Answered: What is the pressure of refrigerant…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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30 -

What is the pressure of refrigerant 134a with a temperature of –12.73 °C and a dryness of 0.816?

180 kPa

50 kPa

NS)

168 kPa

454 kPa

TO)

1273 kPa

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19 - There is a water basin with a height of 150 m, which is open to the atmosphere and filled with water. Given that water is fed to a turbine at a flow rate of 200 L/s from the bottom of the water basin, what is the pressure difference between the inlet and outlet of the turbine? a) 1.47 kPa B) 0.736 kPa NS) 736 kPa D) 368 kPa TO) 1470 kPa
A rigid container contains gas at 5 bars. Additional gas is pumped into the system till the pressure reaches 12 bars. Find the amount of the work done on the container if its volume is 3 m^3? a)none b)2100 kJ c)1500 kJ d)2000 kJ e)3600 kJ
5 and 6
Q-1 ) A thin cylinder of inner radius 150 mm and thickness 9 mm is subjected to an internal pressure of 9 MPa. The average circumferential (hoop) stress in MPa isa) 150 MPA b ) 125 MPa c) 175 MPa d ) 200 MPa e) none of these
A gas enclosed in a container that has a piston with a cross-sectional area of 0.15 m2 has a vacuum pressure of 40 kPa and a temperature of 200 °C when the piston moves 20 cm compressing the gas. Determine the work done if the atmospheric pressure of the place is 100 kPa. a) 1.8 kJb) 1.2 kJc) 9.0 kJd) 3.0 kJ
36 - As the air is compressed in a compressor, its temperature is measured to rise from 20°C to 400°C. What is the work given to the compressor? a) 384.9 kJ/kg B) 484.2 kJ/kg NS) 491.9 kJ/kg D) 431.5 kJ/kg TO) 438.6 kJ/kg
10 kg compressed liquid water at 300 kPa pressure and 100°C temperature is heated until its temperature rises up to 400°C at constant pressure. The boundary work done by water is . kJ O A) 4866 B) 6530 O C) 1246 O D) 2028 O E) 3091
38 - What is the specific volume of water with a temperature of 30°C and a pressure of 1 bar? O a) 4,2469 m³/kg O B) 0,79681 m³/kg NS) 0,001004 m²/kg O D) 5,2287 m/kg O TO) 0,001022 m2/kg
What is the work done on a 3 kg cart that accelerates from 5 m/s to 20 m/s. A) 562.5 J B) 22.5 J C) 1125 J D) 45 J
31 - The temperature of the water vapor at the entrance to a turbine is 400ºC and the pressure is 4.5 MPa. The pressure of the saturated steam water at the turbine exit is 75 kPa and the mass flow rate is 41 kg/s. What is the turbine power? a) 21.69 MW B) 15.52 MW NS) 24.55 MW D) 18.96 MW TO) 22.28 MW
28 The gas in a reciprocating cylinder expands and moves the piston 12 cm. If the cabin floor area is 7 cm2 and the atmospheric pressure is 98 kPa, what is the work done by the gas? (1 kPa dm3 = 1J) a) 8232 kJ B) 8.232 kJ NS) 8232 J D) 8.232 J TO) 82.32 J
An engine cylinder is 127mm in diameter, and the piston stroke is 508mm long, the clearance volume is 0.001m3, and the pressure constant is 735kPa. What is the work done in the cylinder during a single stroke? A) 3.995 kJ B) 2.530 kJ C) 8.576 kJ D) 5.287 kJ

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