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A1 A small model water turbine is tested in a flume where Cp is measured to be 0.38. Assuming dynamic similarity exists, calculate the power output of a full-size turbine of diameter 12 m operating in a tidal stream, where the water density is 1030 kg/m³, μ=1.307³ Ns/m² and maximum water velocity of 2.2 m/s. A2 A U-tube manometer containing a light oil (specific gravity 0.7) is used to measure the static pressure of air (density 1.2 kg/m³) in a container. If the gauge pressure is 206 N/m², what is the indicated height of oil? A3 A steel plate 30 mm thick with a thermal conductivity k = 50 W/m K has a heat transfer rate of 125 kW/m². Assuming steady state heat transfer, calculate the temperature difference across the plate. A4 A siphon pipe of diameter 250 mm contracts to a diameter of 100 mm over a vertical distance of 5 m before emptying into a river. If the pipe is full of water flowing at 0.1 m/s at the 250 mm section, what is the absolute pressure at this point, and what is the water velocity just before it vents into the river? You should assume the pipe to be frictionless and take atmospheric pressure to be 100 kPa. AS A 30 mm diameter aluminium pipe is used to carry hot water, the external surface of the pipe is subjected to a convective heat transfer coefficient of h = 8 W/m²K. Find the heat loss per meter length of the pipe when the external surface temperature is 60°C and the surrounding air is a constant 20°C. A6 After sunset, radiant energy can be sensed by a person standing near a brick wall. Such walls frequently have surface temperatures around 44 °C, and typical brick emissivity values are on the order of 0.92. What would be the radiant thermal flux

A1 A small model water turbine is tested in a flume where Cp is measured to be 0.38. Assuming dynamic similarity exists, calculate the power output of a full-size turbine of diameter 12 m operating in a tidal stream, where the water density is 1030 kg/m³, μ=1.307³ Ns/m² and maximum water velocity of 2.2 m/s. A2 A U-tube manometer containing a light oil (specific gravity 0.7) is used to measure the static pressure of air (density 1.2 kg/m³) in a container. If the gauge pressure is 206 N/m², what is the indicated height of oil? A3 A steel plate 30 mm thick with a thermal conductivity k = 50 W/m K has a heat transfer rate of 125 kW/m². Assuming steady state heat transfer, calculate the temperature difference across the plate. A4 A siphon pipe of diameter 250 mm contracts to a diameter of 100 mm over a vertical distance of 5 m before emptying into a river. If the pipe is full of water flowing at 0.1 m/s at the 250 mm section, what is the absolute pressure at this point, and what is the water velocity just before it vents into the river? You should assume the pipe to be frictionless and take atmospheric pressure to be 100 kPa. AS A 30 mm diameter aluminium pipe is used to carry hot water, the external surface of the pipe is subjected to a convective heat transfer coefficient of h = 8 W/m²K. Find the heat loss per meter length of the pipe when the external surface temperature is 60°C and the surrounding air is a constant 20°C. A6 After sunset, radiant energy can be sensed by a person standing near a brick wall. Such walls frequently have surface temperatures around 44 °C, and typical brick emissivity values are on the order of 0.92. What would be the radiant thermal flux

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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A1 A small model water turbine is tested in a flume where C, is measured to be 0.38. Assuming dynamic similarity exists, calculate the power output of a full-size turbine of diameter 12 m operating in a tidal stream, where the water density is 1030 kg/m³, μ = 1.307-³ Ns/m² and maximum water velocity of 2.2 m/s. A2 A U-tube manometer containing a light oil (specific gravity 0.7) is used to measure the static pressure of air (density 1.2 kg/m³) in a container. If the gauge pressure is 206 N/m², what is the indicated height of oil? A steel plate 30 mm thick with a thermal conductivity k = 50 W/m Khas a heat transfer rate of 125 kW/m². Assuming steady state heat transfer, calculate the temperature difference across the plate. A4 A siphon pipe of diameter 250 mm contracts to a diameter of 100 mm over a vertical distance of 5 m before emptying into a river. If the pipe is full of water flowing at 0.1 m/s at the 250 mm section, what is the absolute pressure at this point, and what is the water velocity just before it vents into the river? You should assume the pipe to be frictionless and take atmospheric pressure to be 100 kPa. A5 A 30 mm diameter aluminium pipe is used to carry hot water, the external surface of the pipe is subjected to a convective heat transfer coefficient of h=8 W/m² K. Find the heat loss per meter length of the pipe when the external surface temperature is 60°C and the surrounding air is a constant 20°C. A6 After sunset, radiant energy can be sensed by a person standing near a brick wall. Such walls frequently have surface temperatures around 44 °C, and typical brick emissivity values are on the order of 0.92. What would be the radiant thermal flux per square metre from a brick wall at this temperature? A3
Transcribed Image Text:A1 A small model water turbine is tested in a flume where C, is measured to be 0.38. Assuming dynamic similarity exists, calculate the power output of a full-size turbine of diameter 12 m operating in a tidal stream, where the water density is 1030 kg/m³, μ = 1.307-³ Ns/m² and maximum water velocity of 2.2 m/s. A2 A U-tube manometer containing a light oil (specific gravity 0.7) is used to measure the static pressure of air (density 1.2 kg/m³) in a container. If the gauge pressure is 206 N/m², what is the indicated height of oil? A steel plate 30 mm thick with a thermal conductivity k = 50 W/m Khas a heat transfer rate of 125 kW/m². Assuming steady state heat transfer, calculate the temperature difference across the plate. A4 A siphon pipe of diameter 250 mm contracts to a diameter of 100 mm over a vertical distance of 5 m before emptying into a river. If the pipe is full of water flowing at 0.1 m/s at the 250 mm section, what is the absolute pressure at this point, and what is the water velocity just before it vents into the river? You should assume the pipe to be frictionless and take atmospheric pressure to be 100 kPa. A5 A 30 mm diameter aluminium pipe is used to carry hot water, the external surface of the pipe is subjected to a convective heat transfer coefficient of h=8 W/m² K. Find the heat loss per meter length of the pipe when the external surface temperature is 60°C and the surrounding air is a constant 20°C. A6 After sunset, radiant energy can be sensed by a person standing near a brick wall. Such walls frequently have surface temperatures around 44 °C, and typical brick emissivity values are on the order of 0.92. What would be the radiant thermal flux per square metre from a brick wall at this temperature? A3
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