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1 year ago

11

As cylinder pressure and heat increase due to an increased load condition, the fuel injection management system must ___________

_

1 answer:

Temka [501]1 year ago

6 0

possible Answers:

Compensate ⭐⭐⭐⭐⭐

Adjust ⭐⭐⭐⭐⭐

regulate ⭐⭐⭐⭐

tune ⭐⭐⭐

calibrate ⭐⭐⭐

balance ⭐⭐

correct ⭐

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A heating system must maintain the interior of a building at TH = 20 °C when the outside temperature is TC = 2 °C. If the rate o

nasty-shy [4]

Answer:

a) $Q_H=16.4kW$

b) $w=5.467$

c) $w=1.2345$

Explanation:

From the question we are told that:

Interior temperature $TH = 20 °C$

outside temperature is $TC = 2 °C$

Rate $H=16.4kW$

a)

Generally electric resistance heating is the heat transfer from interior building

Therefore

$Q_H=R$

$Q_H=16.4kW$

b)

COP =3

Generally the equation for coefficient of performance is mathematically given by

$COP=\frac{Q_H}{w}$

Therefore

$w=\frac{Q_H}{COP}$

$w=16.4/3$

$w=5.467$

c)

Generally the equation for coefficient of performance is mathematically given by

$COP_r=\frac{TH}{TH-TC}$

$COP_r=\frac{20+273}{(20+273)-(2+273)}$

$COP_r=16.2$

Therefore

$w=1.2345$

$w=20/16.2$

$w=1.2345$

5 0

2 years ago

The acceleration of a point is given. a = 20 t m/s2 When t=0, s = 50 m and v = -8 m/s. What are the position and velocity of the

lidiya [134]

Answer:

v=82 m/s

s=116m

Explanation:

a=20t

$\frac{\mathrm{d} v}{\mathrm{d} t}=20t\\\int\limits dv =\int(20t) dt\\v={10}t^2+c$

using condition given at t=0

$-8=10\times 0^2 +c$

c=-8

now equation becomes

v=10t²-8

v at t= 3s v=82 m/s

again

$\frac{\mathrm{d} s}{\mathrm{d} t}=10t^2-8$

$ds=(10t^2-8)dt\\\int\limits ds =\int(10t^2-8) dt\\s=\frac{10}{3} t^2-8t+b$

now using condition given s=50 at t=0

b=50

now equation becomes

$s=\frac{10}{3}t^3-8t+50$

calculating s at t=3s

s=116m

6 0

2 years ago

A flywheel performs each of these functions except: A. Contains a gear used for engine starting B. Smoothes engine operation C.

torisob [31]

Answer:

C. Provides lubrication to parts

Explanation:

Flywheel :

Flywheel is a device which stored the mechanical energy.This energy can be use when more energy required during any operation.Due to high moment of inertia of the flywheel it resist the change in the speed .The flywheel is attached to the crank shaft at the rear side of the engine.

The flywheel perform following function:

1. It connects the crankshaft and the transmission system.

2.It makes the engine operation smooth.

3.It contains gear and other parts of the engine.

But it can not provide lubrication.

C. Provides lubrication to parts

4 0

2 years ago

A 150 MVA, 24 kV, 123% three-phase synchronous generator supplies a large network. The network voltage is 27 kV. The phase angle

Aleks04 [339]

Answer:

the generator induced voltage is 60.59 kV

Explanation:

Given:

S = 150 MVA

Vline = 24 kV = 24000 V

$X_{s} =1.23(\frac{V_{line}^{2} }{s} )=1.23\frac{24000^{2} }{1500} =4723.2 ohms$

the network voltage phase is

$V_{phase} =\frac{V_{nline} }{\sqrt{3} } =\frac{27}{\sqrt{3} } =15.58kV$

the power transmitted is equal to:

$|E|=\frac{P*X_{s} }{3*|V_{phase}|sinO } ;if-O=60\\|E|=\frac{300*4.723}{3*15.58*sin60} =34.98kV$

the line induced voltage is

$|E_{line} |=\sqrt{3} *|E|=\sqrt{3} *34.98=60.59kV$

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2 years ago

A video inspection snake is use

LekaFEV [45]

Answer:

very good thx

Explanation:

5 0

2 years ago