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3 years ago

Why is the lubrication system of an internal combustion engine equipped with an oil filter?

Engineering

1 answer:

Ierofanga [76]3 years ago

6 0

Answer:

to filter out any impurities such as metal shavings in the oil

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Identify the careers that match the descriptions. Operates machines that cut through rocks underground so natural resources can

attashe74 [19]

Answer:

1. Operates machines that cut through rocks underground so natural resources can be harvested: Mine-cutting and channeling operator

2. Studies and manages natural resources to protect the environment: Conservation Scientist

3. Manages forests for conservation, human enjoyment, and harvesting: Forster

4. Inspects, measures, and classifies logs based on quality: Log grader or scaler

5. Operates machinery to cut down trees and move logs: Logging equipment Operator

Explanation:

Conservation Scientist – studies and manages natural resources to protect the environment and support human uses of natural resources

Forester – manages forests for conservation, human enjoyment, and tree harvesting

Mine Cutting and Channeling Machine Operator – operates machinery in underground mines that bring natural resources up to the surface for human use

Logging Equipment Operator – operates logging machinery, such as tractors or bulldozers

Log Grader or Scaler – inspects, measures, and classifies logs based on their quality

4 0

4 years ago

Read 2 more answers

A thick casting with a thermal diffusivity of 5 x 10-6 m2/s is initially at a uniform temperature of 150oC. One surface of the c

fredd [130]

Answer:

$T_o = 141.81 ^0C$

Explanation:

Given that;

Thermal diffusivity $\alpha = 5 \times 10 ^{-6} m^2/s$

Thermal conductivity $k = 20 \ W/m.K$

Heat transfer coefficient h = ( we are to assume the imposed surface temperature ) = 20 W/m².K

Initial temperature = 150 ° C = (150+273) K = 423 K

Then coolant temperature with which the casting is exposed to = 20° C = (20+273)K = 293 K

Time = 40 seconds

Length = 20mm = 0.02 m

The objective is to determine the temperature at the surface at a depth of 20 mm after 40 seconds.

$Bi = \dfrac{hL}{k}$

$Bi = \dfrac{20*0.02}{20}$

Bi == 0.02

$\tau = \dfrac{\alpha t}{L^2}$

$\tau= \dfrac{5*10^{-6 }* 40}{0.020^2}$

$\tau = 0.5$

For a wall at 0.2 Bi

$A_1 = 1.0311$

$\lambda _1 = 0.4328$

Therefore;

$\dfrac{T_o - T_{\infty}}{T_i - T_{\infty}}= A_1 e ^{-( \lambda_1^2 \ \tau)$

$\dfrac{T_o - 293 }{423 - 293}= 1.0311 \times e ^{-( 0.438^2 \times 0.5 )$

$\dfrac{T_o - 293 }{423 - 293}= 1.0311 \times e ^{-( 0.0959 )$

$\dfrac{T_o - 293 }{130}= 1.0311 \times 0.9085$

$\dfrac{T_o - 293 }{130}= 0.937$

$T_o - 293= 0.937 \times 130$

$T_o - 293= 121.81$

$T_o = 121.81+ 293$

$T_o = 414.81 \ K$

$T_o = (414.81 - 273)^0C$

$T_o = 141.81 ^0C$

4 0

4 years ago

Tech A says that LED brake lights illuminate faster than incandescent bulbs. Tech B says that LED brake lights have

nikdorinn [45]

Answer:

Both

Explanation:

3 0

3 years ago

PLEASE ANSWEAR FAST!!! <br> What does it mean if E˂1

Citrus2011 [14]

Scientific notation is another way to write a number. In scientific notation, the letter E is used to mean "10 to the power of." For example, 1.314E+1 means 1.314 * 101 which is 13.14 . Scientific notation is merely a format used for input and output.

5 0

3 years ago

Which of the following statements regarding the dermis is FALSE?

vova2212 [387]

Answer:A

Explanation:the dermis is made up of fibrous and elastic tissues not fat tissues.. So the first statement is wrong.

7 0

4 years ago