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:
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Answer:
3 parameters are passed into the function.
1 value will be returned from the function.
Explanation:
From the function definition "function sum(first, second, third)", we can see that there are three value/parameters are passed in the function.Then variable "result" will be the sum all the three values. After that it will print the all three values in new line. Then the function will return one value which is the sum of all three that is value of "result".As there is only one value returned by the return statement in the function.
Answer:
<em>What are your thoughts about this?</em>
Explanation:
A question that can be answered with yes or no is a closed question.
Answer: Only A and C
Explanation: Default constructor is a constructor that has parameters with the values that are default or has no arguments/parameter present. Default constructor is not declared in the class rather it gets generated by itself when not defined.
Class is defined with data members, functions, objects etc are considered as per the requirement given by the user .It is the user defined concept.
Statement (B) is incorrect because static method is used for accessing the static members of the particular class and manipulate the value of it.
Thus, only statement (A) and (C) are correct.
