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14 days ago

Gina is about to use a fire extinguisher on a small fire. What factor determines the type of extinguisher she should use

Engineering

2 answers:

grin007 [323]14 days ago

8 0

There are five distinct types of fire extinguishers, each identifiable by specific color codes.

Red - Water-based

Creme - Foam-based

Blue - Powder-based

Black - CO2 or carbon dioxide-based

Yellow - Wet chemical-based

The type of fire extinguisher required is determined by the class of fire being dealt with.

Class A - Combustible materials (e.g., paper, wood) Recommended extinguishers - Red, Creme, Blue, and Yellow. (Avoid using Black)

Class B - Flammable liquids (e.g., paint, petrol, alcohol) Recommended extinguishers - Creme, Blue, and Black. (Avoid using Red or Yellow)

Class C - Flammable gases (e.g., butane, methane) Recommended extinguishers - Blue (Avoid using Red, Creme, Black, or Yellow)

Class D - Flammable metals (e.g., lithium, potassium) Recommended extinguishers - Blue (Avoid using Red, Creme, Black, or Yellow)

Class F - Deep fat fryers (e.g., chip pans) Recommended extinguishers - Yellow (Avoid using Red, Creme, Blue, or Black)

Electrical - any kind of electrical device

(e.g., computers, generators) Recommended extinguishers - Blue and Black (Avoid using Red, Creme, or Yellow)

iogann1982 [368]14 days ago

3 0

There are five distinct categories of fire extinguishers, each identified by its specific color code.
Red - Utilizes water
Creme - Functions with foam
Blue - Employs powder
Black - Uses CO2 or carbon dioxide
Yellow - Based on wet chemicals

The type of fire extinguisher required is dictated by the classification of the fire.

Class A - Involves combustible materials (such as paper or wood). Suitable extinguishers include Red, Creme, Blue, and Yellow. (Black should be avoided)

Class B - Pertains to flammable liquids (like paint, petrol, or alcohol). Recommended extinguishers include Creme, Blue, and Black. (Red and Yellow should not be used)

Class C - Involves flammable gases (for instance, butane or methane). The only extinguisher to use is Blue. (Avoid Red, Creme, Black, or Yellow)

Class D - Concerns flammable metals (such as lithium or potassium). Only Blue is the suitable extinguisher here. (Do not use Red, Creme, Black, or Yellow)

Class F - Applies to deep fat fryers (e.g., chip pans). The effective extinguisher is Yellow. (Red, Creme, Blue, and Black are not appropriate)

Electrical fires pertain to any type of electrical equipment (including computers and generators). The extinguishers allowed are Blue and Black. (Red, Creme, or Yellow should not be utilized)

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14 days ago

Write multiple if statements. If car_year is 1969 or earlier, print "Few safety features." If 1970 or later, print "Probably has

alex41 [359]

Answer:

The following includes the explanation, code, and resulting outputs.

C++ Code:

#include <iostream>

using namespace std;

int main()

{

int year;

cout<<"Enter the car model year."<<endl;

cin>>year;

if (year<=1969)

{

cout<<"Few safety features."<<endl;

}

else if (year>=1970 && year<1989)

{

cout<<"Probably has seat belts."<<endl;

}

else if (year>=1990 && year<1999)

{

cout<<"Probably has antilock brakes."<<endl;

}

else if (year>=2000)

{

cout<<"Probably has airbags."<<endl;

}

return 0;

}

Explanation:

The challenge involved displaying feature messages for a car based on its model year.

Logical conditions were integrated into the coding. The implementation has been verified with multiple inputs producing the expected results.

Output:

Enter the car model year.

1961

Few safety features.

Enter the car model year.

1975

Probably has seat belts.

Enter the car model year.

1994

Probably has antilock brakes.

Enter the car model year.

2005

Probably has airbags.

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1 month ago

A well-insulated rigid tank contains 1.5 kg of a saturated liquid–vapor mixture of water at 200 kPa. Initially, three-quarters o

Daniel [329]

Answer:

The change in entropy of the steam is 2.673 kJ/K

Explanation:

The mass of the liquid-vapor mixture is 1.5 kg

The mass in the liquid phase is calculated as 3/4 × 1.5 kg = 1.125 kg

The mass in the vapor phase is calculated as 1.5 - 1.125 = 0.375 kg

According to the steam tables

At a pressure of 200 kPa (200/100 = 2 bar), the specific entropy of steam is found to be 7.127 kJ/kgK

The entropy of steam can be calculated as specific entropy multiplied by mass = 7.127 × 0.375 = 2.673 kJ/K

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22 days ago

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1 month ago

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