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3 years ago

12

If the engine oil temperature and cylinder head temperature gauges have exceeded their normal operating range, the pilot may hav

e been operating with _________.

1 answer:

Mariulka [41]3 years ago

3 0

Answer:

"too much power and with the mixture set too lean."

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A stainless steel ball (rho = 8055 kg/m3, cp = 480 J/kg·K) of diameter D = 0.21 m is removed from the oven at a uniform temperat

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Answer:

Explanation:

The complete detailed explanation which answer the question efficiently is shown in the attached files below.

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4 years ago

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An insulated mixing chamber receives 0.5 kg/s of steam at 3 MPa and 300°C through one inlet, and saturated liquid water at 3 MPa

maxonik [38]

Answer:

$\dot m_{2} = 0.199\,\frac{kg}{s}$

Explanation:

The mixing chamber can be modelled by applying the First Law of Thermodynamics:

$\dot W_{in}+\dot m_{1}\cdot h_{1} +\dot m_{2} \cdot h_{2} - \dot m_{3}\cdot h_{3} = 0$

Since that mass flow rate of water at inlet 1 is the only known variable, the expression has to be simplified like this:

$\frac{\dot W_{in}}{\dot m_{1}} + h_{1}+ y\cdot h_{2} - z\cdot h_{3} = 0$

Besides, the following expression derived from the Principle of Mass Conservation is presented below:

$1 + y = z$

Then, the expression is simplified afterwards:

$\frac{\dot W_{in}}{\dot m_{1}} + h_{1}+ y\cdot h_{2} - (1+y)\cdot h_{3} = 0$

$\frac{\dot W_{in}}{\dot m_{1}} +h_{1} - h_{3} + y\cdot (h_{2}-h_{3}) = 0$

Specific enthalpies are obtained from steam tables and described as follows:

State 1 (Superheated vapor)

$h = 2994.3\,\frac{kJ}{kg}$

State 2 (Saturated liquid)

$h = 1008.3\,\frac{kJ}{kg}$

State 3 (Liquid-Vapor mixture)

$h = 2444.22\,\frac{kJ}{kg}$

The ratio of the stream at state 2 to the stream at state 1 is:

$y = \frac{\frac{\dot W_{in}}{\dot m_{1}}+h_{1}-h_{3}}{h_{3}-h_{2}}$

$y = \frac{\frac{10\,kW}{0.5\,\frac{kg}{s} }+2994.3\,\frac{kJ}{kg}-2444.22\,\frac{kJ}{kg} }{2444.22\,\frac{kJ}{kg}-1008.3\,\frac{kJ}{kg} }$

$y = 0.397$

The mass flow rate of the saturated liquid is:

$\dot m_{2} = y\cdot \dot m_{1}$

$\dot m_{2} = 0.397\cdot (0.5\,\frac{kg}{s} )$

$\dot m_{2} = 0.199\,\frac{kg}{s}$

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3 years ago

List the parts of a manual transmission <br><br> List the parts of a typical clutch assembly?

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Clutch Cover.

Clutch Bearing (Release bearing)

Release Fork (clutch fork)

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3 years ago

What is professional engineering?

Nina [5.8K]

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3 years ago

A cybersecurity manager has scheduled biannual meetings with the IT team and department leaders to discuss how they would respon

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1. Cybersecurity Strategy Development Guide

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a structured approach for long-term engagement with utilities on cybersecurity matters. The guide

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2. Understanding Cybersecurity Preparedness: Questions for Utilities

The Questions for Utilities provides a set of comprehensive, context-sensitive questions that PUCs

can ask a utility to gain a detailed understanding of its current cybersecurity risk management

program and practices. The questions build upon and add to those included in previous NARUC

publications. (2019)

3. Cybersecurity Preparedness Evaluation Tool (CPET)

The CPET provides a structured approach for PUCs to use in assessing the maturity of a utility’s

cybersecurity risk management program and gauging capability improvements over time. The

CPET is designed to be used with the Questions for Utilities on an iterative basis to help PUCs

identify cybersecurity gaps, spur utilities’ adoption of additional mitigation strategies, and inform

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4. Cybersecurity Tabletop Exercise (TTX) Guide

This guide details the steps that PUCs can take to design and execute an exercise to examine utilities’

and other stakeholders’ readiness to respond to and recover from a cybersecurity incident. The

guide also is helpful to PUCs seeking to exercise their own cybersecurity strategies and capabilities.

Exercise scenarios and examples are included. (2020)

5. Cybersecurity Glossary

The Glossary contains cybersecurity terms used throughout the Cybersecurity Manual, as well as

“terms of art” that utilities may use during discussions with PUCs. (2019)

Components of the Cybersecurity Manual can be used individually but are designed to work together.

NARUC’s intent is to provide a comprehensive set of assessment tools that, when applied, provide a consistent,

complete view of utilities’ cybersecurity preparedness.

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3 years ago