BE 2025-26 PRT Module 2 Quiz

How we can find out the deg. API of crude

• Deg. API = (141.5/ρ) – 131.5

• Deg. API = (131.5/ρ) – 121.5

• Deg. API = (131.5/ρ) – 141.5

• Deg. API = (121.5/ρ) – 131.5

In TBP apparatus why we use vacuum?

• To get fractions in less time

• To avoid the thermal degradation of crude

• No any reason

• Less pressure gives valuable products

What are the tests for gasoline?

• flash point test
• pH level test
• Common tests for gasoline include octane rating, vapor pressure, density, and contaminant analysis.
• viscosity test

Relation between reid vapour pressure and true vapour pressure

• Reid vapor pressure is always lower than true vapor pressure.
• True vapor pressure is influenced by atmospheric pressure only.
• Reid vapor pressure and true vapor pressure are identical under all conditions.
• Reid vapor pressure is typically higher than true vapor pressure due to additional factors like temperature and dissolved gases.

Antioxidants or inhibitors used in gasoline such as

• Carboxylic acids
• Esters
• Alkanes
• Phenols and amines

Formula to find out smoke point as

• Smoke point = 0.48P + 0.32N + 0.20A

• Smoke point = 0.48P + 0.32A + 0.20N

• Smoke point = 0.48A + 0.32N + 0.20P

• Smoke point = 0.48N + 0.32P + 0.20A

Diesel fuel classified by on the basis of

• Boiling point and molecular weight
• Flash point and sulfur content
• Octane number and viscosity
• Speed, load and time

The ASTM distillation method is used to:

• Evaluate the viscosity of lubricants.
• Determine the boiling range of petroleum products.
• Analyze the chemical composition of gases.
• Measure the density of liquids.

The crude distillation curve is primarily used to

• measure the viscosity of crude oil
• determine the density of crude oil
• Estimate the yield of different fractions in crude oil.

• assess the color of crude oil

The octane rating of gasoline is an indicator of its

• fuel efficiency
• chemical composition
• knock resistance
• color of the gasoline