Oils and Fats Technology MCQs 50 Score: 0 Attempted: 0/50 Subscribe 1. : The main constituent of fats and oils is: (A) Sterols (B) Triglycerides (C) Phospholipids (D) Waxes Show All Answers 2. : The process of converting liquid oils into semi-solid fats is called: (A) Refining (B) Hydrogenation (C) Fractionation (D) Bleaching 3. : Which catalyst is commonly used in the hydrogenation of oils? (A) Iron (B) Nickel (C) Copper (D) Zinc 4. : The iodine value of an oil indicates its: (A) Free fatty acid content (B) Degree of unsaturation (C) Peroxide content (D) Melting point 5. : Rancidity in oils is mainly caused by: (A) Freezing (B) Oxidation (C) Dehydration (D) Emulsification 6. : Which of the following is a saturated fatty acid? (A) Oleic acid (B) Stearic acid (C) Linoleic acid (D) Linolenic acid 7. : The process of separating solid and liquid fractions of oil is known as: (A) Deodorization (B) Fractionation (C) Degumming (D) Winterization 8. : The smoke point of oil is the temperature at which: (A) It starts to boil (B) Smoke appears (C) It solidifies (D) It becomes cloudy 9. : Which method is used for the extraction of oil from seeds? (A) Centrifugation (B) Expeller pressing (C) Filtration (D) Pasteurization 10. : The refining process removes: (A) Fatty acids (B) Impurities and gums (C) Water (D) Color only 11. : The rancid flavor in oils is mainly due to: (A) Formation of peroxides (B) Loss of pigments (C) Loss of water (D) Polymerization 12. : Which test measures the oxidation stability of oil? (A) Iodine test (B) Rancimat test (C) Kjeldahl test (D) Saponification test 13. : The acid value of oil indicates: (A) Degree of oxidation (B) Free fatty acid content (C) Total fat content (D) Melting range 14. : Which oil is most resistant to oxidation? (A) Linseed oil (B) Coconut oil (C) Soybean oil (D) Sunflower oil 15. : Lecithin is obtained as a by-product during: (A) Degumming of oils (B) Deodorization (C) Hydrogenation (D) Fractionation 16. : Which gas is responsible for oxidative rancidity? (A) Nitrogen (B) Oxygen (C) Carbon dioxide (D) Hydrogen 17. : The saponification value is a measure of: (A) Molecular weight of fatty acids (B) Free fatty acid content (C) Peroxide formation (D) Unsaturation 18. : The bleaching process removes: (A) Pigments and coloring matter (B) Free fatty acids (C) Moisture (D) Sugars 19. : Which of the following is a polyunsaturated fatty acid? (A) Stearic acid (B) Oleic acid (C) Linoleic acid (D) Palmitic acid 20. : Which enzyme causes hydrolytic rancidity in oils? (A) Lipase (B) Amylase (C) Protease (D) Oxidase 21. : The process of deodorization is carried out by: (A) Steam distillation (B) Solvent extraction (C) Filtration (D) Crystallization 22. : Which of the following oils is high in omega-3 fatty acids? (A) Mustard oil (B) Flaxseed oil (C) Palm oil (D) Groundnut oil 23. : The refractive index of an oil increases with: (A) Decrease in temperature (B) Increase in unsaturation (C) Increase in saturation (D) Crystallization 24. : Which oil is commonly used for margarine manufacture? (A) Coconut oil (B) Palm oil (C) Sesame oil (D) Groundnut oil 25. : Peroxide value is used to measure: (A) Freshness of oil (B) Degree of oxidation (C) Acidity (D) Melting point 26. : Antioxidants are added to oils to: (A) Increase rancidity (B) Prevent oxidation (C) Change color (D) Improve solubility 27. : Tocopherols in oils act as: (A) Coloring agents (B) Antioxidants (C) Emulsifiers (D) Preservatives 28. : Which of the following is a natural antioxidant? (A) BHA (B) BHT (C) Vitamin E (D) Propyl gallate 29. : Which oil has the highest smoke point? (A) Olive oil (B) Peanut oil (C) Coconut oil (D) Butter 30. : The main function of fats in bakery products is to: (A) Provide flavor and texture (B) Increase sweetness (C) Improve color only (D) Reduce water activity 31. : The term “cold pressing” refers to: (A) Extraction without heating (B) Extraction at high temperature (C) Refining process (D) Fractionation 32. : The color of crude palm oil is due to: (A) Carotenoids (B) Chlorophyll (C) Xanthophyll (D) Anthocyanin 33. : Which method is used for detection of adulteration in oils? (A) Halphen test (B) Benedict’s test (C) Iodine test (D) Fehling’s test 34. : The melting point of fats increases with: (A) Unsaturation (B) Chain length (C) Presence of double bonds (D) Oxidation 35. : The term “winterization” refers to: (A) Removal of high-melting triglycerides (B) Cooling and crystallization (C) Removing odor (D) Refining 36. : Which type of rancidity occurs due to moisture and enzymes? (A) Oxidative rancidity (B) Hydrolytic rancidity (C) Thermal rancidity (D) Spontaneous rancidity 37. : The shelf life of oils can be improved by: (A) Adding antioxidants (B) Increasing exposure to air (C) Heating frequently (D) Using iron containers 38. : Unsaturated fatty acids contain: (A) No double bonds (B) One or more double bonds (C) Only single bonds (D) Triple bonds 39. : The smoke point of an oil decreases due to: (A) Oxidation and impurities (B) Refining (C) Fractionation (D) Filtration 40. : Hydrogenation of oils produces: (A) Trans fats (B) Polyunsaturated fats (C) Short-chain fatty acids (D) Emulsified fats 41. : Which of the following is a monounsaturated fatty acid? (A) Palmitic acid (B) Oleic acid (C) Linoleic acid (D) Stearic acid 42. : The presence of foam during frying indicates: (A) Oxidation (B) Polymerization (C) Rancidity (D) Contamination 43. : Which oil is rich in lauric acid? (A) Palm oil (B) Coconut oil (C) Mustard oil (D) Soybean oil 44. : The first step in refining crude oil is: (A) Degumming (B) Bleaching (C) Deodorization (D) Neutralization 45. : The trans-fat formation increases with: (A) Hydrogenation (B) Refining (C) Blanching (D) Fractionation 46. : The Gardner color scale is used for: (A) Measuring color of oils (B) Determining viscosity (C) Testing rancidity (D) Checking moisture 47. : Which compound gives a soapy taste to oil? (A) Free fatty acids (B) Aldehydes (C) Ketones (D) Esters 48. : The oxidative stability of oil can be increased by: (A) Removing metal ions (B) Heating frequently (C) Exposing to light (D) Increasing unsaturation 49. : Which of the following is a drying oil? (A) Linseed oil (B) Coconut oil (C) Mustard oil (D) Olive oil 50. : The process of removing waxes from oil is called: (A) Dewaxing (B) Bleaching (C) Winterization (D) Neutralization