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stealth61 [152]
3 years ago
8

Which of the following do pumps provide to a fluid power system?

Engineering
1 answer:
Soloha48 [4]3 years ago
3 0

Answer:

Energy

Explanation:

The power of the driver (electrical motor for example), drives a piston in a positive displacement pump, or an impeller in a centrifugal pump.

Creates suction (pressure differential) which causes fluid to flow

Energy is converted to differential pressure.

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Water evaporating from a pond does so as if it were diffusing across an air film 0.15 cm thick. The diffusion coefficient of wat
Elodia [21]

Answer:

1.25 cm/day

Explanation:

An air thickness , (l) = 0.15 cm

Air Temperature =

(T_a)=20^0C = (20+273)K\\(T_a)=293K

Mass Diffusion coefficient (D) = 0.25cm^2/sec

If the air pressure (P_a) = 0.5 P_{sat}

We are to determine how fast will the water (H_2O) level drop in a day.

From the property of air  at T = 20° C

P_{sat} = 2.34 from saturated water properties.

The mass flow of (H_2O)  can be calculated as:

H_2O = \frac{D}{\phi} \delta C

where:

\delta C = \frac{P_{sat}*P_a}{RT }

R(constant) = 8.314 kJ/mol.K

\delta C = \frac{2.34*0.5}{8.314*293 }

\delta C = 4.803*10^{-4}\\ \delta C =0.48*10^{-3} mol/m^3\\ \delta C = 0.48*10^{-6} mol/cm^3

Since 1 mole = 18 cm ³ of water

0.48*10^{-6}mol/cm^3 will be: (0.48*10^{-6}mol/cm^3 *18)cm^3/cm^3

\delta C = 8.64 * 10^{-6}

Again:

H_2O = \frac{D}{\phi} \delta C

= \frac{0.25}{0.15}*8.69*10^{-6} \frac{cm^2/sec}{cm}

=1.4481*10^{-5} \frac{cm^2/sec}{cm}

Converting the above value to cm/day: we have:

1.448*10^{-5}*3600*24\frac{cm}{s}*\frac{s}{yr}*\frac{yr}{day}

= 1.25 cm/day

∴ the rate at which  the water level drop in a day = 1.25 cm/day

7 0
3 years ago
1. Using a typical frequency value for the initiating event and PFD values provided in class lectures, estimate the mishap or co
algol13

Answer:

a basic process control system is necessary as long as the work by the personnel in charge is efficient, this reduces by 90% the errors or failures to calculate the system to operate

Explanation:

Production staff human error

 Another reason why a breakdown can occur is due to an error of the production personnel. This error, in turn, can originate from:

Error of interpretation of an indicator during the normal operation of the equipment, which causes the operator or driver of the installation to make the wrong decision

Incorrect performance in the event of a machine failure. For example, introducing water into a hot boiler in which water has been lost visually; as it is not known how much water is inside, it may be empty and hot, so when water is introduced it will produce instant vaporization, with the consequent increase in pressure that can even cause the boiler to explode.

Physical factors of the operator: this may not be in perfect condition to carry out his work, due to dizziness, sleep, fatigue accumulated by long working hours, illness, etc.

Psychological factors, such as demotivation, problems external to work, etc., greatly influence the proliferation of operational errors

Lack of clear systematic instructions, such as procedures, technical instructions, etc., or poor implementation of these  Lack of training

5 0
3 years ago
: A cyclical load of 1500 lb is to be exerted at the end of a 10 in. long aluminium beam (see Figure below). The bar must surviv
scZoUnD [109]

Answer:

the minimum diameter of the bar is 1.634 in

4 0
3 years ago
Please help me with this. Picture
qwelly [4]

Answer:

^547.'":8765456\⇆⊇⊇ys p)(ay^547.'":8765456\⇆⊇⊇ys p)(*

iuytrT&*7654567iol;';";lk↓ωω*&65∴∀Hgtre

6и876&*b n™Ο65656&^cxCv876и876&*b n™‰‰ay^547.'":87765^&*  kIKUYtb

Explanation:

=yx^z3

ÜÜÜ

5 0
3 years ago
How much does it cost to replace a roof on a 2,200 square foot house.
Norma-Jean [14]

Answer:

An estimated amount of $8,200 to $12,000

Explanation:

~~It all really depends on what materials you have purchased for the replacement.

~~If you're to choose lower-quality materials the cost would be less but high-quality ones will be more expensive.

(The answer is if you're most likely to purchase asphalt shingles)

Hope this Helps!

7 0
2 years ago
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