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Questions and Answers
What is the noise voltage calculated using the formula $V_{noise} = \sqrt{4kTR(BW-f)}$ with Ambient Temperature 65⁰C, Frequency 10 kHz, Resistance 100 Ohms?
What is the noise voltage calculated using the formula $V_{noise} = \sqrt{4kTR(BW-f)}$ with Ambient Temperature 65⁰C, Frequency 10 kHz, Resistance 100 Ohms?
- 1.9 nV
- 0.1 microV
- 1.9 microV (correct)
- 1.0 nV
How should an uninterruptible power system be connected to the network?
How should an uninterruptible power system be connected to the network?
- Parallel to feed electrical power at critical time
- Parallel to feed electrical power at normal time (correct)
- Series to feed electrical power at critical time
- Series to feed electrical power at normal time
In a power flow study, which statement is most correct?
In a power flow study, which statement is most correct?
- One bus is a voltage-controlled bus, and others are slack or load buses
- There may be multiple slack, voltage-controlled, and load buses designated.
- One bus is designated as a slack bus, and the others are voltage-controlled or load buses (correct)
- One bus is a load bus, and others are voltage-controlled or slack buses
Which type of engineer conducts reliability and sustainability tests?
Which type of engineer conducts reliability and sustainability tests?
Which of the following statements is not correct based on Ohm’s Law?
Which of the following statements is not correct based on Ohm’s Law?
What does the room amplifier in a wireless system amplify?
What does the room amplifier in a wireless system amplify?
Harmonic currents in a power system may cause which of the following?
Harmonic currents in a power system may cause which of the following?
In the wind load formula for overhead line structures, what does the term Kz represent?
In the wind load formula for overhead line structures, what does the term Kz represent?
Which resonant modes does the oscillator circuit use?
Which resonant modes does the oscillator circuit use?
What function does the OP-AMP circuit perform?
What function does the OP-AMP circuit perform?
What is the best economical way to start a single-phase motor?
What is the best economical way to start a single-phase motor?
What describes the strength of materials?
What describes the strength of materials?
For which circuit elements is superposition valid?
For which circuit elements is superposition valid?
What is the difference between EPROM and EEPROM?
What is the difference between EPROM and EEPROM?
Why is steel used in concrete structures?
Why is steel used in concrete structures?
For a 12 AWG wire, what should be the circuit breaker rating?
For a 12 AWG wire, what should be the circuit breaker rating?
If the fuse rating is 8 Amperes, what does that mean?
If the fuse rating is 8 Amperes, what does that mean?
What makes CMOS Inverter superior to R-Pull up inverters?
What makes CMOS Inverter superior to R-Pull up inverters?
The delay time for series of activities that would not affect the project timing is called what?
The delay time for series of activities that would not affect the project timing is called what?
Which one of the following does not describe ceramics?
Which one of the following does not describe ceramics?
Which device is used to measure potential difference?
Which device is used to measure potential difference?
The most appropriate site for a new library is one adjacent to which areas?
The most appropriate site for a new library is one adjacent to which areas?
What is usually specified with Number 34 in 'N34’ E'?
What is usually specified with Number 34 in 'N34’ E'?
Changing the excitation in a grid connected to an alternator will have what effect?
Changing the excitation in a grid connected to an alternator will have what effect?
Sensor transducers will transfer what?
Sensor transducers will transfer what?
What is the term for component arrangement for waves in transmitting and receiving?
What is the term for component arrangement for waves in transmitting and receiving?
What can a passive filter do?
What can a passive filter do?
Which type of material has high thermal and electrical conductivity?
Which type of material has high thermal and electrical conductivity?
Given $V = 50 \cos(40wt + 30) + 28.2 \cos(40wt + 30)$ and $R = 5$, find P:
Given $V = 50 \cos(40wt + 30) + 28.2 \cos(40wt + 30)$ and $R = 5$, find P:
What is the payback period for a project with initial investment of 2.0 million QR and net annual profit of 150,000 QR using a 10% desired rate of return?
What is the payback period for a project with initial investment of 2.0 million QR and net annual profit of 150,000 QR using a 10% desired rate of return?
Which systems use Assembly language?
Which systems use Assembly language?
Which describes a weak power system?
Which describes a weak power system?
For the diagram shown, what is the required minimum clearance distance, R, if the phase voltage is 13,800V?
For the diagram shown, what is the required minimum clearance distance, R, if the phase voltage is 13,800V?
Project Control will occur at which stage?
Project Control will occur at which stage?
What is the slip frequency if a 50Hz induction machine no-load speed is 2900 rpm?
What is the slip frequency if a 50Hz induction machine no-load speed is 2900 rpm?
Which special purpose diode is formed by a junction between metals and a semiconductor?
Which special purpose diode is formed by a junction between metals and a semiconductor?
What is the worth after 5 years of an investment of One Million Qatari Riyals if the APR is 9% paid monthly?
What is the worth after 5 years of an investment of One Million Qatari Riyals if the APR is 9% paid monthly?
What is not part of Scope Management?
What is not part of Scope Management?
What process identifies, studies, analyzes, and rectifies the root cause of incidents?
What process identifies, studies, analyzes, and rectifies the root cause of incidents?
Which is not a typical type of activity dependency in time management?
Which is not a typical type of activity dependency in time management?
Which is not a resource related to activities?
Which is not a resource related to activities?
When is the process of decomposing deliverables into manageable components complete?
When is the process of decomposing deliverables into manageable components complete?
Which does project life cycle differ from product life cycle?
Which does project life cycle differ from product life cycle?
When is the best time to assign a project manager to a project?
When is the best time to assign a project manager to a project?
What is called the process of scheduling periodic tasks based on the highest priority for tasks with the shortest period?
What is called the process of scheduling periodic tasks based on the highest priority for tasks with the shortest period?
What is the final step in defining a work breakdown structure?
What is the final step in defining a work breakdown structure?
In transformer saturation, what occurs?
In transformer saturation, what occurs?
Which statement is most nearly correct when using symmetrical components?
Which statement is most nearly correct when using symmetrical components?
To ensure an instrument does not drift with time, what should we do?
To ensure an instrument does not drift with time, what should we do?
What are the most important components of sustainability?
What are the most important components of sustainability?
For the design and implementation of smoke detectors and door control systems, it is preferable to use what?
For the design and implementation of smoke detectors and door control systems, it is preferable to use what?
What does QSAS stand for?
What does QSAS stand for?
According to Brundtland Report, what are the three main pillars of sustainable development?
According to Brundtland Report, what are the three main pillars of sustainable development?
What is the most commonly used circuit breaker in distribution level?
What is the most commonly used circuit breaker in distribution level?
Which transmission voltage is not applicable in Qatar?
Which transmission voltage is not applicable in Qatar?
Which of the following has the highest input impedance?
Which of the following has the highest input impedance?
What is the definition of a battery that has long self-discharge property?
What is the definition of a battery that has long self-discharge property?
What is the transconductance of BJT?
What is the transconductance of BJT?
The power factor of an alternator depends on what?
The power factor of an alternator depends on what?
What is the induction load running at stability slip?
What is the induction load running at stability slip?
If an induction motor speed at no load is 745 RPM, what is the rated speed?
If an induction motor speed at no load is 745 RPM, what is the rated speed?
What type of RCC will give high tensile strength?
What type of RCC will give high tensile strength?
What is the resistance for a potential of 100W and 200V?
What is the resistance for a potential of 100W and 200V?
What is the unit of conductance?
What is the unit of conductance?
What is the unit of conductivity?
What is the unit of conductivity?
What is the unit of resistance?
What is the unit of resistance?
What is the unit of resistivity?
What is the unit of resistivity?
What is the primary concern when using current transformers with a differential relay?
What is the primary concern when using current transformers with a differential relay?
A wristwatch mercury cell has what capacity?
A wristwatch mercury cell has what capacity?
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Study Notes
Electrical/Electronic Engineering Key Concepts
-
Thermal Noise Calculation
- Formula: ( V_{noise} = \sqrt{4kTR(BW-f)} )
- Parameters:
- Ambient Temperature: 65°C
- Boltzmann's constant ( k = 1.38 \times 10^{-23} )
- Resistance: 100 Ohms
- Frequency: 10 kHz
-
Uninterruptible Power Supply (UPS)
- Should be connected in parallel to feed electrical power during normal operation.
-
Power-Flow Study
- Importance of differentiating bus types:
- Slack bus: Designated for voltage control.
- Voltage-controlled & load buses serve specified roles.
- Importance of differentiating bus types:
-
Reliability Testing
- Performed by Testing Engineers, focusing on system reliability and sustainability.
-
Ohm’s Law Misconceptions
- Incorrect articulation: Current/Potential ≠ Constant.
-
Wireless Systems
- The room amplifier amplifies encoded and modulated signals.
-
Harmonic Effects
- Harmonics can cause excessive heating, circuit malfunctions, and resonance.
-
Resistance Combinations
- Three 1-Ohm resistors yield 5 different total resistance values in various combinations.
-
Wind Load Calculation
- Wind load ( L_{Si} ) involves parameters including ( Kz ), representing the Velocity Pressure Coefficient.
-
Lamp Resistance
- For a 100W lamp at 200V, the resistance calculated is 400 Ohms.
-
Oscillator Circuit
- Operates in series resonant mode using a crystal.
-
Operational Amplifiers (OP-AMP)
- Functions vary; one may perform integration or differentiation.
-
Motor Starting Methods
- Inductive method is ideal for starting single-phase motors economically.
-
Strength of Materials
- Refers to their ability to withstand applied load without failure.
-
Superposition Principle
- Valid for circuits incorporating independent sources.
-
EPROM vs. EEPROM
- EEPROM is re-erasable electrically, whereas EPROM requires ultraviolet light for erasure.
-
Steel in Concrete Structures
- Used for high rigidity and matching thermal expansion with concrete.
-
12 AWG Wire Circuit Breaker Rating
- Typical rating is 20A.
-
Fuse Rating
- An 8A fuse melts if current exceeds 8A.
-
CMOS Inverter Advantages
- Notable for high impedance and lower propagation delay.
-
Project Control
- Integral throughout the entire project process, including construction.
-
Induction Motors
- No-load speed and slip frequency calculations are essential for performance evaluation.
-
Types of Diodes
- A Schottky diode is formed at the junction of metal and semiconductor.
-
Investment Returns
- Payback period calculations utilize net profit and desired rate of return.
-
Sustainability Components
- Economic, social, and environmental factors are equally vital.
-
Fire Alarm Systems
- Microcontrollers are preferred for design and implementation.
-
QSAS Definition
- Stands for Qatar Sustainability Assessment System.
-
Brundtland Report Attributes
- Defines sustainability through economic, environmental, and social pillars.
-
Direct Costs in Projects
- Examples exclude safety expenses, classified as indirect costs.
-
Work Breakdown Structure (WBS)
- Decomposition is achieved when all work elements are manageable.
-
Circuit Breaker Functions
- Differentiated by current interrupting capabilities and application in various contexts.
-
Battery Life Calculation
- A mercury battery of specified capacity can last for 18 months at defined current draw.
-
Stability of Systems
- Requires analysis against established criteria for assessing operational conditions.
These notes summarize critical points and concepts essential for understanding Electrical/Electronic Engineering principles examined in the reviewer material.
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