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4 years ago

Line(s) indicates passing is allowed if there are no oncoming cars.

Engineering

1 answer:

anygoal [31]4 years ago

5 0

Broken yellow b/c you can’t pass on a double solid yellow

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Which of the following types of valves have a valve stem that moves up and down in a valve guide? Select one: a. Poppet valves b

Alja [10]

Answer:c

Explanation:

thats wht it is

5 0

3 years ago

Read 2 more answers

use engineering judgement to estimate the size of cooling and heating equipment that is needed for a three story, 31,000 square

Blizzard [7]

Answer: operating cost = 22820.736 $

Energy = 32.291 KBtu/sf.

Explanation:

Total heating load is given as = 31000 * 31.25

= 968.75* 103 Btu

From the cooling capacity application;

If 1000ftsquare = 2.8 TR

Therefore 30000ftsquare = x

Where x is the total cooling load,

Therefore x = (30000 * 2.8) / 1000

x = 84TR.

Therefore, the total cooling load, x = 84TR

Using conversion factor;

i.e. converting Btu/hr to MBH

1 MBH = 1000 Btu per hour

we have 968.75* 103 Btu/hr = 968.75 MBH

let us proceed.

Estimating the “Annual operating cost” we first calculate the maximum operating cost (Avg/Annum)

For cooling load:

Max. operatn. Cost = 14 * 84 = 1176$

For heating load:

The average heating loading hours = 1000 hrs.

Conversion to Btu/yr gives = 968.75* 103 * 1000

= 968.75* 106 Btu/yr.

Conversion of 968.75* 103Btu to Kwh gives

1Btu = 0.000293

968.75* 103 Btu = 283.84 Kwh

Therefore, average cost gives;

(8.04/100) $ = 1Kwh

X = 283.84*103

X = 22820.736 $

Operating cost = 22820.736 $

Energy use in KBtu/sf is given as

E = 968.75* 103 / 30000

E = 32.291 KBtu/sf.

8 0

4 years ago

A helical compression spring is to be made of oil-tempered wire, d, of diameter 1–mm with a spring index of C = 10. The spring i

BaLLatris [955]

Question

Determine the minimum hole diameter for the spring to operate in

Answer:

11 mm

Explanation:

Mean spring coil diameter is given from the following relationship

D=cd where C is spring index and d is the diameter of oil-tempered wire

By substitution

D=10*1 mm=10 mm

To find the outer diameter, we add the d to D hence getting the minimum hole diameter as

$D_o= D+d= 10 mm+1 mm= 11 mm$

5 0

4 years ago

Electrical strain gauges were applied to a notched specimen to determine the stresses in the notch. The results were εx=0.0019 a

pickupchik [31]

Answer:

$\sigma_x=451.8MPa$

$\sigma_y=265.99MPa$

Explanation:

$\varepsilon _x=0.0019$

$\varepsilon _y=0.00072$

Poission's ratio for steel =0.28

We know that

$\varepsilon _x=\dfrac{\sigma _x}{E}-\mu\dfrac{\sigma _x}{E}$

$\varepsilon _y=\dfrac{\sigma _y}{E}-\mu\dfrac{\sigma _x}{E}$

Now by putting the values

$0.0019=\dfrac{\sigma _x}{200\times 1000}-0.28\dfrac{\sigma _y}{200\times 1000}$

$0.00072=\dfrac{\sigma _y}{200\times 1000}-0.28\dfrac{\sigma _x}{200\times 1000}$

So $\sigma_x=451.8MPa$

$\sigma_y=265.99MPa$

6 0

4 years ago

State two disadvantages and two advantages of a simple manometer.<br>

Savatey [412]

Advantages include;

1. Easy to fabricate and relatively inexpensive.
2. Good accuracy.

Disadvantages include;
1. It is large in size and bulky.
2. It needs leveling.

3 0

3 years ago