What name is given to a material that doesn and rsquot allow heat to transfer through it easily?

What name is given to a material that doesn and rsquot allow heat to transfer through it easily?
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In heating frozen foods in sealed pouches in microwaves, why do you first poke holes in the pouch? (1) To prevent the steam pres-sure from bursting open the pouch (2) To allow the heat to get into the food through the hole (3) To allow the microwaves to get into the food through the holes (4) To allow the aroma of the food to come out through the holes

Description : In heating frozen foods in sealed pouches in microwaves, why do you first poke holes in the pouch? (1) To prevent the steam pres-sure from bursting open the pouch (2) To allow the heat to get into ... into the food through the holes (4) To allow the aroma of the food to come out through the holes

Last Answer : (1) To prevent the steam pres-sure from bursting open the pouch Explanation: Anything in a tight skin or shell can explode in a microwave because the water inside can expand and burst through. It ... of shells and holes should be poked in the plastic wrap or sealed pouches of frozen packaged foods.

In heating frozen foods in sealed pouches in a microwaves, why do you first poke holes in the pouch? (1) To prevent the steam pressure from bursting open the pouch (2) To allow the heat to get into the food through the hole (3) To allow the microwaves to get into the food through the holes (4) To allow the aroma of the food to come out through the holes

Description : In heating frozen foods in sealed pouches in a microwaves, why do you first poke holes in the pouch? (1) To prevent the steam pressure from bursting open the pouch (2) To allow the heat to get into ... into the food through the holes (4) To allow the aroma of the food to come out through the holes

Last Answer : To prevent the steam pressure from bursting open the pouch

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Last Answer : (C) Most concentrated liquid is at highest temperature

The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) (A) K/h0 (B) 2K/h0 (C) h0 /K (D) h0 /2K

Description : The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h0 = heat transfer coefficient at the outer surface) (A) K/h0 (B) 2K/h0 (C) h0 /K (D) h0 /2K

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Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is ‘3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade?(A) 35.5 (B) 43.75 (C) 81.25 (D) 48.25

Description : Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l'. If the wall temperature ... wall temperature in degree centigrade? (A) 35.5 (B) 43.75 (C) 81.25 (D) 48.25

Last Answer : (C) 81.25

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A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place (A) The better insulation material should be put just next to pipe (i.e., inside) (B) The better insulating material should be put outside (C) Either of the insulating material could be put on either side (D) Steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe)

Description : A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place (A) The better insulation material should be put just ... to which insulating material is to be put inside (i.e., just next to the pipe)

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What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively. (A) 2 (B) 8 (C) 10 (D) 40

Description : What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively. (A) 2 (B) 8 (C) 10 (D) 40

Last Answer : (A) 2

reduction in thermal resistance during heat transfer does not occur in the (A) Convection heat transfer by stirring the fluid and cleaning the heating surface (B) Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity (C) Radiation heat transfer by increasing the temperature and reducing the emissivity (D) None of these

Description : reduction in thermal resistance during heat transfer does not occur in the (A) Convection heat transfer by stirring the fluid and cleaning the heating surface (B) Conduction heat transfer by ... Radiation heat transfer by increasing the temperature and reducing the emissivity (D) None of these

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Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ column. (A) Spray (B) Packed (C) Bubble cap plate (D) Wetted wall

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Why does the Earth’s electric field transfer so easily to the body?

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Im looking to start a career as a Radiology technician,Ive been talking to Keiser University, but hte reviews ive read about them are kind of scary,Im looking for a fully accredited school that will allow me to transfer my credits and will work out of st?

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A CPA in public accounting is prohibited from performing which of the following actions? a. Permit the publication of his being the author of a book. b. Be a party to a stratagem which permits a non-CPA to practice accountancy. c. Allow his wife to acquire shares in a corporation's capital stockd. Act as a stock and transfer agent.

Description : A CPA in public accounting is prohibited from performing which of the following actions? a. Permit the publication of his being the author of a book. b. Be a party to a stratagem which permits a non ... his wife to acquire shares in a corporation's capital stock. d. Act as a stock and transfer agent

Last Answer : Be a party to a stratagem which permits a non-CPA to practice accountancy

The technique called Gamete Intra Fallopian Transfer (GIFT) is recommended for those females (a) who cannot produce an ovum (b) who cannot retain the fetus inside uterus (c) whose cervical canal is too narrow to allow passage for the sperms (d) who cannot provide suitable environment for fertilisation.

Description : The technique called Gamete Intra Fallopian Transfer (GIFT) is recommended for those females (a) who cannot produce an ovum (b) who cannot retain the fetus inside uterus (c) whose cervical ... narrow to allow passage for the sperms (d) who cannot provide suitable environment for fertilisation.

Last Answer : (a) who cannot produce an ovum

Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium salts are white in colour and this helps stomach to appear clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available

Description : Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium ... clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available

Last Answer : (1) barium is a good absorber of X-rays and helps stomach to appear clearly

What is back propagation? a) It is another name given to the curvy function in the perceptron b) It is the transmission of error back through the network to adjust the inputs c) It is the transmission of error back through the network to allow weights to be adjusted so that the network can learn d) None of the mentioned

Description : What is back propagation? a) It is another name given to the curvy function in the perceptron b) It is the transmission of error back through the network to adjust the inputs c) It is the ... the network to allow weights to be adjusted so that the network can learn d) None of the mentioned

Last Answer : c) It is the transmission of error back through the network to allow weights to be adjusted so that the network can learn

What is back propagation? a) It is another name given to the curvy function in the perceptron b) It is the transmission of error back through the network to adjust the inputs c) It is the transmission of error back through the network to allow weights to be adjusted so that the network can learn. d) None of the mentioned

Description : What is back propagation? a) It is another name given to the curvy function in the perceptron b) It is the transmission of error back through the network to adjust the inputs c) It is the ... network to allow weights to be adjusted so that the network can learn. d) None of the mentioned

Last Answer : c) It is the transmission of error back through the network to allow weights to be adjusted so that the network can learn.

Water is a better coolant than a gas (like CO2 , He, N2 etc.), because it (A) Is a better neutron moderator as well (B) Require comparatively smaller pumps and heat exchanger for a given heat transfer rate (C) Has a better heat transfer characteristics, and it can be pressurised to attain a high temperature (D) All (A), (B) and (C)

Description : Water is a better coolant than a gas (like CO2 , He, N2 etc.), because it (A) Is a better neutron moderator as well (B) Require comparatively smaller pumps and heat exchanger for a given heat transfer rate ... , and it can be pressurised to attain a high temperature (D) All (A), (B) and (C)

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

The rate of heat transfer from a vertical plate by natural convection depends upon the temperature differences (ΔT) between wall and outside bulk. The proportionality is given as (A) (ΔT) 1/4 (B) (ΔT) 1/2 (C) (ΔT) 5/4 (D) (ΔT) 3/4

Description : The rate of heat transfer from a vertical plate by natural convection depends upon the temperature differences (ΔT) between wall and outside bulk. The proportionality is given as (A) (ΔT) 1/4 (B) (ΔT) 1/2 (C) (ΔT) 5/4 (D) (ΔT) 3/4

Last Answer : (D) (ΔT) 3/4

Heat transfer co-efficient (h) for a fluid flowing inside a clean pipe is given by h = 0.023 (K/D) (DVρ/µ) 0.8 (CP .µ/k) 0.4 . This is valid for the value of NRe equal to (A) < 2100 (B) 2100-4000 (C) > 4000 (D) > 10000

Description : Heat transfer co-efficient (h) for a fluid flowing inside a clean pipe is given by h = 0.023 (K/D) (DVρ/µ) 0.8 (CP .µ/k) 0.4 . This is valid for the value of NRe equal to (A) < 2100 (B) 2100-4000 (C) > 4000 (D) > 10000

Last Answer : (D) > 10000

In counter flow compared to parallel flow, (A) LMTD is greater (B) Less surface area is required for a given heat transfer rate (C) Both (A) and (B) (D) More surface area is required for a given heat transfer rate

Description : In counter flow compared to parallel flow, (A) LMTD is greater (B) Less surface area is required for a given heat transfer rate (C) Both (A) and (B) (D) More surface area is required for a given heat transfer rate

Last Answer : (C) Both (A) and (B)