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g100num [7]
4 years ago
10

A single phase, 50-KVA, 2400-240-volt, 60 Hz distribution transformer has the following parameters: •

Engineering
1 answer:
never [62]4 years ago
8 0

Answer:

B) voltage at the sending end of the feeder = 2483.66 v

Explanation:

attached below is the the equivalent circuits and the remaining solution  for option A

B) voltage = 2400 v

   I  = \frac{50*10^3}{2400}  =  20.83 A

calculate voltage at sending end ( Vs )

Vs = 2400 +  20.83 ∠ -cos^-1 (0.8) ( 0.75*2 + 0.5 + j 2 + j2 )

hence Vs = 2483.66 ∠ 0.961

therefore voltage at the sending end = 2483.66 v

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Steam at 40 bar and 500o C enters the first-stage turbine with a volumetric flow rate of 90 m3 /min. Steam exits the turbine at
a_sh-v [17]

Answer:

(a) 62460 kg/hr

(b) 17,572.95 kW

(c) 3,814.57 kW

Explanation:

Volumetric flow rate, G = 30 m³ / 1 min => 90 / 60 => 1.5

Calculate for h₁ , h₂ , h₃

h₁ is h at P = 40 bar, 500°C => 3445.84 KJ/Kg

Specific volume steam, ц = 0.086441 m³kg⁻¹

h₂ is h at P = 20 bar, 400°C => 3248.23 KJ/Kg

h₃ is h at P = 20 bar, 500°C => 3468.09 KJ/Kg

h₄ is hg at P = 0.6 bar from saturated water table => 2652.85 KJ/Kg

a)

Mass flow rate of the steam, m = G / ц

m = 1.5 / 0.086441

m = 17.35 kg/s

mass per hour is m = 62460 kg/hr

b)

Total Power produced by two stages

= m (h₁ - h₂) + m (h₃ - h₁)

= m [(3445.84 - 3248.23) + (3468.09 - 2652.85)]

= m [ 197.61 + 815.24 ]

= 17.35 [1012.85]

= 17,572.95 kW

c)

Rate of heat transfer to the steam through reheater

= m (h₃ - h₂)

= 17.35 x (3468.09 - 3248.23)

= 17.35 x 219.86

= 3,814.57 kW

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3 years ago
What is a type of technology that can be attached to a tag and used to identify postal packages ​
nydimaria [60]
Here’s the answer
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5 0
3 years ago
Cutting and abrasive machining are the two major material processes. List the differences between Cutting tool and Abrasive mach
STatiana [176]

Answer:

Explained

Explanation:

Cutting tools:

 1. Cutting tools can either be single point or multi point.

2. Cutting tools can have variety of material depending on use like ceramics, diamonds, metals, CBN, etc.

3.Cutting tools have definite shapes and geometry.

Abrasive machining tools

1. Abrasive tools are always multi point tools.

2. Abrasive tools composed of abrasives bounded in medium of resin or metal.

3. They do not have definite geometry of shape

7 0
4 years ago
Air leakage tests are conducted by using a large fan to blow air into a structure.
lord [1]
TRUE
An airtightness test it’s a whole building test that measures how easy it is for air to leak through a building enclosure or “skin” one common method is to use a large fan or “blower” to extract air from or supply air to the building.
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Ada Lovelace Day, celebrating Ada, Countess of Lovelace as the first computer programmer, is traditionally celebrated on the sec
snow_lady [41]

Ada Lovelace Day, celebrating Ada, Countess of Lovelace as the first computer programmer, is traditionally celebrated on the second Tuesday of October each year is given below

Explanation:

1.The second Tuesday of every October marks Ada Lovelace Day, a day founded in 2009 by technologist Suw Charman-Anderson, to celebrate the achievements of women in Stem careers (science, technology, engineering and mathematics), and was created in memory of one in particular: Ada Lovelace, the first computer programmer.

2.Ada Lovelace: The First Computer Programmer. Ada Lovelace has been called the world's first computer programmer. ... By 1834 he had moved on to design his Analytical Engine, the first general purpose computer, which used punch cards for input and output. This machine also lacked financing and was never built.

3.Born two centuries ago, Ada Lovelace was a pioneer of computing science. She took part in writing the first published program and was a computing visionary, recognizing for the first time that computers could do much more than just calculations.

4.Through Babbage, Ada began studying advanced mathematics with University of London professor Augustus de Morgan. Ada was fascinated by Babbage's ideas. Known as the father of the computer, he invented the difference engine, which was meant to perform mathematical calculations.

5.It's Ada Lovelace Day today which means it is a time to celebrate the achievements of women working in the fields of science, technology, engineering and mathematics (STEM). Now in its eighth year, the annual celebration was founded by journalist and software activist Suw Charman-Anderson.

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