Technical MCQs

1. In case of fatty oil, Rancidity can be reduced by its: (A) Purification (B) Oxidation (C) Hydrogenation (D) Decoloration  2. For extraction of oil, which solvent is used? (A) Furfurol (B) Hexane (C) Methyl ethyl ketone (D) None of the above 3. Generally hydrogenation of oil does not: (A) Raise its melting point (B) Improve its resistance to oxidation (C) Remove double bonds (D) None of the above 4. In the hydrogenation of oil, the catalyst used is: (A) Platinum (B) Iron (C) Alumina (D) Nickel 5. Soaps basically remove dirt by: (A) Supplying hydrophilic group (B) Increasing the surface tension (C) Decreasing wettability (D)  None of the above 6. Metallic salt is basically which salt of fatty acids: (A) Potassium (B) Aluminum or calcium (C) Sodium (D) Both sodium and potassium 7. Which is the fat-splitting catalyst? (A) Fe (B) Al 2 O 3 (C) CaCO 3 (D) ZnO 8. We cannot use soap with hard water, because: (A) They attract back the removed dirt (B) Hard water contains sulphate (C) They for

1. Generally turbine flow occurs for cases involving: (A) Very slow motion (B) Highly viscous fluid (C) Very narrow passage (D) None of the above 2. Basically an ideal fluid is: (A) Highly viscous (B) Frictionless and incompressible (C) Both A and B (D) None of the above 3. Steady flow basically occurs, when: (A) Rate of velocity change is constant (B) Conditions do not change with time at any point  (C) Conditions are the same at the adjacent (D) Conditions changes steadily with time 4. From the given, which must be followed by the flow of a fluid? (A) Newton’s second law of motion (B) The continuity equation (C) Fluid cannot penetrate a boundary (D) All of the above 5. Which is the unit of velocity head? (A) m-Kgs/Kg (B) m-Kg/m 3 (C) m-Kg/sec (D) m-Kg/m 6. Bernoulli’s equation generally describes the: (A) Mechanical energy balance in turbulent flow (B) Mechanical energy balance in boundary (C) Mechanical energy balance in potential flow (D) Kinetic energy balance in laminar flow 7. F

1. The emissivity of the black body is: (A) 0.5 (B) 0.6 (C) 0 (D) 0.78 2. The absorptivity of a black body is: (A) 0 (B) 1 (C) 0.5 (D) 0.9 3. In heat transfer by radiation the range of the electromagnetic spectrum is……….microns: (A) 5-50 (B) 0.5-50 (C) 100-1000 (D) 10-20 4. The ratio of total radiating power to the absorptivity of a body as per Kirchhoff’s law depends on the: (A) Nature of the material of the body (B) Temperature of the body only (C) Wavelength of monochromatic radiation (D) None of the above 5. Kirchhoff’s law is basically applicable to: (A) Only volume and not to surfaces (B) Monochromatic radiation only (C) Total radiation only (D) Both B and C 6. “Maximum wavelength of radiation is inversely proportional to the temperature” is the statement of which of the following law: (A) Planck’s (B) Wien’s displacement (C) Stefan-Boltzmann’s (D) None of the above 7. Solid angle which is subtended by the finite surface at the radiating element is: (A) Called the angle of vision

1. The basic and main aim of cracking is to produce: (A) Petroleum (B) Coke (C) Lube oil (D) Gasoline 2. Clay treatment is always used to remove: (A) Wax from lube oil (B) Salt from the crude oil (C) Color and dissolved gases from cracked gasoline (D) None of the above 3. In the case of alpha-methyl naphthalene, Cetane number is generally assumed to be: (A) 50 (B) Infinity (C) 100 (D) 0 4. Solutizer agent used with caustic alkali in sweetening process is: (A) Phenol (B) Methanol (C) Potassium isobutyrate (D) Sodium plum bite 5. In doctor’s treatment which solution is used for removal of mercaptans? (A) Potassium isobutyrate (B) Cupric chloride (C) Sodium plum bite (D) Sodium hydroxide 6. Which solvent is mostly used for dewaxing? (A) Petroleum ether (B) Sodium plum bite (C) Naphtha (D) Methyl-ethyl-ketone 7. from the following which fraction of petroleum contains maximum Sulphur? (A) Naphtha (B) Diesel (C) Atmospheric residue (D) Gasoline 8. In the deasphalting process which solvent is

1. Which equation relates latent heat and boiling point? (A) Trouton’s (B) Kopp’s (C) Rotational (D) Antoine 2. for gases, volume percent is equal to the: (A) Mole percent   (B) Weight percent only for ideal gases (C) Mole percent only for ideal gases (D) Weight percent 3. For an ideal gas, Cp-Cv is equal to: (A) 3R (B) 2R (C) R (D) R/2 4. For an ideal gas the internal energy is independent of the: (A) Volume (B) Pressure (C) Both A and B (D) None of the above 5. For fuel the heat of------is called its calorific value? (A) Combustion (B) Formation (C) Vaporization (D) Reactions 6. 1 Kg/m 2 is equal to how many mm water columns? (A) 1000 (B) 100 (C) 10 (D) 1 7. 1 Kg/cm 2 is basically equal to: (A) 1 meter of the water column (B) 10 meters of the water column (C) 1 KPa (D) 760 torr 8. Which chart is a graph related to Antoine's equation? (A) Cox (B) Mollier’s (C) Enthalpy-concentration (D) Ostwald 9. from the following which is followed by an ideal solution? (A) Trouton’s rule (B) Ra