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2 years ago

8

If your PPE doesn't fit properly or needs repair, you should continue to wear it until your employer gets around to buying new P

PE.

1 answer:

Lynna [10]2 years ago

8 0

Answer:

no you always wear a PPE that fits.

You might be interested in

Why do overhung rotors need to be balanced on or near resonance?

Anika [276]

Explanation:

Balancing:

Generally balancing are of two types

1.Static balancing:In this only force balancing is done.

2.Dynamic balancing:in this force as well as moment balancing is done.

Balancing become compulsory for over hanging rotor because unbalance force produce lots of vibration and lots of sound due to this rotor or the whole system in which rotor is attached can be damage.

5 0

2 years ago

A 10-mm drill rod was heat-treated and ground. The measured hardness He was found to be 300 Brinell. Estimate the endurance stre

lesya [120]

Answer:

The endurance strength for the rod is 434.6 MPa

Explanation:

Since the rod is used in rotating bending, we need to use Marin equation given by

$S=k_ak_bS'_e$

Here S stands for the endurance strength for rotating bending, $S'_e$ is the endurance strength, and $k_a \text{ and } k_b$ are the parameters for Marin surface modification factor.

Endurance strength.

We can start finding the endurance strength, from the directions we know that the hardness $H_e$ was found to be 300 Brinell, thus for such value we can find the ultimate tensile strength using

$S_{ut}=3.41H_e$

Replacing the hardness we get

$S_{ut}=3.41(300) MPa \\ S_{ut}=1023 MPa$

Now since the ultimate tensile strength has a value less than 1400 MPa, we can find the endurance strength using

$S'_e =0.5S_{ut}$

Replacing the tensile strength we get

$S'_e=0.5(1023) MPa \\ S'_e = 511.5 MPa$

Parameters for Marin surface modification factor.

From the directions we know that the drill rod has a ground surface finish, so then from tables we get

$a=1.58 \text{ and } b = -0.085$

Thus the surface factor will be

$k_a=a(S_{ut})^b$

Replacing values and the ultimate tensile strength

$k_a=(1.58)1023^{-0.085}\\k_a=0.8766$

Then we can find the rotating shaft factor, for a diameter of 10 mm, we can use the equation

$k_b=1.24d^{-0.107}$

Replacing the diameter we get

$k_b=1.24(10)^{-0.107}\\k_b=0.9692$

Estimating endurance strength for rotating shaft.

We can replace now all values we have found in Marin equation.

$S=k_ak_bS'_e$

$S=(0.8766)(0.9692)(511.5) MPa$

$S=434.6 MPa$

Thus the endurance strength for the rod is 434.6 MPa

3 0

2 years ago

An inventor claims to have devised a cyclical engine for use in space vehicles that operates with a nuclear fuel generated energ

slava [35]

Answer:

Inventor claim is not valid.

Explanation:

Given that

Source temperature = 510 K

Sink temperature = 270 K

Power produce = 4.1 KW

Heat reject = 15,000 KJ/h

Heat reject =4.16 KW

As we know that

Heat addition = Heat rejection + Power produce

Heat addition = 4.16 + 4.1 KW

Heat addition = 8.16 KW

So efficiency of engine

$\eta =\dfrac{Power\ produces}{heat\ added}$

$\eta =\dfrac{4.1}{8.16}$

$\eta =0.502$

Now check the maximum efficiency can be possible by using Carnot heat engine

As we know that efficiency of Carnot heat engine given as

$\eta =1-\dfrac{T_L}{T_H}$

By putting the value

$\eta =1-\dfrac{T_L}{T_H}$

$\eta =1-\dfrac{270}{510}$

$\eta =0.47$

So the efficiency of Carnot cycle is less than the efficiency of above given engine.So this engine is not possible.It means that inventor claim is not valid.

6 0

2 years ago

Assign numMatches with the number of elements in userValues that equal matchValue. userValues has NUM_VALS elements. Ex: If user

Thepotemich [5.8K]

Answer:

import java.util.Scanner;

public class FindMatchValue {

public static void main (String [] args) {

Scanner scnr = new Scanner(System.in);

final int NUM_VALS = 4;

int[] userValues = new int[NUM_VALS];

int i;

int matchValue;

int numMatches = -99; // Assign numMatches with 0 before your for loop

matchValue = scnr.nextInt();

for (i = 0; i < userValues.length; ++i) {

userValues[i] = scnr.nextInt();

}

/* Your solution goes here */

numMatches = 0;

for (i = 0; i < userValues.length; ++i) {

if(userValues[i] == matchValue) {

numMatches++;

}

}

System.out.println("matchValue: " + matchValue + ", numMatches: " + numMatches);

}

}

8 0

2 years ago

The following program includes fictional sets of the top 10 male and female baby names for the current year. Write a program tha

otez555 [7]

Answer:

Define Variables and Use List methods to do the following

Explanation:

#<em>Conjoins two lists together</em>

all_names = male_names.union(female_names)

#<em>Finds the names that appear in both lists, just returns those</em>

neutral_names = male_names.intersection(female_names)

#<em>Returns names that are NOT in both lists</em>

specific_names = male_names.symmetric_difference(female_names)

3 0

2 years ago

Read 2 more answers