Question: Pick out the wrong statement?
- 1. Atoms with same number of nucleons but different number of protons are called isobars
- 2. Atoms with same number of protons but different number of nucleons are called isoters
- 3. Out of α, β, and γ-rays, the one having maximum penetration power are γ-rays
- 4. The product formed by emission of α-particle has mass number less by 4 units than the parent nuclide
Question: Pick out the wrong statement?
- 1. α-particle emission from a radioactive element makes it electrically negative
- 2. β-particle emission from a radioactive element makes it electrically positive
- 3. A radioactive element having a half life period of 20 years will completely disintegrated in 40 years
- 4. The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration
Question: Operating condition in the electrical dehydrators for crude oil is about____________________?
- 1. 6.5 kgf/Cm2 & 95°C
- 2. 1 atm. & 110 °C
- 3. 20 kgf/cm2 & 110°C
- 4. 50 atm. and 150°C
Question: Which of the following has the highest gum forming tendency in gosoline ?
- 1. Paraffins
- 2. Diolefins
- 3. Aromatics
- 4. Naphthenes
Question: Aniline point of the diesel is a measure of its ______________ content?
- 1. Aromatic
- 2. Paraffin
- 3. Olefin
- 4. Naphthene
Question: Which is the most undesirable component in kerosene ?
- 1. Aromatics
- 2. i-paraffins
- 3. n-paraffins
- 4. Naphthenes
Question: 95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ °C?
Question: Natural gasoline is produced___________________?
- 1. From oil wells
- 2. In oil refineries
- 3. By natural gas stripping
- 4. None of these
Question: _____________ determination is not a very significant and important test for gasoline?
- 1. Gum & sulphur content
- 2. Viscosity
- 3. Octane number
- 4. Reid vapor pressure
Question: Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ?
- 1. Paraffins
- 2. Naphthenes
- 3. Aromatics
- 4. Iso-paraffins
