    (B) Paraffins have lower smoke point than aromatics
    (C) Suitability of kerosene as a fuel & as an illuminant may be determined by char value test
    (D) Aviation fuel should have very high cloud point

4. Flash point of motor gasoline may be around __________ °C.
    (A) 10
    (B) 45
    (C) 100
    (D) 150

5. Catalyst used in the catalytic cracking is
    (A) Silica-alumina
    (B) Silica gel
    (C) Vanadium pentoxide
    (D) Nickel

6. High aniline point of diesel indicates that, it
    (A) Is highly aromatic
    (B) Has a large ignition delay
    (C) Is highly paraffinic
    (D) Has a low diesel index

7. For gasoline, the flash point (<50°C) is determined by the
    (A) Abel apparatus
    (B) Pensky-Marten's apparatus
    (C) Saybolt chromometer
    (D) None of these

8. Which of the following has the lowest flash point of all?
    (A) Diesel
    (B) Kerosene
    (C) Petrol
    (D) Furnace oil

9. Main constituent of natural gas is
    (A) CH4
    (B) C2H2
    (C) C2H4
    (D) C2H6

10. Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol.
    (A) Waxes
    (B) Mercaptans
    (C) Asphalt
    (D) Diolefins

11. 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

12. Crude oil produced by Indian oil fields are predominantly __________ in nature.
    (A) Paraffinic
    (B) Naphthenic
    (C) Asphaltic
    (D) Mixed base

13. Mercaptans are
    (A) Low boiling sulphur compounds
    (B) Added in LPG cylinders to detect gas leakage by its smell
    (C) Undesirable in petrol, as they reduce its octane number
    (D) All (a), (b) and (c)

14. 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

15. Which of the following additives improves the cetane number of diesel?
    (A) Amyl nitrate
    (B) Ethyl mercaptan
    (C) Naphthenic acid
    (D) Tetra ethyl lead

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