Questions and Answers
For which of the following topologies can 10BaseT not be used without additional hardware conversion?
High voltage windings of transformer have ______ resistivity than the low voltage side.
ACR of conductor have 7 steel wires and 25 aluminum wires can be specified as:
The output D in the circuit is:
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Cable length is 1000m, time of returning signal is 9.43μsec. What is the speed of wave in the cable?
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The equivalent circuit of induction machine at no load is the same as that of the transformer but with:
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Which of these is not a rule of interaction?
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Within the battery, conventional current flow is:
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Activity on arrow needs to use dummy activities to avoid precedence problem that can happen due to:
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What is the average value of signal v(t) = 5 sin(377t)?
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A 3 phase transformer, 25MVA, 66-12.47kV, delta-wye connected, 8 percent impedance. On the 100 MVA, per unit impedance is most nearly:
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The voltage range is 0-100V. What type and magnitude of resistance required?
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The offset of a particular segment varies from:
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The power gain of 30dB is equivalent to which amplification factor?
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Study Notes
Alternators and Synchronous Motors
- An alternator is over excited when operating at a leading power factor.
- A synchronous motor is considered over excited when operating at a leading power factor.
Antennas
- A micro antenna is defined as a short antenna, typically used in compact devices.
Project Management
- Fast track scheduling aims to avoid future cost increases during construction.
- Fast tracking means to start the project before design completion.
Harvard Architecture
- The Harvard Architecture is characterized by separate code and data spaces.
Electromagnetism
- The force on a moving charge in a magnetic field is perpendicular to both the direction of the magnetic field and the motion of the charge.
Conductance
- The unit of conductance is the mho, the reciprocal of resistance, which is measured in ohms.
Engineering Education
- ABET stands for Accreditation Board for Engineering and Technology.
Circuit Functions
- For a high-frequency transfer function, the phase shift is -90°.
- A NOR gate outputs HIGH only when all inputs are LOW.
Harmonics and Noise
- The third harmonic frequency can be directly found from the fundamental frequency.
- Noise rejection techniques often involve filtering methods.
Voltage Regulation
- Minimum voltage regulation occurs at a unity power factor.
- High voltage winding in transformers generally has higher resistivity than low voltage windings.
Induction Motors
- In an induction motor, at no-load, slip is typically around 2%.
- When the rotor of an induction motor runs at synchronous speed, the torque produced is zero.
Filters and Signal Processing
- To eliminate DC offset, use a high pass filter.
- An active filter can perform functions such as filtering and amplifying signals.
Diode Functionality
- A Zener diode primarily provides voltage regulation in circuits.
Resistance and Power
- When resistance is decreased to half while applying the same current, heat dissipation is reduced as per Joule's law, resulting in 30J loss for 5s.
Cascading Amplifiers
- In cascade amplifiers, to minimize loading effects, the output impedance of the last stage should be very high.
Communication Systems
- For a communication signal with a bandwidth of 2kHz, it's classified as narrowband.
- The Zener current is crucial for proper operation of Zener regulator circuits.
Signal Wave Analysis
- Velocity of a signal wave in a cable can be derived from the time taken for the signal to return, indicating a speed calculation related to the length of the cable.
Transformer Testing
- Open circuit tests on transformers measure core losses which include hysteresis and eddy current losses.
Current and Magnetic Field Relations
- The magnetic field intensity near a wire carrying current can be found using the formula: H = I / (2πr).
Battery Characteristics
- The traditional flow of conventional current inside a battery runs from the positive electrode to the negative electrode.
Engineering Management
- Managers should engage clients in ensuring that project requirements are continually met through regular progress checking.
Amplification and Signal Gain
- An amplifier with negative feedback will have a lower voltage gain compared to the gain without feedback.
Cable Losses and Capacitors
- Capacitors in parallel configurations will combine to enhance the overall capacitance effectiveness in circuits.
Project Scheduling
- Activity durations in project scheduling impact the minimum time to project completion based on task dependencies.
Definitions of Terms
- Power factor relates to the cosine of the angle between current and voltage; it's essential for calculating power in AC circuits.
These bullet points encapsulate key information and principles across various subjects within Electrical and Electronic Engineering, aiding in effective revision and understanding.
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Description
Test your knowledge with this UPDA Electrical/Electronic Engineering reviewer quiz. It covers key concepts such as alternators, synchronous motors, and micro antennas, providing a solid foundation for electrical engineering students. Challenge yourself and identify the correct answers for various scenarios in electrical engineering.
