For pasteurisation of milk by Flash method, at which temperature is milk
heated?

1 Answer

Answer :

100°C

Related questions

Description : Pasteurisation is the process in which milk is heated to – (1) 60°C for 10 minutes (2) 63° C for 20 minutes (3) 63°C for 30 minutes (4) 72°C for 10 minutes

Last Answer : (3) 63°C for 30 minutes Explanation: Pasteurization for pasteurisation) is a process of heating a food, which is usually a liquid, to a specific temperature for a predefined length of time ... (assuming the pasteurized product is stored as indicated and is consumed before its expiration date).

Description : Pasteurisation is the process in which milk is heated to (1) 60°C for 10 minutes (2) 63° C for 20 minutes (3) 63°C for 30 minutes (4) 72°C for 10 minutes

Last Answer : 63°C for 30 minutes

Description : Pasteurisation of milk means (A) Removal of fatty and albuminous substance from it (B) Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics (C) Inhibiting the growth of micro-organisms without killing them (D) None of these

Last Answer : (B) Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics

Description : The heat treatment applied to milk before distribution to stabilize and to remove disease causing bacteria is called as – (1) Pasteurisation (2) Fermentation (3) Coagulation (4) Homogenisation

Last Answer : (1) Pasteurisation Explanation: Pasteurisation is a process of heating milk for 30 minutes at 62° C and cooling rapidly to kill harmful bacteria.

Description : Pick out the wrong statement. (A) Pasteurisation of milk involves moderate heating followed by cooling (B) Bakeries and breweries make use of yeasts (C) Enzyme is a complex nitrogenous compound (D) Oils and fats are alkaloids

Last Answer : (D) Oils and fats are alkaloids

Description : The heat treatment applied to milk before distribution to stabilize and to remove disease causing bacteria is called as : (1) Pasteurisation (2) Fermentation (3) Coagulation (4) Homogenisation

Last Answer : Pasteurisation

Description : Pasteurisation of milk means– (1) heating of milk to above 72°C (2) heating of milk to above 62°C (3) cooling of milk to about 62°C (4) cooling of milk to about 10°C

Last Answer : heating of milk to above 62°C

Description : _________ is pressurised heating for a short time. a) pasteurisation b)drying c)vacuum packing d)canning

Last Answer : a) pasteurisation

Description : What do you mean by “Tyndallisation” and “Pasteurisation”. State the methods of pasteurisation.

Last Answer : Tyndallisation : This is a fractional sterilization method. This method is used for sterilization of medicaments unstable at 1150C but able to withstand low temperature heating. This method consist of ... High Temperature Short Time (HTST) Vat pasteurization Ultra High Temperature(UHT)

Description : Pick out the correct statement. (A) Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the number of theoretical stages required for the separation of ... Flash distillation is suitable for separating components which have very close boiling temperature

Last Answer : (A) Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the number of theoretical stages required for the separation of non￾ideal binary system by distillation

Description : Temperature and duration in Flash method of Pasteurization is A 62.9℃, 30 min B 71.6℃, 30 min C 71.6℃, 15 seconds D 62.9℃, 15 seconds

Last Answer : C 71.6℃, 15 seconds

Description : Do you throw away the skin that sometimes forms on the surface of milk while it s being heated stir it back into the milk?

Last Answer : It is up to you. Some people actually scoop up the skin and either dispose of it, or even eat it (it is still milk, after all). If stirred back in, it may make the rest of the milk rather lumpy.

Description : Pasteurization is a process in which milk is Heated at

Last Answer : 630C for 30 min

Description : To achieve continuous pasteurization in milk, the milk needs to be heated to 161ºF for ____ seconds. a. 15 c. 10 b. 20 d. 5

Last Answer : a. 15

Description : What is the coldest temperature that humans could live in, and still have our homes heated with current technology?

Last Answer : I don't think the heating would be too much of a challenge, down to some incredibly cold temperatures. I think the support systems would start to fail first, the transportation networks, the utilities, ... With some adaptions we could go lower, but things start to get brittle in that kind of cold.

Description : As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),((b),"Visconsity decrease",T_(2)),((c),"

Last Answer : As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),(( ... T_(3) lt T_(4) lt T_(1) lt T_(2)`

Description : As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),((b),"Visconsity decrease",T_(2)),((c),"

Last Answer : As Rhombic sulphur is heated in a test tube : `{:(,"Process","Temperature"),((a),"Viscosity increases",T_(1)),(( ... T_(3) lt T_(4) lt T_(1) lt T_(2)`

Description : The resistance of a silver wire at `0^(@)C " is " 1.25 Omega`. Upto what temperature it must be heated so that its resistance is doubled ? The tempera

Last Answer : The resistance of a silver wire at `0^(@)C " is " 1.25 Omega`. Upto what temperature ... temperature be same for all silver conductors of all shapes ?

Description : Two cubic meters of a gas at 30 degrees Kelvin are heated at a constant pressure until the volume doubles. What is the final temperature of the gas?

Last Answer : 60

Description : What is the perfect condition for dehumidification of air? A. air is heated above its dew point temperature B. air is cooled up to its dew point temperature C. air is heated below its dew point temperature D. air is cooled below its dew point temperature

Last Answer : ANSWER : D

Description : A copper plate has a circular hole cut in it. If the plate is heated to a higher temperature, the diameter of the hole (a) Becomes smaller (b) Increases (c) Remains constant (d) Increases but the total area of the plate remains constant

Last Answer : Ans:(b)

Description : Which of the following statements concerning the specific gravity of a battery electrolyte is true? A. The electrolyte becomes less dense when it is cooled. B. The specific gravity reading is lowered ... water is added. D. The temperature does not affect the specific gravity of the electrolyte.

Last Answer : Answer: B

Description : Heavy water is preferred over ordinary water as a coolant, because it. (A) Acts both as an efficient coolant as well as a moderator (B) Can be heated to a higher temperature without pressurizing (C) Is less prone to radiation damage (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : Acid proof stoneware (A) Has very low strength (B) Cannot be heated (C) Is broken by small temperature changes (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its ... (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature

Last Answer : (C) Cold working of a metal decreases its fatigue strength

Description : The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C. (A) 25 (B) > 25 (C) < 25 (D) - 25

Last Answer : (B) > 25

Description : A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case, (A) The cooling rate will be the same for the two spheres and hence the ... equal amount of radiation from the surrounding in the beginning (D) Both (B) & (C)

Last Answer : (D) Both (B) & (C)

Description : In case of __________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface. (A) Nucleate (B) Local (C) Pool (D) Saturated

Last Answer : (B) Local

Description : LMTD for counter-flow and parallel flow heat exchanger will be the same, when the (A) Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid) (B) Outlet temperature of ... temperature of hot fluid is less than the outlet temperature of the cold fluid (D) None of these

Last Answer : (A) Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid)

Description : Pick out the wrong statement. (A) In process heat exchangers, saturated steam is preferred over the superheated steam (B) The maximum is the emissive power of a surface at a temperature T1 ... under natural convection conditions, the velocity profile in air, normal to the plate, exhibits a maximum

Last Answer : (B) The maximum is the emissive power of a surface at a temperature T1 occurs at a wavelength of λ1 . If the surface temperature is halved, the maximum in the emissive power would occur at a wavelength of 0.5 λ1

Description : In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining ... than 45°C (B) More than 45°C (C) Equal to 45°C (D) Initially decreases and remains constant thereafter

Last Answer : (B) More than 45°C

Description : Gypsum is heated at........temperature to form plaster of paris.(a) 110degree Celsius (b) 120degree Celsius (c) 100degree Celsius (d) 101degree Celsius

Last Answer : (c) 100degree Celsius

Description : At what temperature is gypsum heated to form Plaster of Paris?a) 90°C b) 100°C c) 110°C d) 120°C

Last Answer : b) 100°C

Description : Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis. (A) 500 (B) 750 (C) 950 (D) 1100

Last Answer : (B) 750

Description : Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximateanalysis. (A) 550 (B) 750 (C) 950 (D) 1150

Last Answer : (C) 950

Description : A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the  ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2  MN/mm2 , the ... N/mm2 (B) 100 N/mm2 (C) 120 N/mm2 (D) 150 N/mm2 Answer: Option 

Last Answer : (C) 120 N/mm

Description : Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C. (A) 80-120 (B) 200-300 (C) 600-800 (D) 1000-1100

Last Answer : (D) 1000-1100

Description : The thermal radiation emitted by a blackbody heated to a given temperature.  a. Gamma Radiation  b. Black Body Radiation  c. Electromagnetic Radiation  d. Alpha Radiation

Last Answer : Black Body Radiation

Description : A gas having a volume of100 ft³ at 27ºC is expanded to 120 ft³by heated at constant pressure to what temperature has it been heated to have this new volume?  a. 87°C  b. 85°C  c. 76°C  d. 97°C t2= T2–T1

Last Answer : 87°C

Description : Water (specific heat cv= 4.2 kJ/ kg ∙ K ) is being heated by a 1500 W h eater. What is the rate of change in temperature of 1kg of the water?  A. 0.043 K/s  B. 0.179 K/s  C. 0.357 K/s  D. 1.50 K/s Formula: Q = mcv ( T)

Last Answer : 0.179 K/s

Description : Identical objects of four different materials are heated to the same high temperature. Which of the following would least likely burn your hand if touched?  a. aluminium  b. brass  c. glass  d. concrete

Last Answer : glass

Description : A perfect gas at 27°C is heated at constant pressure till its volume is double. The final temperature is  (a) 54°C  (b) 327°C  (c) 108°C  (d) 654°C  (e) 600°C

Last Answer : Answer : b

Description : On which of the following variables heat convected depends ? (a) Power density (b) Temperature difference between heated surface and coolant (c) Thermal resistivity, density, specific heat (d) Gravitational constant (e) All ofthe above

Last Answer : (e) All ofthe above

Description : If a ferromagnetic material is heated upto Curie temperature, it becomes (a) Permanent magnet (b) Anti-ferromagnetic material (c) Diamagnetic material (d) Paramagnetic material 

Last Answer : Paramagnetic material

Description : Which temperature for a lubricating oil will be lowest ? (A) Flash point (B) Fire point (C) Pour point (D) Boiling

Last Answer : Ans: C

Description : Refer to the deviation of the operating frequency of a crystal oscillator from its nominal value due to temperature variations. A. Drift B. Flash over C. Frequency deviation D. Deviation ratio

Last Answer : A. Drift

Description : Viscosity index of a lubricating oil (A) Is the measure of its flash point (B) Is the measure of variation of viscosity with temperature (C) Should be low (D) None of these

Last Answer : (B) Is the measure of variation of viscosity with temperature

Description : In case of liquid petrofuels, momentary combustion is observed at its (A) Flash point (B) Preheating temperature corresponding to viscosity of 25 centistokes (C) Flame temperature (D) Fire point

Last Answer : (A) Flash point