Engineering Concepts Quiz

Questions and Answers

Given data is: Ambient Temperature is 65⁰C (k value is 1.38 x 10-23) Frequency is 10 kHz Resistance is 100 Ohms Formula is given as hint Vnoise = root over 4kTR (BW-f):

1.9 microV

1.0 nV

1.9 nV

0.1 microV (correct)

Uninterruptible power system has to be connected to the network by:

Series to feed electrical power at normal time

Parallel to feed electrical power at normal time

Series to feed electrical power at critical time

Parallel to feed electrical power at critical time (correct)

In conducting a power-flow (or load flow) study using conventional iterative calculation, which of the following statements is most nearly correct?

A. One bus is designated as a slack bus, and the others are designated as voltage-controlled buses or load buses (correct)

One bus is designated as a voltage-controlled bus, and the others are designated as slack buses or load buses.

One bus is designated as a load bus, and the others are designated as voltage-controlled buses or slack buses.

There may be any number of slack buses, voltage-controlled buses, and load buses designated, as long as they total the number of buses in the network.

Which one of the following is not correct based on Ohm’s Law?

Current = Potential x Resistance Signup and view all the answers

Which of the following engineer do the tests for the reliability and sustainability?

Testing Engineer Signup and view all the answers

The room amplifier in a wireless system amplifies:

The baseband signals Signup and view all the answers

We have three resistance each of 1 Ohm. How many different values of resistance can be obtained by different series-parallel combinations if all the three resistance are to remain in the circuit?

4 Signup and view all the answers

Harmonic currents present in a power system may cause:

All of the above Signup and view all the answers

The wind load LSi in Newton’s on an overhead line structure is calculated using the following formula. Lsi = 0.613v2 m/s KzGRF / CfAm2. What does the Kz term represents?

Velocity Pressure Coefficient Signup and view all the answers

The resistance of 100W, 200V tamp is:

400 ohms Signup and view all the answers

Consider the oscillator circuit shown below. The circuit uses which resonant modes of the crystal X1:

Series Resonant Signup and view all the answers

What is the best economical way to start a single-phase motor?

Capacitive method Signup and view all the answers

The OP-AMP circuit shown performs the function of:

Integration Signup and view all the answers

Strength of Materials?

Ability to withstand an applied load without failure or plastic deformation Signup and view all the answers

For which of the following circuits elements is superposition valid?

Independent source Signup and view all the answers

What is the difference between EPROM and EEPROM?

EEPROM is erased by exposing ultraviolet and EPROM by electrically. Signup and view all the answers

Why steel is used in concert structure because?

temperature expansion coefficient is same with cement/concrete Signup and view all the answers

For a 12AWG wire we should use CB rating:

20A Signup and view all the answers

If fuse rate = 8 Ampere, what does mean?

It will melt if current exceeds 8A Signup and view all the answers

CMOS Inverter is superior to the R-Pull up inverter due to:

Smaller propagation delay Signup and view all the answers

The delay time for a series of activities that would not affect if occurred the project timing called:

Total Slack (Total Float) Signup and view all the answers

Number 34 in the following “N34’ E” usually will be specified with:

Bearing Signup and view all the answers

Which one of the following is not describes ceramic?

High Conductivity Signup and view all the answers

The device used for measuring potential difference is known as:

Voltmeter Signup and view all the answers

Among the sites being considered for a new main library are those adjacent to the following areas or services. The most appropriate site is one that is adjacent to:

A residential neighborhood and recreation facilities Signup and view all the answers

Changing in the excitation in grid having an alternator connected to it will having the following effect:

Change in reactive component of load Signup and view all the answers

Sensor transducers will transfer:

Move to electrical signals Signup and view all the answers

What does TQM stand for?

Total Quality Management Signup and view all the answers

A passive filter can:

filter only Signup and view all the answers

Which of the following types of material has high thermal and electrical conductivity?

Metal Signup and view all the answers

V = 50 Cos (40wt + 30) + 28.2 Cos (40wt + 30), R = 5, find P:

330 Signup and view all the answers

The initial investment for a project is 2.0 million QR. A net annual profit of 150,000 QR is anticipated. Using a 10% desired rate of return on the investment what is the payback period for the project?

8.89 years Signup and view all the answers

Which of the following systems uses Assembly language?

Microcontrollers Signup and view all the answers

Weak power system means:

Power system with low short circuit capability and high sensitivity to harmonics Signup and view all the answers

For the diagram shown, what is the approximate required minimum clearance distance, R, if the phase voltage of the live parts is 13,800V?

4.0m Signup and view all the answers

Project Control will be:

Throughout the process Signup and view all the answers

In 50Hz induction machine, if the no load speed is 2900 rpm, the slip frequency is:

1.67 Hz Signup and view all the answers

Which of the special purpose diodes formed by a junction between a layer of metals and layer of semiconductor?

A Schottky diode Signup and view all the answers

What is the worth after 5 years of an investment of One Million Qatari Riyals if the APR is 9% paid monthly?

1,538,634 Signup and view all the answers

Which is not part of Scope Management?

Execute Scope Signup and view all the answers

Process to identify, study, analyze, and rectify root cause of incidents is called:

Cause and Effect Analysis Signup and view all the answers

In the context of time management, which is not a typical type of activity dependency:

Multiple dependency Signup and view all the answers

Which is not a resource related to activities

Time Signup and view all the answers

Process of decomposing deliverables into smaller, more manageable components is complete when:

Each work element can be found in the WBS Signup and view all the answers

Project life cycle is different than product life cycle in that project life cycle:

Describes project management activities Signup and view all the answers

Best time to assign a project manager to a project is during:

Initiation Signup and view all the answers

Scheduling periodic tasks to execute on a processor based on assigning the highest priority to the task that has the shortest period (greatest frequency) is:

Rate monotonic Signup and view all the answers

The final step in the definition of a work breakdown structure is to:

Assign codes for each activity of the work package Signup and view all the answers

In transformer saturation:

The efficiency decreases and the no load current increases Signup and view all the answers

When using the method of symmetrical components, which of the following statements is most nearly correct:

Positive sequence and negative sequence currents cannot pass through the neutral grounding resistor in a wye-connected generator. Signup and view all the answers

To make sure that an instrument did not drift with time, we need to:

Calibrate it Signup and view all the answers

What are the most important components of sustainability?

All are equally important Signup and view all the answers

Among the sites being considered for a new main library are those adjacent to the following areas or services. The most appropriate site is one that is adjacent to:

A residential neighborhood and recreation facilities Signup and view all the answers

For the design and implementation of smoke detectors and door control system, it is preferable to use:

ASIC Signup and view all the answers

What does QSAS stands?

Qatar Sustainability Assessment System Signup and view all the answers

According to Brundtland Report (WCED, 1987) defining the main attributes of sustainability and sustainable development, what are the three main pillars of sustainable development?

Economic, Environmental and Social factors Signup and view all the answers

Project management is ideally suited except:

D Signup and view all the answers

The assembly language is usually used for programming:

Microcontrollers Signup and view all the answers

Project management is ideally suited except:

Repeatability Signup and view all the answers

In the circuit below, Switch S1 closes at t = 0. The diode D is rated at a maximum peak current of 5A. Assume that the initial charge on the capacitor is zero. The minimum value of R (n) to prevent exceeding the diode maximum peak current is most nearly:

33 Signup and view all the answers

A circuit breaker is:

A current interrupting device Signup and view all the answers

The term sustainability refers to:

Keeping the natural environment and human society in happy, healthy and functional state. Signup and view all the answers

Which of the following would not be classified as a direct cost?

Safety and first aid expenses Signup and view all the answers

In circuit 27 is given and along with 52 mentioned:

Under voltage relay in CB Signup and view all the answers

AM radio signal is modulated how?

Quadrature amplitude modulated Signup and view all the answers

Two coils are in series. The H is 4 and mutual inductance value is 0.75. Hint: induction = K:

4 Signup and view all the answers

Which system will cause saturated currents?

50 Hz transformer by rated MVA but 60 Hz Signup and view all the answers

A battery which factor is least dependent for long self-discharge property:

concentration of electrolyte Signup and view all the answers

Transconductance of BJT is:

Ic / VBE Signup and view all the answers

The power factor of an alternator depends on:

Load Signup and view all the answers

Induction load running at stability slip is:

1 Signup and view all the answers

If an induction motor speed at no-load is 745 RPM, what is the speed of the motor:

750 RPM Signup and view all the answers

Common breakers used in distribution level:

Air brake circuit breaker Signup and view all the answers

Fire Alarm and Smoke Detector is preferable to use:

ASIC Signup and view all the answers

Which transmission voltage is not applicable in Qatar?

400 kV Signup and view all the answers

Which one is the highest input impedance?

MOSFET Signup and view all the answers

Embedded System should have best:

Dynamic response Signup and view all the answers

Embedded System working on which platform:

Microcontrollers Signup and view all the answers

Harmonics in system is mainly due to:

All of the above Signup and view all the answers

Reinforce concrete will give:

Both Signup and view all the answers

What is the resistance for 100W and 200V potentials?

400 Signup and view all the answers

The unit of conductance:

Mho Signup and view all the answers

The unit of conductivity:

Mho/m Signup and view all the answers

The unit of resistance:

Ohm Signup and view all the answers

The unit of resistivity

Ohm-m Signup and view all the answers

A differential relay designed to protect a zone of the distribution system, uses current transformer (CTs) connected to annually CTs. The auxiliary CTs must match both the phase shift and the ratio of the differential relays CTs if the values do not match. Which of the following is the least likely outcome?

The trip could occur only when the CTs are wired in parallel. Signup and view all the answers

A Wrist watch mercury cell has a capacity of 200 x 10-3 AH. How many months can the watch function without replacement if it draws 15 x 10-6 A?

18 months Signup and view all the answers

The system shown is stable for:

k > -2 Signup and view all the answers

According to the Nyquist Sampling theorem, a sufficient condition for these to be no aliasing in the sampled signal is that the highest frequency in the signal point to sampling must be:

less than the half of the sampling frequencyc Signup and view all the answers

A biomedical signal is sampled at 128Hz, no anti-aliasing fiber is used. Spectral analysis on the sampled data shows strong sit. The most likely source of the 58 Hz component is:

70 Hz source in the original signal Signup and view all the answers

Which of the following characteristics of a data network is never a correct of a packet switched network?

Individual packets of a long message can be routed under different paths by the switching exchange equipment. Signup and view all the answers

During which of the following categories are you more likely to find status reports many changes and the creation of forecasts?

Execution Signup and view all the answers

In Hardware Description Language (HDL) the designer can specify the input and output. At what stage of function, name of input and output specified?

Entity Declaration Signup and view all the answers

The equipment arrangement for transmit/receive of radio signal:

Dish Antenna Signup and view all the answers

The critical path in a project network is the:

Longest path through the network Signup and view all the answers

A D’Arsonval movement is with a resistance of 150 ohms is used to make ammeter. What is the maximum deflection range of ammeter?

0.3 A Signup and view all the answers

A computer network graph as below, where the vertices represents the computer and nodes represents the network connectivity. The diameter is used to determine throughput of network. Each weigh is one. What is the diameter?

3 Signup and view all the answers

Which one of the following is not correct based on Ohm’s Law?

Current = Potential x Resistance Signup and view all the answers

A cyclic redundancy check (CRC) generator is based on what operation?

Modulo 2 Division Signup and view all the answers

Which of the following junction nodes are forward biased?

Anode = +5V, Cathode = +3V Signup and view all the answers

For effective earthling, which of the following mixture is preferred for filling around the earth electrode?

Coal-Salt mixture Signup and view all the answers

While machine in operation, the slip of the synchronous machine is:

Zero Signup and view all the answers

What is analysis technique to determine effect of multi-sources?

Superposition Signup and view all the answers

A certain communication signal uses a bandwidth BW of 2kHz. What is the classification of this signal?

Narrowband VLF Signup and view all the answers

On the question above, what is the required supply resistance to ensure proper operation of the Zener regulator circuit?

19 Ω Signup and view all the answers

An alternator is operating at __________ for capacitive loads

Leading power factor Signup and view all the answers

Loading effect can be reduced in a system by using

Non-inverted Amplifier Signup and view all the answers

Type of amplifier at transmitter:

Power Amplifier Signup and view all the answers

Fan Out logic gate is:

Number of Gate connect to output Signup and view all the answers

The heat loss inside a straight conductor is 60J upon applying current I for 5s. If the resistance of the conductor is decrease to half, and the same current is applied for 5s, what will be the heat dissipation

30 Signup and view all the answers

For an inverter op-amp, what will be the equivalent output resistance?

Same as the input resistance Signup and view all the answers

When using Zener diode for voltage regulation, the output waveform shape will be affected by:

Dynamic resistance of the diode Signup and view all the answers

What is the low pass filter?

It will let pass low frequencies? Signup and view all the answers

The load resistance of cascade amplifier is:

The resistance after the second stage Signup and view all the answers

The output for the cascade amplifier is:

Output of the last stage. Signup and view all the answers

Cascade amplifier used to reduce load effect; the output impedance will be:

Low Signup and view all the answers

The dynamic output resistance of transistor in CB configuration is _____ at constant IE:

ФVCB / ФIC Signup and view all the answers

Study Notes

Alternator and Power Factor

Power factor of an alternator is influenced by load connected to the machine.
Core losses and rotor speed do not significantly affect power factor.

Fluorescent Light Flickering

Flickering in fluorescent lights is typically caused by low frequency.

Theorems and Frequencies

The Shannon Theorem is relevant for understanding frequency limitations in communication.

Project Network Representation

Activities in project networks can be represented by arrows and nodes.

Accreditation

ABET specializes in accrediting engineering education programs.

Cyclic Redundancy Check (CRC)

CRC generators operate on the principle of modulo 2 division.

Project Scope Planning

Initial project scope planning begins with defining objectives and customer requirements.

Fast Track Definition

Fast Track refers to construction starting before design completion.

Resistor Configurations

Resistors can be configured in various series and parallel combinations affecting equivalent resistance.

Cascade Amplifier

Cascade amplifiers reduce load effect and maintain high output impedance.

CPU Architecture

Different types of CPU architectures include non-pipelined and pipelined structures.

Incandescent Lamp Efficiency

Incandescent lamps operate most efficiently at unity power factor.

HRC Fuse Definition

HRC fuses stand for High Rupturing Capacity.

System Definition

A system comprises a group of elements functioning together.

Communication Channel Capacity

Channel capacity can be calculated using bandwidth and the signal-to-noise ratio (S/N).

Software Maintenance Types

Common types of software maintenance include adaptive, corrective, and perfective, excluding customer-initiated maintenance.

Transformer Protection

Best protection for transformers against lightning strikes involves phase-to-ground surge arresters.

Programmable Logic Arrays

Changing designations in programmable logic arrays reflect additional features such as input pins.

Bonds in Contracting

A performance bond guarantees completion of a project in case the contractor fails.

Transformer Turns Ratio

Turns ratio of transformers determine voltage conversion between primary and secondary sides.

TTL Logic Functions

Open collector output TTL technology mainly processes NOR logic functions.

Forward Biased Junction Nodes

Forward bias occurs when the anode voltage exceeds the cathode voltage.

Object-Oriented Design Steps

Design process follows defined use cases, class diagrams, and collaboration diagrams.

Battery Current Withdrawal

Increased battery current typically decreases overall capacity due to higher polarization effects.

3-Phase Load Calculations

Line current for a 3-phase system can be calculated using load specifications and voltage.

BJT Amplification Regions

BJTs are primarily used for amplification in the active region.

Power Transformer Losses

Total losses in power transformers increase with the square of kVA load.

Power Plant Output

A generator's power output is calculated using its MVA rating and lagging power factor.

Transformer Noise

Transformer humming is primarily caused by vibrations in core laminations.

Synchronous Motors

Synchronous motors operating at leading power factor without load are termed synchronous condensers.

Flip-Flops in FPGAs

FPGAs commonly use D-type flip-flops.

Earthing Wire Gauge

The minimum standard wire gauge for earth wires is commonly set at 16 SWG.

Relational Data Models

Relations in record-based data models are represented as tables.

Project Life Cycle Stages

Key stages of a project life cycle include concept, initiation, planning, execution, and delivery/closure.

Measuring Instruments

Accuracy, precision, and reproducibility are critical terms related to measuring instruments.

Harmonic Sources

Variable impedance, saturable magnetic, and power electronic loads are common sources of harmonics.

Ethical Standards

Ethics embeds codes of behavior derived from societal and professional standards.

Voltage Across Resistors

Voltage across resistors can be calculated using Ohm's law and impedance formulas.### Transistors and Operational Amplifiers
The collector region of a transistor is doped lightly, impacting its electrical properties.
In an OP-AMP based inverting amplifier, the input impedance is infinite, while the output impedance is zero.
For a non-inverting amplifier using an OP-AMP, both the input and output impedance are infinite.

Signal Processing and Communications

An OP-AMP based non-inverting amplifier has infinite input impedance and zero output impedance.
The Nyquist Sampling Theorem states that to avoid aliasing, the highest frequency in the signal must be less than half the sampling frequency.
Frequency Division Multiplexing (FDM) in optical communication is referred to as Wavelength Division Multiplexing (WDM).

Circuit Functionality and Components

In a power doubling scenario at a transmitter, the decibel increase is 3 dB.
The circuit breaker commonly used at the distribution level is the Air Circuit Breaker.
For reliability calculations in circuits, if R1 = 0.92 and R2 = 0.85, the overall reliability is 0.99.

Engineering Design and Methodologies

Total Quality Management (TQM) emphasizes comprehensive quality control in processes and services.
Inter-symbol interference can be eliminated by applying the Nyquist Criterion.
Large scale integrated circuits (LSI) can serve functions like phase detection and phase locked loops.

Project Management

A Work Breakdown Structure (WBS) starts with the project itself as the highest element and details tasks as the lowest elements.
Project scheduling involves breaking down tasks, estimating time, and required resources.

Power Systems and Circuit Analysis

The power factor of an alternator is influenced by load, excitation, and speed.
In the case of a 50 Hz induction machine with no load speed of 2900 RPM, the slip frequency is calculated as 1.33 Hz.

Logic Gates and Mathematical Models

The fan-out of a logic gate refers to the number of gates connected to its output.
Linear regression models predict a variable Y based on X in a linear format.

Miscellaneous Knowledge

Liquid substances include mercury (Hg) among metals, while aluminum (Al) and nickel (Ni) are solid at room temperature.
In large scale projects, ASICs are typically faster and consume less power compared to microcontrollers and FPGAs.

DSP and ALU Architecture

For DSPs performing FFT operations, a fixed point multiplier with a 16-bit data path is the most cost-effective ALU architecture.

Engineering Skills

Engineers need to understand multiple engineering fields due to the interdisciplinary nature of modern projects.

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Description

Test your knowledge on various engineering concepts including alternators, fluorescent lights, and project planning. This quiz covers essential theories such as the Shannon Theorem and examines practical applications like CRC and resistor configurations.