3102152
Descripción
Test por Nicolle Katherine, actualizado hace más de 1 año
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Creado por Nicolle Katherine
hace más de 9 años
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Pregunta 1
Pregunta
A jet aircraft flies at a speed of 550 mph at an altitude of 35 000 ft., where the temperature is -66deg F. Determine the ratio of the aircraft, v to that of the speed of sound, c at the specified altitude. Assume k=1.40.
Respuesta
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13.71
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11.91
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0.829
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0.874
Pregunta 2
Pregunta
Two water streams at 15 °C, one flowing at 3 kg s -1 and another flowing at 2 kg s -1 , discharge into a tank at steady state. The tank has an exit pipe (inside diameter = 100 mm), which is connected to a horizontally oriented nozzle that discharges the water through a tube with an inside diameter of 4 mm. What is the flow rate of the water stream in the tube after it passes the nozzle (ft/s).
Respuesta
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1306.8 ft/s
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0.016 ft/s
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0.1306 ft/s
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16.02 ft/s
Pregunta 3
Pregunta
What will be the rated capacity (gpm) of a 5 inch diameter impeller centrifugal pump operating at a speed of 3450 rpm capable of generating a head of 80 ft. water?
Respuesta
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111
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222
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44
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123
Pregunta 4
Pregunta
What is the power requirement of a fan in kW in order to supply air at a rate of 1500 m3/hr at a total discharge pressure of 10.35 kPa?
Respuesta
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0.431
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43.1
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4.31
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0.0431
Pregunta 5
Pregunta
A differential pressure gauge is connected across the taps of a pitot tube. When this pitot tube is used in wind tunnel test the gauge indicates a change in pressure of 730 Pa. What is the air velocity in the tunnel given that the pressure and temperature in the tunnel are 98 kPa and 20 deg Celsius
Respuesta
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0.353 m/s
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353 m/s
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3.53 m/s
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35.3 m/s
Pregunta 6
Pregunta
A venture meter is to be installed in a 100 mm diameter pipe to measure the flow of water. The maximum flow rate is expected to be 75m3/hr at 15deg C. The manometer used to measure the differential pressure is to be filled with mercury and water, is to fill the leads above the surfaces of the mercury. The water temperature will be 15 deg C throughout. If the maximum manometer reading is to be 1.25 m and the venture coefficient is 0.98. What throat diameter(mm) should be specified for the venturi?
Respuesta
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39.2
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0.39
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3.9
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0.0392
Pregunta 7
Pregunta
Water is pumped to the top of a covered tank, elevated 50 m from the centerline of the pump. If the water entered the pump at a pressure of 100 kPa through a 2-inch sch. 40 steel pipe and delivered at 350 kPa through the same pipe size to the elevated tank, how long will it take for the 2-horsepower pump to fill the 20-m 3 tank?
Respuesta
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0.0275 h
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16.6 min
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0.275 h
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165. 22 min
Pregunta 8
Pregunta
Pick out the wrong statement.
Respuesta
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The form drag is dependent upon the occurrence of a wake.
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The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent) varies linearly as the radial distance.
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Existence of the boundary layer in fluid flow is because of viscosity of the fluid
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An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity.
Pregunta 9
Pregunta
The ratio of inertial forces to elastic forces is called the __________ number.
Respuesta
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Reynolds
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Euler
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Mach
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Weber
Pregunta 10
Pregunta
Theoretical head developed by a centrifugal pump does not depend upon the __________ the impeller.
Respuesta
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radius of
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speed of
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fluid velocity leaving
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none of these
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