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IgorLugansk [536]
3 years ago
9

What are the advantages of mine shaft gear and the disadvantaged​

Computers and Technology
1 answer:
romanna [79]3 years ago
5 0

Answer:

One sheave means that you are using a single drum winder. They are the worst! Double drum winders control easier, brake better and are much more efficient. They save time ( two skips or cages) and can be clutched to perform faster shift transport. A single drum is slow, unbalanced and can be a nightmare if it trips out during hoisting. If the brake system is not perfect it can be a real hairy experience. For a runaway single drum, there is no counterbalance effect. It always runs to destruction. With a double drum, the driver still has a chance to control the winder to a certain extent and he has two sets of brakes to rely on. A single sheave could also mean a shaft with a single compartment. No second means of escape unless there are ladders or stairways. Not a very healthy situation.

Those are just a few points. I am sure much more can be said in favor of a double drum winder and two or more sheaves in the headgear. Most of the shafts I have worked at have multiple winders and up to ten compartments. They all have a small single drum service winder for emergencies and moves of personnel during shift times. They are referred to as the Mary - Annes. Apparently, the name originated in the U.K. where an aristocratic mine owner named the first such winder after his mistress.

Explanation:

<em>Hope you got it </em>

<em>If you have any question just ask me</em>

<em>If you think this is the best answer please mark me as BRAINLIEST</em>

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hope it helps! :)

3 0
3 years ago
The following SQL statement contains which type of subquery? SELECT title FROM books WHERE EXISTS (SELECT isbn FROM orderitems W
Rudiy27

Answer:

(a) Correlated.

Explanation:

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How to write a C++ program that allows a user to enter their rating of the three movies in the Dark Knight Trilogy and then disp
8_murik_8 [283]

The program is an illustration of arrays.

Arrays are used to hold multiple values in one variable.

The program in C++ where comments are used to explain each line is as follows:

#include <iostream>

using namespace std;

int main(){

   //This declares an array of three elements for the three ratings

   int ratings[3];

   //This initializes the sum of the ratings to 0

   int total = 0;

   //The following iteration gets input for the three ratings

   for(int i = 0; i<3;i++){

       cin>>ratings[i];

       //This calculates the sum of all inputs

       total+=ratings[i];

   }

   //This declares and initializes the lowest and the highest ratings

   int lowest = ratings[0], highest = ratings[0];

   //This iterates through the array

   for(int i = 1; i<3;i++){

       //The following if condition determines the lowest rating

       if (lowest > ratings[i]){    lowest = ratings[i];        }

       //The following if condition determines the highest rating

       if (highest < ratings[i]){            highest = ratings[i];        }

   }

   //This prints the output header

   cout<<"The ratings are: ";

   //The following iteration prints the three ratings

   for(int i = 0; i<3;i++){

       cout<<ratings[i]<<" ";   }

   //The prints the highest ratings

cout<<endl<<"Highest: "<<highest<<endl;

   //The prints the lowest rating

   cout<<"Lowest: "<<lowest<<endl;

   //The prints the average rating

cout<<"Average: "<<total/3<<endl;

   return 0;

}

At the end of the program, the ratings entered, the highest rating, the lowest rating, and the average of the ratings are printed.

See attachment for sample run

Read more about similar programs at:

brainly.com/question/13261254

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Stels [109]
Climate seems like the correct answer
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