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grandymaker [24]
3 years ago
15

2. Technician A says that checking ambient temperature as part of an AC performance test is unnecessary. Technician B says that

if the AC compressor hasn't
been operating, the high-side pressure should be high and the low-side pressure should be low. Who is correct?
O A. Technician A
O B. Neither Technician A nor B
O C. Technician B
O D. Both Technicians A and B
Engineering
1 answer:
FromTheMoon [43]3 years ago
3 0

Answer:

The correct option is;

B. Neither Technician A nor B

Explanation:

A performance test is meant to determine the proper functioning of the air conditioning system for fault finding where repair is required

While the engine is powered off it is expected that to have the same pressure or equal pressures in the low-side and high-side pressure and have a pressure expected for a given ambient temperature, such that, as an example, a system with R134a should have a pressure slightly more than 71 psi. at 70°F

Therefore, neither technicians A nor B is correct as the ambient temperature is important for performance testing and  high-side and low-side pressures should be equal when the engine is powered off.

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Carbon dioxide used as a natural refrigerant flows through a cooler at 10 MPa, which is supercritical, so no condensation occurs
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Answer:

The answer which is a calculation can be found as an attached document

Explanation:

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3 years ago
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This method will sell the seat in row i and column j unless it is already sold. A ticket is sold if the price of that seat in th
blsea [12.9K]

Answer:

The solution code is written in Java.

  1. public class Movie {
  2.    private double  [][] seats = new double[5][5];
  3.    private double totalSales;
  4.    public Movie(){
  5.        for(int i= 0; i < this.seats.length; i++){
  6.            for(int j = 0; j < this.seats[i].length; j++){
  7.                this.seats[i][j] = 12;
  8.            }
  9.        }
  10.        this.totalSales = 0;
  11.    }
  12.    public boolean bookSeat(int i, int j)
  13.    {
  14.        if(this.seats[i][j] != 0){
  15.            this.totalSales += this.seats[i][j];
  16.            this.seats[i][j] = 0;
  17.            return true;
  18.        }else{
  19.            return false;
  20.        }
  21.    }
  22. }

Explanation:

The method, bookSeat(), as required by the question is presented from Line 16 - 26 as part of the public method in a class <em>Movie</em>.  This method take row,<em> i</em>, and column,<em> j</em>, as input.

By presuming the seats is an two-dimensional array with all its elements are  initialized 12 (Line 7 - 10). This means we presume the movie ticket price for all the seats are $12, for simplicity.

When the<em> bookSeat() </em>method is invoked, it will check if the current price of seats at row-i and column-i is 0. If not, the current price, will be added to the <em>totalSales </em>(Line 19)<em> </em>and then set the price to 0 (Line 20) and return <em>true</em> since the ticket is successfully sold (Line 21).  If it has already been sold, return <em>false</em> (Line 23).

8 0
4 years ago
What are the 4 types of electricity?
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Answer:

Fossil Fuels 67% (Non-Renewable Source): Coal 41%, Natural Gas 21% & Oil 5.1%

Renewable Energy 16%

Mainly Hydroelectric 92%: Wind 6%, Geothermal 1%, Solar 1%

Nuclear Power 13%

Explanation:

3 0
3 years ago
The 2-kg package leaves the conveyor belt at with a speed of vA = 1 m/s and slides down the smooth ramp. Determine the required
Kisachek [45]

Answer:

Incomplete question: Find the normal reaction the curved portion of the ramp exerts on the package at B if pB = 2 m, the height is 4 m

Answer: The required speed is 8.9107 m/s

The normal reaction is 99.0006 N

Explanation:

Given data:

m = 2 kg

vA = speed = 1 m/s

h = 4 m

g = gravity = 9.8 m/s²

Questions: Determine the required speed of the conveyor, vc = ?

Find the normal reaction, Nc = ?

The required speed applying the conservation of energy:

\frac{1}{2} mv_{A}^{2}  +mgh=\frac{1}{2} mv_{c} ^{2}

Solving for vc:

v_{c} =\sqrt{v_{A}^{2}+2gh  } =\sqrt{1^{2}+(2*9.8*4) } =8.9107m/s

The normal reaction applying the equilibrium of forces:

N_{c} -mg=m(\frac{v_{c}^{2}  }{p_{B} } )

N_{c} =2*(\frac{8.9107^{2} }{2} )+(2*9.8)=99.0006N

3 0
3 years ago
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