Test
Sin título
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Preguntas del test (20)
1The fluid in a manometer tube is 60% water and 40% alcohol (SG=0.83). What is the manometer fluid height difference (in ft)if a 13.7 psi pressure is applied across the two ends of manometer? [blank_start]38.09ft[blank_end]
- A38.09ft
2Determine the resistance (in F-h/BTU) of a hollow cylinder with an inside and outside radius of 2 in and 2.1 in, respectively. The length of the cylinder is 4 ft while the thermal conductivity is 21 BTU/hr-ft-F. [blank_start]9.24 x10^-5[blank_end]
- A9.24 x10^-5
3Calculate the amount of energy (in BTU) required to heat the air in a house 28 ft by 27 ft by 46 ft from 18 to 111 oF. The density of air is 0.08 lb/ft3. [blank_start]62096.03[blank_end]
- A62096.03
4What is the Reynolds number of a fluid flowing in a tube with an inside diameter of 1 inches? The viscocity is 1.353 x 10^ -5 lb/ft-s and the mass flow rate is 79 lb/h. [blank_start]24775.56[blank_end]
- A24775.56
5What is the kinetic energy if the mass is 35 lb and the velocity is 21 ft/s in ft-lbf? [blank_start]239.86[blank_end]
- A239.86
6What is the absolute pressure (kPa) if the vacuum pressure is 39 kPa? [blank_start]62.33[blank_end]
- A62.33
7What is the oAPI if the specific gravity at 15.6 oC is 0.925? [blank_start]21.47[blank_end]
- A21.47
8A 542 kg hammer of a pile driver is lifted 3.1 meters above a piling head. If the hammer is released, what will be its velocity (in m/s) at the instant it strikes the piling? [blank_start]7.80[blank_end]
- A7.80
9A Carnot engine receives 142 BTU of heat form a hot reservoir at 831 °F and rejects 50 BTU of
heat. Calculate the temperature of the cold reservoir. [blank_start]5.21[blank_end]- A5.21
10If the velocity of discharge from a fire hose is 13 m/s and the hose is oriented at 39o from the
horizontal, disregarding air friction, determine the maximum range of discharge (in m). [blank_start]16.85[blank_end]- A16.85
11The maximum thermal efficiency (in %) possible for a power cycle operating between 1,317 °F and 211°F is: [blank_start]62.25[blank_end]
- A62.25
12The thermal conductivity of a fluid is 0.09 BTU/ft-h-F having a kinematic viscosity of 0.0221 ft2/h. If the density and specific heat at constant pressure are 53.2 lbm/ft3 and 0.402 BTU/lb-F, respectively, determine the Prandtl number. [blank_start]5.25[blank_end]
- A5.25
13A ball dropped from the roof of a building 97 m high will hit the ground with a velocity of _____ m/s.
[blank_start]43.62[blank_end]- A43.62
14How far below the water surface (in m) should the center of a vertical square 0.9 m on a side with two sides horizontal to be immersed so that the center of pressure will be 60 mm below the center of gravity? [blank_start]0.67[blank_end]
- A0.67
15In a diesel cycle, what is the expansion ratio if the % clearance is 1/19 while the cut-off ratio is 2.62?
[blank_start]7.63[blank_end]- A7.63
16A power station uses oil-fired boilers which are supplied with fuel from 4 cylindrical tanks, each with 12 m diameter and 11 m high. The calorific value of the oil is 38,039 kJ/kg and its relative density is 0.78. The output from the power station is 77 MW. Assuming the only 22% of the heat input is converted to into electrical energy output, how long will the boilers run (in days) on the oil in the tanks. [blank_start]4.7[blank_end]
- A4.7
17A centrifugal pump uses a 139,170 rpm motor to pump 112,052 kg/min of standard temperature water and has a pressure rise from 3 bar to 37 bar using a 0.1 cm diameter impeller. The inlet diameter is 0.38 cm and the outlet diameter is 0.15 cm. The inlet and outlet are at the same level with each other. What will be your total dynamic head (in m)? [blank_start]902[blank_end]
- A902
18Hot gases at 278 oC flow on one side of a metal plate of 10 mm thickness and air at 48 oC flows on the other side. The heat transfer coefficient of the gases is 32 W/m2-K and that of the air is 29.6 W/m2-K. Calculate the over-all heat transfer coefficient if the value of the thermal conductivity is 7 W/m-K. [blank_start]15.38[blank_end]
- A15.38
19The % clearance of an Otto cycle is 0.161. If the initial pressure is 40 kPag, determine the final pressure. [blank_start]88.16[blank_end]
- A88.16
20An open tank 1.13 meter in diameter and 1.5 m height is filled with diesel oil (S.G. = 0.87). Assuming 72% of its capacity is occupied by the diesel; calculate the absolute pressure (in kPa) of the fluid at the bottom of the tank. [blank_start]110.54[blank_end]
- A110.54
Información
- Descripción
- Test sobre Sin título, creado por Pc Masterrace el 21/06/2023.
- Autor
- Pc Masterrace
- Idioma
- English
- Visitas
- 1
- Etiquetas
- Valoración
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