Engineering, 08.06.2021 18:20 jade611135
Which type of device can be used to measure flow velocities in unconfined flows? In addition to all these, experiments need very high accuracy?
A) Turbine Flowmeters
B) Paddlewheel flowmeters
C) Doppler-effect ultrasonic flowmeters
D) Thermal (Hot-Wire and Hot-Film) Anemometers
Answers: 1
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Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false
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Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
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Two slings are used to lift a girder of length l and uniform weight per unit length. what is the best position for the slings if the bending moment due to the weight of the girder is to be kept to a minimum?
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Consider two concentric spheres forming an enclosure with diameters of 12 cm and 18 cm the spheres are maintained at uniform temperatures ti-50°c and t2 = 250°c and have emissivities .45 and .8, respectively. determine the net rate of radiation heat transfer between the two spheres per unit surface area.
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