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GATE 2018 : Life Sciences [Section U / Food Technology] (with Final Answer Keys)

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GATE 2018 Food Technology ( XL-U) Q. 1 Q. 10 carry one mark each & Q.11 - Q.20 carry two marks each. Q.1 Which of the following is an oil soluble pigment present in fruits and vegetables? (A) Flavonoids Q.2 Q.3 Q.4 (B) Carotenoids (C) Anthocyanins (D) Tannins Which of the following represent the group of saturated fatty acids? (A) Lauric, Myristic, Arachidic (B) Palmitic, Linoleic, Linolenic (C) Capric, Stearic & Oleic (D) Behenic, Caprylic, Arachidonic The anti-nutritional factor present in fava bean is (A) Gossypol (B) Curcine (C) Vicine (D) Cyanogen Which of the following is a Gram positive bacteria? (A) Listeria monocytogenes (B) Proteus vulgaris (C) Salmonella typhi (D) Shigella dysenteriae Q.5 Irradiation carried out to reduce viable non-spore forming pathogenic bacteria using a dose between 3 to 10 kGy is Q.6 (A) Radurization (B) Thermoradiation (C) Radappertization (D) Radicidation Identify the correct statement related to the viscosity of Newtonian fluids from the following. (A) It is not influenced by temperature (B) It increases with shearing rate (C) It decreases with shearing rate (D) It is not influenced by shearing rate XL-U 1/4 GATE 2018 Food Technology ( XL-U) Q.7 Adult male Wistar rats were fed with a protein based diet. Total 150 g of protein was ingested per animal. If the average weight increased from 110 g to 350 g after the end of experiment, the Protein efficiency ratio of the given protein would be _______. (up to two decimal points). Q.8 The initial moisture content of a food on wet basis is 50.76%. Its moisture content (%) on dry basis is _______.(up to two decimal points) Q.9 The oxygen transmission rate through a 2.54 x 10-3 cm thick low density polyethylene film with air on one side and inert gas on the other side is 3.5 x 10-6 mL cm-2 s-1. Oxygen partial pressure difference across the film is 0.21 atm. The permeability coefficient of the film to oxygen is _______ x 10-11 mL (STP) cm cm-2 s-1 (cm Hg)-1. Q.10 Ambient air at 30 C dry bulb temperature and 80% relative humidity was heated to a dry bulb temperature of 80 C in a heat exchanger by indirect heating. The amount of moisture gain (g kg-1 dry air) during the process would be _______. Q. 11 Q. 20 carry two marks each. Q.11 Match the commodity in Group I with the bioactive constituent in Group II Group I P. Ginger Q. Green tea R. Spinach S. Turmeric Group II 1. Lutein 2. Gingerol 3. Curcumin 4. Epigallocatechin gallate (A) P-1, Q-2, R-3, S-4 (B) P-2, Q-4, R-1, S-3 (C) P-4, Q-1, R-3, S-2 (D) P-2, Q-3, R-1, S-4 Q.12 Match the process operation in Group I with the separated constituent in Group II Group I P. Extraction Q. Degumming R. Neutralization S. Bleaching (A) P-3, Q-2, R-4, S-1 (C) P-4, Q-1, R-2, S-3 XL-U Group II 1. Phospholipids 2. Free fatty acids 3. Pigments 4. Crude oil (B) P-4, Q-3, R-1, S-2 (D) P-4, Q-1, R-3, S-2 2/4 GATE 2018 Food Technology ( XL-U) Q.13 Match the spoilage symptom in Group I with the causative microorganism in Group II Group I P. Green rot of eggs Q. Putrid swell in canned fish R. Red bread S. Yellow discoloration of meat (A) P-4, Q-3, R-2, S-1 (C) P-3, Q-4, R-2, S-1 Group II 1. Micrococcus spp. 2. Serretia marcescens 3. Pseudomonas fluorescens 4. Clostridium sporogens (B) P-2, Q-1, R-4, S-3 (D) P-1, Q-4, R-3, S-2 Q.14 Match the fermented product in Group I with the base material in Group II Group I P. Sake Q. Chhurpi R. Natto S. Sauerkraut Group II 1. Milk 2. Cabbage 3. Rice 4. Soybean (A) P-3, Q-1, R-4, S-2 (C) P-4, Q-1, R-3, S-2 (B) P-1, Q-3, R-4, S-2 (D) P-2, Q-4, R-1, S-3 Q.15 Match the operation in Group I with the process in Group II Group I P. Cleaning Q. Grading R. Size reduction S. Filtration (A) P-1, Q-3, R-4, S-2 (C) P-2, Q-4, R-1, S-3 Group II 1. Quality separation 2. Clarification 3. Screening 4. Comminution (B) P-4, Q-1, R-3, S-2 (D) P-3, Q-1, R-4, S-2 Q.16 Out of 7 principles of HACCP system, 4 are listed below. Arrange these principles in the order in which they are applied. (P) Conduct a hazard analysis (Q) Establish monitoring process (R) Establish critical limit (S) Establish record keeping and documentation process (A) P, R, Q, S XL-U (B) Q, R, P, S (C) P, Q, R, S (D) R, S, P, Q 3/4 GATE 2018 Food Technology ( XL-U) Q.17 Identify an example of a classical diffusional mass transfer process without involving heat, among the following. (A) Drying of food grains (B) Carbonation of beverages (C) Distillation of alcohol (D) Concentration of fruit juice Q.18 For an enzyme catalyzed reaction S P , the kinetic parameters are: [S] = 40 M, V0 = 9.6 M s-1 and Vmax = 12.0 M s-1. The Km of the enzyme in M will be _______.(up to one decimal points) Q.19 A microbial sample taken at 10 AM contained 1x105 CFU/mL. The count reached to 1x1010 CFU/mL at 8 PM of the same day. The growth rate (h-1) of the microorganism would be _______.(up to two decimal points) Q.20 The rate of heat transfer per unit area from a metal plate is 1000 W m-2. The surface temperature of the plate is 120 C and ambient temperature is 20 C. The convective heat transfer coefficient (W m-2 C-1) using the Newton s law of cooling will be _______. END OF THE QUESTION PAPER XL-U 4/4 Q.No. Type Section Key/Range Marks 1 MCQ GA A 1 2 MCQ GA C 1 3 MCQ GA B 1 4 MCQ GA B 1 5 MCQ GA B 1 6 MCQ GA A 2 7 MCQ GA D 2 8 MCQ GA D 2 9 MCQ GA B 2 10 MCQ GA C 2 1 MCQ XL P A 1 2 MCQ XL P D 1 3 MCQ XL P D 1 4 NAT XL P 11 to 11 1 5 NAT XL P 4 to 4 1 6 MCQ XL P D 2 7 MCQ XL P D 2 8 MCQ XL P A 2 9 MCQ XL P D 2 10 MCQ XL P A 2 11 MCQ XL P C 2 12 MCQ XL P B 2 13 NAT XL P 1.39 to 1.43 2 Q.No. Type Section Key/Range Marks 14 NAT XL P 7.39 to 7.54 2 15 NAT XL P 13.40 to 13.36 2 1 MCQ XL Q B 1 2 MCQ XL Q A 1 3 MCQ XL Q C 1 4 MCQ XL Q C 1 5 MCQ XL Q D 1 6 MCQ XL Q C 1 7 MCQ XL Q D 1 8 MCQ XL Q B 1 9 NAT XL Q 12 to 12 1 10 NAT XL Q 50 to 50 1 11 MCQ XL Q A 2 12 MCQ XL Q A 2 13 MCQ XL Q D 2 14 MCQ XL Q B 2 15 MCQ XL Q B 2 16 NAT XL Q 512 to 512 2 17 NAT XL Q 20 to 20 2 18 NAT XL Q 0.8 to 0.8 2 19 NAT XL Q 77 to 77 2 20 NAT XL Q 8862 to 8862 2 1 MCQ XL R A 1 Q.No. Type Section Key/Range Marks 2 MCQ XL R B 1 3 MCQ XL R C 1 4 MCQ XL R D 1 5 MCQ XL R B 1 6 MCQ XL R C 1 7 MCQ XL R A 1 8 MCQ XL R A 1 9 MCQ XL R B 1 10 NAT XL R 28.00 to 31.00 1 11 MCQ XL R D 2 12 MCQ XL R D 2 13 MCQ XL R C 2 14 MCQ XL R B 2 15 MCQ XL R C 2 16 MCQ XL R D 2 17 MCQ XL R A 2 18 MCQ XL R B 2 19 NAT XL R 20.25 to 20.25 2 20 NAT XL R 11.00 to 12.00 2 1 MCQ XL S B 1 2 MCQ XL S A 1 3 MCQ XL S A 1 4 MCQ XL S D 1 Q.No. Type Section Key/Range Marks 5 MCQ XL S D 1 6 MCQ XL S C 1 7 MCQ XL S D 1 8 MCQ XL S B 1 9 MCQ XL S A 1 10 NAT XL S 1.38 to1.42 1 11 MCQ XL S C 2 12 MCQ XL S C 2 13 MCQ XL S A 2 14 MCQ XL S D 2 15 MCQ XL S B 2 16 MCQ XL S A 2 17 NAT XL S 2.60 to 2.80 2 18 NAT XL S 0.5 to 0.5 2 19 NAT XL S 45.50 to 46.50 2 20 NAT XL S 30.5 to 31.5 2 1 MCQ XL T C 1 2 MCQ XL T B 1 3 MCQ XL T A 1 4 MCQ XL T D 1 5 MCQ XL T C 1 6 MCQ XL T D 1 7 MCQ XL T B 1 Q.No. Type Section Key/Range Marks 8 MCQ XL T A 1 9 MCQ XL T A 1 10 MCQ XL T C 1 11 MCQ XL T B 2 12 MCQ XL T D 2 13 MCQ XL T C 2 14 MCQ XL T C 2 15 MCQ XL T B 2 16 MCQ XL T D 2 17 MCQ XL T C 2 18 MCQ XL T A 2 19 NAT XL T 5270 to 5310 2 20 NAT XL T 0.056 to 0.062 2 1 MCQ XL U B 1 2 MCQ XL U A 1 3 MCQ XL U C 1 4 MCQ XL U A 1 5 MCQ XL U D 1 6 MCQ XL U D 1 7 NAT XL U 1.55 to 1.65 1 8 NAT XL U 103.0 to 103.2 1 9 NAT XL U 54 to 56 1 10 NAT XL U 0 to 0 1 Q.No. Type Section Key/Range Marks 11 MCQ XL U B 2 12 MCQ XL U C 2 13 MCQ XL U C 2 14 MCQ XL U A 2 15 MCQ XL U D 2 16 MCQ XL U A 2 17 MCQ XL U B 2 18 NAT XL U 9.8 to 10.2 2 19 NAT XL U 1.1 to 1.8 2 20 NAT XL U 10 to 10 2

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